WO2007102413A1 - 送信装置、受信装置および送受信装置 - Google Patents
送信装置、受信装置および送受信装置 Download PDFInfo
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- WO2007102413A1 WO2007102413A1 PCT/JP2007/053995 JP2007053995W WO2007102413A1 WO 2007102413 A1 WO2007102413 A1 WO 2007102413A1 JP 2007053995 W JP2007053995 W JP 2007053995W WO 2007102413 A1 WO2007102413 A1 WO 2007102413A1
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- circuit
- function
- image quality
- processing circuit
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4112—Peripherals receiving signals from specially adapted client devices having fewer capabilities than the client, e.g. thin client having less processing power or no tuning capabilities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/43622—Interfacing an external recording device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
- H04N5/602—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/10—Special adaptations of display systems for operation with variable images
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/02—Graphics controller able to handle multiple formats, e.g. input or output formats
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
- G09G2370/045—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial
- G09G2370/047—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial using display data channel standard [DDC] communication
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/005—Adapting incoming signals to the display format of the display terminal
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
Definitions
- the present invention relates to a video / audio signal processing method and a transmission / reception apparatus that connect a plurality of devices, process a video / audio signal, transmit the signal, and output the signal.
- HDMI registered trademark
- each device often has its own high image quality circuit or high-quality sound circuit.
- each image quality improvement circuit and sound quality improvement circuit is designed so that the optimum image quality and optimum sound quality can be configured by a single device. Therefore, the optimal image quality and sound quality may not be output when video and audio are output via multiple devices.
- a display device on the signal receiving side in particular, often operates by adaptively switching a circuit that operates depending on whether each frame or a part of the frame is a still image or a moving image.
- a display device on the signal receiving side since only the obtained video information power is determined whether it is a still image or a moving image, depending on the determination algorithm and the nature of the image, there may be a case where the image quality is not optimal due to false detection.
- the video signal and the audio signal are transmitted by both the transmission device and the reception device.
- duplicate processing is performed.
- the load on the entire system of the transmission device and the reception device increases.
- the above method has such a problem.
- Patent Document 1 Japanese Patent Laid-Open No. 11-187034
- Non-Patent Document 1 HDMI Standard, High Definition Multimedia Interface “Specification Version 0.9”, “Speciiication Version 1.0”, “; 5pecification Version 1.1”
- the video / audio signal processing method and the transmission / reception device according to the present invention can reduce the load on the entire system, and which one of the functions of the transmission device and the reception device can be used to achieve higher image quality and higher sound quality output. Enables optimal control of the entire system based on Furthermore, the video / audio signal processing method and the transmission / reception apparatus according to the present invention make it possible to select a high-quality circuit or a high-quality circuit with accuracy of a frame or a part of the frame.
- the transmission / reception device includes a transmission device capable of correcting and outputting image quality or sound quality for an input broadcast wave, and an image quality or sound quality correction function similar to that of the transmission device.
- a transmission / reception device comprising a receiving device capable of outputting an image with a corrected image quality or sound quality, wherein the transmitting device has a function of correcting an input broadcast signal and has a function of correcting an input broadcast signal.
- a control circuit that controls the functions of the second image quality processing circuit for correcting the output signal output from the transmission device, and a second image quality indicating the function of the second image quality processing circuit.
- Recorded in the second recording section for recording circuit attribute information and the first recording section.
- a comparison unit that controls the function of the processing circuit, and selects whether to correct the broadcast signal in the first high-quality image processing circuit or the second high-quality image processing based on the comparison result of the comparison unit.
- the transmission device can correct the image quality or the sound quality of the input broadcast wave and output it
- a transmission device that supplies an output signal and information related to the output signal to a reception device and can receive a control signal from the reception device, and is input with a video signal source that outputs a video signal based on a broadcast wave.
- the first image quality processing circuit that can accept the control signal and the first image quality processing circuit that has the function to correct the signal and corrects the signal output from the video signal source and supplies it to the receiver.
- a control circuit for controlling, and a first recording unit that records first circuit attribute information indicating a function of the first high-quality image processing circuit and outputs the first circuit attribute information.
- the receiving device has the same image quality or sound quality correction function as the transmitting device, can correct the image quality or sound quality of the input signal, and can output the information.
- a second image quality processing circuit for correcting an input signal having a function of correcting the signal, and a second high-level processing circuit.
- a temporary storage unit that stores information related to a signal input to the image quality processing circuit, a second recording unit that records second circuit attribute information indicating a function of the second image quality processing circuit, and a control signal
- a comparator that controls the function of the second high image quality processing circuit based on the second circuit attribute information that can be transmitted and recorded in the second recording unit and the information stored in the temporary storage unit;
- a display device for displaying the output of the high image quality processing circuit.
- the transmission device includes an audio signal source that outputs an audio signal, an audio data generation unit that generates audio data, and a first microcomputer that controls the audio data generation unit.
- the audio data generation unit includes: Audio data to be output when audio data is to be output by transmitting in advance using a low-speed signal line, which is independent of the video signal transmission path, and an ID number for distinguishing audio data from audio data The ID number corresponding to is transmitted during the blanking period of the video signal.
- the receiving device is configured to receive audio data in advance via a synthesis unit, a sound output device that receives sound from the output of the synthesis unit, and a low-speed signal line that is independent of the video signal transmission line.
- a control unit is provided with a temporary storage unit that receives an ID number for distinguishing it and stores voice data and the ID number, and when the ID number to be output is transmitted, the control unit The audio data corresponding to the number is supplied from the temporary storage unit to the synthesis unit, and the audio signal received by the synthesis unit and the audio data are synthesized.
- FIG. 1 is a block diagram showing a configuration of a transmission device and a reception device of the present invention.
- FIG. 2A is a diagram showing an example of circuit attribute information of the present invention.
- FIG. 2B is a diagram showing an example of circuit attribute information of the present invention.
- FIG. 3A is a diagram showing an example of circuit attribute information of the present invention.
- FIG. 3B is a diagram showing an example of circuit attribute information according to the present invention.
- FIG. 3C is a diagram showing an example of circuit attribute information according to the present invention.
- FIG. 3D is a diagram showing an example of circuit attribute information according to the present invention.
- FIG. 3E is a diagram showing an example of circuit attribute information of the present invention.
- FIG. 3F is a diagram showing an example of circuit attribute information according to the present invention.
- FIG. 4A is a diagram showing a configuration of a video frame transmitted from the transmission apparatus of the present invention.
- FIG. 4B is a diagram showing a configuration of a video frame transmitted from the transmission apparatus according to the present invention.
- FIG. 5A is a diagram showing a configuration of a video frame transmitted from the transmitting apparatus according to the present invention.
- FIG. 5B is a diagram showing a configuration of a video frame transmitted from the transmitting apparatus according to the present invention.
- FIG. 6 is a block diagram showing a configuration of a transmitting device and a receiving device of the present invention.
- FIG. 7 is a diagram showing an example of a voice data ID.
- FIG. 8 is a block diagram showing an outline of the configuration of the present invention.
- FIG. 9 is a block diagram showing a configuration of the present invention.
- FIG. 10 is a diagram showing a signal configuration in the HDMI standard of the present invention.
- FIG. 11 is a diagram showing a configuration of a data island according to the present invention.
- FIG. 12 is a diagram showing a configuration of a data island packet according to the present invention.
- FIG. 13 is a diagram showing a configuration of a packet header of a data island according to the present invention.
- FIG. 14 is a diagram showing a configuration of PacketTypeValue of the present invention.
- FIG. 15 is a diagram showing a structure of data stored in the AVI of the present invention.
- FIG. 16 is a diagram showing the types of video formats of the present invention.
- FIG. 17 is a diagram showing the structure of SourceProductDescriptionlnfoFrame of the present invention.
- FIG. 1 is a block diagram showing configurations of a transmission device and a reception device according to Embodiment 1 of the present invention.
- the transmission device 100 includes a video signal source 101, a first high-quality image processing circuit 102, a control circuit 103, and a first recording unit 104.
- the receiving device 110 includes a second high-quality image processing circuit 111, a temporary storage unit 112, a comparison unit 113, a second recording unit 114, and a display device 115. It is configured.
- the video signal source 101 is generally composed of an MPEG decoder or the like, and outputs a baseband video signal.
- the first high image quality processing circuit 102 performs high image quality processing on the signal output from the video signal source 101.
- the control circuit 103 controls the operation of the first high image quality processing circuit 102.
- the first recording unit 104 stores first circuit attribute information on the transmission device 100 side.
- the temporary storage unit 112 is recorded in the first recording unit 104 and temporarily stores the first circuit attribute information.
- the second recording unit 114 stores second circuit attribute information of the receiving device 110.
- the comparison unit 113 compares the contents of the first circuit attribute information of the transmission device 100 stored in the temporary storage unit 112 with the contents of the second circuit attribute information.
- the second high image quality processing circuit 111 performs high image quality processing on the signal output from the first high image quality processing circuit 102.
- the display device 115 performs display.
- the transmitting device 100 is a set top box (STB) that receives a broadcast signal from a broadcasting station
- the receiving device 110 outputs a signal output from the STB.
- STB set top box
- the receiving device 110 is a combination of a television and the like. It should be noted that the present invention is not limited to these combinations, but may be any transmitting device 100 and receiving device 110 having the above-described configuration.
- the transmitting device 100 and the receiving device 110 are connected by HDMI (registered trademark) or the like so that digital signals can be transmitted and received.
- HDMI registered trademark
- the present invention is not limited to this, and transmission and reception of signals to be described later. Any wiring that can be used.
- FIG. 2A is an example of first circuit attribute information
- FIG. 2B is an example of second circuit attribute information.
- the first circuit attribute information and the second circuit attribute information are “IP conversion”, “Digital AI”, For information on functions such as “edge enhancement” and “color correction”.
- IP conversion”, “digital AI”, “edge enhancement”, “color correction”, etc. are functions related to predetermined items.
- the "Presence” column indicates the presence or absence of each of the above functions, "X” indicates that the function is provided, and "O” indicates the function. It shows that it is equipped.
- the column “ON / OFF ON / OFF” indicates whether or not each of the above-mentioned functions can be operated.
- Z is possible to stop. “Permitted” indicates that the function can be operated and Z-stopped. Z is not possible to stop It shows no. “-” In the “ON / OFF availability” column indicates that the function does not exist and ONZOFF switching itself cannot exist.
- video signal control will be described. However, the present invention is not limited to this, but it is also possible to control sound quality for an audio signal.
- the reception device 110 is recorded in the first recording unit 104 of the transmission device 100, and temporarily stores the contents of the first circuit attribute information.
- the comparison unit 113 compares the second circuit attribute information with the first circuit attribute information recorded in the second recording unit.
- the reception device 110 includes the temporary storage unit 112 and the comparison unit 113.
- the present invention is not limited to this, and is temporarily stored on the transmission device 100 side.
- the unit 112 and the comparison unit 113 may be provided.
- the first circuit attribute information is transferred when the transmitting device 100 and the receiving device 110 are connected.
- the present invention is not limited to this and the predetermined time It is also possible to pass the first circuit attribute information every time.
- the comparison unit 113 determines that the second high image quality processing circuit 111 on the receiving device 110 side should execute the IP conversion because there is no IP conversion function on the transmitting device 100 side. .
- the digital AI function exists in both the transmitting device 100 and the receiving device 110. The implementation of the digital AI function can be performed with a difference between the transmitting device 100 and the receiving device 110. Generally, however, the receiving device 110 side is expected to have a higher function. It is determined that the high image quality processing circuit 111 of the present invention should execute the AI function.
- the edge enhancement function exists in both the transmission device 100 and the reception device 110.
- the second image quality processing circuit 111 on the receiving apparatus 110 side cannot stop the edge enhancement function. Therefore, the comparison unit 113 determines that the second image quality processing circuit on the receiving device 110 side should perform the edge enhancement function.
- the color correction function both the transmitting device 100 and the receiving device 110 have a function. But shown in Figure 2A As described above, the first image quality processing circuit 102 on the transmission device 100 side cannot stop the color correction function. Therefore, the comparison unit 113 determines that the first high image quality processing circuit 102 on the transmission apparatus 100 side should execute the color correction function.
- One output of the comparison unit 113 is connected to the second high image quality processing circuit 111, and acts to execute the function determined by the above-described process.
- the other output of the comparison unit 113 is connected to the control circuit 103 that controls the first high-quality image processing circuit 102.
- the control circuit 103 acts to enable the function of the first high-quality image processing circuit 102 with respect to the function determined to be executed on the transmitting apparatus 100 side in the above-described process.
- the high image quality processing in the system in which the transmission device 100 and the reception device 110 are connected is performed by the above processing even when a plurality of devices are connected and the same processing circuit is duplicated. None do.
- the above processing makes it possible to select an optimum circuit for processing. In this way, it is possible to perform operations that make full use of the performance of the redundant system and insufficient processing.
- the power described in the image quality correction processing for the video signal included in the input broadcast wave is not limited to this.
- the present invention is not limited to this.
- the present invention can also be applied to sound quality correction processing for included audio signals and signal correction processing for data signals included in input broadcast waves.
- FIG. 3A shows an example of the contents of the first circuit attribute information of transmitting apparatus 100 in Embodiment 2
- FIG. 3B shows an example of the contents of the second circuit attribute information of receiving apparatus 110 in Embodiment 2. is doing.
- IP conversion “digital AI”, “edge enhancement”, “color correction”, etc. are functions related to predetermined items.
- the temporary storage unit 112 and the comparison unit 113 are replaced with the receiving device 110.
- the transmission apparatus 100 may be provided with the temporary storage unit 112 and the comparison unit 113.
- the circuit attribute information is exchanged when the transmitting device 100 and the receiving device 110 are connected.
- the present invention is not limited to this, and the circuit is provided every predetermined time. It is also possible to exchange attribute information.
- the comparison unit 113 when the comparison unit 113 performs the comparison, for example, when the digital AI function can be ONZOFF controlled by either the transmission device 100 or the reception device 110, a criterion for determining whether to select a deviation Is not necessarily clear.
- the second embodiment by defining the superiority of functions by level, it is possible to select a circuit that processes each function with higher performance.
- FIG. 3A the “Presence” column in FIG. 2A is replaced with the “Level” column
- FIG. 3B the “Presence” column in FIG. 2B is replaced with the “Level” column
- Figures 3C to 3F are examples of the definition of “level”.
- a level of “0” indicates that the function is not being executed. The level indicates that the processing becomes higher performance in the order of “1” “2” “3”.
- Fig. 3C is a table showing the level of ⁇ IP conversion ''
- Fig. 3D is a table showing the level of ⁇ Digital AI ''
- Fig. 3E is a table showing the level of ⁇ Edge enhancement ''
- Serial numbers are assigned to the comparison algorithms of the comparison units of the transmitting device 100 and the receiving device 110 at the time of manufacture.
- This serial number is stored in, for example, a memory inside the comparison unit 113.
- This memory is composed of, for example, a nonvolatile memory.
- serial numbers not only the serial numbers but also the shipping date can be stored in the above-mentioned memory in case the serial numbers cannot be compared due to differences in manufacturers.
- the high image quality processing in the system in which the transmission device 100 and the reception device 110 are connected is a case where a plurality of devices are connected and the same processing circuit is duplicated.
- the level information without performing duplicate processing it becomes possible to select and process an optimum circuit in more detail. In this way, it is possible to operate with the system performance effectively without duplication or lack of processing.
- the power described in the image quality correction processing for the video signal included in the input broadcast wave is not limited to this.
- the present invention is not limited to this.
- the present invention can also be applied to sound quality correction processing for included audio signals and signal correction processing for data signals included in input broadcast waves.
- FIGS. 1, 4A, and 4B are explanatory diagrams for explaining Embodiment 3 of the present invention.
- a block diagram of the present invention according to Embodiment 3 uses FIG.
- the transmitter / receiver in the third embodiment has the same contents of the first circuit attribute information and the second circuit attribute information in FIG. 1 as those in the first embodiment.
- FIG. Superimpose specific information on the period.
- Embodiment 3 will be described with reference to FIGS. 1, 4A, and 4B.
- a video signal has a video power of about 30 frames or about 25 frames per second.
- Fig. 4A shows a 1080i signal as an example.
- a 1080i signal consists of 2200 horizontal pixels and 1125 vertical lines per frame.
- the effective screen 142 has horizontal 1920 pixels and vertical 1080 lines, and the other area has a blanking period 143.
- this blanking period 143 is useful for maintaining screen synchronization between transmission and reception.
- the blanking period 143 is redundant, information can be transmitted using the blanking period 144.
- the data inserted in this blanking period 143 is the packet 141 Since it takes a form, if a new identification number is assigned to the packet 141, various information can be transmitted in the form of the same packet 141.
- the microcomputer recognizes whether most of the frames output at a certain time are a force that is a still screen such as an on-screen display display, or a normal moving image screen. Therefore, the microcomputer can transmit information about whether the frame is a still image or a moving image to the receiving apparatus 110 side using the packet 141. Since it is obvious that there is a microcomputer that controls the system, the microcomputer is not clearly shown in Fig. 1. In the third embodiment, as shown in FIG. 4B, if the information transmitted in the packet 141 is “0”, it is “still image”, and if “1”, it is “moving image”. .
- the receiving apparatus 110 If the information that the frame is a still image is obtained from the packet 141, the receiving apparatus 110 operates to treat the frame as a still image and perform high image quality processing in the process of internal signal processing. .
- the second high image quality processing circuit 111 inside the receiving apparatus 110 also generally determines whether the frame is a still image or a moving image. Therefore, it is possible to comprehensively judge the information obtained from the knot 141, instead of using it as it is. In this way, the second high image quality processing circuit 111 can adaptively execute processing.
- the power described in the image quality correction processing for the video signal included in the input broadcast wave is not limited to this.
- the present invention is not limited to this.
- the present invention can also be applied to sound quality correction processing for included audio signals and signal correction processing for data signals included in input broadcast waves.
- the block diagram according to the fourth embodiment is the same as FIG.
- the contents of the first circuit attribute information and the second circuit attribute information in FIG. 1 are the same as those in the first to third embodiments.
- specific information is given to the blanking period 153 of the video frame.
- the superposition as the packet 151 is the same as in the third embodiment.
- the content transmitted in the packet 151 is different from the content transmitted in the packet 141.
- FIG. 5A shows the structure of frame 150.
- FIG. 5A only the parts different from FIG. 4A will be described, and description of parts similar to FIG. 4A will be omitted.
- the resolution of a material may change over time.
- the resolution is output at the changed resolution, the screen flickers for several tens of milliseconds until the display device 115 physically synchronizes with the display device 115 for several hundred milliseconds. There is. If the screen flickers, it is uncomfortable for the viewer.
- the resolution output from the transmitter 100 may be set to be constant. In this case, when applying a high-quality processing circuit on the receiving device 110 side, it is better to know what the resolution was before the transmission device 100 converted and what the converted resolution is. Tie.
- the correspondence between “original resolution” and “output resolution” as shown in FIG. 5B is coded and defined as a mode value.
- the mode value is transmitted in the retrace period 153.
- FIG. 5B is a table showing a definition example of the mode. For example, if the resolution of “original” is “480i” and the resolution of “output” is “1080i”, the mode code is “0”. When the resolution of “original” is “720pj and the resolution of“ output ”is“ 1080i ”, the mode code is“ 1 ”. If the “original” resolution is “1080i” and the “output” resolution is “1080i”, the mode code is “2”.
- the transmitting device 100 side knows the original resolution, and the receiving device 110 has no component in the original resolution.
- the mechanism as described above it is possible to notify the receiving apparatus 110 side of the original resolution known to the transmitting apparatus 100 side. Therefore, it is useful for applying high image quality processing in the second high image quality processing circuit 111 on the receiving apparatus 110 side, and as a result, high quality display can be obtained.
- the power described in the image quality correction processing for the video signal included in the input broadcast wave is not limited to this.
- the present invention is not limited to this.
- the present invention can also be applied to sound quality correction processing for included audio signals and signal correction processing for data signals included in input broadcast waves.
- the block diagram in the fifth embodiment of the present invention is the same as the block diagram in the fourth embodiment, but the content transmitted in the power packet 153 is different.
- the display panel of the display device 115 may not have a physically normal horizontal 1920 pixels as the number of display panel pixels, and may have a number of pixels smaller than that. is there.
- horizontal 1280 pixels This is the case, for example, when displaying a bitmap pattern generated by computer graphics such as an electronic program guide.
- the transmission load from the transmission device 100 to the reception device 110 is also reduced.
- receiving apparatus 110 further includes “display panel resolution” in the first circuit attribute information. Further, the transmitting apparatus 100 obtains the resolution information of the display panel of the display device 115 via a low-speed signal line independent of the video / audio transmission path. Thus, when the currently output video frame is a bitmap pattern such as an electronic program guide, the transmitting apparatus 100 outputs the display panel 115 with the resolution of the display panel. Power! In addition, the transmitting apparatus 100 acts to notify the receiving apparatus 110 that the packet 151 (or packet 141) in the blanking period 153 (or blanking period 143) is being output at the same resolution at the same time.
- the power described in the image quality correction processing for the video signal included in the input broadcast wave is not limited to this.
- the present invention is not limited to this.
- the present invention can also be applied to sound quality correction processing for included audio signals and signal correction processing for data signals included in input broadcast waves.
- FIG. 6 is a block diagram of a transmission / reception apparatus according to Embodiment 6 of the present invention.
- the transmission device 600 includes an audio signal source 601, a first microcomputer 602, and an audio data generation unit 603.
- the receiving apparatus 610 includes a synthesizing unit 611, a sound output device 612, a temporary storage unit 613, and a control unit 614.
- the audio signal source 601 generally outputs a baseband audio signal composed of an MPEG decoder or the like.
- the first microcomputer 602 controls the transmission device 600.
- the voice data generation unit 603 generates preset voice data.
- Temporary storage unit 613 stores audio data from audio data generation unit 603 in transmission device 600 in advance.
- the control unit 614 controls whether or not the output of the temporary storage unit 613 is combined.
- FIG. 7 is a diagram showing an example of the contents of the audio data generation unit 603.
- the audio signal source 601 also decodes audio with radio wave power such as broadcasting and outputs a baseband audio signal.
- a copy of the audio data of the audio data generation unit 603 is stored in advance in the temporary storage unit 613 via a low-speed signal line.
- FIG. 7 is a table showing the relationship between audio data whose IDs are stored in advance in temporary storage section 613 and ID numbers.
- the audio data “Please select the recording start time” is recorded with the ID number “1”
- the audio data “Please select the recording time” is recorded with the ID number “2”.
- the voice data is recorded with the ID number “3” for “Please press OK if you like”.
- the first microcomputer 602 does not send audio data from the transmission device 600, but the ID number is sent to the reception device 610 through the low-speed signal line.
- Receiving device 610 calls audio data to be reproduced based on the ID number from temporary storage unit 613, synthesizes it by synthesizing unit 611, and outputs it to sound output device 612.
- the reception device 610 can superimpose the audio data without superimposing the audio data on the signal from the audio signal source 601.
- this configuration does not require decoding and recompression, and thus enables high-quality sound transmission.
- HDMI registered trademark
- FIGS. 8, 10 and 11 used to describe the HDMI standard are the High Definition Multimedia Interface “Speciiication Version 0.9” and “Specification Version 1.0” [Specification Version 1. 1 ”quotes. Therefore, a detailed description of these individual drawings is omitted, and only parts related to the present invention will be described.
- FIG. 8 is a block diagram showing the configuration of HDMI Source800A and HDMI Sink900A configured according to the HDMI standard.
- the HDMI Source 800A is provided in the transmission device 100 of FIG. 1 or the transmission device 600 of FIG. 6, and the HDMI Sink 900A is provided in the reception device 110 of FIG. 1 or the transmission device 610 of FIG.
- HDMI Source800A and HDMI Sink900A are connected by "Channell” to "Channel4", "TMDS Clock ChannelJ” and “DDC (Display Data Channel)” of TMDS (Transition Minimized Differential Signaling).
- the HD MI cable and connector 1000 are connected by four differential signal lines 1002 to a differential signal line 1008.
- TMDS data is transmitted from three differential signal lines 1002 (“TMDS Channel 0”) via differential signal line 1006 (“TMDS Channel 2”).
- Clock information is transmitted through the signal line 1008 (“TMDS Clock Channel”).
- These differential signal lines 1002 transmit video, audio and control signals (auxiliary data) through the differential signal line 1008.
- the HDMI transmitter 850 (denoted as HDMI Transmitter in FIG. 8) receives a video signal (denoted as Video in FIG. 8) and an audio signal (denoted as Audio in FIG. 8), and receives a control signal (denoted in FIG. 8). Input / output ControlZStatus). Further, the HDMI transmission unit 850 transmits the above-described TMDS data and clock information.
- the HDMI receiver 950 (denoted as HDMI Receiver in FIG. 8) outputs a video signal (denoted as Video in FIG. 8) and an audio signal (denoted as Audio in FIG. 8), and outputs a control signal (denoted as Represented in FIG. 8). 8) Input / output “ControlLZStatus”. Further, the HDMI receiving unit 950 receives the above-described TMDS data and clock information.
- the transmitted video data can be encoded in any of the formats “RGB”, “YCbCr4: 4: 4”, or “YCbCr4: 2: 2”.
- RGB is a video format composed of red, green and blue components.
- YCbCr4: 4: 4 is a video format composed of a luminance component and two color difference components, and a sampling frequency ratio of the luminance component and the two color difference components is 4: 4: 4.
- “YCbCr4: 2: 2” is composed of a luminance component and two color difference components, and is a video format with a sampling frequency ratio of 4: 2: 2 between the luminance component and the two color difference components.
- the differential signal line 1008 that transmits clock information transmits a video signal clock.
- This video signal clock is used to process TMDS data transmitted from the three differential signal lines 1002 to the differential signal line 1006 described above.
- HDMI Source800A and HD MI Sink900A are connected by a differential signal line 1010 that transmits “DDC”. With this differential signal line 1010, information such as the configuration and the state of each is exchanged between the HDMI Source 800A and the HDMI Sink 900A.
- the differential signal line 1012 which is the “CEC Line”, makes it possible to realize advanced control functions between multiple types of video / audio equipment.
- HDMI Source 800 A and HDMI Sink 900 A configured according to the HDMI standard shown in FIG. 8 will be described in more detail.
- HDMI-compatible STB800B as HDMI Source800A HDMI Si A description will be given using an HDMI-compatible TV900B as nk900A.
- the STB800B for HDMI will be described first.
- the RGB video signal 803 input from the terminal 802 the audio signal 805 input from the terminal 804, and the control signal 807 input from the terminal 806 are combined in the multiplexing circuit 808.
- the time multiplexing is a method of multiplexing the audio signal 805 and the control signal 807 that are time-axis-compressed in the video blanking period (return line period), and the video / audio multiplexed signal 809 is formed by this time multiplexing.
- the video / audio multiplexed signal 809 is encrypted by the HDCP encryption circuit 810 and subjected to copy guard.
- the HDCP encryption circuit 810 receives a key signal from the first HDCP key generation unit 812 as necessary, and performs encryption.
- the encrypted signal is input to the TMDS transmission circuit 814, converted into 10 bits, TMDS encoded, differential serialized, and transmitted via the HDMI connection terminal 816.
- the differential signal line 1002 is “TMDS Channel 0” and transmits a B signal (blue signal), and the differential signal line 1004 is “TMDS Channel 1” and transmits a G signal (green signal).
- the differential signal line 1 006 is “TMDS Channel 2” and transmits the R signal (red signal).
- the differential signal line 10 08 is “TMDS Clock Channel” and transmits Clock (clock signal).
- HDCP key information and EDro information are transmitted / received via the HDMI connection terminal 816 and the HDMI connection terminal 902 via the I2C node of the differential signal line 1010 of the DDC (Display Data Channel) line.
- the EDID 904 is a storage device such as a ROM that stores EDro information such as a signal format allowed by the display.
- the EDro information is read by the second microcomputer 818 of the STB800B for HDMI as necessary. More specifically, the second microcomputer 818 detects that the HDMI-compatible STB 800B is connected to the HDMI-compatible TV 900B, and reads the EDHD information stored in the EDID 904.
- the HDMI compatible TV 900B will be described in detail.
- Three video signals (R signal, G signal, and B signal) and one clock signal input to the HDMI compatible TV900B are input to the TMD S receiving circuit 906. These input signals are converted into 8-bit RGB video signals after being subjected to normal real time and TMDS decoding and 10Z 8-bit conversion.
- the restored 8-bit RGB video signal is decrypted by the HDCP decryption circuit 908,
- the video signal extraction circuit 910, the audio signal extraction circuit 912, the control signal extraction circuit 914, and the knot discrimination circuit 926 are input.
- the HDCP decryption circuit 908 transmits the key information from the second HDCP key generation unit 916 to the HDM I-compatible STB800B, and after the HDMI-compatible STB800B verifies, the encryption is performed. Canceled.
- the control signal extraction circuit 914 extracts the control signal 807 that is superimposed on the video blanking period (return line period), and the control signal 807 is input to the third microcomputer 918.
- the video signal extraction circuit 910 supplies the RGB video signal to the TV display unit 920.
- an OSD signal can be added to the RGB video signal by controlling the third microcomputer 918 by providing an OSD-attached circuit or the like.
- the audio signal extraction circuit 912 extracts the audio signal 805 superimposed on the video blanking period (return line period), and the extracted audio signal 805 is converted into a DZA converter (digital analog signal) by the DZA converter 922. Converted) and supplied to the audio output unit 924.
- a DZA converter digital analog signal
- Figure 10 shows an example of an SD screen where the entire screen is 858 pixels wide and 525 lines long, and the effective screen is 720 pixels wide and 480 lines high.
- the vertical blanking period (vertical blanking period) is 45 lines, and the horizontal blanking period (horizontal blanking period) is 138 pixels.
- the TMDS Period is composed of the Control Period, Data Island Period, and Video Data Period forces. Packet data is transmitted during this data island period. Packet data consists of audio samples (audio signals) and Info frames (information attached to signals). Thus, the audio signal is transmitted using the data island period existing in the video blanking period (returning period).
- Packets transmitted on the data island can be identified (packet type) by the packet header (Packet Headerl and Packet Header2 in Fig. 11), and transmitted by bit 2 of channel 10 of the TMDS signal.
- BCH block4 32-bit data (BCH block4) transmitted by D2 of hannelO is composed of ByteO (HBO), Bytel (HB1), Byte2 (HB2), and NOR for every 8 bits. Up to HB2 is called a packet header. As shown in FIG. 13, HBO indicates a packet type, and HB1 and HB2 indicate packet-specific data.
- the bits of Channel 1 and Channel 2 are rearranged in order every 8 bits (1 byte) to form a packet body (PB).
- BCHblockO is configured by adding the Channell DO, Channel2 DO, and 8 NOR bits.
- BCHblockl is composed of D1 of Channell, D1 of Channel2 and the NORITY bit.
- BCHblock2 is composed of D2 of Channell, D2 of Channel2, and NORITIVIT.
- BCHblock3 is composed of D3 of Channell, D3 of Channel2 and the NORITY bit.
- BCHblockl is composed of SubpacketO that also has ByteO to Byte6 power and parity bits
- PacketBody is composed of ByteO to Byte6 in BCHblockl-3.
- the data island is composed of a packet header composed of HB0 to HB2 and a packet body and parity bits composed of BCHblockl to block4.
- FIG. 12 shows the structure of the packet header of the data island packet.
- the packet header is composed of 24-bit data and 8-bit BCH ECC (Error Correction Code) parity. Of these, 8 bits indicate the packet type described later in the HBO, and the remaining 16 bits are used to indicate packet-specific data.
- BCH ECC Error Correction Code
- the packet type in HB0 will be described in detail.
- the packet type value 0x80 stores an EIA / CEA-861B InfoFrame packet.
- AVI Alternative Video Information
- Information to be transmitted for each DataByte is determined as shown in FIG.
- DataBytel has overscan (for TV) 'underscan (for computer) information
- DataByte2 has aspect ratio information
- DataByte4 has video format information (34 types from 480p to 1080p). Classes are defined in the code. See Figure 16. ) Etc. are transmitted.
- the information product type 0x83 contains Source Product Descriptor InfoFrame S, and the information to be transmitted for each DataByte is determined as shown in FIG. For example, from DataBytel to 8, Vendor, name. Character (vendor name) information is stored with up to 8 characters. When the OSD is displayed, if the company name is longer than 8 characters, the complete company name is output with an 8-character address as a complement to the OSD circuit (not shown) so that the company name can be complemented and displayed. A configuration having storage means may be adopted. Data Byte 9 to 24 contain Product. Descript. Character (modern number) information.
- Embodiments 1 and 2 of the present invention image quality control information in HDMI Source800A and HDMI Sink900A is communicated via differential signal line 1012 which is the CEC line in Figs. To do.
- the second microcomputer 818 of the HDMI-compatible STB800B shown in FIG. 9 transmits the first circuit attribute information in the HDMI-compatible STB800B via the HDMI connection terminal 816 to the differential signal line 1012 that is the CEC line, and the HDMI It is transferred to the HDMI connection terminal 902 of the corresponding TV900B.
- this transferred information is compared with the second circuit attribute information in the HDMI-compatible TV 900B using the third microcomputer 918.
- the first circuit attribute information and the second circuit attribute information By comparing the first circuit attribute information and the second circuit attribute information, it is possible to compare the image quality processing capabilities of the HDMI-compatible STB800B and the HDMI-compatible TV900B. As a result, for the video signal input to the HDMI-compatible STB800B, it is possible to determine whether the above-mentioned IP conversion, edge enhancement, and color correction are to be processed with a shift between the HDMI-compatible STB800B and the HDMI-compatible TV900B.
- the video signal is processed by the first high-quality image processing circuit (not shown in FIGS. 8 and 9) included in the HDMI-compatible STB800B, it is as follows.
- the video signal processing is performed by the HDMI compatible STB800 B on part of the signal transmitted via the HDMI connection terminal 816, information indicating that the video signal processing is unnecessary on the HDMI compatible TV 900B side is transmitted. It is possible.
- Information on the necessity of processing of this video signal can be inserted into “0) 111; 1:01 Period” of “TMDS” described above, and transferred through the differential signal line 1012 which is a CEC line. It is also possible to [0083]
- the image quality control for the video signal has been described.
- the present invention is not limited to this and can be applied to the sound quality control for the audio signal. .
- the example has been described in which the image quality and the sound quality of the video signal and the audio signal are determined based on the circuit attribute information.
- the present invention is not limited to this.
- a plurality of display devices 115 are displayed. It is also possible to display a pattern and ask the user to make a selection. This makes it possible to provide a method for controlling the image quality and sound quality desired by the user.
- Embodiment 3 and Embodiment 4 of the present invention the still picture or moving picture information and coordinate information in Embodiment 3 are inserted into the Control Period of TM DS Period in Fig. 10 described above. . Further, the resolution information in Embodiment 4 is inserted into the Control Period of the TMDS Period in FIG. 10 described above.
- the “Video Code” column indicates the code of the video format.
- the “Vid eo Description” column indicates the video format.
- the “Values” column shows the pixel repetition rules in the EIAZCEA-86 standard. "HDMI
- the “Pixel Repeat Values” column shows the provisions for pixel repeat in the HDMI standard.
- Each video format in the “Video Description” column is displayed in the order of “effective horizontal pixel number” “X” “number of effective lines and scanning method” “@” “field frequency (or frame frequency)”.
- “effective number of horizontal pixels” is 640 pixels
- “effective number of lines and scanning method” is 480 lines
- progressive scanning method is 480 lines
- “field frequency (or frame frequency)” "Indicates 60Hz.
- the power described in the image quality correction processing for the video signal included in the input broadcast wave is not limited to this.
- the present invention is not limited to this.
- the present invention can also be applied to sound quality correction processing for included audio signals and signal correction processing for data signals included in input broadcast waves.
- the differential signal line 1012 that is a CEC line
- a new audio signal is added to the input audio signal 805 on the transmission device 600 side. It is possible to output desired audio data on the receiving device side without adding the.
- the video / audio signal processing method and transmission / reception apparatus of the present invention communicate on the transmission side and the reception side via a bidirectional signal line and transmit a control signal synchronized with video and audio.
- a bidirectional signal line and a few control circuits By adding a bidirectional communication line and a few control circuits, optimal control of the entire system can be performed with frame accuracy.
- the transmission device, the reception device, and the transmission / reception device of the present invention can share circuit attribute information between the transmission side and the reception side, for example, by communicating between the transmission side and the reception side via a bidirectional signal line. . Therefore, the transmission device, the reception device, and the transmission / reception device of the present invention are useful for constructing a transmission / reception system with high image quality and high sound quality.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Systems (AREA)
Abstract
Description
Claims
Priority Applications (4)
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EP07737644A EP1995952A4 (en) | 2006-03-03 | 2007-03-02 | TRANSMITTER DEVICE, RECEIVER DEVICE, AND TRANSCEIVER / RECEIVER DEVICE |
JP2008503819A JP4674637B2 (ja) | 2006-03-03 | 2007-03-02 | 送信装置、受信装置および送受信装置 |
US12/281,056 US8532467B2 (en) | 2006-03-03 | 2007-03-02 | Transmitting device, receiving device and transmitting/receiving device |
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2007
- 2007-03-02 WO PCT/JP2007/053995 patent/WO2007102413A1/ja active Application Filing
- 2007-03-02 CN CN2007800075487A patent/CN101395904B/zh not_active Expired - Fee Related
- 2007-03-02 EP EP07737644A patent/EP1995952A4/en not_active Ceased
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Also Published As
Publication number | Publication date |
---|---|
CN101395904B (zh) | 2012-07-18 |
EP1995952A1 (en) | 2008-11-26 |
EP1995952A4 (en) | 2010-05-19 |
US20090046993A1 (en) | 2009-02-19 |
CN101395904A (zh) | 2009-03-25 |
US8532467B2 (en) | 2013-09-10 |
JP4674637B2 (ja) | 2011-04-20 |
JPWO2007102413A1 (ja) | 2009-07-23 |
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