CN101563921A - Communication system, transmitting device, receiving device, communication method, program and communication cable - Google Patents

Communication system, transmitting device, receiving device, communication method, program and communication cable Download PDF

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Publication number
CN101563921A
CN101563921A CNA2007800466419A CN200780046641A CN101563921A CN 101563921 A CN101563921 A CN 101563921A CN A2007800466419 A CNA2007800466419 A CN A2007800466419A CN 200780046641 A CN200780046641 A CN 200780046641A CN 101563921 A CN101563921 A CN 101563921A
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signal
receiver
data
transmitter
transmission
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CN101563921B (en
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中岛康久
菊池秀和
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Sony Corp
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Sony Corp
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Priority to CN201010599583.6A priority Critical patent/CN102111599B/en
Priority claimed from PCT/JP2007/071600 external-priority patent/WO2008056686A1/en
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Abstract

The present invention is related to a communication system, a transmitting device, a receiving device, a communication method, a program and a communication cable that can be configured to carry out high speed bidirectional communication while maintaining compatibility. In the case where an HDMI(R) source (71) and an HDMI(R) sync (72) carry out bidirectional IP communication through a CEC line (84) and a signal line (141), a changeover control unit (121) controls a switch (133) so that a partial signal that composes a differential signal from a converting unit (131) is selected through the switch (133) at data transmitting time and so that a partial signal that composes a differential signal from a receiver (82) is selected at data transmitting time. In the case where bidirectional IP communication is carried out only through the CEC line (84), the changeover control unit (121) controls the switch (133) so that a CEC signal from the HDMI(R) source (71) or the receiver (82) is selected through the switch (133). The present invention can be applied to an HDMI(R), for instance.

Description

Communication system, transmitter, receiver, communication means, program and the communications cable
Technical field
The present invention relates to a kind of communication system, transmitter, receiver, communication means, program and the communications cable, particularly relate to and high-speed communication is provided and has compatible communication system, transmitter, receiver, communication means, program and the communications cable with the communication interface of unidirectional high-speed transfer that HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface, HDMI (R)) etc. can be carried out the pixel data of non-compressed image.
Background technology
In recent years, HDMI (R) for example is widely used as from digital universal disc (DVD) register, set-top box or other audio frequency and video (AV) source to television receiver, projecting apparatus or other display high-speed transfer digital television signal, is the pixel data of non-compression (base band) image and the high-speed communication interface of the voice data relevant with this image.
The HDMI specification defined be used for pixel data and voice data from HDMI (R) source end (source) to the transition minimized differential signaling of the high speed one-way transmission of HDMI (R) destination end (sink) (Transition Minimized Differential Signaling, TMDS) passage and be used for HDMI (R) source end and HDMI (R) destination end between consumer electronics's control line (Consumer Electronics Control Line) (CEC line) etc. of two-way communication.
For example, as shown in Figure 1, digital television receiver 11 is connected to AV amplifier 12 by using HDMI (R) cable 13 according to HDMI (R) specification, can high-speed transfer pixel data and voice data.
Digital television receiver 11 and AV amplifier 12 and transcriber 14 are placed in the living room of user's family.In Fig. 1, the living room is positioned at the left side.Use HDMI (R) cable 13 that digital television receiver 11 is connected to AV amplifier 12.Use HDMI (R) cable 15 that AV amplifier 12 is connected to transcriber 14.
In addition, hub 16 is placed in the living room.Use Local Area Network cable 17 and 18 respectively digital television receiver 11 and transcriber 14 to be connected to hub 16.Digital television receiver 19 is placed in the bedroom that is arranged in the right, living room in the drawings.Digital television receiver 19 is connected with hub 16 via LAN cable 20.
For example, when playback of recorded in transcriber 14 content and on digital television receiver 11 during display image, 14 pairs of pixel data and voice datas as playback of content of transcriber are decoded.After this, transcriber 14 offers digital television receiver 11 with decoded non-packed pixel data and voice data via HDMI (R) cable 15, AV amplifier 12 and HDMI (R) cable 13.According to pixel data that provides from transcriber 14 and voice data, digital television receiver 11 display images and output sound.
When playback of recorded in transcriber 14 content and on digital television receiver 11 and 19 simultaneously during display image, transcriber 14 will offer digital television receiver 11 via LAN cable 18, hub 16 and LAN cable 17 as the packed pixel data and the voice data of the content that will reset.In addition, transcriber 14 offers digital television receiver 19 with packed pixel data and voice data via LAN cable 18, hub 16 and LAN cable 20.
Digital television receiver 11 and 19 pairs of pixel data and voice datas that provide from transcriber 14 are decoded, according to decoded non-packed pixel data and voice data display image and output sound.
When digital television receiver 11 receives the pixel data of the program that is used for replaying tv broadcasting and voice data, the voice data of the 5.1 sound channel surround sounds that if received voice data for example is a digital television receiver 11 can not decode, then digital television receiver 11 converts this voice data light signal to and this light signal is sent to AV amplifier 12.
After receiving the light signal that sends from digital television receiver 11, AV amplifier 12 becomes voice data with this light signal opto-electronic conversion.Then, the voice data after 12 pairs of conversions of AV amplifier is decoded.Then, AV amplifier 12 amplifies decoded non-audio compressed data as required, thereby from connected circulating loudspeaker output sound.Like this, by the pixel data that is received being decoded and using decoded pixel data display image, and by according to the voice data that offers AV amplifier 12 from AV amplifier 12 output sounds, digital television receiver 11 can be reset 5.1 sound channels around TV programme.
In addition, someone proposes a kind of device based on HDMI (R), in this device, send pixel data and voice data from HDMI (R) source end to HDMI (R) destination end, weaken unwanted data (for example with reference to patent documentation 1) by the on/off transfer of data.
And, someone proposes a kind of device based on HDMI (R), in this device, by using the terminal of selector switch and selection output pixel data and voice data, HDMI (R) source end can not change under HDMI (R) source end and the situation that cable between HDMI (R) destination end is connected HDMI (R) the destination end output pixel data of the hope in a plurality of HDMI (R) destination end and voice data (for example with reference to patent documentation 2).
Patent documentation 1: the open No.2005-57714 of Japanese unexamined patent
Patent documentation 2: the open No.2006-19948 of Japanese unexamined patent
Summary of the invention
As mentioned above, use HDMI (R), can be from HDMI (R) source end to HDMI (R) destination end one-way transmission pixel data and voice data at high speed.In addition, can between HDMI (R) source end and HDMI (R) destination end, carry out two-way communication.
But the transmission rate of the two-way communication that current HDMI (R) allows is about hundreds of bps.Therefore, the high speed two-way communication of can not between HDMI (R) source end and HDMI (R) destination end, carrying out that bidirection internet agreement (IP) is communicated by letter etc.
Therefore,, the device that comprises patent documentation 1 and 2 devices of being put down in writing carries out two-way IP when communicating by letter when using HDMI (R), and restricted by the data volume of IP communications.If by IP communications mass data, then in communication, produce long time of delay.Therefore, for example in the application of the transmitted in both directions that needs mass data such as compressed image, perhaps in the application that requires high-speed response, be difficult to use HDMI (R).
Therefore, for example can be exclusively used in the pin (pin) that high-speed bidirectional IP communicates by letter with the connector setting of HDMI (R) destination end, can use this dedicated pin to carry out high-speed bidirectional IP communication to HDMI (R) source end.
But,, then can not keep compatibility with existing HDMI (R) if dedicated pin is set to connector based on current HDMI (R).
Therefore, the invention provides and a kind ofly have compatible high-speed bidirectional communication interface with the communication interface of the pixel data of the non-compressed image of one-way transmission (for example HDMI (R)) at high speed.
According to a first aspect of the invention, a kind of communication system comprises: transmitter, in being used for during effective video, use the pixel data of first differential signal to the non-compressed image of the unidirectional transmission of receiver one screen, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during; And receiver, be used to receive first differential signal that sends from transmitter.Transmitter comprises: first converting unit, the transmission data transaction that is used for being different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal; First selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of first converting unit output, and via the secondary signal line selected signal sent to receiver; First control unit is used to control, and makes when sending described transmission signal to receiver, selects described transmission signal by first selected cell, when sending second differential signal to receiver, selects second to form signal by first selected cell; And first decoding unit, be used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data.Receiver comprises: second converting unit, and the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter; Second decoding unit is used to receive second differential signal that sends from transmitter, and second differential signal is decoded into former data; Second selected cell is used for selecting sending signal and second and forms of signal; And second control unit, be used to control, make when receiving described transmission signal, select and receive described transmission signal by second selected cell, when receiving second differential signal, select second to form signal by second selected cell, and form signal by second decoding unit reception second.
According to a first aspect of the invention, provide a kind of communication means that is used to comprise the communication system of transmitter and receiver.Transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, receiver receives from first differential signal of transmitter transmission.Transmitter comprises: first converting unit, the transmission data transaction that is used for being different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal; First selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of first converting unit output, and via the secondary signal line selected signal sent to receiver; And first decoding unit, be used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data.Receiver comprises: second converting unit, and the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter; Second decoding unit is used to receive second differential signal that sends from transmitter, and second differential signal is decoded into former data; And second selected cell, be used for selecting sending signal and second and form of signal.Said method comprising the steps of: control, make when sending described transmission signal to receiver, select described transmission signal, when sending second differential signal, select second to form signal by first selected cell to receiver by first selected cell; And control, make when receiving described transmission signal by receiver, select and receive described transmission signal by second selected cell, when receiving second differential signal by receiver, select second to form signal by second selected cell, and form signal by second decoding unit reception second.
According to a first aspect of the invention, in transmitter, the transmission data transaction that will be different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal, select transmission signal relevant and second one of forming in the signal who is exported, and selected signal is sent to receiver via the secondary signal line with control operation.Here, control, make when sending described transmission signal to receiver, select described transmission signal, when sending second differential signal, select second to form signal to receiver.In addition, receive the 3rd differential signal that sends from receiver, and be decoded into former data.
On the contrary, in receiver, the transmission data transaction that will be different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter, second differential signal that reception sends from transmitter, and be decoded into former data, select to send the signal and second one of forming in the signal.Here, control, make when receiving described transmission signal, select and receive described transmission signal, when receiving second differential signal, select and receive second to form signal.
According to a second aspect of the invention, provide a kind of transmitter.This transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of the unidirectional transmission of receiver one screen, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during.This transmitter comprises: converting unit, the transmission data transaction that is used for being different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal; First selected cell is used for selecting relevant with control operation first to send signal and form of signal from second of converting unit output, and via the secondary signal line selected signal is sent to receiver; First control unit is used to control, and makes when sending the first transmission signal to receiver, selects first to send signal by first selected cell, when sending second differential signal to receiver, selects second to form signal by first selected cell; And decoding unit, be used to receive send from receiver, form signal and the 4th by the 3rd and form the 3rd differential signal that signal constitutes, and the 3rd differential signal is decoded into former data.
Decoding unit can receive by forming signal via the 3rd of secondary signal line transmission and forming the 3rd differential signal that signal constitutes via the 4th of first holding wire transmission; First selected cell can select second one or first of forming in signal and the 3rd composition signal to send signal; When receiving the 3rd differential signal, first control unit can be controlled, and makes to select the 3rd to form signal by first selected cell, and receives the 3rd by decoding unit and form signal.
First selected cell can select second form signal and the 3rd form in the signal one or first send signal with via secondary signal line from the received signal relevant that receiver sends with control operation.When receiving described received signal, first selected cell can receive and export selected received signal.
Decoding unit can receive by forming signal via the 3rd of the 3rd holding wire transmission and forming the 3rd differential signal that signal constitutes via the 4th of the 4th holding wire transmission; Transmitter can also comprise: second selected cell is used for selecting the 3rd composition signal and one that will send to second transmission signal receiver, relevant with control operation; The 3rd selected cell is used for selecting the 4th to form signal and will send to the 3rd of receiver and send of signal; And second control unit, be used to control, make when sending the second transmission signal and the 3rd transmission signal to receiver, select second to send signal by second selected cell, and send signal via the 3rd holding wire with second and send to receiver, select the 3rd to send signal by the 3rd selected cell, and send signal via the 4th holding wire with the 3rd and send to receiver, when receiving the 3rd differential signal, select the 3rd to form signal by second selected cell, form signal thereby receive the 3rd, and select the 4th to form signal, form signal thereby receive the 4th by decoding unit by the 3rd selected cell by decoding unit.
First selected cell can select second form signal or first send signal with via secondary signal line from receiver first received signal that send, relevant with control operation.When having selected first received signal, can receive and export selected first received signal, second selected cell can select the 3rd form signal or second send signal with via the 3rd holding wire from receiver second received signal that send, relevant with control operation.When having selected second received signal, can receive and export selected second received signal.
The first transmission signal and first received signal can be CEC (consumer electronics's control) signals as the control data of transmitter or receiver.Second received signal can be conduct information relevant with the performance of receiver and E-EDID (the EnhancedExtended Display Identification Data that is used for control operation, the enhancement mode expanded display recognition data), convert the data of second differential signal to and the data that obtain by the 3rd differential signal is decoded can be data according to Internet protocol (IP).First control unit can be controlled first selected cell, thereby selects second to form signal after receiving second received signal; Second control unit can be controlled second selected cell and the 3rd selected cell, thereby selects the 3rd to form signal and the 4th composition signal after receiving second received signal.
According to a second aspect of the invention, provide a kind of communication means of transmitter or program of carrying out by the computer of control transmitter of being used for.This transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of the unidirectional transmission of receiver one screen, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during.This transmitter comprises: converting unit, the transmission data transaction that is used for being different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal; Selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of converting unit output, and via the secondary signal line selected signal sent to receiver; And decoding unit, be used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data.Described method or program may further comprise the steps: control, make when sending described transmission signal to receiver, select described transmission signal by selected cell, when sending second differential signal to receiver, select second to form signal by selected cell.
According to a second aspect of the invention, the transmission data transaction that will be different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal.Select first second one of forming in signal that sends signal and exported relevant, and selected signal is sent to receiver via the secondary signal line with control operation.Here, control, make when sending the first transmission signal to receiver, select first to send signal, when sending second differential signal, select second to form signal to receiver.In addition, receive send from receiver, form signal and the 4th by the 3rd and form the 3rd differential signal that signal constitutes, and be decoded into former data.
According to a third aspect of the invention we, provide a kind of receiver.This receiver use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during.This receiver comprises: decoding unit, be used to receive by first forming signal and form second differential signal that signal constitutes from second of transmitter transmission from what transmitter sent, and second differential signal is decoded into former data via the secondary signal line via first holding wire; First selected cell, be used for selecting first form signal with via first holding wire one from transmitter first received signal that send, relevant with control operation; First control unit is used to control, and makes to select and receive first received signal by first selected cell when receiving first received signal, when receiving second differential signal, is selected and receive first by decoding unit to form signal by first selected cell; And converting unit, be used for being different from the transmission data transaction Cheng Youdi three composition signals of pixel data and the 3rd differential signal that the 4th composition signal constitutes, and the 3rd differential signal is sent to transmitter.
Converting unit can be exported the 3rd and form signal and send the 4th composition signal via secondary signal alignment transmitter.The 3rd one of forming the signal that first selected cell can select first received signal or first to form signal and export from converting unit, first control unit can be controlled, make when sending the 3rd differential signal, select the 3rd to form signal by first selected cell, and send the 3rd composition signal to transmitter via first holding wire.
First selected cell can select first to form signal and the 3rd and form in the signal one or first received signal and the transmission signal relevant with control operation one.When having selected the transmission signal, can selected transmission signal be sent to transmitter via first holding wire.
Converting unit can be exported the 3rd and form signal and the 4th composition signal, receiver can also comprise: second selected cell, be used for selecting from the 3rd of converting unit output form signal with via the 3rd holding wire one from transmitter second received signal that send, relevant with control operation; The 3rd selected cell is used for selecting forming signal and of the 3rd received signal that sends from transmitter via the 4th holding wire from the 4th of converting unit output; And second control unit, be used to control, make when receiving second received signal and the 3rd received signal, select and receive second received signal by second selected cell, select and receive the 3rd received signal, when sending the 3rd differential signal by the 3rd selected cell, select the 3rd to form signal by second selected cell, and send to transmitter via the 3rd holding wire, select the 4th to form signal, and send to transmitter via the 4th holding wire by the 3rd selected cell.
First selected cell can be selected first in forming signal or first received signal and will sending to first transmission signal transmitter, relevant with control operation one.When having selected first to send signal, can send selected first to transmitter via first holding wire and send signal, second selected cell can be selected the 3rd in forming signal or second received signal and will sending to second transmission signal transmitter, relevant with control operation one.When having selected second to send signal, can send selected second to transmitter via the 3rd holding wire and send signal.
According to a third aspect of the invention we, provide a kind of communication means of receiver or program of carrying out by the computer of controlling receiver of being used for.This receiver use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during.This receiver comprises: decoding unit, be used to receive by first forming signal and form second differential signal that signal constitutes from second of transmitter transmission from what transmitter sent, and second differential signal is decoded into former data via the secondary signal line via first holding wire; Selected cell, be used for selecting first form signal with via first holding wire one from transmitter received signal that send, relevant with control operation; And converting unit, the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter.Described method or program may further comprise the steps: control, make when receiving described received signal, select and receive described received signal by selected cell, when receiving second differential signal, select and receive first to form signal by decoding unit by selected cell.
According to a third aspect of the invention we, receive by first forming signal and form second differential signal that signal constitutes from second of transmitter transmission from what transmitter sent, and be decoded into former data via the secondary signal line via first holding wire.Select first form signal with via first holding wire from transmitter first received signal that send, relevant with control operation.Here, control, make when receiving first received signal, select and receive first received signal, when receiving second differential signal, select and receive first to form signal.In addition, the transmission data transaction Cheng Youdi three that will be different from pixel data forms signal and the 4th and forms the 3rd differential signal that signal constitutes, and the 3rd differential signal is sent to transmitter,
According to a forth aspect of the invention, provide a kind of communications cable that is used to connect transmitter and receiver.This transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of the unidirectional transmission of receiver one screen, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during.This transmitter comprises: first converting unit, the transmission data transaction that is used for being different from pixel data becomes to form signal and second by first forms second differential signal that signal constitutes, form signal via first holding wire with first and send to receiver, and export second and form signal; First selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of first converting unit output, and via the secondary signal line selected signal sent to receiver; First control unit is used to control, and makes when sending described transmission signal to receiver, selects described transmission signal by first selected cell, when sending second differential signal to receiver, selects second to form signal by first selected cell; And first decoding unit, be used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data.This receiver receives first differential signal that sends from transmitter.This receiver comprises: second converting unit, and the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter; Second decoding unit is used to receive second differential signal that sends from transmitter, and second differential signal is decoded into former data; Second selected cell is used for selecting sending signal and second and forms of signal; And second control unit, be used to control, make when receiving described transmission signal, select and receive described transmission signal by second selected cell, when receiving second differential signal, select second to form signal by second selected cell, and form signal by second decoding unit reception second.This communications cable comprises first holding wire and secondary signal line.Thereby first holding wire and secondary signal line are twisted together and form the twisted-pair feeder differential pair.
According to a forth aspect of the invention, the communications cable that is used to connect transmitter and receiver comprises first holding wire and secondary signal line.Thereby first holding wire and secondary signal line are twisted together and form the twisted-pair feeder differential pair.
According to a fifth aspect of the invention, provide a kind of communication system, comprise the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication.This communication system comprises: but allow the connected a pair of difference transmission lines of connection device.By carrying out LAN communication via the two-way communication of described a pair of difference transmission lines, and described communication system has following function: use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify the connection status of this interface.
According to a sixth aspect of the invention, provide a kind of communication system, comprise the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication.This communication system comprises: but allow the connected two pairs of difference transmission lines of connection device.Carry out LAN communication by one-way communication via described two pairs of difference transmission lines.Described communication system has following function: use the DC bias potential of at least one difference transmission lines to notify the connection status of this interface; Two transmission lines are used for the exchange and the authentication of connection device information at least in the time-multiplexed mode of communicating by letter with LAN.
According to the present invention, can carry out two-way communication.Particularly, for example in the communication interface of the pixel data of the non-compressed image of one-way transmission at high speed and the voice data relevant, can keep carrying out high-speed bidirectional communication in compatible with this image.
In addition, according to the present invention,, can both be formed for the circuit of LAN communication regardless of electrical specification at the DDC definition.As a result, can realize reliable and stable LAN communication with low cost.
Description of drawings
Fig. 1 illustrates the structure of widely used image delivering system.
Fig. 2 illustrates the structure of the image delivering system of embodiments of the present invention.
Fig. 3 illustrates the structure example of HDMI (R) source end and HDMI (R) destination end.
Fig. 4 illustrates the pin assignment of the A type connector of HDMI (R).
Fig. 5 illustrates the pin assignment of the C type connector of HDMI (R).
Fig. 6 more specifically illustrates the structure example of HDMI (R) source end and HDMI (R) destination end.
Fig. 7 more specifically illustrates another structure example of HDMI (R) source end and HDMI (R) destination end.
Fig. 8 illustrates the data structure of E-EDID.
Fig. 9 illustrates the data structure of manufacturer specific (Vender Specific).
Figure 10 is the flow chart that the communication process of being carried out by HDMI (R) source end is shown.
Figure 11 is the flow chart that the communication process of being carried out by HDMI (R) destination end is shown.
Figure 12 is the flow chart that the communication process of being carried out by HDMI (R) source end is shown.
Figure 13 is the flow chart that the communication process of being carried out by HDMI (R) destination end is shown.
Figure 14 more specifically illustrates another structure example of HDMI (R) source end and HDMI (R) destination end.
Figure 15 is the flow chart that the communication process of being carried out by HDMI (R) source end is shown.
Figure 16 is the flow chart that the communication process of being carried out by HDMI (R) destination end is shown.
Figure 17 is the block diagram of structure example that the computer of embodiments of the present invention is shown.
Figure 18 illustrates the circuit diagram of the 1st structure example of communication system that the DC bias potential that uses at least one in two transmission lines comes the connection status of notification interface.
The structure example of the system when Figure 19 illustrates system and is connected to Ethernet (registered trade mark).
Figure 20 illustrates the circuit diagram of the 2nd structure example of communication system that the DC bias potential that uses at least one in two transmission lines comes the connection status of notification interface.
Figure 21 illustrates the two-way communication waveform in the communication system with structure example.
Description of reference numerals
35 HDMI (R) cable, 71 HDMI (R) source end, 72 HDMI (R) destination end, 81 transmitters, 82 receivers, 83 DDC, 84 CEC lines, 85 EDIDROM, 121 switch control units, 124 switch control units, 131 converting units, 132 decoding units, 133 switches, 134 converting units, 135 switches, 136 decoding units, 141 holding wires, 171 switch control units, 172 switch control units, 181 switches, 182 switches, 183 decoding units, 184 converting units, 185 switches, 186 switches, 191 sda lines, 192 scl lines, 400 communication systems, 401 LAN functions expansion HDMI (EH) source end equipment, 411 lan signal transmitter circuits, 412 terminating resistors, 413,414 AC coupling capacitances, 415 lan signal acceptor circuits, 416 subtraction circuits, 421 pull-up resistors, 422 resistance, 423 electric capacity, 424 comparators, 431 pull down resistors, 432 resistance, 433 electric capacity, 434 comparators, 402 EH destination end equipment, 441 lan signal transmitter circuits, 442 terminating resistors, 443,444 AC coupling capacitances, 445 lan signal acceptor circuits, 446 subtraction circuits, 451 pull down resistors, 452 resistance, 453 electric capacity, 454 comparators, 461 chokes, 462,463 resistance, 403 EH cables, 501 keep line, 502 HPD lines, 511, the distolateral terminal in 512 sources, 521,522 destination end side terminals, 600 communication systems, 601 LAN functions expansion HDMI (EH) source end equipment, 611 lan signal transmitter circuits, 612,613 terminating resistors, 614～617 AC coupling capacitances, 618 lan signal acceptor circuits, 620 inverters, 621 resistance, 622 resistance, 623 electric capacity, 624 comparators, 631 pull down resistors, 632 resistance, 633 electric capacity, 634 comparators, 640 NOR doors, 641～644 analog switches, 645 inverters, 646,647 analog switches, 651,652 DDC transceivers, 653,654 pull-up resistors, 602 EH destination end equipment, 661 lan signal transmitter circuits, 662,663 terminating resistors, 664～667 AC coupling capacitances, 668 lan signal acceptor circuits, 671 pull down resistors, 672 resistance, 673 electric capacity, 674 comparators, 681 chokes, 682,683 resistance, 691～694 analog switches, 695 inverters, 696,697 analog switches, 701,702 DDC transceivers, 703 pull-up resistors, 603 EH cables, 801 keep line, 802 HPD lines, 803 scl lines, 804 sda lines, the distolateral terminal in 811～814 sources, 821～824 destination end side terminals
Embodiment
Following with reference to description of drawings illustrative embodiments of the present invention.
Fig. 2 illustrates the structure of the image delivering system of embodiments of the present invention.
Image delivering system comprises digital television receiver 31, amplifier 32, transcriber 33 and digital television receiver 34.HDMI (R) cable 35 that use meets HDMI (R) requirement is connected to amplifier 32 with digital television receiver 31, and uses HDMI (R) cable 36 that meets HDMI (R) requirement that amplifier 32 is connected to transcriber 33.In addition, the LAN cable 37 that is used for Ethernet LAN such as (Ethernet, registered trade marks) is connected to digital television receiver 34 with digital television receiver 31.
In example shown in Figure 2, digital television receiver 31, amplifier 32 and transcriber 33 are held in place in the living room on Fig. 2 left side, digital television receiver 34 are installed in the bedroom that is arranged in the right, living room.
Transcriber 33 for example is DVD player, hdd recorder etc.Transcriber 33 will be used for the pixel data and the voice data decoding of playback of content, and via HDMI (R) cable 36 resulting non-packed pixel data and voice data be offered amplifier 32.
Amplifier 32 can be made of the AV amplifier.Amplifier 32 receives pixel data and voice data from transcriber 33, and amplifies the voice data that is provided as required.In addition, amplifier 32 will offer digital television receiver 31 via HDMI (R) cable 35 from transcriber 33 voice datas that provide, that amplify as required and from the pixel data that transcriber 33 provides.According to pixel data that provides from amplifier 32 and voice data, digital television receiver 31 display images and output sound, thereby playback of content.
In addition, digital television receiver 31 can use HDMI (R) cable 35 to carry out high speed two-way communications such as IP communicates by letter with amplifier 32, and amplifier 32 also can use HDMI (R) cable 36 to carry out high speed two-way communications such as IP communicates by letter with transcriber 33.
That is, for example transcriber 33 can be communicated by letter by carrying out IP with amplifier 32, sends pixel data and voice data through overcompression via HDMI (R) cable 36 to amplifier 32, as the data according to the IP standard.Amplifier 32 can receive pixel data and the voice data through overcompression that sends from transcriber 33.
In addition, communicate by letter by carrying out IP with digital television receiver 31, amplifier 32 can be via HDMI (R) cable 35 to pixel data and the voice data of digital television receiver 31 transmissions through overcompression, as the data according to IP.Digital television receiver 31 can receive pixel data and the voice data through overcompression that sends from amplifier 32.
Like this, digital television receiver 31 can send received pixel data and voice data to digital television receiver 34 via LAN cable 37.In addition, digital television receiver 31 can be with received pixel data and voice data decoding.Then, according to the non-packed pixel data and the voice data that obtain, digital television receiver 31 display images and output sound, thereby playback of content.
Digital television receiver 34 receives pixel data and the voice data that sends from digital television receiver 31 via LAN cable 37 and decodes.Then, according to the non-packed pixel data and the voice data that obtain by decoding, digital television receiver 34 display images and output sound, thereby playback of content.Like this, the digital television receiver 31 and 34 identical or different content item of can resetting simultaneously.
And, when digital television receiver 31 receives when being used to reset as the pixel data of the television program of content and voice data, the voice datas such as 5.1 sound channel surround sounds that if received voice data is a digital television receiver 31 can not decode, then digital television receiver 31 is communicated by letter with the IP of amplifier 32 by carrying out, and received voice data is sent to amplifier 32 via HDMI (R) cable 35.
Amplifier 32 receives from the voice data of digital television receiver 31 transmissions and decodes.Then, amplifier 32 amplifies decoded voice data as required, thereby uses the loud speaker (not shown) that is connected with amplifier 32 to export 5.1 sound channel surround sounds.
Digital television receiver 31 sends voice data via HDMI (R) cable 35 to amplifier 32.In addition, 31 pairs of received pixel datas of digital television receiver are decoded, and come program for playback according to the pixel data that obtains by decoding.
Like this, in image delivering system shown in Figure 2, the electronic installations such as digital television receiver 31, amplifier 32 and transcriber 33 that use HDMI (R) cable 35 to be connected with 36 can use HDMI (R) cable to carry out IP and communicate by letter.Therefore, do not need the LAN cable corresponding with LAN cable shown in Figure 1 17.
In addition, by using LAN cable 37 that digital television receiver 31 is connected to digital television receiver 34, digital television receiver 31 can further will send to digital television receiver 34 from the data that transcriber 33 receives via LAN cable 37 via HDMI (R) cable 36, amplifier 32 and HDMI (R) cable 35.Therefore, do not need respectively LAN cable and the electronic installation corresponding with LAN cable 18 shown in Figure 1 and hub 16.
As shown in Figure 1, in existing image delivering system,, need dissimilar cables according to transmission/reception data and communication means.Therefore, with the wiring complexity of the cable of electronics interconnections.On the contrary, in image delivering system shown in Figure 2, can between the electronic installation that uses HDMI (R) cable to connect, carry out high speed two-way communications such as IP communication.Therefore, can simplify connection between the electronic installation.That is, can further simplify the existing complexity wiring that is used to connect the cable of electronic installation.
Then, Fig. 3 is illustrated in and uses HDMI (R) the source end assembled in HDMI (R) cable each electronic installation connected to one another and HDMI (R) destination end, for example is arranged on HDMI (R) the source end in the amplifier shown in Figure 2 32 and be arranged on the structure example of HDMI (R) destination end in the digital television receiver 31.
Use a HDMI (R) cable 35 that HDMI (R) source end 71 is connected to HDMI (R) destination end 72.Can in the compatibility that keeps with current HDMI (R), use HDMI (R) cable 35 between HDMI (R) source end 71 and HDMI (R) destination end 72, to carry out high-speed bidirectional IP communication.
During as effective video except horizontal blanking interval and vertical blanking interval, during from a vertical synchronizing signal to next vertical synchronizing signal in (following be also referred to as required " during enlivening video "), HDMI (R) source end 71 sends the corresponding differential signal of pixel data with a non-compressed image that shields via a plurality of passages to HDMI (R) destination end 72 uniaxiallies.In addition, at horizontal blanking interval and vertical blanking interval, HDMI (R) source end 71 sends at least differential signal corresponding to the voice data relevant with image and control data, other auxiliary data etc. via a plurality of passages to HDMI (R) destination end 72 uniaxiallies.
That is, HDMI (R) source end 71 comprises transmitter 81.Transmitter 81 for example converts the pixel data of non-compressed image to corresponding differential signal.Then, transmitter 81 uses 3 TMDS passage #0, #1 of HDMI (R) cables 35 and #2 to HDMI (R) destination end 72 these differential signals of uniaxially serial transmission.
In addition, the voice data that transmitter 81 will be relevant with non-compressed image, the control data of needs, other auxiliary data etc. convert corresponding differential signal to, and via 3 TMDS passage #0, #1 and the differential signal of #2 after HDMI (R) the destination end 72 uniaxially serials of using HDMI (R) cable 35 to be connected send conversion.
And transmitter 81 is via TMDS clock passage, to using HDMI (R) cable 35 connected HDMI (R) destination end 72 to send and the synchronous pixel clock of pixel data that will send via 3 TMDS passage #0, #1 and #2.During a pixel clock, send the pixel data of 10 bits via each TMDS passage #i (i=0,1 or 2).
HDMI (R) destination end 72 be received in enliven during the video via a plurality of passages from the end 71 unidirectional transmissions of HDMI (R) source, corresponding to the differential signal of pixel data.In addition, HDMI (R) destination end 72 be received in horizontal blanking interval or vertical blanking interval via a plurality of passages from the end 71 unidirectional transmissions of HDMI (R) source, corresponding to the differential signal of voice data and control data.
That is, HDMI (R) destination end 72 comprises receiver 82.Receiver 82 is via TMDS passage #0, #1 and #2, with the pixel clock that sends from HDMI (R) source end 71 via TMDS clock passage synchronously, receive from use 35 connected HDMI (R) the source end 71 unidirectional transmissions of HDMI (R) cable, corresponding to the differential signal of pixel data with corresponding to the differential signal of voice data and control data.
Except as with pixel clock synchronously from HDMI (R) source end 71 to 3 TMDS passage #0～#2 of the sendaisle of HDMI (R) destination end 72 uniaxially serial transmission pixel datas and voice data and with the TMDS clock passage that acts on the transmission channel of transmitting pixel clock, the transmission channel that comprises HDMI (R) system of HDMI (R) source end 71 and HDMI (R) destination end 72 also comprises and is called as DDC (DisplayData Channel, DDC) 83 and the transmission channel of CEC line 84.
DDC 83 comprises the two signal line (not shown) that are included in HDMI (R) cable 35.When HDMI (R) source end 71 is read enhancement mode expanded display recognition data (E-EDID) from using HDMI (R) cable 35 connected HDMI (R) destination end 72, use DDC 83.
That is, except receiver 82, HDMI (R) destination end 72 also comprises EDIDROM (EDID ROM (read-only memory)) 85, is used for the E-EDID of the storage representation information relevant with performance with the setting of HDMI (R) destination end 72.HDMI (R) source end 71 is read the E-EDID that is stored among the EDIDROM 85 that uses HDMI (R) cable 35 connected HDMI (R) destination end 72 via DDC 83.Then, according to this E-EDID, the setting and the performance of HDMI (R) source end 71 identification HDMI (R) destination end 72, that is, and the picture format of supporting by HDMI (R) destination end 72 (electronic installation that comprises HDMI (R) destination end 72) (attribute (profile)) for example.The example of picture format comprises RGB (red, green, blue), YCbCr 4:4:4 and YCbCr 4:2:2.
Although not shown, same with HDMI (R) destination end 72, HDMI (R) source end 71 can be stored E-EDID and send this E-EDID to HDMI (R) destination end 72 as required.
CEC line 84 comprises a signal line (not shown) that is included in HDMI (R) cable 35.CEC line 84 is used for the two-way communication of the control data between HDMI (R) source end 71 and HDMI (R) destination end 72.
HDMI (R) source end 71 and HDMI (R) destination end 72 can be by carrying out two-way IP communication to the frame that HDMI (R) destination end 72 and HDMI (R) source end 71 send according to IEEE (Institute of Electrical and Electronics Engineers, IEEE) 802.3 respectively via DDC83 or CEC line 84.
In addition, HDMI (R) cable 35 comprises and is called as hot plug (Hot Plug Detect, the holding wire 86 that pin HPD) connects.Use this holding wire 86, HDMI (R) source end 71 and HDMI (R) destination end 72 can detect the electronic installation that makes new advances respectively, be being connected of HDMI (R) destination end 72 and HDMI (R) source end 71.
Then, Fig. 4 and Fig. 5 illustrate the pin assignment of the connector (not shown) that is provided with on HDMI (R) source end 71 or HDMI (R) destination end 72.Connector is connected to HDMI (R) cable 35.
Note, in Fig. 4 and Fig. 5, at the pin numbering that is used for each pin of identification connector shown in the Zuo Lan (PIN hurdle), at the signal name of distributing to shown in the You Lan (Signal Assignment hurdle) at the pin of discerning with the pin numbering shown in the left hurdle of delegation.
Fig. 4 illustrates the pin assignment of the connector that is called as A type (Type-A) of HDMI (R).
Be used to transmit the differential signal TMDS Data #i+ of TMDS passage #i and two differential signal lines of TMDSData #i-are connected to pin (pin with pin numbering 1,4,7) that has been assigned with TMDS Data #i+ and the pin (pin with pin numbering 3,6,9) that has been assigned with TMDS Data#i-.
In addition, the CEC line 84 that is used for the CEC signal of transmitting control data is connected to the pin with pin numbering 13, and the pin with pin numbering 14 is to keep (Reserved) pin.If can use this reservation pin to carry out two-way IP communication, then can keep compatibility with current HDMI (R).Therefore, for the differential signal that will use CEC line 84 and the holding wire that will be connected to pin to transmit with pin numbering 14, the above-mentioned holding wire and the CEC line 84 that will be connected to the pin with pin numbering 14 is twisted together, thereby forms the Shielded Twisted Pair differential pair.In addition, this holding wire and CEC line 84 are grounded to the CEC line 84 that is connected with pin and the earth connection of DDC 83 with pin numbering 17.
And, the holding wire that is used to transmit serial data (SDA) signals such as E-EDID is connected to the pin with pin numbering 16, and is used to transmit the holding wire that is used for the synchronous serial clock of SDA signal transmission (SCL) signal and is connected to the pin with pin numbering 15.DDC 83 shown in Figure 3 by the holding wire that is used to transmit the SDA signal and the holding wire that is used to transmit the SCL signal constitute.
With CEC line 84 with will to be connected to the holding wire of the pin with pin numbering 14 same, the holding wire that will be used to transmit the holding wire of SDA signal and be used to transmit the SCL signal is twisted together, and forms the Shielded Twisted Pair differential pair, and the tolerance sub-signal is by wherein.The holding wire that is used to transmit the SDA signal is grounded to the earth connection that is connected with the pin with pin numbering 17 with the holding wire that is used to transmit the SCL signal.
In addition, the holding wire 86 that is used to transmit the signal of the connection that is used to detect new electronic installation is connected to the pin with pin numbering 19.
Fig. 5 illustrates the pin assignment that is called as C type (Type-C) or mini connector of HDMI (R).
Two signal line as the differential signal line of differential signal TMDS Data#i+ that is used to transmit TMDS passage #i and TMDS Data#i-are connected to pin (pin with pin numbering 2,5,8) that has been assigned with TMDS Data#i+ and the pin (pin with pin numbering 3,6,9) that has been assigned with TMDS Data#i-.
In addition, the CEC line 84 that is used to transmit the CEC signal is connected to the pin with pin numbering 14, and the pin with pin numbering 17 is to keep (Reserved) pin.Same with the situation of Type-A, the holding wire and the CEC line 84 that will be connected to the pin with pin numbering 17 are twisted together, thereby form the Shielded Twisted Pair differential pair.This holding wire and CEC line 84 are grounded to the CEC line 84 that is connected with the pin with pin numbering 13 and the earth connection of DDC83.
And the holding wire that is used to transmit the SDA signal is connected to the pin with pin numbering 16, and the holding wire that is used to transmit the SCL signal is connected to the pin with pin numbering 15.Same with the situation of Type-A, the holding wire that will be used to transmit the holding wire of SDA signal and be used to transmit the SCL signal is twisted together, and forms the Shielded Twisted Pair differential pair, and the tolerance sub-signal is by wherein.The holding wire that is used to transmit the SDA signal is grounded to the earth connection that is connected with the pin with pin numbering 13 with the holding wire that is used to transmit the SCL signal.And the holding wire 86 that is used to transmit the signal of the connection that is used to detect new electronic installation is connected to the pin with pin numbering 19.
Fig. 6 illustrates holding wire via CEC line 84 and the reservation pin that is connected to HDMI (R) connector and uses HDMI (R) the source end 71 that the IP of half-duplex operation method communicates by letter and the structure of HDMI (R) destination end 72.Note, Fig. 6 illustrate with HDMI (R) source end 71 and HDMI (R) destination end 72 between the relevant structure example of half-duplex operation.In addition, in Fig. 6, use the Reference numeral identical, and suitably omit its explanation with the Reference numeral that in Fig. 3, uses.
HDMI (R) source end 71 comprises transmitter 81, switch control unit 121 and timing control unit 122.In addition, transmitter 81 comprises converting unit 131, decoding unit 132 and switch 133.
Converting unit 131 receives to its Tx data that provide.The Tx data are to pass through the data that the two-way IP communication between HDMI (R) source end 71 and HDMI (R) destination end 72 sends to HDMI (R) destination end 72 from HDMI (R) source end 71.For example, the Tx data are pixel data, voice data through overcompression etc.
Converting unit 131 for example comprises differential amplifier.Converting unit 131 becomes to have 2 differential signals of forming signal with the Tx data transaction that is provided.In addition, the differential signal after converting unit 131 will be changed sends to receiver 82 via the holding wire 141 that CEC line 84 is connected with reservation pin with the connector (not shown) that is set to transmitter 81.That is, converting unit 131 is via CEC line 84, and the holding wire of the transmitter 81 that is connected via the CEC line 84 with HDMI (R) cable 35 more precisely provides one of differential signal after constituting conversion to form signal to switch 133.Converting unit 131 is also via holding wire 141, the holding wire of the transmitter 81 that is connected via holding wire 141 more precisely with HDMI (R) cable 35, and another that provides differential signal after constituting conversion to receiver 82 formed signal.
Decoding unit 132 for example comprises differential amplifier.The input of decoding unit 132 is connected with holding wire 141 with CEC line 84.Under the control of timing control unit 122, decoding unit 132 receives the differential signal that sends via CEC line 84 and holding wire 141 from receiver 82,, comprises the composition signal on the CEC line 84 and the differential signal of the composition signal on the holding wire 141 that is.Decoding unit 132 with this differential signal decoding, is exported former Rx data then.Term used herein " Rx data " is meant the data that send to HDMI (R) source end 71 from HDMI (R) destination end 72 by the two-way IP communication between HDMI (R) source end 71 and HDMI (R) destination end 72.The example of Rx data is orders that request sends pixel data and voice data etc.
At the time point that sends data, switch 133 is supplied to the CEC signal from HDMI (R) source end 71, perhaps from converting unit 131, corresponding to the composition signal of the differential signal of Tx data, and at the time point that receives data, switch 133 is supplied to the CEC signal from receiver 82, perhaps from receiver 82, corresponding to the composition signal of the differential signal of Rx data.Under the control of switch control unit 121, switch 133 is optionally exported from the CEC signal of HDMI (R) source end 71, from the CEC signal of receiver 82, corresponding to the composition signal of the differential signal of Tx data or corresponding to the composition signal of the differential signal of Rx data.
Promptly, send the time point of data to HDMI (R) destination end 72 at HDMI (R) source end 71, the CEC signal that provides from HDMI (R) source end 71 and from the composition signal that converting unit 131 provides are provided for switch 133, and via CEC line 84 selected CEC signal and of forming in the signal are sent to receiver 82.
In addition, receive the time point of data at HDMI (R) source end 71 from HDMI (R) destination end 72, switch 133 receives the CEC signal that sends from receiver 82 via CEC line 84 and corresponding to one the composition signal of the differential signal of Rx data.Then, switch 133 offers HDMI (R) source end 71 or decoding unit 132 with received CEC signal or composition signal.
Switch control unit 121 control switchs 133, thus diverter switch 133 is with one in the signal of selecting to offer switch 133.Timing control unit 122 control decoding units 132 receive the timing of differential signal.
In addition, HDMI (R) destination end 72 comprises receiver 82, timing control unit 123 and switch control unit 124.And receiver 82 comprises converting unit 134, switch 135 and decoding unit 136.
Converting unit 134 for example is made of differential amplifier.The Rx data that provided are provided converting unit 134.Under the control of timing control unit 123, converting unit 134 becomes to have 2 differential signals of forming signal with the Rx data transaction that is provided, and the differential signal after will changing sends to transmitter 81 via CEC line 84 and holding wire 141.Promptly, converting unit 134 is via CEC line 84, be arranged on holding wire on the receiver 82 via what the CEC line 84 with HDMI (R) cable 35 was connected more precisely, a composition signal of the differential signal after constituting conversion is provided to switch 135, converting unit 134 is via holding wire 141 simultaneously, be arranged on holding wire on the receiver 82 via what the holding wire 141 with HDMI (R) cable 35 was connected more precisely, another that provides differential signal after constituting conversion to transmitter 81 formed signal.
At the time point that receives data, switch 135 is supplied to the CEC signal from transmitter 81, perhaps from transmitter 81, constitute composition signal corresponding to the differential signal of Tx data, and at the time point that sends data, switch 135 be supplied to from converting unit 134, constitute composition signal, perhaps from the CEC signal of HDMI (R) destination end 72 corresponding to the differential signal of Rx data.Under the control of switch control unit 124, switch 135 optionally exports CEC signal from transmitter 81, from the CEC signal of HDMI (R) destination end 72, constitute corresponding to the composition signal of the differential signal of Tx data or constitute composition signal corresponding to the differential signal of Rx data.
That is, send the time point of data in HDMI (R) destination end 72 to HDMI (R) source end 71, the CEC signal that provides from HDMI (R) destination end 72 and from the composition signal that converting unit 134 provides are provided switch 135.Then, switch 135 sends to transmitter 81 via CEC line 84 with selected CEC signal or composition signal.
In addition, receive the time point of the data that send from HDMI (R) source end 71 in HDMI (R) destination end 72, switch 135 receives the CEC signal that sends from transmitter 81 via CEC line 84 and corresponding to one the composition signal of the differential signal of Tx data.Then, switch 135 offers HDMI (R) destination end 72 or decoding unit 136 with received CEC signal or composition signal.
Decoding unit 136 for example is made of differential amplifier.The input of decoding unit 136 is connected with holding wire 141 with CEC line 84.Decoding unit 136 receives the differential signal that sends via CEC line 84 and holding wire 141 from transmitter 81, that is, and and by the differential signal that signal constitutes of forming on signal and the holding wire 141 formed on the CEC line 84.Decoding unit 136 is decoded into this differential signal former Tx data then and exports former Tx data.
Switch control unit 124 control switchs 135, thus diverter switch 135 is with one in the signal of selecting to offer switch 135.Timing control unit 123 control transformation unit 134 send the timing of differential signal.
In addition, in order to use CEC line 84, to carry out full duplex IP with the holding wire that keeps holding wire 141 that pin is connected, is used to transmit the SDA signal with the holding wire that is used to transmit the SCL signal and communicate by letter, HDMI (R) source end 71 and HDMI (R) destination end 72 for example constitute as shown in Figure 7.Note, in Fig. 7, use the Reference numeral identical, and suitably omit its explanation with the Reference numeral that in Fig. 6, uses.
HDMI (R) source end 71 comprises transmitter 81, switch control unit 121 and switch control unit 171.In addition, transmitter 81 comprises converting unit 131, switch 133, switch 181, switch 182 and decoding unit 183.
At the time point that sends data, switch 181 is supplied to the SDA signal from HDMI (R) source end 71, and receiving the time point of data, this switch is supplied to the SDA signal from receiver 82, perhaps from receiver 82, constitute composition signal corresponding to the differential signal of Rx data.Under the control of switch control unit 171, switch 181 is optionally exported from the SDA signal of HDMI (R) source end 71, from the SDA signal of receiver 82 with constitute corresponding to one in the composition signal of the differential signal of Rx data.
Promptly, receive from the time point of the data of HDMI (R) destination end 72 transmissions at HDMI (R) source end 71, switch 181 receives the SDA signal that sends from receiver 82 via the sda line 191 as the holding wire that is used to transmit the SDA signal, perhaps corresponding to the composition signal of the differential signal of Rx data.Then, switch 181 sends to HDMI (R) source end 71 or decoding unit 183 with SDA signal or the composition signal that receives.
In addition, at the time point of HDMI (R) source end 71 to HDMI (R) destination end 72 transmission data, switch 181 sends the SDA signal that provides from HDMI (R) source end 71 via sda line 191 to receiver 82.Alternately, switch 181 does not send signal to receiver 82.
Receiving the time point of data, switch 182 is supplied to the SCL signal from HDMI (R) source end 71, and at the time point that receives data, this switch be supplied to from receiver 82, constitute composition signal corresponding to the differential signal of Rx data.Under the control of switch control unit 171, switch 182 is optionally exported the SCL signal and is constituted corresponding to one in the composition signal of the differential signal of Rx data.
Promptly, receive from the time point of the data of HDMI (R) destination end 72 transmissions at HDMI (R) source end 71, switch 182 receive via 82 that send as the scl line 192 of the holding wire that is used to transmit the SCL signal from receiver, corresponding to the composition signal of the differential signal of Rx data, and the composition signal that will receive offers decoding unit 183.Alternately, switch 182 received signal not.
In addition, at the time point of HDMI (R) source end 71 to HDMI (R) destination end 72 transmission data, switch 182 sends the SCL signal that provides from HDMI (R) source end 71 via scl line 192 to receiver 82.Alternately, switch 182 does not send signal to receiver 82.
Decoding unit 183 for example comprises differential amplifier.The input of decoding unit 183 is connected with scl line 192 with sda line 191.Decoding unit 183 receives the differential signal that sends via sda line 191 and scl line 192 from receiver 82, that is, and and by the differential signal that signal constitutes of forming on signal and the scl line 192 formed of sda line 191.Decoding unit 183 is decoded into this differential signal former Rx data then and exports former Rx data.
Switch control unit 171 control switchs 181 and 182, thus in diverter switch 181 and 182 each is with one in the signal of selecting to offer them.
In addition, HDMI (R) destination end 72 comprises receiver 82, switch control unit 124 and switch control unit 172.And receiver 82 comprises switch 135, decoding unit 136, converting unit 184, switch 185 and switch 186.
Converting unit 184 for example is made of differential amplifier.The Rx data that provided are provided converting unit 184.Converting unit 184 becomes to form the differential signal that signal constitutes by 2 with the Rx data transaction that is provided.Then, the differential signal after converting unit 184 will be changed sends to transmitter 81 via sda line 191 and scl line 192.That is, converting unit 184 sends a composition signal of the differential signal after constituting conversion to transmitter 81 via switch 185.Converting unit 184 also provides another composition signal of the differential signal after constituting conversion to transmitter 81 via switch 186.
At the time point that sends data, switch 185 be supplied to from converting unit 184, constitute corresponding to the composition signal of the differential signal of Rx data or from the SDA signal of HDMI (R) destination end 72, and at the time point that receives data, switch 185 is supplied to the SDA signal from transmitter 81.Under the control of switch control unit 172, switch 185 is optionally exported from the SDA signal of HDMI (R) destination end 72, from the SDA signal of transmitter 81 with constitute corresponding to one in the composition signal of the differential signal of Rx data.
That is, receive from the time point of the data of HDMI (R) source end 71 transmissions in HDMI (R) destination end 72, switch 185 receives the SDA signal that sends from transmitter 81 via sda line 191.Then, switch 185 offers HDMI (R) destination end 72 with the SDA signal that receives.Alternately, switch 185 received signal not.
In addition, send the time point of data in HDMI (R) destination end 72 to HDMI (R) source end 71, switch 185 sends SDA signal that provides from HDMI (R) destination end 72 or the composition signal that provides from converting unit 184 via sda line 191 to transmitter 81.
Sending the time point of data, switch 186 be supplied to from converting unit 184, constitute composition signal corresponding to the differential signal of Rx data, and at the time point that receives data, this switch is supplied to the SCL signal from transmitter 81.Under the control of switch control unit 172, switch 186 is optionally exported the SCL signal and is constituted corresponding to one in the composition signal of the differential signal of Rx data.
That is, receive from the time point of the data of HDMI (R) source end 71 transmissions in HDMI (R) destination end 72, switch 186 receives the SCL signal that sends from transmitter 81 via scl line 192.Then, switch 186 offers HDMI (R) destination end 72 with the SCL signal that receives.Alternately, switch 186 received signal not.
In addition, at the time point of HDMI (R) destination end 72 to HDMI (R) source end 71 transmission data, switch 186 sends the composition signal that provides from converting unit 184 via scl line 192 to transmitter 81.Alternately, switch 186 does not send signal.
Switch control unit 172 control switchs 185 and 186, thus in diverter switch 185 and 186 each is with one in the signal of selecting to offer them.
And, carry out IP when communicating by letter when HDMI (R) source end 71 and HDMI (R) destination end 72, can carry out half-duplex operation and still be full-duplex communication and be by HDMI (R) source end 71 and HDMI (R) destination end 72 structures shape separately.Therefore, by with reference to the E-EDID that receives from HDMI (R) destination end 72, HDMI (R) source end 71 determines to carry out half-duplex operation, full-duplex communication, still be the two-way communication of the exchange by the CEC signal.
For example, as shown in Figure 8, the E-EDID that is received by HDMI (R) source end 71 comprises basic block and extension blocks.
In the beginning setting of the basic block of E-EDID data by " E-EDID1.3Basic Structure (E-EDID1.3 basic structure) " definition of E-EDID1.3 standard, be thereafter be used to keep with the compatibility of existing EDID, by the timing information of " Preferred timing (regularly preferred) " identification and be different from be used to keep with " the Preferred timing " of the compatibility of existing EDID, by the timing information of " 2nd timing (the 2nd regularly) " identification.
In basic block, " 2nd timing " is indication by the information of the display device name of " Monitor NAME (Monitor Name) " identification and indication the ratio of width to height afterwards is information 4: 3 and 16: 9 o'clock displayable pixel counts, that discerned by " Monitor Range Limits (restriction of monitor scope) ".
In the beginning setting of extension blocks information by the left and right sides loud speaker of " Speaker Allocation (loudspeaker position) " expression, be thereafter: by " VIDEO SHORT (video clip) " recognition data, describe relevant displayable image size, frame rate, interlacing still line by line information and the data of describing the ratio of width to height; By " AUDIO SHORT (audio frequency short-movie) " recognition data, but description is about the information of audio plays codec method, sample frequency, cut-off frequency scope, codec bit number etc.; And by information " Speaker Allocation " identification, relevant left and right sides loud speaker.
In addition, " Speaker Allocation " be afterwards by the definition of each distributors by " Vender Specific (manufacturer is specific) " recognition data, be used to keep with the compatibility of existing EDID by the timing information of " 3rd timing (the 3rd regularly) " identification and be used to keep timing information with the compatibility of existing EDID by " 4rd timing (the 4th regularly) " identification.
Has data structure shown in Figure 9 by " Vender Specifc " recognition data.That is the piece that, comprises the 0th～a N byte by " Vender Specific " recognition data.
Being arranged in by the beginning of " Vender Specific " recognition data the 0th is provided with following information: as the title of the data field of designation data " Vender Specific ", by the information of " Vender Specific tag code (=3) " identification; And the length of expression data " VenderSpecific ", by the information of " Length (=N) " identification.
The expression HDMI (R) number of registration " 0x000C03 ", by " 24bit IEEERegistration Identifier (0x000C03) LSB first " identification information setting at the 1st～3rd.The information of 24 physical addresss of expression destination end equipment (by " A ", " B ", " C ", " D " indication) is arranged on the 4th and the 5th.
In addition, following information setting is at the 6th: the function that expression destination end equipment is supported, by the sign of " Supports-AI " identification; Represent each pixel bit number, by the information of " DC-48bit ", " DC-36bit " and " DC-30bit " identification; Expression destination end equipment whether support the YCbCr4:4:4 image transmission, by the sign of " DC-Y444 " identification; And expression destination end equipment whether support even numbers word visual interface (DVI), by the sign of " DVI-Dual " identification.
And, the highest frequency of expression TMDS pixel clock, by the information setting of " MAX-TMDS-Clock " identification at the 7th.And below sign is arranged on the 8th: the sign that have/does not have, that discerned by " Latency (time delay) " of representing the deferred message of relevant video and sound; The expression whether can carry out full-duplex communication, by " Full Duplex " identification the full duplex sign; And the expression whether can carry out half-duplex operation, by " HalfDuplex " identification the half-duplex sign.
Here, for example, the full duplex sign that is set (for example being set at " 1 ") represents that HDMI (R) destination end 72 has the ability of carrying out full-duplex communication, promptly, HDMI (R) destination end 72 has structure shown in Figure 7, and the full duplex sign of be reset (for example being set at " 0 ") represents that HDMI (R) destination end 72 does not have the ability of carrying out full-duplex communication.
The half-duplex sign that is set (for example being set at " 1 ") represents that HDMI (R) destination end 72 has the ability of carrying out half-duplex operation, promptly, HDMI (R) destination end 72 has structure shown in Figure 6, and the half-duplex sign of be reset (for example being set at " 0 ") represents that HDMI (R) destination end 72 does not have the ability of carrying out half-duplex operation.
Be arranged among by " Vender Specific " recognition data the 9th by the delay data of progressive image of " Video Latency (video time delay) " identification.The delay data audio signal relevant with progressive image, that discerned by " Audio Latency (audio frequency time delay) " is arranged in the 10th.And delay data interlaced picture, that discerned by " Interlaced Video Latency (interlaced video time delay) " is arranged in the 11st.The delay data audio signal relevant with interlaced picture, that discerned by " Interlaced Audio Latency (interlacing audio frequency time delay) " is arranged in the 12nd.
According to the full duplex sign and the half-duplex sign that comprise the E-EDID that receives from HDMI (R) destination end 72, HDMI (R) source end 71 determines to carry out half-duplex operation, full-duplex communication still is by the two-way communication of CEC handshaking.Then, HDMI (R) source end 71 is according to determining that the result carries out and the two-way communication of HDMI (R) destination end 72.
For example, if HDMI (R) source end 71 has structure shown in Figure 6, then HDMI (R) source end 71 can be carried out the half-duplex operation with HDMI shown in Figure 6 (R) destination end 72.But HDMI (R) source end 71 can not be carried out the half-duplex operation with HDMI shown in Figure 7 (R) destination end 72.
Therefore, when comprising the electronic installation energized of HDMI (R) source end 71, HDMI (R) source end 71 begins communication process, and carries out the two-way communication corresponding to the ability of HDMI (R) destination end 72 that is connected with HDMI (R) source end 71.
The communication process that following reference flowchart text shown in Figure 10 is carried out by HDMI shown in Figure 6 (R) source end 71.
In step S11, HDMI (R) source end 71 determines whether that new electronic installation is connected to HDMI (R) source end 71.For example, HDMI (R) source end 71 has connected voltage levvl holding wire 86, that be called as the pin of " hot plug " according to being applied to, and determines whether that the new electronic installation that comprises HDMI (R) destination end 72 is connected thereto.
If in step S11, determine not connect new electronic installation, then do not communicate.Thereby end communication process.
But, if in step S11, determined to connect new electronic installation, switch control unit 121 control switch 133 in step S12 then, switch 133 is switched to the CEC signal of selecting from HDMI (R) source end 71 when sending data, when receiving data, select CEC signal from receiver 82.
In step S13, HDMI (R) source end 71 receives the E-EDID that sends from HDMI (R) destination end 72 via DDC 83.That is, when detecting the connection of HDMI (R) source end 71, HDMI (R) destination end 72 is read E-EDID and the E-EDID that reads is sent to HDMI (R) source end 71 via DDC 83 from EDIDROM 85.Thereby HDMI (R) source end 71 receives the E-EDID that sends from HDMI (R) destination end 72.
In step S14, HDMI (R) source end 71 determines whether to carry out the half-duplex operation with HDMI (R) destination end 72.That is, HDMI (R) source end 71 has determined whether to set half-duplex sign shown in Figure 9 " Half Duplex " with reference to the E-EDID that receives from HDMI (R) destination end 72.For example, if set the half-duplex sign, then HDMI (R) source end 71 determines to use the two-way IP communication of half-duplex operation method, i.e. half-duplex operation.
Can carry out half-duplex operation if in step S14, determine, then HDMI (R) source end 71 sends expression via switch 133 and CEC line 84 to receiver 82 and uses CEC lines 84 and holding wire 141 to carry out the signal that the IP based on the half-duplex operation method communicates by letter in step S15, is used for the channel information of the passage of two-way communication as indicating.
That is, if set the half-duplex sign, then HDMI (R) source end 71 can know that HDMI (R) destination end 72 has structure shown in Figure 6, and can use CEC line 84 and holding wire 141 to carry out half-duplex operation.HDMI (R) source end 71 is to HDMI (R) destination end 72 sendaisle information, thereby notice HDMI (R) destination end 72 will be carried out half-duplex operation.
In step S16, switch control unit 121 control switchs 133, thereby switch 133 is switched to the differential signal of selecting from converting unit 131 corresponding to the Tx data when sending data, when receiving data, select differential signal corresponding to the Rx data from receiver 82.
In step S17, the various piece of HDMI (R) source end 71 utilizes the half-duplex operation method to carry out communicating by letter with the two-way IP of HDMI (R) destination end 72.After this, finish communication process.Promptly, when sending data, converting unit 131 will become differential signal from the Tx data transaction that HDMI (R) source end 71 provides, and a composition signal that constitutes the differential signal after changing is offered switch 133, another be formed signal offer receiver 82 via holding wire 141.Switch 133 will send to receiver 82 via CEC line 84 from the composition signal that converting unit 131 provides.Like this, the differential signal that sends corresponding to the Tx data to HDMI (R) destination end 72 from HDMI (R) source end 71.
When receiving data, that decoding unit 132 receives is 82 that send from receiver, corresponding to the differential signal of Rx data.That is, that switch 133 receives is 82 that send from receiver via CEC line 84, corresponding to the composition signal of the differential signal of Rx data, and received composition signal is offered decoding unit 132.Under the control of timing control unit 122, decoding unit 132 will be formed signal and be decoded into former Rx data via holding wire 141 from the differential signal that signal constitutes of forming that receiver 82 provides by what provide from switch 133.Then, decoding unit 132 is to the former Rx data of HDMI (R) source end 71 outputs.
Like this, HDMI (R) source end 71 and HDMI (R) destination end 72 exchange various data, for example control data, pixel data and voice datas.
But, if in step S14, determine to carry out half-duplex operation, then the various piece of HDMI (R) source end 71 in step S18 by and HDMI (R) destination end 72 between receive and send the CEC signal and carry out two-way communication with HDMI (R) destination end 72.After this, finish communication process.
That is, when sending data, HDMI (R) source end 71 sends the CEC signal via switch 133 and CEC line 84 to receiver 82.When receiving data, HDMI (R) source end 71 receives the CEC signal that sends from receiver 82 via switch 133 and CEC line 84.Like this, HDMI (R) source end 71 and HDMI (R) destination end 72 exchanging control datas.
Like this, HDMI (R) source end 71 is with reference to the half-duplex sign and use CEC line 84 and holding wire 141 carries out half-duplex operation with HDMI (R) destination end 72 that can carry out half-duplex operation.
As mentioned above, select to send data and receive in the data and use CEC line 84 and holding wire 141 carries out half-duplex operation with HDMI (R) destination end 72 by diverter switch 133, promptly use the IP communication of half-duplex operation method, can in the compatibility that keeps with existing HDMI (R), communicate by letter by the execution high-speed bidirectional.
In addition, same with HDMI (R) source end 71, when comprising the electronic installation energized of HDMI (R) destination end 72, HDMI (R) destination end 72 beginning communication process, and carry out and the two-way communication of HDMI (R) source end 71.
The communication process that following reference flowchart text shown in Figure 11 is carried out by HDMI shown in Figure 6 (R) destination end 72.
In step S41, HDMI (R) destination end 72 determines whether that new electronic installation is connected to HDMI (R) destination end 72.For example, HDMI (R) destination end 72 has connected voltage levvl holding wire 86, that be called as the pin of " hot plug " according to being applied to, and has determined whether to connect the new electronic installation that comprises HDMI (R) source end 71.
If in step S41, determine not connect new electronic installation, then do not communicate.After this finish communication process.
But, if in step S41, determined to connect new electronic installation, then switch control unit 124 is in step S42, control switch 135, thereby switch 135 is switched to the CEC signal of selecting from HDMI (R) destination end 72 when sending data, when receiving data, select CEC signal from transmitter 81.
In step S43, HDMI (R) destination end 72 is read E-EDID and the E-EDID that reads is sent to HDMI (R) source end 71 via DDC 83 from EDIDROM 85.
In step S44, HDMI (R) destination end 72 determines whether to receive the channel information that sends from HDMI (R) source end 71.
That is,, send the channel information of expression bi-directional communication channels from HDMI (R) source end 71 according to the ability of HDMI (R) source end 71 and HDMI (R) destination end 72.For example, if HDMI (R) source end 71 has structure shown in Figure 6, then HDMI (R) source end 71 can use CEC line 84 and holding wire 141 to carry out half-duplex operation with HDMI (R) destination end 72.Therefore, HDMI (R) source end 71 sends to HDMI (R) destination end 72 and represents to use CEC line 84 to carry out the channel information that IP communicates by letter with holding wire 141.HDMI (R) destination end 72 receives the channel information that sends from HDMI (R) source end 71 via switch 135 and CEC line 84, and determines to receive channel information.
On the contrary, if HDMI (R) source end 71 does not have the half-duplex operation ability, then not from HDMI (R) source end 71 to HDMI (R) destination end 72 sendaisle information.Therefore, HDMI (R) destination end 72 determines not receive channel information.
If in step S44, determine to receive channel information, then handle and advance to step S45, switch control unit 124 control switchs 135, thereby switch 135 is switched to the differential signal of selecting from converting unit 134 corresponding to the Rx data when sending data, when receiving data, select differential signal corresponding to the Tx data from transmitter 81.
In step S46, the various piece of HDMI (R) destination end 72 utilizes the half-duplex operation method to carry out communicating by letter with the two-way IP of HDMI (R) source end 71.After this, finish communication process.That is, when sending data, under the control of timing control unit 123, converting unit 134 will become differential signal from the Rx data transaction that HDMI (R) destination end 72 provides.Then, the composition signal that converting unit 134 will constitute the differential signal after the conversion offers switch 135, another is formed signal offer transmitter 81 via holding wire 141.Switch 135 will send to transmitter 81 via CEC line 84 from the composition signal that converting unit 134 provides.Like this, the differential signal that sends corresponding to the Rx data to HDMI (R) source end 71 from HDMI (R) destination end 72.
In addition, when receiving data, that decoding unit 136 receives is 81 that send from transmitter, corresponding to the differential signal of Tx data.That is, switch 135 receive 81 that send via CEC line 84 from transmitter, corresponding to the composition signal of the differential signal of Tx data.Then, switch 135 offers decoding unit 136 with received composition signal.Decoding unit 136 will be formed signal and be decoded into former Tx data via holding wire 141 from the differential signal that signal constitutes of forming that transmitter 81 provides by what provide from switch 135.Then, decoding unit 136 is to the former Tx data of HDMI (R) destination end 72 outputs.
Like this, HDMI (R) destination end 72 and HDMI (R) source end 71 exchange various data, for example control data, pixel data and voice datas.
But, if in step S44, determine not receive channel information, then the various piece of HDMI (R) destination end 72 in step S47 by and HDMI (R) source end 71 between receive and send the CEC signal and carry out two-way communication with HDMI (R) source end 71.After this, finish communication process.
That is, when sending data, HDMI (R) destination end 72 sends the CEC signal via switch 135 and CEC line 84 to transmitter 81.When receiving data, HDMI (R) destination end 72 receives the CEC signal that sends from transmitter 81 via switch 135 and CEC line 84.Like this, HDMI (R) destination end 72 and HDMI (R) source end 71 exchanging control datas.
Like this, when receiving channel information, HDMI (R) destination end 72 uses CEC line 84 and holding wire 141 to carry out half-duplex operation with HDMI (R) source end 71.
As mentioned above, select to send data and receive in the data and use CEC line 84 and holding wire 141 carries out half-duplex operation with HDMI (R) source end 71 by diverter switch 135, HDMI (R) destination end 72 can be communicated by letter by the execution high-speed bidirectional in the compatibility that keeps with existing HDMI (R).
In addition, when HDMI (R) source end 71 had structure shown in Figure 7 and HDMI (R) source end 71 executive communications processing, HDMI (R) source end 71 determined according to the full duplex sign that comprises among the E-EDID whether HDMI (R) destination end 72 has the full-duplex communication ability.Then, HDMI (R) source end 71 is carried out two-way communication according to definite result.
The communication process that following reference flowchart text shown in Figure 12 is carried out by HDMI shown in Figure 7 (R) source end 71.
In step S71, HDMI (R) source end 71 determines whether that new electronic installation is connected to HDMI (R) source end 71.If in step S71, determine not connect new electronic installation, then do not communicate.Thereby end communication process.
On the contrary, if in step S71, determined to connect new electronic installation, switch control unit 171 control switch 181 and 182 in step S72 then, make when sending data, the SDA signal that switch 181 is selected from HDMI (R) source end 71, the SCL signal that switch 182 is selected from HDMI (R) source end 71, when receiving data, the SDA signal that switch 181 is selected from receiver 82.
In step S73, switch control unit 121 control switchs 133 switch to the CEC signal of selecting from HDMI (R) source end 71 with switch 133 when sending data, select the CEC signal from receiver 82 when receiving data.
In step S74, HDMI (R) source end 71 receives the E-EDID that the sda line 191 via DDC 83 sends from HDMI (R) destination end 72.That is, when detecting the connection of HDMI (R) source end 71, HDMI (R) destination end 72 is read E-EDID and the E-EDID that reads is sent to HDMI (R) source end 71 via the sda line 191 of DDC 83 from EDIDROM 85.Thereby HDMI (R) source end 71 receives the E-EDID that sends from HDMI (R) destination end 72.
In step S75, HDMI (R) source end 71 determines whether to carry out the full-duplex communication with HDMI (R) destination end 72.That is, HDMI (R) source end 71 has determined whether to set full duplex sign shown in Figure 9 " Full Duplex " with reference to the E-EDID that receives from HDMI (R) destination end 72.For example, if set the full duplex sign, then HDMI (R) source end 71 determines to use the two-way IP communication of duplex communication method, i.e. full-duplex communication.
Can carry out full-duplex communication if in step S75, determine, switch control unit 171 control switch 181 and 182 in step S76 then, thus with switch 181 and 182 switch to when receiving data, select from receiver 82, corresponding to the differential signal of Rx data.
Promptly, when receiving data, switch control unit 171 control switchs 181 and 182 switching, thereby send at receiver 82, constitute in the composition signal corresponding to the differential signal of Rx data, by the form signal of switch 181 selections, by the form signal of switch 182 selections via scl line 192 transmissions via sda line 191 transmissions.
From HDMI (R) destination end 72 after HDMI (R) source end 71 has sent E-EDID, do not use the sda line 191 and the scl line 192 that constitute DDC 83, that is, do not carry out transmission and reception via the SDA and the SCL signal of sda line 191 and scl line 192.Therefore, by diverter switch 181 and 182, can be with the transmission line of sda line 191 and scl line 192 as the Rx data of full-duplex communication.
In step S77, the channel information that is used for the passage of two-way communication as indicating, HDMI (R) source end 71 sends expression via switch 133 and CEC line 84 to receiver 82 and uses the signal of being made up of CEC line 84 and holding wire 141 to communicating by letter with the IP to carrying out based on duplex communication method that is made up of sda line 191 and scl line 192.
Promptly, if set the full duplex sign, then HDMI (R) source end 71 can know that HDMI (R) destination end 72 has structure shown in Figure 7, and can use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 to carrying out full-duplex communication.Thereby, to carry out full-duplex communication in order to notify HDMI (R) destination end 72, HDMI (R) source end 71 is to HDMI (R) destination end 72 sendaisle information.
In step S78, switch control unit 121 control switchs 133, thus switch 133 switched to the differential signal of when sending data, selecting from converting unit 131 corresponding to the Tx data.That is, switch control unit 121 diverter switches 133, make switch 133 select 131 that provide from converting unit, corresponding to the composition signal of the differential signal of Tx data.
In step S79, the various piece of HDMI (R) source end 71 utilizes duplex communication method to carry out communicating by letter with the two-way IP of HDMI (R) destination end 72.After this, finish communication process.That is, when sending data, converting unit 131 will become differential signal from the Tx data transaction that HDMI (R) source end 71 provides.Then, the composition signal that converting unit 131 will constitute the differential signal after the conversion offers switch 133, another is formed signal offer receiver 82 via holding wire 141.Switch 133 will offer receiver 82 via CEC line 84 from the composition signal that converting unit 131 provides.Like this, the differential signal that sends corresponding to the Tx data to HDMI (R) destination end 72 from HDMI (R) source end 71.
In addition, when receiving data, that decoding unit 183 receives is 82 that send from receiver, corresponding to the differential signal of Rx data.That is, switch 181 receive 82 that send via sda line 191 from receiver, corresponding to the composition signal of the differential signal of Rx data.Then, switch 181 offers decoding unit 183 with received composition signal.In addition, switch 182 receive 82 that send via scl line 192 from receiver, form signal corresponding to another of the differential signal of Rx data.Then, switch 182 offers decoding unit 183 with received composition signal.Decoding unit 183 will be decoded into former Rx data by the differential signal that signal constitutes of forming that provides from switch 181 and 182, and to the former Rx data of HDMI (R) source end 71 outputs.
Like this, HDMI (R) source end 71 and HDMI (R) destination end 72 exchange various data, for example control data, pixel data and voice datas.
But, if in step S75, determine to carry out full-duplex communication, then the various piece of HDMI (R) source end 71 in step S80 by and HDMI (R) destination end 72 between receive and send the CEC signal and carry out two-way communication with HDMI (R) destination end 72.After this, finish communication process.
That is, when sending data, HDMI (R) source end 71 sends the CEC signal via switch 133 and CEC line 84 to receiver 82.When receiving data, HDMI (R) source end 71 receives the CEC signal that sends from receiver 82 via switch 133 and CEC line 84.Like this, HDMI (R) source end 71 and HDMI (R) destination end 72 exchanging control datas.
Like this, HDMI (R) source end 71 with reference to the full duplex sign and use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 right, carry out full-duplex communication with HDMI (R) destination end 72 that can carry out full-duplex communication.
As mentioned above, by diverter switch 133,181 and 182 select to send data and receive data and use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 right, carry out full-duplex communication with HDMI (R) destination end 72, can in the compatibility that keeps with existing HDMI (R), communicate by letter by the execution high-speed bidirectional.
Same with the situation of HDMI (R) destination end 72 shown in Figure 6, when HDMI (R) destination end 72 has structure shown in Figure 7, HDMI (R) thus the two-way communication of carrying out with HDMI (R) source end 71 is handled in destination end 72 executive communications.
The communication process that following reference flowchart text shown in Figure 13 is carried out by HDMI shown in Figure 7 (R) destination end 72.
In step S111, HDMI (R) destination end 72 determines whether that new electronic installation is connected to HDMI (R) destination end 72.If in step S111, determine not connect new electronic installation, then do not communicate.Therefore finish communication process.
On the contrary, if in step S111, determined to connect new electronic installation, then switch control unit 172 control switch 185 and switching of 186 in step S112, make when sending data, the SDA signal that switch 185 is selected from HDMI (R) destination end 72, when receiving data, the SDA signal that switch 185 is selected from transmitter 81, the SCL signal that switch 186 is selected from transmitter 81.
In step S113, switch control unit 124 control switchs 135, thus switch 135 is switched to the CEC signal of selecting from HDMI (R) destination end 72 when sending data, when receiving data, select CEC signal from transmitter 81.
In step S114, HDMI (R) destination end 72 is read E-EDID and the E-EDID that reads is sent to HDMI (R) source end 71 via the sda line 191 of switch 185 and DDC 83 from EDIDROM 85.
In step S115, HDMI (R) destination end 72 determines whether to receive the channel information that sends from HDMI (R) source end 71.
That is,, send the channel information of expression bi-directional communication channels from HDMI (R) source end 71 according to the ability of HDMI (R) source end 71 and HDMI (R) destination end 72.For example, when HDMI (R) source end 71 had structure shown in Figure 7, HDMI (R) source end 71 can be carried out full-duplex communication with HDMI (R) destination end 72.Therefore, HDMI (R) source end 71 sends expression to HDMI (R) destination end 72 and uses the channel information of being made up of CEC line 84 and holding wire 141 to communicating by letter with the IP to carrying out based on duplex communication method that is made up of sda line 191 and scl line 192.Therefore, HDMI (R) destination end 72 receives the channel information that sends from HDMI (R) source end 71 via switch 135 and CEC line 84, and determines to receive channel information.
But, if HDMI (R) source end 71 does not have the full-duplex communication ability, then not from HDMI (R) source end 71 to HDMI (R) destination end 72 sendaisle information.Therefore, HDMI (R) destination end 72 determines not receive channel information.
If in step S115, determine to receive channel information, then handle and advance to step S116, switch control unit 172 control switchs 185 and 186 switching make switch 185 and 186 select the differential signal corresponding to the Rx data from converting unit 184 when sending data.
In step S117, switch control unit 124 control switchs 135, make switch 135 when receiving data, select from transmitter 81, corresponding to the differential signal of Tx data.
In step S118, the various piece of HDMI (R) destination end 72 utilizes duplex communication method to carry out communicating by letter with the two-way IP of HDMI (R) source end 71.After this, finish communication process.That is, when sending data, converting unit 184 will become differential signal from the Rx data transaction that HDMI (R) destination end 72 provides, and a composition signal that constitutes the differential signal after changing is offered switch 185, another be formed signal offer switch 186. Switch 185 and 186 will send to transmitter 81 via sda line 191 and scl line 192 from the composition signal that converting unit 184 provides.Like this, the differential signal that sends corresponding to the Rx data to HDMI (R) source end 71 from HDMI (R) destination end 72.
In addition, when receiving data, that decoding unit 136 receives is 81 that send from transmitter, corresponding to the differential signal of Tx data.That is, switch 135 receive 81 that send via CEC line 84 from transmitter, corresponding to the composition signal of the differential signal of Tx data.Then, switch 135 offers decoding unit 136 with received composition signal.Decoding unit 136 will be formed signal and be decoded into former Tx data via holding wire 141 from the differential signal that signal constitutes of forming that transmitter 81 provides by what provide from switch 135.Then, decoding unit 136 is to the former Tx data of HDMI (R) destination end 72 outputs.
Like this, HDMI (R) destination end 72 and HDMI (R) source end 71 exchange various data, for example control data, pixel data and voice datas.
But, if in step S115, determine not receive channel information, then the various piece of HDMI (R) destination end 72 in step S119 by and HDMI (R) source end 71 between receive and send the CEC signal and carry out two-way communication with HDMI (R) source end 71.After this, finish communication process.
Like this, when receiving channel information, HDMI (R) destination end 72 use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 right, carry out full-duplex communication with HDMI (R) source end 71.
As mentioned above, by diverter switch 135,185 and 186 select to send data and receive data and use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 right, carry out full-duplex communication with HDMI (R) source end 71, HDMI (R) destination end 72 can be communicated by letter by the execution high-speed bidirectional in the compatibility that keeps with existing HDMI (R).
Although in the structure of HDMI shown in Figure 7 (R) source end 71, converting unit 131 is connected with holding wire 141 with CEC line 84, and decoding unit 183 is connected with scl line 192 with sda line 191, but can use also that decoding unit 183 is connected with holding wire 141 with CEC line 84, structure that converting unit 131 and sda line 191 are connected with scl line 192.
In this case, switch 181 and 182 is connected respectively to CEC line 84 and holding wire 141. Switch 181 and 182 is also connected to decoding unit 183.Switch 133 is connected to sda line 191.Switch 133 is also connected to converting unit 131.
Equally, in the structure of HDMI shown in Figure 7 (R) destination end 72, converting unit 184 can be connected with holding wire 141 with CEC line 84, and decoding unit 136 can be connected with scl line 192 with sda line 191.In this case, switch 185 and 186 is connected respectively to CEC line 84 and holding wire 141. Switch 185 and 186 is also connected to converting unit 184.Switch 135 is connected to sda line 191.Switch 135 is also connected to decoding unit 136.
And in Fig. 6, CEC line 84 and holding wire 141 can be used as sda line 191 and scl line 192.Promptly, the converting unit 134 of the converting unit 131 of HDMI (R) source end 71 and decoding unit 132 and HDMI (R) destination end 72 can be connected with scl line 192 with sda line 191 with decoding unit 136, communicates by letter thereby HDMI (R) source end 71 uses the half-duplex operation method to carry out IP with HDMI (R) destination end 72.And, in this case, can use the reservation pin of the connector that has connected holding wire 141 to come the connection of detection. electronics.
And each in HDMI (R) source end 71 and HDMI (R) destination end 72 can have half-duplex operation ability and full-duplex communication ability.In this case, HDMI (R) source end 71 can use half-duplex operation method or duplex communication method to carry out IP communication according to the ability of the electronic installation that is connected with HDMI (R) destination end 72.
If each in HDMI (R) source end 71 and HDMI (R) destination end 72 all has half-duplex operation ability and full-duplex communication ability, then HDMI (R) source end 71 and HDMI (R) destination end 72 for example constitute as shown in figure 14.Note, in Figure 14, use the Reference numeral identical, and suitably omit its explanation with the Reference numeral that in Fig. 6 or Fig. 7, uses.
HDMI shown in Figure 14 (R) source end 71 comprises transmitter 81, switch control unit 121, timing control unit 122 and switch control unit 171.Transmitter 81 comprises converting unit 131, decoding unit 132, switch 133, switch 181, switch 182 and decoding unit 183.That is, HDMI (R) source end 71 shown in Figure 14 has timing control unit shown in Figure 6 122 and decoding unit 132 is appended the structure that is set to HDMI shown in Figure 7 (R) source end 71.
In addition, HDMI (R) destination end 72 shown in Figure 14 comprises receiver 82, timing control unit 123, switch control unit 124 and switch control unit 172.Receiver 82 comprises converting unit 134, switch 135, decoding unit 136, converting unit 184, switch 185 and switch 186.That is, HDMI (R) destination end 72 shown in Figure 14 has timing control unit shown in Figure 6 123 and converting unit 134 is appended the structure that is set to HDMI shown in Figure 7 (R) destination end 72.
The communication process that HDMI (R) source end 71 shown in Figure 14 and HDMI (R) destination end 72 are carried out below is described.
At first with reference to flowchart text shown in Figure 15 communication process by 71 execution of HDMI shown in Figure 14 (R) source end.Because the processing of carrying out is identical with the processing of carrying out respectively, therefore do not carry out repeat specification in step S71 shown in Figure 12～S74 in step S151～S154.
In step S155, HDMI (R) source end 71 determines whether to carry out the full-duplex communication with HDMI (R) destination end 72.That is, HDMI (R) source end 71 has determined whether to set full duplex sign shown in Figure 9 " Full Duplex " with reference to the E-EDID that receives from HDMI (R) destination end 72.
Can carry out full-duplex communication if in step S155, determine, be that Fig. 7 or HDMI (R) destination end 72 shown in Figure 14 are connected to HDMI (R) source end 71, switch control unit 171 control switch 181 and 182 in step S156 then, thus with switch 181 and 182 switch to when receiving data, select from receiver 82, corresponding to the differential signal of Rx data.
But if determine to carry out full-duplex communication in step S155, then in step S157, HDMI (R) source end 71 determines whether to carry out half-duplex operation.That is, HDMI (R) source end 71 has determined whether to set half-duplex sign shown in Figure 9 " Half Duplex " with reference to the E-EDID that receives.In other words, HDMI (R) source end 71 determines whether that HDMI shown in Figure 6 (R) destination end 72 is connected to HDMI (R) source end 71.
If in step S157, determine to carry out half-duplex operation, if perhaps in step S156, switched switch 181 and 182, then HDMI (R) source end 71 in step S158 via switch 133 and CEC line 84 to receiver 82 sendaisle information.
Here, if determine to carry out full-duplex communication in step S155, then HDMI (R) destination end 72 has the full-duplex communication ability.Therefore, as channel information, HDMI (R) source end 71 via switch 133 and CEC line 84 to receiver 82 send expression use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 to carrying out the signal that IP communicates by letter.
But if determine to carry out half-duplex operation in step S157, then HDMI (R) has the half-duplex operation ability although destination end 72 does not have the full-duplex communication ability.Therefore, as channel information, HDMI (R) source end 71 sends expression with CEC line 84 to receiver 82 via switch 133 and uses CEC line 84 to carry out the signal that IP communicates by letter with holding wire 141.
In step S159, switch control unit 121 control switchs 133, thereby with switch 133 switch to when sending data, select from converting unit 131, corresponding to the differential signal of Tx data, when receiving data, select 82 that send from receiver, corresponding to the differential signal of Rx data.When HDMI (R) source end 71 and HDMI (R) destination end 72 are carried out full-duplex communication, the differential signal that when HDMI (R) source end 71 receives data, does not send corresponding to the Rx data from receiver 82 via CEC line 84 and holding wire 141.Therefore, do not provide differential signal corresponding to the Rx data to decoding unit 132.
In step S160, the various piece of HDMI (R) source end 71 carries out communicating by letter with the two-way IP of HDMI (R) destination end 72.After this, finish communication process.
That is, when HDMI (R) source end 71 and HDMI (R) destination end 72 are carried out full-duplex communication and half-duplex operation, when sending data, converting unit 131 will become differential signal from the Tx data transaction that HDMI (R) source end 71 provides.Then, the composition signal that converting unit 131 will constitute the differential signal after the conversion sends to receiver 82 via switch 133 and CEC line 84, another is formed signal send to receiver 82 via holding wire 141.
When HDMI (R) source end 71 and HDMI (R) destination end 72 were carried out full-duplex communication, when receiving data, that decoding unit 183 receives was 82 that send from receiver, corresponding to the differential signal of Rx data, and received differential signal is decoded into former Rx data.Then, decoding unit 183 is to the former Rx data of HDMI (R) source end 71 outputs.
On the contrary, when HDMI (R) source end 71 and HDMI (R) destination end 72 are carried out half-duplex operation, when receiving data, decoding unit 132 under the control of timing control unit 122, receives from receiver 82 transmissions, corresponding to the differential signal of Rx data.Then, decoding unit 132 is decoded into received differential signal former Rx data and exports former Rx data to HDMI (R) source end 71.
Like this, HDMI (R) source end 71 and HDMI (R) destination end 72 exchange various data, for example control data, pixel data and voice datas.
But if determine to carry out half-duplex operation in step S157, then the CEC signal carries out the various piece of HDMI (R) source end 71 and the two-way communication of HDMI (R) destination end 72 by receiving and send via CEC line 84 in step S161.After this, finish communication process.
Like this, HDMI (R) source end 71 is with reference to full duplex sign and half-duplex sign, according to the ability as HDMI (R) destination end 72 of communication counterpart, carries out full-duplex communication or half-duplex operation with HDMI (R) destination end 72.
As mentioned above, by coming diverter switch 133,181 and 182 according to ability as HDMI (R) destination end 72 of communication counterpart, select sending data and to receive data and carry out full-duplex communication or half-duplex operation, can in the compatibility that keeps with existing HDMI (R), communicate by letter by the execution high-speed bidirectional with HDMI (R) destination end 72.
The communication process that following reference flowchart text shown in Figure 16 is carried out by HDMI shown in Figure 14 (R) destination end 72.Because the processing of carrying out is identical with the processing of carrying out respectively, therefore do not carry out repeat specification in step S111 shown in Figure 13～S114 in step S191～S194.
In step S195, HDMI (R) destination end 72 receives the channel information that sends from HDMI (R) source end 71 via switch 135 and CEC line 84.If HDMI (R) the source end 71 that is connected with HDMI (R) destination end 72 had not both had the full-duplex communication ability, do not have the half-duplex operation ability yet, then not from HDMI (R) source end 71 to HDMI (R) destination end 72 sendaisle information.Therefore, HDMI (R) destination end 72 receive path information not.
In step S196, HDMI (R) destination end 72 determines whether to carry out full-duplex communication according to received channel information.For example, if HDMI (R) destination end 72 receive expression use by CEC line 84 and holding wire 141 form to form by sda line 191 and scl line 192 to carrying out the channel information that IP communicates by letter, then HDMI (R) destination end 72 determines to carry out full-duplex communication.
If in step S196, determine to carry out full-duplex communication, switch control unit 172 control switch 185 and 186 in step S197 then, with switch 185 and 186 switch to when sending data, select from converting unit 184, corresponding to the differential signal of Rx data.
But if determine not carry out full-duplex communication in step S196, then HDMI (R) destination end 72 determines whether to carry out half-duplex operation according to received channel information in step S198.For example, use CEC line 84 to carry out the channel information that IP communicates by letter with holding wire 141 if HDMI (R) destination end 72 receives expression, then HDMI (R) destination end 72 determines to carry out half-duplex operation.
If in step S198, determine to carry out half-duplex operation, perhaps switch 185 and 186 is switched in step S197, switch control unit 124 control switch 135 in step S199 then, thereby with switch 135 switch to when sending data, select from converting unit 134, corresponding to the differential signal of Rx data, when receiving data, select from transmitter 81, corresponding to the differential signal of Tx data.
Note, if HDMI (R) source end 71 and HDMI (R) destination end 72 are carried out full-duplex communication, when then sending data at HDMI (R) destination end 72 places, the differential signal that sends corresponding to the Rx data to transmitter 81 from converting unit 134 not.Therefore, do not provide differential signal corresponding to the Rx data to switch 135.
In step S200, the various piece of HDMI (R) destination end 72 carries out communicating by letter with the two-way IP of HDMI (R) source end 71.After this, finish communication process.
That is, if HDMI (R) destination end 72 is carried out full-duplex communication with HDMI (R) source end 71, then when sending data, converting unit 184 will become differential signal from the Rx data transaction that HDMI (R) destination end 72 provides.Then, the composition signal that converting unit 184 will constitute the differential signal after the conversion offers transmitter 81 via switch 185 and sda line 191, another is formed signal offer transmitter 81 via switch 186 and scl line 192.
In addition, if HDMI (R) destination end 72 is carried out half-duplex operation with HDMI (R) source end 71, then when sending data, converting unit 134 will become differential signal from the Rx data transaction that HDMI (R) destination end 72 provides.Then, the composition signal that converting unit 134 will constitute the differential signal after the conversion sends to transmitter 81 via switch 135 and CEC line 84, another is formed signal send to transmitter 81 via holding wire 141.
And if HDMI (R) destination end 72 is carried out full-duplex communication and half-duplex operation with HDMI (R) source end 71, then when receiving data, that decoding unit 136 receives is 81 that send from transmitter, corresponding to the differential signal of Tx data.Then, decoding unit 136 is decoded into received differential signal former Tx data and exports former Tx data to HDMI (R) destination end 72.
But, if in step S198, determine not carry out half-duplex operation, promptly, if for example there is not sendaisle information, then the CEC signal carries out the various piece of HDMI (R) destination end 72 and the two-way communication of HDMI (R) source end 71 by receiving and send with HDMI (R) source end 71 in step S201.After this, finish communication process.
Like this, HDMI (R) destination end 72 is according to received channel information, promptly according to the ability as HDMI (R) the source end 71 of communication counterpart, carries out full-duplex communication or half-duplex operation.
As mentioned above, by coming diverter switch 135,185 and 186 according to the ability of HDMI (R) source end 71, to select the transmission data and to receive data and carry out full-duplex communication or half-duplex operation, can be in the compatibility of maintenance and existing HDMI (R), select more suitably communication means, carry out high-speed bidirectional communication.
In addition, comprise being twisted together to form the shielding differential pair and be connected to the CEC line 84 and the holding wire 141 of ground wire and be twisted together by use and form shielding differential pair and be connected to the sda line 191 of ground wire and HDMI (R) cable 35 of scl line 192, HDMI (R) source end 71 is connected to HDMI (R) destination end 72, can be in the compatibility that keeps with existing HDMI (R) cable execution communicate by letter based on the high-speed bidirectional IP of half-duplex operation method or duplex communication method.
As mentioned above, select in one or more data item any one as sending data.Selected data are sent to communication counterpart via the prearranged signal line.Selection any one from one or more data item that communication counterpart sends be as receiving data, and receive selected data.Thereby can be in the compatibility of maintenance and HDMI (R), promptly, the pixel data that allows non-compressed image from HDMI (R) source end 71 in the high speed one-way transmission of HDMI (R) destination end 72, between HDMI (R) source end 71 and HDMI (R) destination end 72, carries out high-speed bidirectional IP via HDMI (R) cable 35 and communicates by letter.
The result, has for example DLNA (Digital Living NetworkAlliance if assembled the source end equipment (transcriber 33 electronic installations such as grade for example shown in Figure 2) of HDMI (R) source end 71, DLNA) server capability, and the destination end equipment (electronic installations such as digital television receiver 31 for example shown in Figure 2) of having assembled HDMI (R) destination end 72 comprises Ethernet LAN communication interfaces such as (registered trade marks), then can be by using two-way IP communication that the electronic installation (for example amplifier 32) that directly connects or connect via HDMI (R) cable carry out and transmitting content from source end equipment to destination end equipment via HDMI (R) cable.In addition, the content from source end equipment can be sent to another equipment (digital television receiver 34 for example shown in Figure 2) that is connected with the LAN communication interface of destination end equipment from destination end equipment.
And, utilize HDMI (R) source end 71 to communicate by letter with two-way IP between HDMI (R) destination end 72, can by 35 interconnection of HDMI (R) cable, assembled the source end device of HDMI (R) source end 71 and assembled between the destination end device of HDMI (R) destination end 72 and exchanged control command and response at high speed.Therefore, can between device, realize fast-response control.
As described below, can realize above-mentioned a series of processing by specialized hardware or software.When realizing above-mentioned a series of processing by software, the program that forms this software for example is installed in the microcomputer of control HDMI (R) source end 71 and HDMI (R) destination end 72.
Figure 17 illustrate an execution mode, have a configuration example of computer of program that is used to carry out above-mentioned a series of processing that is installed in wherein.
Program can be recorded in advance be assembled in the computer, in the recording medium such as EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM) 305 or ROM 303.
Alternately, program can be provisionally or is for good and all stored (record) in detachable recording medium such as compact disc read-only memory (CD-ROM), optomagnetic (MO) dish, digital universal disc (DVD), disk or semiconductor memory.This detachable recording medium can provide with the form of so-called software kit.
Note, except from above-mentioned detachable recording medium is installed to the computer, program wirelessly can be sent to computer from download site via the artificial satellite that is used for digital satellite broadcasting, perhaps can be sent to computer wiredly via networks such as LAN or the Internets.Thereby computer can use input/output interface 306 to receive the program that is transmitted, and this program is installed among the built-in EEPROM 305.
Computer has been assembled CPU (CPU) 302.Input/output interface 306 is connected with CPU 302 via bus 301.CPU 302 the program among read-only memory (ROM) 303 or the EEPROM 305 of will the being stored in random-access memory (ram) 304 of packing into.Then, CPU 302 carries out this program.Like this, the processing that CPU 302 carries out according to above-mentioned flow chart, the perhaps processing of in the structure shown in the above-mentioned block diagram, carrying out.
In this manual, illustrate that the treatment step of the program that makes computer carry out various processing is not necessarily carried out according to the order shown in the flow chart, the processing (for example parallel processing or object-based processing) that can comprise concurrently or carry out independently.
In addition, can by a computer come executive program or in the mode of disperseing by a plurality of executive programs.
The present invention is applicable to the communication interface that comprises transmitter and receiver, wherein, transmitter is in during as effective video except horizontal blanking interval and vertical blanking interval, during from a vertical synchronizing signal to next vertical synchronizing signal, to the pixel data corresponding differential signal of receiver uniaxially transmission with the non-compressed image of a screen, receiver receives the differential signal that sends via a plurality of passages via a plurality of passages.
In the present invention, control data is selected regularly by coming as required between HDMI (R) source end 71 and HDMI (R) destination end 72, differential signal receives regularly and differential signal sends regularly, carries out two-way IP communication.But, can use the agreement outside the IP to carry out two-way communication.
Embodiments of the present invention are not limited to above-mentioned execution mode, can carry out various changes under the situation that does not break away from the spirit and scope of the present invention.
According to above-mentioned execution mode, can carry out two-way communication.Particularly, can be in the communication interface of pixel data that can transmit non-compressed image and the voice data relevant with this pixel data, keeping carrying out high-speed bidirectional communication in compatible.
In addition, for interactive TV programs, senior Long-distance Control, electronic program guides etc. are provided to the user, a lot of audio/video devices have the LAN communication capacity, but some technology wherein are identical with the technology that illustrates previously.
Means as be used for forming network between audio/video device for example can provide following selection: the installation of client cables such as CAT5, radio communication and power line communication.
But client cables makes the connection between the device become complicated.The shortcoming that radio communication and power line communication have is the modulation circuit of needed complexity and transceiver price height.
Therefore, above-mentioned execution mode has illustrated in the technology that does not increase the LAN communication capacity under the situation of the new connector electrode of HDMI increase.
HDMI is to use a cable to carry out the authentication of the exchange of the transmission of video data and voice data, connection device information, connection device information and the interface of communicating by letter of device control data.Therefore, if increase the LAN communication capacity to HDMI, then HDMI has significant advantage, communicates by letter thereby can carry out LAN under the situation of not using client cables and radio communication etc.
Notice that in the illustrated technology of above-mentioned execution mode, the difference transmission lines that is used for LAN communication also is used for the exchange of connection device information and communicating by letter of authentication and device control data.
In HDMI, for the DDC of the exchange of carrying out connection device information and authentication and the CEC that communicates by letter that carries out device control data, the parasitic capacitance of the electrical characteristics of connection device and impedance are subjected to strict restriction.
More particularly, requiring the DDC terminal parasitic capacitance of equipment is 50pF or lower.Require the DDC terminal when output LOW (low), to be connected to ground GND, and moving power supply in the impedance with about 2k Ω under output HIGH (height) state with 200 Ω or lower impedance.
In addition, stable for the LAN communication that makes transmit high-speed signals, require transmission/reception terminal at least in high-frequency range with about 100 Ω terminations.
Figure 19 illustrate transmitter 404 and receiver 405 constantly AC be coupled to the state of the DDC line of existing HDMI source end equipment 401 and existing HDMI destination end equipment 402.
In order to satisfy DDC parasitic capacitance restriction, be increased to the AC that LAN transmitter on the DDC line and acceptor circuit need have via enough little electric capacity and be coupled.Therefore, lan signal is greatly decayed, thus distortion.Therefore, being used for the transmission of correcting distortion and receiving circuit becomes complicated and high price.
In addition, may disturb LAN communication in the conversion of DDC communication period between HIGH and LOW state.That is, in the DDC communication period, LAN may be inoperative.
Therefore, the more preferably communication system of execution mode below is described.This communication system is characterised in that, basically using a cable to carry out in the interface of communicating by letter of the exchange of the transfer of data of video data and voice data, connection device information and authentication, device control data and LAN communication, by carrying out LAN communication via the two-way communication of a pair of difference transmission lines, and use the DC bias potential of at least one transmission line to notify the connection status of this interface.
Different from the embodiment described above, in following technology, not necessarily need selected cell.
Figure 18 illustrates the circuit diagram of the 1st structure example of communication system that the DC bias potential that uses at least one transmission line comes the connection status of notification interface.
Figure 19 illustrates the example of the system that is provided with Ethernet (registered trade mark).
As shown in figure 18, communication system 400 comprises LAN function expansion HDMI (hereinafter referred to as " EH ") source end equipment 401, EH destination end equipment 402, is used for EH source end equipment is connected to EH cable 403, Ethernet (registered trade mark) transmitter 404 and Ethernet (registered trade mark) receiver 405 of EH destination end equipment.
EH source end equipment 401 comprises lan signal transmitter circuit 411, terminating resistor 412, AC coupling capacitance 413 and 414, lan signal acceptor circuit 415, subtraction circuit 416, pull-up resistor 421, the resistance 422 that forms low pass filter and electric capacity 423, comparator 424, pull down resistor 431, the resistance 432 that forms low pass filter and electric capacity 433, comparator 434.
EH destination end equipment 402 comprises lan signal transmitter circuit 441, terminating resistor 442, AC coupling capacitance 443 and 444, lan signal acceptor circuit 445, subtraction circuit 446, pull-up resistor 451, the resistance 452 that forms low pass filter and electric capacity 453, comparator 454, choke 461 and the resistance 462 and 463 that is connected in series between power supply potential and reference potential.
EH cable 403 comprises by keeping the difference transmission lines that line 501 and HPD line 502 constitute.Thereby, form the distolateral terminal 511 in source that keeps line 501, the distolateral terminal 512 in source of HPD line 502, the destination end side terminal 521 that keeps line 501, the destination end side terminal 522 of HPD line.Reservation line 501 and HPD line 502 are twisted together and form the twisted-pair feeder differential pair.
In the source of the communication system 400 with said structure end equipment 401, terminal 511 is connected with terminating resistor 412, lan signal transmitter circuit 411 and lan signal acceptor circuit 415 with 414 via AC coupling capacitance 413 with 512.
Subtraction circuit 416 receive signal voltage transmission that terminating resistor 412 and transmission line 501 and 502 are generated as load and by the electric current from 411 outputs of lan signal transmitter circuit, with the reception voltage signal of the signal that sends from EH destination end equipment 402 with signal SG412.
In subtraction circuit 416, by from signal SG412 deduct that to send signal SG413 that signal SG411 obtains be net signal from the destination end transmission.
Destination end equipment 402 has similar circuit network.Utilize these circuit, source end equipment 401 carries out two-way LAN with destination end equipment 402 and communicates by letter.
Except carrying out above-mentioned LAN communication, HPD line 502 uses the DC bias level, is connected to the information of destination end equipment 402 to source end equipment 401 transmission table timberline cables 403.
When cable 403 is connected to destination end equipment 402, the resistance 462 in the destination end equipment 402 and 463 and choke 461 apply biasing via terminal 522 to HPD line 502, thereby HPD line 502 is setovered with about 4V.
Source end equipment 401 uses the low pass filter that is made of resistance 432 and electric capacity 433, extracts the DC biasing of HPD line 502.After this, source end equipment 401 uses comparator 434 relatively this DC biasing and reference potential Vref2 (for example 1.4V).
If cable 403 is not connected to destination end equipment 402, then the current potential of terminal 512 is owing to pull down resistor 431 is lower than reference potential Vref2.But if cable 403 is connected to destination end equipment 402, then current potential is higher than this reference potential Vref2.
Therefore, the output signal SG415 for the comparator 434 of HIGH represents that cable 403 is connected to destination end equipment 402.
On the contrary, the output signal SG415 for the comparator 434 of LOW represents that cable 403 is not connected to destination end equipment 402.
Above-mentioned the 1st structure example also has following effect: the equipment that the DC bias potential that use to keep line 501 is discerned the two ends that are connected to cable 403 mutually be the EH compatible apparatus or with the incompatible HDMI device of EH.
EH source end equipment 401 use on the pull-up resistors 421 and draw (+5V) keep line 501, and EH destination end equipment 402 uses pull down resistors 451 drop-down reservation lines 501.
These resistance 421 and 451 are not included in the device of not supporting EH.
EH source end equipment 401 uses comparators 424 relatively to pass through the DC current potential and the reference voltage Vref 1 of the reservation line 501 of the low pass filter that is made of resistance 422 and electric capacity 423.
When destination end equipment 402 is that EH is compatible and when drop-down, the current potential that keeps line 501 is 2.5V.But when destination end equipment 402 was not EH compatibility and open circuit, the current potential that keeps line was 5V.Therefore, if reference voltage Vref 1 is set at 3.75V, can determine that then destination end equipment is that EH compatibility or EH are incompatible.
Destination end equipment 402 uses comparators 454 relatively to pass through the DC current potential and the reference voltage Vref 3 of the reservation line 501 of the low pass filter that is made of resistance 452 and electric capacity 453.
When source end equipment 401 drew function for the EH compatibility and on having, the current potential that keeps line 501 was 2.5V.But when source end equipment 401 was not the EH compatibility, the current potential that keeps line 501 was 0V.Therefore, if reference potential is set at 1.25V, can determine that then source end equipment is that EH compatibility or EH are incompatible.
As mentioned above, according to above-mentioned the 1st structure example, using a cable 403 to carry out in the interface of communicating by letter of the exchange of transfer of data, connection device information of video data and voice data and authentication, device control data and LAN communication, by carrying out LAN communication via the two-way communication of a pair of difference transmission lines, and use the DC bias potential of at least one transmission line to notify the connection status of this interface.Therefore, can carry out apart, not communicate by letter and physically do not use scl line and sda line to carry out LAN.
As a result, this is cut apart the electrical specification that makes it possible to at DDC definition and forms the LAN telecommunication circuit independently.Thereby can realize reliable and stable LAN communication at low cost.
Notice that pull-up resistor 421 shown in Figure 180 can not be arranged in the EH source end equipment 401, and is arranged in the EH cable 403.In this case, the terminal of pull-up resistor 421 be arranged on EH cable 403 in line in reservation line 501 be connected with the line that is connected to power supply (power supply potential) (holding wire).
In addition, pull down resistor 451 shown in Figure 180 and resistance 463 can not be arranged in the EH destination end equipment 402, and are arranged in the EH cable 403.In this case, the terminal of pull down resistor 451 be arranged on EH cable 403 in line in reservation line 501 and be connected to the line (ground wire) of (reference potential) be connected.And, the terminal of resistance 463 be arranged on EH cable 403 in line in HPD line 502 and be connected to the line (ground wire) of (reference potential) be connected.
Figure 20 illustrates the circuit diagram of the 2nd structure example of communication system that the DC bias potential that uses at least one transmission line comes the connection status of notification interface.
Same with the 1st structure example, the feature of this communication system 600 is basically, using a cable to carry out the transfer of data of video data and voice data, the exchange of connection device information and authentication, in the interface of the communication of device control data and LAN communication, carry out LAN communication by one-way communication via two pairs of difference transmission lines, and the DC bias potential that uses at least one transmission line is notified the connection status of this interface, and, this communication system 600 is characterised in that, in the time-multiplexed mode of communicating by letter with LAN at least two transmission lines is used for the exchange of connection device information and communicating by letter of authentication.
As shown in figure 20, this communication system 600 comprises LAN function expansion HDMI (hereinafter referred to as " EH ") source end equipment 601, EH destination end equipment 602, is used for EH source end equipment is connected to the EH cable 603 of EH destination end equipment.
EH source end equipment 601 comprises lan signal transmitter circuit 611, terminating resistor 612 and 613, AC coupling capacitance 614～617, lan signal acceptor circuit 618, inverter 620, resistance 621, form the resistance 622 and the electric capacity 623 of low pass filter, comparator 624, pull down resistor 631, form the resistance 632 and the electric capacity 633 of low pass filter, comparator 634, NOR door 640, analog switch 641～644, inverter 635, analog switch 646 and 747, DDC transceiver 651 and 652 and pull-up resistor 653 and 654.
EH destination end equipment 602 comprises lan signal transmitter circuit 661, terminating resistor 662 and 663, AC coupling capacitance 664～667, lan signal acceptor circuit 668, pull down resistor 671, the resistance 672 that forms low pass filter and electric capacity 673, comparator 674, choke 681, the resistance 682 and 683 that is connected in series, analog switch 691～694, inverter 695, analog switch 696 and 697, DDC transceiver 701 and 702 and pull-up resistor 703 between power supply potential and reference potential.
EH cable 403 comprises difference transmission lines that is made of reservation line 801 and scl line 803 and the difference transmission lines that is made of sda line 804 and HPD line 802.Thereby, distolateral terminal 811～814 in formation source and destination end side terminal 821～824.
Reservation line 801 and scl line 803 are twisted together and form the twisted-pair feeder differential pair, and sda line 804 and HPD line 802 are twisted together and form the twisted-pair feeder differential pair.
In the source of communication system 600 end equipment 601 with said structure, terminal 811 with 813 via AC coupling capacitance 614 with 615 and analog switch 641 with 642 be used for sending the transmitter circuit 611 that LAN sends signal SG611 and be connected to destination end, and be connected with terminating resistor 612.
Terminal 814 with 812 via AC coupling capacitance 616 with 617 and analog switch 643 be connected with the acceptor circuit 618 that is used for receiving lan signals with 644 from destination end equipment 602, and be connected with terminating resistor 613.
In destination end equipment 602, terminal 821～824 via AC coupling capacitance 664,665,666 with 667 and analog switch 691～694 and transmitter and acceptor circuit 668 with 661 and terminating resistor 662 be connected with 663.
Analog switch 641～644 and analog switch 691～694 are connected when carrying out LAN communication, disconnect when carrying out DDC communication.
Source end equipment 601 is connected to DDC transceiver 651 and 652 and pull-up resistor 653 and 654 via analog switch 646 and 647 with terminal 813 and 814 respectively.
Destination end equipment 602 is connected to DDC transceiver 701 and 702 and pull-up resistor 703 via analog switch 696 and 697 with terminal 823 and 824 respectively.
Analog switch 646,647,696 is carrying out connecting disconnection when carrying out DLAN communication when DDC communicates by letter with 697.
Except the resistance 62 of source end equipment 601 is driven by inverter 620, use the identification mechanism and above-mentioned the 1st structure example of EH compatible apparatus of the current potential that keeps line 801 basic identical.
Inverter 620 be input as HIGH the time, identical with the situation that has connected the incompatible device of EH from the viewpoint of destination end equipment 602, resistance 621 is as providing the pull down resistor of 0V pattern to work.
The result, the signal SG623 of the compatible recognition result of EH of expression destination end equipment 602 becomes LOW, thereby the analog switch 691～694 by signal SG623 control disconnects, and by by use inverter 695 analog switch 696 and 697 of the anti-phase signal controlling that obtains of signal SG623 being connected.
As a result, destination end equipment 602 enters scl line 803 and sda line 804 and disconnects from the LAN transceiver and be connected and be connected to the pattern of DDC transceiver.
On the other hand, in source end equipment 601, the input of inverter 620 also is imported into NOR door 640, thereby the output SG614 of NOR door 640 becomes LOW.
Analog switch 641～644 by the output signal SG614 of NOR door 640 control disconnects, and by by using inverter 645 that the analog switch 646 and 647 of the anti-phase signal controlling that obtains of signal SG614 is connected.
As a result, source end equipment 601 also enters scl line 803 and sda line 804 and disconnects from the LAN transceiver and be connected and be connected to the pattern of DDC transceiver.
On the contrary, when inverter 620 be input as LOW the time, source end equipment 601 and destination end equipment 602 all enter scl line 803 and sda line 804 and disconnect from the DDC transceiver and be connected and be connected to the pattern of LAN transceiver.
Be used to use the DC bias potential of HPD line 802 to check that the circuit 631～634 of connection and circuit 681～683 have the function same with the 1st structure example.
That is, except carrying out above-mentioned LAN communication, HPD line 802 uses the DC bias level, is connected to the information of destination end equipment 602 to source end equipment 601 transmission table timberline cables 603.
When cable 603 is connected to destination end equipment 602, the resistance 682 in the destination end equipment 602 and 683 and choke 681 apply biasing via terminal 822 to HPD line 802, thereby HPD line 802 is setovered with about 4V.
Source end equipment 601 uses the low pass filter that is made of resistance 632 and electric capacity 633, extracts the DC biasing of HPD line 802, and uses comparator 634 relatively this DC biasing and reference potential Vref2 (for example 1.4V).
If cable 603 is not connected to destination end equipment 602, then the current potential of terminal 812 is owing to pull down resistor 631 is lower than reference potential Vref2.But if cable 603 is connected to destination end equipment 602, then current potential is higher than this reference potential Vref2.
Therefore, the output signal SG613 for the comparator 634 of HIGH represents that cable 603 is connected to destination end equipment 602.
On the contrary, the output signal SG613 for the comparator 634 of LOW represents that cable 603 is not connected to destination end equipment 602.
As mentioned above, according to above-mentioned the 2nd structure example, using a cable to carry out in the interface of communicating by letter of the exchange of transfer of data, connection device information of video data and voice data and authentication, device control data and LAN communication, carry out LAN communication by one-way communication, and use the DC bias potential of at least one transmission line to notify the connection status of this interface via two pairs of difference transmission lines.And, in the time-multiplexed mode of communicating by letter with LAN at least two transmission lines are used for the exchange of connection device information and communicating by letter of authentication.Therefore, can carry out scl line and sda line be connected to the LAN telecommunication circuit during with scl line and sda line be connected to the DDC circuit during the time division multiplexing of separating.This is cut apart the electrical specification that makes it possible to at the DDC definition and forms the LAN telecommunication circuit independently, thereby can realize reliable and stable LAN communication at low cost.
Notice that resistance 621 shown in Figure 20 can not be arranged in the EH source end equipment 601, and is arranged in the EH cable 603.In this case, the terminal of resistance 621 be arranged on EH cable 603 in line in reservation line 801 be connected with the line that is connected to power supply (power supply potential) (holding wire).
In addition, pull down resistor 671 shown in Figure 20 and resistance 683 can not be arranged in the EH destination end equipment 602, and are arranged in the EH cable 603.In this case, the terminal of pull down resistor 671 be arranged on EH cable 603 in line in reservation line 801 and be connected to the line (ground wire) of (reference potential) be connected.And, the terminal of resistance 683 be arranged on EH cable 603 in line in HPD line 802 and be connected to the line (ground wire) of (reference potential) be connected.
As mentioned above, in relating to the execution mode of Fig. 2～Figure 17,19 HDMI extremely in, SDA and SCL are as the 1st differential pair, CEC and Reserved (reservations) are used as the 2nd differential pair, thereby are implemented in the full-duplex communication that every centering is carried out one-way communication.
But, in SDA and SCL, to draw in row communication on the 1.5k Ω, communicate with Low ESR for L for H.In addition, in CEC, to draw in row communication on the 27k Ω, communicate with Low ESR for L for H.
If in order to keep keeping these functions, then be difficult to be shared in the LAN function of high-speed data communication of the demanding terminal impedance matching of transmission line with the compatibility of existing HDMI.
Therefore, in the 1st structure example, do not use SDA, SCL and CEC line, but a pair of two-way communication of the differential pair by using Reserved and HPD realizes full-duplex communication.
Because HPD is a DC level marking signal, therefore can use the injection and the DC level of the lan signal of AC coupling to insert (plug) transmission of Information simultaneously.Reserved is provided with new function, thereby both sides can be to have the LAN function of using the DC level with the same mutual identification terminal of method of HPD.
In the 2nd structure example, use HPD, SDA, SCL and Reserved to form two differential pairs.By each to carrying out one-way communication, thereby realize two pairs of full-duplex communications.
In HDMI, transmitter is always as main equipment, the timing of using the burst DDC of SDA and SCL to communicate by letter by transmitter control.
In this example, the operation simulation switch, thus when transmitter carried out DDC communication, SDA and scl line were connected to the DDC transceiver, and when transmitter was not carried out DDC communication, these lines were connected to the LAN transceiver.
The DC level that these switching operation signals also are used the Reserved line sends to receiver.Carry out same handover operation at receiver-side.
By using said structure, the 1st advantage is that SDA, SCL communicate by letter with CEC can not be subjected to the The noise of LAN communication, therefore can guarantee all the time that stable DDC communicates by letter with CEC.
This is because in the 1st structure example, LAN physically separates with these lines, in the 2nd structure example, uses switch that lan signal is separated from these lines in the DDC communication period.
The 2nd advantage is that the line that has desirable terminal by use carries out LAN communication, the stabilized communication that can realize having wide nargin.
This be because, in the 1st structure example, lan signal is superimposed upon on the Reserved and HPD line that only sends the DC level signal, therefore can keep having the termination impedance of ideal value with the enough wide frequency range that LAN signal post needs, in the 2nd structure example, only use switch to connect the LAN termination circuit that does not allow to be used for DDC communication in the LAN communication period.
Figure 21 A～21E is the figure that the waveform of the two-way communication in the communication system of the 1st and the 2nd structure example is shown.
Figure 21 A illustrates from the waveform of the signal of EH destination end equipment transmission.Figure 21 B illustrates the waveform of the signal that is received by EH destination end equipment.Figure 21 C illustrates the waveform by the signal of cable.Figure 21 D illustrates the waveform of the signal that is received by EH source end equipment.Figure 21 E illustrates from the waveform of the signal of EH source end equipment transmission.
As can be seen from Figure 21, according to the said structure example, can realize good two-way communication.
Claims (according to the modification of the 19th of treaty)
1. transmitter, in being used for during effective video, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this transmitter comprises:
Signal transmitting unit is configured to via difference transmission lines second differential signal that expression is different from the transmission data of pixel data be sent to receiver, described difference transmission lines by first holding wire and secondary signal line constituted to forming;
The signal receiving unit that is connected with signal transmitting unit, this signal receiving unit receive the 3rd differential signal that sends via first holding wire and secondary signal line from receiver; With
Subtraction circuit is configured to deduct second differential signal from the signal that is received by signal receiving unit.
2. transmitter as claimed in claim 1, wherein,
The secondary signal line is the HPD holding wire.
3. transmitter as claimed in claim 1, wherein,
First holding wire is the stick signal line.
4. transmitter as claimed in claim 1 also comprises:
Whether equipment joint detection unit is configured to use the DC bias potential of secondary signal line to detect receiver and connects via difference transmission lines.
5. transmitter as claimed in claim 1 also comprises:
Comparator is configured the DC bias potential and the predetermined reference voltage of first holding wire are compared.
6. transmitter as claimed in claim 1 also comprises:
Resistance in the circuit of connection signal transmitting unit and signal receiving unit.
7. sending method that is used for transmitter, this transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this method may further comprise the steps:
By signal transmitting unit, via difference transmission lines second differential signal that expression is different from the transmission data of pixel data is sent to receiver, described difference transmission lines by first holding wire and secondary signal line constituted to forming;
By the signal receiving unit that is connected with signal transmitting unit, receive the 3rd differential signal that sends via first holding wire and secondary signal line from receiver; With
By subtraction circuit, from the signal that receives by signal receiving unit, deduct second differential signal.
8. receiver, be used to use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this receiver comprises:
Signal transmitting unit is configured to via difference transmission lines the 3rd differential signal that expression is different from the transmission data of pixel data be sent to transmitter, described difference transmission lines by first holding wire and secondary signal line constituted to forming;
The signal receiving unit that is connected with signal transmitting unit, this signal receiving unit receive second differential signal that sends via first holding wire and secondary signal line from transmitter; With
Subtraction circuit is configured to deduct the 3rd differential signal from the signal that is received by signal receiving unit.
9. receiver as claimed in claim 8, wherein,
The secondary signal line is the HPD holding wire.
10. receiver as claimed in claim 8, wherein,
First holding wire is the stick signal line.
11. receiver as claimed in claim 8 also comprises:
Equipment connects notification unit, is configured to use the DC bias potential of secondary signal line to come whether to connect relevant information via difference transmission lines to the transmitter notice with receiver.
12. receiver as claimed in claim 8 also comprises:
Comparator is configured the DC bias potential and the predetermined reference voltage of first holding wire are compared.
13. receiver as claimed in claim 8 also comprises:
Resistance in the circuit of connection signal transmitting unit and signal receiving unit.
14. receiver as claimed in claim 8, wherein,
This receiver has will send to information transmitter, relevant with the performance of receiver.
15. method of reseptance that is used for receiver, this receiver use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this method may further comprise the steps:
By signal transmitting unit, via difference transmission lines the 3rd differential signal that expression is different from the transmission data of pixel data is sent to transmitter, described difference transmission lines by first holding wire and secondary signal line constituted to forming;
By the signal receiving unit that is connected with signal transmitting unit, receive second differential signal that sends via first holding wire and secondary signal line from transmitter; With
By subtraction circuit, from the signal that receives by signal receiving unit, deduct the 3rd differential signal.
16. a communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and data communication, this communication system comprises:
But allow the connected a pair of difference transmission lines of connection device,
Wherein, carry out data communication by two-way communication, and described communication system has following function: use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify or detect the connection status of this interface via described a pair of difference transmission lines.
17. communication system as claimed in claim 16, wherein,
But a connection device that is connected applies the DC biasing to described at least one transmission line, thereby this transmission line has predetermined potential, but another connection device that is connected has the function of discerning connection status by this DC biasing relatively and predetermined reference current potential.
18. communication system as claimed in claim 16, wherein,
Setover and discern but whether the equipment that is connected is the function of connection device but at least one connection device that is connected with described a pair of difference transmission lines has the DC that uses another transmission lines.
19. communication system as claimed in claim 17, wherein,
Setover and discern but whether the equipment that is connected is the function of connection device but at least one connection device that is connected with described a pair of difference transmission lines has the DC that uses another transmission lines.
20. transmitter that can be applicable to communication system, this communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and data communication, this transmitter is connected with a pair of difference transmission lines, carry out data communication by the two-way communication via described a pair of difference transmission lines, described transmitter comprises following function:
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify or the connection status of this interface.
21. receiver that can be used for communication system, this communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and data communication, this receiver is connected with a pair of difference transmission lines, carry out data communication by the two-way communication via described a pair of difference transmission lines, described receiver comprises following function:
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify or detect the connection status of this interface.
22. a communication means uses a cable to carry out transmission, the exchange of connection device information and the communicating by letter and data communication of authentication, device control data of video data and voice data, this communication means may further comprise the steps:
But connection device is connected with a pair of difference transmission lines,
Carry out data communication by two-way communication via described a pair of difference transmission lines; And
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify or detect the connection status of this interface.
23. one kind makes computer use a cable to carry out the program of communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and data communication, this program may further comprise the steps:
But under connection device and state that a pair of difference transmission lines is connected, carry out data communication by two-way communication via described a pair of difference transmission lines; And
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify or detect the connection status of this interface.
24. communications cable, be used to connect transmitter and receiver, this transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this transmitter comprises:
Signal transmitting unit is configured to via difference transmission lines second differential signal that expression is different from the transmission data of pixel data be sent to receiver, described difference transmission lines by first holding wire and secondary signal line constituted to forming;
The signal receiving unit that is connected with signal transmitting unit, this signal receiving unit receive the 3rd differential signal that sends via first holding wire and secondary signal line from receiver; With
Subtraction circuit is configured to deduct second differential signal from the signal that is received by signal receiving unit,
This receiver use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this receiver comprises:
Signal transmitting unit is configured to via difference transmission lines the 3rd differential signal that expression is different from the transmission data of pixel data be sent to transmitter, described difference transmission lines by first holding wire and secondary signal line constituted to forming;
The signal receiving unit that is connected with signal transmitting unit, this signal receiving unit receive second differential signal that sends via first holding wire and secondary signal line from transmitter; With
Subtraction circuit is configured to deduct the 3rd differential signal from the signal that is received by signal receiving unit,
This communications cable comprises:
First holding wire;
The secondary signal line; With
Another holding wire,
Wherein, the formation twisted-pair feeder differential pair thereby first holding wire and secondary signal line are twisted together, described another holding wire are used to use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver.

Claims (34)

1. communication system comprises:
Transmitter, in being used for during effective video, use the pixel data of first differential signal to the non-compressed image of the unidirectional transmission of receiver one screen, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during; With
Receiver is used to receive first differential signal that sends from transmitter,
Wherein, transmitter comprises:
First converting unit, be used for will be different from the transmission data transaction of pixel data become to form signal and second and form second differential signal that signal constitutes by first, via first holding wire first composition signal is sent to receiver, and exports the second composition signal;
First selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of first converting unit output, and via the secondary signal line selected signal sent to receiver;
First control unit is used to control, and makes when sending described transmission signal to receiver, selects described transmission signal by first selected cell, when sending second differential signal to receiver, selects second to form signal by first selected cell; And
First decoding unit is used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data,
Wherein, receiver comprises:
Second converting unit, the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter;
Second decoding unit is used to receive second differential signal that sends from transmitter, and second differential signal is decoded into former data;
Second selected cell is used for selecting sending signal and second and forms of signal; And
Second control unit is used to control, and makes when receiving described transmission signal, select and receive described transmission signal by second selected cell, when receiving second differential signal, select second to form signal by second selected cell, and form signal by second decoding unit reception second.
2. communication means that is used for communication system, this communication system comprises:
Transmitter, in being used for during effective video, use the pixel data of first differential signal to the non-compressed image of the unidirectional transmission of receiver one screen, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during; With
Receiver is used to receive first differential signal that sends from transmitter,
Wherein, transmitter comprises:
First converting unit, be used for will be different from the transmission data transaction of pixel data become to form signal and second and form second differential signal that signal constitutes by first, via first holding wire first composition signal is sent to receiver, and exports the second composition signal;
First selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of first converting unit output, and via the secondary signal line selected signal sent to receiver; And
First decoding unit is used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data,
Wherein, receiver comprises:
Second converting unit, the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter;
Second decoding unit is used to receive second differential signal that sends from transmitter, and second differential signal is decoded into former data; And
Second selected cell is used for selecting sending signal and second and forms of signal,
Said method comprising the steps of:
Control, make when sending described transmission signal to receiver, select described transmission signal, when sending second differential signal, select second to form signal by first selected cell to receiver by first selected cell; And
Control, make when receiving described transmission signal by receiver, select and receive described transmission signal by second selected cell, when receiving second differential signal by receiver, select second to form signal by second selected cell, and form signal by second decoding unit reception second.
3. transmitter, in being used for during effective video, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this transmitter comprises:
Converting unit, be used for will be different from the transmission data transaction of pixel data become to form signal and second and form second differential signal that signal constitutes by first, via first holding wire first composition signal is sent to receiver, and exports the second composition signal;
First selected cell is used for selecting relevant with control operation first to send signal and form of signal from second of converting unit output, and via the secondary signal line selected signal is sent to receiver;
First control unit is used to control, and makes when sending the first transmission signal to receiver, selects first to send signal by first selected cell, when sending second differential signal to receiver, selects second to form signal by first selected cell; And
Decoding unit, be used to receive send from receiver, form signal and the 4th by the 3rd and form the 3rd differential signal that signal constitutes, and the 3rd differential signal is decoded into former data.
4. transmitter as claimed in claim 3, wherein,
Decoding unit receives by forming signal via the 3rd of secondary signal line transmission and forming the 3rd differential signal that signal constitutes via the 4th of first holding wire transmission;
First selected cell selects second one or first of forming in signal and the 3rd composition signal to send signal;
When receiving the 3rd differential signal, first control unit is controlled, and makes to select the 3rd to form signal by first selected cell, and receives the 3rd by decoding unit and form signal.
5. transmitter as claimed in claim 4, wherein,
Wherein, first selected cell select second form signal and the 3rd form in the signal one or first send signal with via secondary signal line from the received signal relevant that receiver sends with control operation, and when receiving described received signal, first selected cell receives and exports selected received signal.
6. transmitter as claimed in claim 3, wherein,
Decoding unit receives by forming signal via the 3rd of the 3rd holding wire transmission and forming the 3rd differential signal that signal constitutes via the 4th of the 4th holding wire transmission;
Transmitter also comprises:
Second selected cell is used for selecting the 3rd composition signal and one that will send to second transmission signal receiver, relevant with control operation;
The 3rd selected cell is used for selecting the 4th to form signal and will send to the 3rd of receiver and send of signal; And
Second control unit, be used to control, make when sending the second transmission signal and the 3rd transmission signal to receiver, select second to send signal by second selected cell, and send signal via the 3rd holding wire with second and send to receiver, select the 3rd to send signal by the 3rd selected cell, and send signal via the 4th holding wire with the 3rd and send to receiver, when receiving the 3rd differential signal, select the 3rd to form signal by second selected cell, form signal thereby receive the 3rd, and select the 4th to form signal, form signal thereby receive the 4th by decoding unit by the 3rd selected cell by decoding unit.
7. transmitter as claimed in claim 6, wherein,
First selected cell select second form signal or first send signal with via secondary signal line from receiver first received signal that send, relevant with control operation, when having selected first received signal, receive and export selected first received signal;
Second selected cell select the 3rd form signal or second send signal with via the 3rd holding wire from receiver second received signal that send, relevant with control operation, when having selected second received signal, receive and export selected second received signal.
8. transmitter as claimed in claim 7, wherein,
The first transmission signal and first received signal are CEC (consumer electronics's control) signals as the control data of transmitter or receiver;
Second received signal is conduct information relevant with the performance of receiver and the E-EDID (enhancement mode expanded display recognition data) that is used for control operation;
The data that convert the data of second differential signal to and obtain by the 3rd differential signal is decoded are the data according to Internet protocol (IP);
First control unit is controlled first selected cell, thereby selects second to form signal after receiving second received signal;
Second control unit is controlled second selected cell and the 3rd selected cell, thereby selects the 3rd to form signal and the 4th composition signal after receiving second received signal.
9. communication means that is used for transmitter, this transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this transmitter comprises:
Converting unit, be used for will be different from the transmission data transaction of pixel data become to form signal and second and form second differential signal that signal constitutes by first, via first holding wire first composition signal is sent to receiver, and exports the second composition signal;
Selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of converting unit output, and via the secondary signal line selected signal sent to receiver; And
Decoding unit is used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data,
Said method comprising the steps of:
Control, make when sending described transmission signal to receiver, select described transmission signal, when sending second differential signal, select second to form signal by selected cell to receiver by selected cell.
10. program, comprise the program code of carrying out by the computer of control transmitter, this transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this transmitter comprises:
Converting unit, be used for will be different from the transmission data transaction of pixel data become to form signal and second and form second differential signal that signal constitutes by first, via first holding wire first composition signal is sent to receiver, and exports the second composition signal;
Selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of converting unit output, and via the secondary signal line selected signal sent to receiver; And
Decoding unit is used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data,
Described program code may further comprise the steps:
Control, make when sending described transmission signal to receiver, select described transmission signal, when sending second differential signal, select second to form signal by selected cell to receiver by selected cell.
11. receiver, be used to use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this receiver comprises:
Decoding unit is used to receive by first forming signal and form second differential signal that signal constitutes via the secondary signal line from second of transmitter transmission from what transmitter sent via first holding wire, and second differential signal is decoded into former data;
First selected cell, be used for selecting first form signal with via first holding wire one from transmitter first received signal that send, relevant with control operation;
First control unit is used to control, and makes to select and receive first received signal by first selected cell when receiving first received signal, when receiving second differential signal, is selected and receive first by decoding unit to form signal by first selected cell; And
Converting unit is used for being different from the transmission data transaction Cheng Youdi three composition signals of pixel data and the 3rd differential signal that the 4th composition signal constitutes, and the 3rd differential signal is sent to transmitter.
12. receiver as claimed in claim 11, wherein,
Converting unit is exported the 3rd and is formed signal and send the 4th composition signal via secondary signal alignment transmitter;
The 3rd one of forming the signal that first selected cell selects first received signal or first to form signal and export from converting unit;
First control unit is controlled, and makes when sending the 3rd differential signal, selects the 3rd to form signal by first selected cell, and sends the 3rd composition signal via first holding wire to transmitter.
13. receiver as claimed in claim 12, wherein,
First selected cell selects first to form signal and the 3rd and form in the signal one or first received signal and the transmission signal relevant with control operation one, and when having selected the transmission signal, selected transmission signal is sent to transmitter via first holding wire.
14. receiver as claimed in claim 11, wherein,
Converting unit is exported the 3rd and is formed signal and the 4th composition signal;
Receiver also comprises:
Second selected cell, be used for selecting from the 3rd of converting unit output form signal with via the 3rd holding wire one from transmitter second received signal that send, relevant with control operation;
The 3rd selected cell is used for selecting forming signal and of the 3rd received signal that sends from transmitter via the 4th holding wire from the 4th of converting unit output; And
Second control unit, be used to control, make when receiving second received signal and the 3rd received signal, select and receive second received signal by second selected cell, select and receive the 3rd received signal, when sending the 3rd differential signal by the 3rd selected cell, select the 3rd to form signal by second selected cell, and send to transmitter via the 3rd holding wire, select the 4th to form signal, and send to transmitter via the 4th holding wire by the 3rd selected cell.
15. receiver as claimed in claim 14, wherein,
First selected cell is selected first in forming signal or first received signal and will sending to first transmission signal transmitter, relevant with control operation one, when having selected first to send signal, send selected first via first holding wire to transmitter and send signal;
Second selected cell is selected the 3rd in forming signal or second received signal and will sending to second transmission signal transmitter, relevant with control operation one, when having selected second to send signal, send selected second via the 3rd holding wire to transmitter and send signal.
16. communication means that is used for receiver, this receiver use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this receiver comprises:
Decoding unit is used to receive by first forming signal and form second differential signal that signal constitutes via the secondary signal line from second of transmitter transmission from what transmitter sent via first holding wire, and second differential signal is decoded into former data;
Selected cell, be used for selecting first form signal with via first holding wire one from transmitter received signal that send, relevant with control operation; And
Converting unit, the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter,
Said method comprising the steps of:
Control, make and when receiving described received signal, select and receive described received signal, when receiving second differential signal, select and receive first to form signal by decoding unit by selected cell by selected cell.
17. program, comprise the program code of carrying out by the computer of controlling receiver, this receiver use first differential signal be received in during the effective video in from the pixel data of the non-compressed image of a screen of the unidirectional transmission of transmitter, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this receiver comprises:
Decoding unit is used to receive by first forming signal and form second differential signal that signal constitutes via the secondary signal line from second of transmitter transmission from what transmitter sent via first holding wire, and second differential signal is decoded into former data;
Selected cell, be used for selecting first form signal with via first holding wire one from transmitter received signal transmission, relevant with control operation; And
Converting unit, the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter,
Described program code may further comprise the steps:
Control, make when receiving described received signal, select described received signal, when receiving second differential signal, select and receive first to form signal by decoding unit by selected cell by selected cell.
18. communications cable, be used to connect transmitter and receiver, this transmitter during effective video in, use the pixel data of first differential signal to the non-compressed image of unidirectional transmission one screen of receiver, during the described effective video expression except horizontal blanking interval and vertical blanking interval, from a vertical synchronizing signal to next vertical synchronizing signal during, this transmitter comprises:
First converting unit, be used for will be different from the transmission data transaction of pixel data become to form signal and second and form second differential signal that signal constitutes by first, via first holding wire first composition signal is sent to receiver, and exports the second composition signal;
First selected cell is used for selecting the transmission signal relevant with control operation and forms of signal from second of first converting unit output, and via the secondary signal line selected signal sent to receiver;
First control unit is used to control, and makes when sending described transmission signal to receiver, selects described transmission signal by first selected cell, when sending second differential signal to receiver, selects second to form signal by first selected cell; And
First decoding unit is used to receive the 3rd differential signal that sends from receiver, and the 3rd differential signal is decoded into former data,
This receiver receives first differential signal that sends from transmitter, and this receiver comprises:
Second converting unit, the transmission data transaction that is used for being different from pixel data becomes the 3rd differential signal, and the 3rd differential signal is sent to transmitter;
Second decoding unit is used to receive second differential signal that sends from transmitter, and second differential signal is decoded into former data;
Second selected cell is used for selecting sending signal and second and forms of signal; And
Second control unit is used to control, and makes when receiving described transmission signal, select and receive described transmission signal by second selected cell, when receiving second differential signal, select second to form signal by second selected cell, and receive second by second decoding unit and form signal
This communications cable comprises:
First holding wire; With
The secondary signal line,
Wherein, the formation twisted-pair feeder differential pair thereby first holding wire and secondary signal line are twisted together.
19. a communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this communication system comprises:
But allow the connected a pair of difference transmission lines of connection device,
Wherein, by carrying out LAN communication via the two-way communication of described a pair of difference transmission lines, and described communication system has following function: use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify the connection status of this interface.
20. communication system as claimed in claim 19, wherein,
But a connection device that is connected applies DC biasing to a described transmission lines, thereby this transmission line has predetermined potential, but another connection device that is connected has the function of discerning connection status by this DC biasing relatively and predetermined reference current potential.
21. communication system as claimed in claim 19, wherein,
Setover and discern but whether the equipment that is connected is the function of connection device but at least one connection device that is connected with described a pair of difference transmission lines has the DC that uses another transmission lines.
22. communication system as claimed in claim 20, wherein,
Setover and discern but whether the equipment that is connected is the function of connection device but at least one connection device that is connected with described a pair of difference transmission lines has the DC that uses another transmission lines.
23. a communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this communication system comprises:
But allow the connected two pairs of difference transmission lines of connection device,
Wherein, carry out LAN communication by one-way communication, and described communication system has following function: use the DC bias potential of at least one difference transmission lines to notify the connection status of this interface via described two pairs of difference transmission lines;
Two transmission lines are used for the exchange and the authentication of connection device information at least in the time-multiplexed mode of communicating by letter with LAN.
24. communication system as claimed in claim 23, wherein,
But a connection device that is connected applies the DC biasing at least one transmission line, thereby this transmission lines has predetermined potential, but another connection device that is connected has the function of discerning connection status by this DC biasing relatively and predetermined reference current potential.
25. communication system as claimed in claim 23, wherein,
But the DC that uses described two pairs of difference transmission lines at least one connection device connected to one another to have to use the transmission line different with described at least one transmission line setovers and discerns but whether the equipment that is connected is the function of connection device.
26. communication system as claimed in claim 24, wherein,
But the DC that uses described two pairs of difference transmission lines at least one connection device connected to one another to have to use the transmission line different with described at least one transmission line setovers and discerns but whether the equipment that is connected is the function of connection device.
27. transmitter that can be applicable to communication system, this communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this transmitter is connected with a pair of difference transmission lines, by carry out LAN communication via the two-way communication of described a pair of difference transmission lines, described transmitter comprises following function:
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify the connection status of this interface.
28. receiver that can be used for communication system, this communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this receiver is connected with a pair of difference transmission lines, by carry out LAN communication via the two-way communication of described a pair of difference transmission lines, described receiver comprises following function:
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify the connection status of this interface.
29. transmitter that can be applicable to communication system, this communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this transmitter is connected with two pairs of difference transmission lines, carry out LAN communication by the one-way communication via described two pairs of difference transmission lines, described transmitter has following function:
Use the DC bias potential of at least one difference transmission lines to notify the connection status of this interface.
30. receiver that can be applicable to communication system, this communication system comprises the interface that uses a cable to carry out communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this receiver is connected with two pairs of difference transmission lines, carry out LAN communication by the one-way communication via described two pairs of difference transmission lines, described receiver has following function:
Use the DC bias potential of at least one difference transmission lines to notify the connection status of this interface.
31. a communication means uses a cable to carry out transmission, the exchange of connection device information and the communicating by letter and LAN communication of authentication, device control data of video data and voice data, this communication means may further comprise the steps:
But connection device is connected with a pair of difference transmission lines,
By carry out LAN communication via the two-way communication of described a pair of difference transmission lines; And
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify the connection status of this interface.
32. a communication means uses a cable to carry out transmission, the exchange of connection device information and the communicating by letter and LAN communication of authentication, device control data of video data and voice data, this communication means may further comprise the steps:
But connection device is connected with two pairs of difference transmission lines;
Carry out LAN communication by one-way communication via described two pairs of difference transmission lines; And
Use the DC bias potential of at least one difference transmission lines to notify the connection status of this interface, and at least two transmission lines are used for the exchange of connection device information and communicating by letter of authentication in the time-multiplexed mode of communicating by letter with LAN.
33. one kind makes computer use a cable to carry out the program of communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this program may further comprise the steps:
But under connection device and state that a pair of difference transmission lines is connected, by carry out LAN communication via the two-way communication of described a pair of difference transmission lines; And
Use the DC bias potential of at least one difference transmission lines in the described a pair of difference transmission lines to notify the connection status of this interface.
34. one kind makes computer use a cable to carry out the program of communicating by letter of the exchange of transmission, connection device information of video data and voice data and authentication, device control data and LAN communication, this program may further comprise the steps:
But under connection device and state that two pairs of difference transmission lines are connected, carry out LAN communication by one-way communication via described two pairs of difference transmission lines; And
Use the DC bias potential of at least one difference transmission lines to notify the connection status of this interface, and at least two transmission lines are used for the exchange of connection device information and communicating by letter of authentication in the time-multiplexed mode of communicating by letter with LAN.
CN2007800466419A 2006-11-07 2007-11-07 Communication system, transmitting device, receiving device and communication method Expired - Fee Related CN101563921B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102088586A (en) * 2009-12-03 2011-06-08 索尼公司 Control device, control method, and program
CN102148951A (en) * 2010-02-10 2011-08-10 三星电子株式会社 Transmitter for automatically detecting power-down of transmitter and system including the same
CN102572353A (en) * 2010-12-28 2012-07-11 索尼公司 Electronic apparatus, method for controlling electronic apparatus, transmission apparatus, and reception apparatus
CN103269476A (en) * 2012-02-15 2013-08-28 三星电子株式会社 Data transmitting apparatus, data receiving apparatus, data transceiving system, data transmitting method, and data receiving method
CN104349075A (en) * 2013-08-02 2015-02-11 宏正自动科技股份有限公司 Multimedia transmission receiving system, multimedia transmitting device and multimedia receiving device
US9497297B2 (en) 2012-02-15 2016-11-15 Samsung Electronics Co., Ltd. Data transmitting apparatus, data receiving apparatus, data transreceiving system, data transmitting method, data receiving method and data transreceiving
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US9661107B2 (en) 2012-02-15 2017-05-23 Samsung Electronics Co., Ltd. Data transmitting apparatus, data receiving apparatus, data transceiving system, data transmitting method, data receiving method and data transceiving method configured to distinguish packets
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Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103533282B (en) * 2006-11-07 2017-01-04 索尼株式会社 Transmission equipment, sending method, reception equipment and method of reseptance
US8674679B2 (en) * 2009-10-08 2014-03-18 Qualcomm Incorporated Power saving during a connection detection
US20120212672A1 (en) * 2009-11-06 2012-08-23 Koninklijke Philips Electronics N.V. Method and apparatus for controlling settings of a device for playback of a content item
JP2011109398A (en) * 2009-11-17 2011-06-02 Sony Corp Image transmission method, image receiving method, image transmission device, image receiving device, and image transmission system
CN101742156B (en) * 2009-12-08 2013-01-09 山东泰信电子有限公司 High-resolution digital television all-in-one machine and implementation method thereof
CN102714745B (en) * 2010-02-10 2015-06-17 松下电器产业株式会社 Digital video signal output device and display device, and digital video signal output method and reception method
JP2011244265A (en) * 2010-05-19 2011-12-01 Sony Corp Receiving device and receiving method
CN103620519B (en) * 2011-07-01 2017-06-09 索尼公司 Electronic equipment, the classification for transmission cable determine method and transmission cable
JP2013046123A (en) * 2011-08-23 2013-03-04 Sony Corp Signal converter, signal conversion method, and terminal device
WO2013061366A1 (en) * 2011-10-26 2013-05-02 日立コンシューマエレクトロニクス株式会社 Video signal transmission/reception method, display device, and decoding device
TWI479894B (en) 2011-12-06 2015-04-01 Asmedia Technology Inc Data transceiving apparatus with high-definition multimedia interface
CN103200382B (en) * 2012-01-09 2017-10-31 上海华虹集成电路有限责任公司 The transmitting terminal of HDMI and the interactive communication method of receiving terminal
CN104104972A (en) * 2013-04-10 2014-10-15 深圳市快播科技有限公司 Multimedia playing method, apparatus and system
JP6254297B2 (en) * 2014-03-24 2017-12-27 エルジー エレクトロニクス インコーポレイティド Data transmission / reception device and method using HDMI (registered trademark)
WO2015174753A1 (en) 2014-05-16 2015-11-19 Samsung Electronics Co., Ltd. Content output apparatus, mobile apparatus, and controlling methods thereof
KR20170020744A (en) * 2014-06-12 2017-02-24 소니 주식회사 Interface circuit and information processing system
US10310578B2 (en) * 2014-06-19 2019-06-04 Google Llc Systems, methods, and media for providing power to an HDMI source
US9215491B1 (en) * 2014-07-10 2015-12-15 Google Inc. Methods, systems, and media for controlling a bi-directional HDMI port
US10313720B2 (en) 2014-07-18 2019-06-04 Sony Corporation Insertion of metadata in an audio stream
CN105681892B (en) * 2016-02-19 2019-03-15 网宿科技股份有限公司 The method, apparatus and system of differential data transmission
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US9693109B1 (en) * 2016-09-12 2017-06-27 Bose Corporation Configurable media processing based on mapping of remote controller buttons
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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002290932A (en) * 2001-03-27 2002-10-04 Toshiba Corp Digital broadcasting receiver and method for controlling it
KR100409101B1 (en) * 2002-01-29 2003-12-11 신옥균 Internet broadcasting relay system and method thereof for personal telecommunication terminal
KR100604032B1 (en) * 2003-01-08 2006-07-24 엘지전자 주식회사 Apparatus for supporting plural codec and Method thereof
CN1728794A (en) * 2004-07-28 2006-02-01 上海乐金广电电子有限公司 Method and device for transmitting audio signal of video source equipment
JP3919115B2 (en) * 2004-08-18 2007-05-23 ソニー株式会社 DECODING DEVICE, DECODING METHOD, DECODING PROGRAM, RECORDING MEDIUM CONTAINING DECODING PROGRAM, AND REVERSE REPRODUCTION DEVICE, REVERSE REPRODUCTION METHOD, REVERSE REPRODUCTION PROGRAM, AND RECORDING MEDIUM CONTAINING REVERSE REPRODUCTION PROGRAM
JP4660184B2 (en) * 2004-12-27 2011-03-30 株式会社東芝 Signal relay apparatus and signal relay method
JP4912296B2 (en) * 2005-04-28 2012-04-11 パナソニック株式会社 Lip sync correction system, lip sync correction device, and lip sync correction method

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