CN107396003A - A kind of DP signal distributors and DP system for delivering - Google Patents
A kind of DP signal distributors and DP system for delivering Download PDFInfo
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- CN107396003A CN107396003A CN201710749884.4A CN201710749884A CN107396003A CN 107396003 A CN107396003 A CN 107396003A CN 201710749884 A CN201710749884 A CN 201710749884A CN 107396003 A CN107396003 A CN 107396003A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a kind of DP signal distributors, including DP signal input circuits, signal distribution circuit, first DP signal output apparatus, 2nd DP signal output apparatus and power module, wherein, the output end of described DP signal input circuits is connected with the input of described signal distribution circuit, input of the output end of the signal distribution circuit respectively with the first DP signal output apparatus and the 2nd DP signal output apparatus is connected, the power module respectively with the DP signal input circuits, signal distribution circuit, first DP signal output apparatus and the connection of the 2nd DP signal output apparatus.Present invention also offers a kind of DP system for delivering.The beneficial effects of the invention are as follows：The DP signal distributors of a kind of low cost, stable performance, high bandwidth are provided, the DP high-definition video signals of input can be converted into the DP signal outputs that two-way is consistent, synchronous with audio signal.
Description
Technical field
The present invention relates to signal distributor, more particularly to a kind of DP signal distributors and DP system for delivering.
Background technology
DisplayPort is by VESA（VESA）The display interface agreement of issue.As taking over sb.'s job for DVI
Person, DisplayPort is compared to the advantage for possessing several protrusions for DVI.First, DisplayPort is meeting HD video
The support to high definition audio signal transfer functions is added while signal transmission demand.Secondly, it possesses unidirectional, four links and connected
Ability is connect, transmission rate is up to 21.6Gbps（DisplayPort1.2 versions）, thus it is higher to the transmission quality of vision signal,
Support higher resolution ratio and refresh rate.Finally, because of Application of Interface pattern inside and outside its compatibility and comprising one group of bandwidth up to 1Mbps's
Accessory channel, so possess stronger peripheral equipment integration ability.In addition, the high-performance being widely used compared to another kind
For multimedia interface HDMI, DisplayPort is wide-open, and user develops any expense that need not pay to it, thus
Greatly reduce application cost.In today of high-definition media interface application technology high speed development, DisplayPort interfacings
Just increasingly favored with its above-mentioned advantage by market.The high-performance multimedia of increasing compatible DP interfacings is whole
End equipment has been used in every field.
In high-definition digital multimedia application system, generally require multiple digital multimedia terminals and export same high-definition digital
The information that multi-media signal source is sent, for example, HD video terminal display place, commercial advertisement broadcasting etc., Normal practice is
A video signal source is configured for each display terminal, so both adds system cost, greatly reduce system again can
By property.
Therefore, the deficiency in the presence of the application of identical multi-media signal is received for above-mentioned multiple terminals, with reference to
DisplayPort interfacings, the high-definition multimedia signal distributor for researching and developing a kind of low cost, stable performance and high bandwidth have
Good realistic meaning.
The content of the invention
In order to solve the problems of the prior art, the invention provides a kind of cost is low, the DP of stable performance and high bandwidth
Signal distributor and DP system for delivering.
The invention provides a kind of DP signal distributors, including DP signal input circuits, signal distribution circuit, the first DP to believe
Number output circuit, the 2nd DP signal output apparatus and power module, wherein, the output end of described DP signal input circuits and institute
The input connection for the signal distribution circuit stated, the output end of the signal distribution circuit respectively with the first DP signal outputs
The input of circuit and the 2nd DP signal output apparatus connects, and the power module inputs electricity with the DP signals respectively
Road, signal distribution circuit, the first DP signal output apparatus and the connection of the 2nd DP signal output apparatus, DP input signals are via described
DP signal input circuits are cloned into two identical DP signals and via the first DP after entering the signal distribution circuit
Signal output apparatus and the 2nd DP signal output apparatus are exported to upstream device.
As a further improvement on the present invention, the input termination DC24V power supplies of the power module, the DP signals input
The input of circuit is connected with DP signal sources, the output end of the first DP signal output apparatus and the 2nd DP signal output apparatus
It is connected with DP upstream devices.
As a further improvement on the present invention, the signal distribution circuit includes carrying out the video and audio signal of input
The front-end module of data recovery, DP receivers and cloning module, transmitter module, the transmitter module include the first DP transmittings
Device and the 2nd DP transmitters, the output end of described DP signal input circuits are connected with the input of described front-end module, institute
The output end for stating front-end module is connected with the input of institute's DP receivers and cloning module, the DP receivers and cloning module
Output end is connected with the first DP transmitters, the 2nd DP transmitters respectively, and the DP receivers and cloning module will receive
The packet of front-end module be converted into video raster data flow and audio sample and for cloning, and by two groups of numbers after clone
Two DP mono signal packets, which are encoded into, according to stream and audio sample is sent respectively to the first DP transmitters, the 2nd DP transmitters
For serializing and transmitting.
As a further improvement on the present invention, the signal distribution circuit also includes the first HDCP modules, the 2nd HDCP moulds
Block and the 3rd HDCP modules, wherein, the first HDCP modules are connected with the front-end module, the 2nd HDCP modules and institute
The connection of the first DP transmitters is stated, the 3rd HDCP modules are connected with the 2nd DP transmitters, and the first HDCP modules are used
It is decrypted in the DP signals to inputting the front-end module, the 2nd HDCP modules, the 3rd HDCP modules are respectively by described in
First DP transmitters, the 2nd DP transmitters transmission data exported before encryption.
As a further improvement on the present invention, the signal distribution circuit also includes OCM modules, wherein, the OCM modules
It is connected respectively with the DP receivers and cloning module, transmitter module.
As a further improvement on the present invention, the DP signal input circuits, the first DP signal output apparatus, the 2nd DP letters
Number output circuit is respectively connected with DP terminals, and the surface of the DP terminals is provided with Gold plated Layer, and the thickness of the Gold plated Layer is more than 10 μ,
" AUX+ " pin and " AUX- " pin of the DP signal input circuits are connected with buffer in the same direction.
Present invention also offers a kind of DP system for delivering, it is characterised in that comprises the following steps：
S1, signal input, by DP input signals via DP signal input circuit input signal distributor circuits；
S2, signal distribution, DP input signals are cloned into two identical DP output signals by signal distribution circuit；
S3, signal output, by two identical DP output signals respectively via the first DP signal output apparatus and the 2nd DP signals
Output circuit is exported to upstream device.
As a further improvement on the present invention, step S2 includes：By front-end module by the video and audio signal of input
Data recovery is carried out, by DP receivers and packet is converted into cloning module into video raster data flow and audio sample is used in combination
In clone, and by two group data streams after clone and audio sample be encoded into two DP mono signal packets be sent respectively to it is described
First DP transmitters, the 2nd DP transmitters；Step S3 includes：The first DP transmitters, the 2nd DP transmitters are by DP mono signals
Packet is used to serialize and export.
As a further improvement on the present invention, the DP signals for inputting the front-end module are carried out by the first HDCP modules
Decryption, the number for respectively being transmitted the first DP transmitters, the 2nd DP transmitters by the 2nd HDCP modules, the 3rd HDCP modules
According to the encryption before being exported, by OCM modules to DP receivers and cloning module, the first DP transmitters, the 2nd DP transmitters
Initialized, firmware is provided for DP receivers and cloning module, the first DP transmitters, the 2nd DP transmitters by OCM modules
Driver.
As a further improvement on the present invention, when the input and output side of the DP signal distributors is connected to DP signals respectively
When source and DP upstream devices, the first DP transmitters first pass through the EDID for reading downstream DP upstream devices and enter line link and undergo training
Be initially completed and shaken hands with DP upstream devices, then will generation DPCD information replicate after be sent to the 2nd DP transmitters with
Make the first DP transmitters, the DPCD information of the 2nd DP transmitters consistent, so that the DP receivers and cloning module are obtained
DP output signals clone needed for characteristic information, finally by identical DPCD be sent to the front-end module be used for complete input
Shake hands at end.
The beneficial effects of the invention are as follows：The DP signal distributors of a kind of low cost, stable performance, high bandwidth are provided, can
So that the DP high-definition video signals of input are converted into the DP signal outputs that two-way is consistent, synchronous with audio signal.
Brief description of the drawings
Fig. 1 is a kind of structural representation of DP signal distributors of the present invention.
Fig. 2 is a kind of principle schematic of the DP signal input circuits of DP signal distributors of the present invention.
Fig. 3 is a kind of principle schematic of the DP signal input circuits of DP signal distributors of the present invention.
Fig. 4 is a kind of principle schematic of the signal distribution circuit of DP signal distributors of the present invention.
Fig. 5 is a kind of principle schematic of first DP signal output apparatus of DP signal distributors of the present invention.
Fig. 6 is a kind of principle schematic of first DP signal output apparatus of DP signal distributors of the present invention.
Fig. 7 is a kind of principle schematic of 2nd DP signal output apparatus of DP signal distributors of the present invention.
Fig. 8 is a kind of principle schematic of 2nd DP signal output apparatus of DP signal distributors of the present invention.
Fig. 9 is a kind of principle schematic of the power module of DP signal distributors of the present invention.
Figure 10 is a kind of master chip Splitter4320 of DP signal distributors functional block diagram of the present invention.
Embodiment
The invention will be further described for explanation and embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 10, a kind of DP signal distributors, including DP signal input circuits 1, signal distribution circuit 2,
One DP signal output apparatus 3, the 2nd DP signal output apparatus 4 and power module 5, wherein, described DP signal input circuits 1
Output end is connected with the input of described signal distribution circuit 2, and the output end of the signal distribution circuit 2 is respectively with described
The input of one DP signal output apparatus 3 and the 2nd DP signal output apparatus 4 connect, the power module 5 respectively with institute
DP signal input circuits 1, signal distribution circuit 2, the first DP signal output apparatus 3 and the 2nd DP signal output apparatus 4 is stated to connect,
DP input signals are cloned into two identical DP after entering the signal distribution circuit 2 via the DP signal input circuits 1
Signal is simultaneously exported to upstream device via the first DP signal output apparatus 3 and the 2nd DP signal output apparatus 4.
As shown in Figures 1 to 10, the input termination DC24V power supplies of the power module 5, the DP signal input circuits 1
Input be connected with DP signal sources, the output end of the first DP signal output apparatus 3 and the 2nd DP signal output apparatus 4 connects
It is connected to DP upstream devices.
As shown in Figures 1 to 10, the signal distribution circuit 2 includes master chip Splitter4320, the master chip
Splitter4320 includes carrying out the video and audio signal of input front-end module 21, DP receivers and the clone of data recovery
Module 22, transmitter module 23, the transmitter module 23 includes the first DP transmitters 24 and the 2nd DP transmitters 26, described
The output end of DP signal input circuits 1 is connected with the input of described front-end module 21, the output end of the front-end module 21
Be connected with the input of institute's DP receivers and cloning module 22, the output end of the DP receivers and cloning module 22 respectively with institute
State the first DP transmitters 24, the 2nd DP transmitters 25 connect, the front end mould that the DP receivers and cloning module 22 will receive
The packet of block 21 is converted into video raster data flow and audio sample and for cloning, and by two group data streams after clone and
Audio sample is encoded into that two DP mono signal packets are sent respectively to the first DP transmitters 24, the 2nd DP transmitters 25 are used
In serialization and transmission.
As shown in Figures 1 to 10, the signal distribution circuit 2 also includes the first HDCP modules 26, the 2nd HDCP modules 27
With the 3rd HDCP modules 28, wherein, the first HDCP modules 26 are connected with the front-end module 21, the 2nd HDCP modules
27 are connected with the first DP transmitters 24, and the 3rd HDCP modules 28 are connected with the 2nd DP transmitters 25, and described
One HDCP modules 26 are used to the DP signals for inputting the front-end module 21 be decrypted, the 2nd HDCP modules the 27, the 3rd
HDCP modules 28 data that the first DP transmitters 24, the 2nd DP transmitters 25 transmit are exported respectively before encryption.
As shown in Figures 1 to 10, the signal distribution circuit 2 also includes OCM modules 29, wherein, the OCM modules 29 are divided
It is not connected with the DP receivers and cloning module 22, transmitter module 23.
As shown in Figures 1 to 10, the DP signal input circuits 1, the first DP signal output apparatus 3, the 2nd DP signals are defeated
Go out circuit 4 and be respectively connected with DP terminals, the surface of the DP terminals is provided with Gold plated Layer, and the DP terminals are type and adopted
With surface gold-plating technique, the thickness of the Gold plated Layer is more than 10 μ.
As shown in Figures 1 to 10, " AUX+ " pin of the DP signal input circuits and " AUX- " pin are connected with the same direction
Buffer.
Inputted referring to Fig. 2,3, DP signals via DP terminals CN1, D0+, D0-, D1+, D1-, D2+, D2-, D3+ and D3- are
DP audios and four groups of unidirectional main channels of video signal data transmission, it is via capacitance C3 ~ C10 and master chip
Splitter4320 AC coupleds, audio and video data are transmitted in the form of both-end differential signal.AX+ and AX- is one group auxiliary
Help passage, it is mainly used in link management and equipment control via C1 and C2 and master chip AC coupled, such as enter line link by
DPCD information in instruction and exchange ROM Space.The AX+ and AX- of DP signal input circuits 1 are additionally operable to detect whether distributor connects
There are DP transmission lines, when being connected with transmission line, AX+ is driven high, and AX- is pulled low, and buffer U23 and U24 in the same direction is dry for omitting
Disturb, buffer exports high level when current potential is higher than+2.3V, exports low level less than+0.9V buffers, median is omitted.DP believes
The HPD output signals of number input circuit transmit OIR mark and be sent to the interruptions of Source end equipments mainly as DP please
Seek signal.D16, D17 and D18 are used to prevent AX-, AX+ and HPD issuable moment big voltage damage when transmitting OIR
Equipment.The DP signal input parts ESD protections protect four groups in the DP signal input circuits 1 using RClamp0524P
Input data differential pair, 1 group of accessory channel differential pair and HPD, it can bear ± 8KV transient voltages, ensure that enough safety
Allowance.
Referring to Fig. 4, the signal distribution circuit 2 is built from Splitter4320 as leitungskern, whole circuit
Carried out around master chip.In figure, Y2 is 27MHz crystal oscillators, and it provides initial clock signal by N7 and N8 pins for master chip.
J1, K2, H3, J3, F2, H4 pin are the startup item configuration pin of master chip, and main completion external crystal-controlled oscillation is enabled and OCM is starting
When using external ROM configuration, H4, J3 drawn high by 4.7K resistance R68, R77 by 3.3V power supplys, and F2, H3 and K2 pass through resistance
R69, R70 and R76 are pulled down to ground.U27 is outside Flash ROM memories PM25LD020, and it mainly stores each mould of master chip
Firmware program of block etc., master chip perform the code in U27 in electrification reset by the SPI interface in its OCM.U17 and
U21 is that master chip UART programming ports 5V turns 3.3V level translators, and its conversion speed is up to 210Mbps, burning data signal
It is converted into after 3.3V logic high forms by the burned master chip of J2, H4 pin, then is passed through by 5V logic high forms
Chip internal SPI interface is saved into U27（Outside Flash ROM memories PM25LD020）In, D23 and D24 are used for preventing UART
Instantaneous pressure caused by interface break-make damages level translator.Via the DP signal input circuits 1 input DP audios and
Vision signal is carried out data recovery, HDCP decryption, video raster and the conversion of audio sample form, number by Splitter4320 successively
The first DP signal output apparatus 3 and the 2nd DP signal output apparatus 4 are transferred to after being encrypted according to clone and HDCP then
Export and used to Sink ends DP equipment.
Referring to Fig. 5 to Fig. 8, Fig. 5 to Fig. 8 is respectively that the first DP signal output apparatus 3 and the 2nd DP signals are defeated
Go out the schematic diagram of circuit 4, two circuit theories are the same.By taking DP signal output apparatus 1 as an example, in figure, CN4 D0+, D0-, D1+,
D1-, D2+, D2-, D3+, D3-, AX+ and AX- are by 0.1 μ F electric capacity and Sink ends DP equipment AC coupleds, and U12 is via DP ends
Son PWR pins for downstream DP equipment provide+5V power D7, D12, D13 and D19 be used for prevent transmission OIR when there may be
Instant high-voltage damage master chip.The first DP signal output apparatus 3 and the 2nd DP signal output apparatus 4 are equally equal
ESD protection is carried out using RClamp0524P.
Referring to Fig. 9, Fig. 9 is a kind of power module schematic diagram of DP signal distributors of the present invention.Electricity is respectively adopted in the present invention
Source chip " 2679S "（U31）、“1S10P”（U28）Turn+5V and+5V turns of+1.2V power conversion to carry out+24V.Additionally, it is provided
Selectable+5V turns+3.3V power supplys, and it is respectively DC/DC converters " 1S10P "（U29）With LDO converters " 1117 "
（U30）.
Referring to Figure 10, Figure 10 is a kind of master chip Splitter4320 of DP signal distributors functional block diagram of the present invention.
Including front-end module 21, DP receivers and cloning module 22（DisplayPort1.2 receiver ＆ cloning modules）, OCM modules 29,
First DP transmitters 24 (the first DisplayPort1.2 transmitters), (the 2nd DisplayPort1.2 is sent out the 2nd DP transmitters 25
Emitter), the first HDCP modules 26, the 2nd HDCP modules 27 and the 3rd HDCP modules 28.The output end of the front-end module 21 with
The input connection of the DisplayPort1.2 receivers ＆ cloning modules, the DisplayPort1.2 receivers ＆ clone mould
The output end of block connects with the input of the first DisplayPort1.2 transmitters and the 2nd DisplayPort1.2 transmitters
Connect, the output ends of the OCM modules 29 respectively with the DisplayPort1.2 receivers ＆ cloning modules and
DisplayPort1.2 transmitter modules（First DisplayPort1.2 transmitters and the 2nd DisplayPort1.2 transmitters）
Input connection, the first HDCP modules 26, the 2nd HDCP modules 27 and the 3rd HDCP modules 28 respectively with the front end
Module 21, the first DisplayPort1.2 transmitters and the connection of the 2nd DisplayPort1.2 transmitters.As shown in Figure 10, DP is defeated
Enter signal after described DP signal input circuits 1 enter the front-end module 21 in, described front-end module 21 be used for pair
The video and audio signal of input carries out data recovery, and it carries out the data conversion of 8 to 10 according to the form of input signal.
The first HDCP modules 26 are used to the DP signals for inputting the front-end module 21 be decrypted, the DisplayPort1.2
The front end data bag received is converted into video raster data flow and audio sample and for cloning by receiver ＆ cloning modules, and
Two group data streams after clone and audio sample are encoded into two DP mono signal packets and are sent to described first
DisplayPort1.2 transmitters and the 2nd DisplayPort1.2 transmitters are used to serialize and transmit, the 2nd HDCP moulds
The HDCP modules 28 of block 27 and the 3rd respectively send out the first DisplayPort1.2 transmitters and the 2nd DisplayPort1.2
The data of emitter transmission exported before encryption, the signal after encryption passes through the first DP signal output apparatus 3 and second
DP signal output apparatus 4 is transferred to downstream DP equipment.OCM modules 29 are used for the initialization of each module and are described
DisplayPort1.2 receiver ＆ cloning modules and two transmitters provide firmware driver, in addition, the OCM modules 29
It is also used for performing the vertical application code for being related to chip configuration.
When the input and output side of the DP signal distributors is connected to DP signal sources and DP upstream devices respectively, described
One DisplayPort1.2 transmitters first pass through read downstream DP upstream devices EDID information and enter line link undergo training it is complete at first
Shaken hands into DP upstream devices, then will generation DPCD information replicate after be sent to the 2nd DisplayPort1.2 hair
Emitter is so that the DPCD information of two transmitters is consistent, so that the DisplayPort1.2 receivers ＆ cloning modules are able to
The characteristic information needed for DP output signals clone is obtained, identical DPCD finally is sent into the front-end module 21 is used to complete
Input is shaken hands, when three end shake hands all after the completion of, DP signals just start normal transmission.
A kind of DP system for delivering, it is characterised in that comprise the following steps：
S1, signal input, by DP input signals via the input signal distributor circuit 2 of DP signal input circuits 1；
S2, signal distribution, DP input signals are cloned into two identical DP output signals by signal distribution circuit 2；
S3, signal output, by two identical DP output signals respectively via the first DP signal output apparatus 3 and the 2nd DP signals
Output circuit 4 is exported to upstream device.
Step S2 includes：The video and audio signal of input is carried out by data recovery by front-end module 21, connect by DP
Receive device and cloning module 22 and packet is converted into video raster data flow and audio sample and for cloning, and by after clone
Two group data streams and audio sample are encoded into two DP mono signal packets and are sent respectively to the first DP transmitters 24, second
DP transmitters 25；Step S3 includes：DP mono signals packet is used to go here and there by the first DP transmitters 24, the 2nd DP transmitters 25
Rowization and output.
The DP signals for inputting the front-end module 21 are decrypted by the first HDCP modules 26, pass through the 2nd HDCP moulds
Block 27, the 3rd HDCP modules 28 are respectively exported the data that the first DP transmitters 24, the 2nd DP transmitters 25 transmit
Preceding encryption, DP receivers and cloning module 22, the first DP transmitters 24, the 2nd DP transmitters 25 are entered by OCM modules 29
Row initialization, it is that DP receivers and cloning module 22, the first DP transmitters 24, the 2nd DP transmitters 25 carry by OCM modules 29
For firmware driver.
When the input and output side of the DP signal distributors is connected to DP signal sources and DP upstream devices respectively, described
One DP transmitters 24 first pass through the EDID for reading downstream DP upstream devices and enter line link and undergo training to be initially completed and DP upstream devices
Shake hands, then will generation DPCD information replicate after be sent to the 2nd DP transmitters 25 so that the first DP transmitters 24,
The DPCD information of 2nd DP transmitters 25 is consistent, so that the DP receivers and cloning module 22 are able to obtain DP output signals
Characteristic information needed for clone, identical DPCD is finally sent to the front-end module 21 and is used to complete shaking hands for input.
DP signal distributors and DP system for delivering provided by the invention, DP signals are from the DP signal input circuits 1
Input, data recovery, HDCP decryption, video raster and the conversion of audio sample form, number are carried out via the signal distribution circuit 2
The first DP signal output apparatus 3 and the 2nd DP signal output apparatus 4 are transferred to after being encrypted according to clone and HDCP then
Export and used to Sink ends DP equipment.
DP signal distributors and DP system for delivering provided by the invention, can by the DP high-definition video signals of input and
Audio signal is converted into the DP signal outputs that two-way is consistent, synchronous, has the advantages of low cost, stable performance, high bandwidth.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
- A kind of 1. DP signal distributors, it is characterised in that：Including DP signal input circuits, signal distribution circuit, the first DP signals Output circuit, the 2nd DP signal output apparatus and power module, wherein, the output end of described DP signal input circuits with it is described Signal distribution circuit input connection, the output end of the signal distribution circuit respectively with the first DP signal outputs electricity The input of road and the 2nd DP signal output apparatus connect, the power module respectively with the DP signal input circuits, Signal distribution circuit, the first DP signal output apparatus and the connection of the 2nd DP signal output apparatus, DP input signals are via the DP Signal input circuit is cloned into two identical DP signals after entering the signal distribution circuit and believed via the first DP Number output circuit and the 2nd DP signal output apparatus are exported to upstream device.
- 2. DP signal distributors according to claim 1, it is characterised in that：The input termination DC24V of the power module Power supply, the input of the DP signal input circuits are connected with DP signal sources, the first DP signal output apparatus and the 2nd DP The output end of signal output apparatus is connected with DP upstream devices.
- 3. DP signal distributors according to claim 1, it is characterised in that：The signal distribution circuit is included to input Video and audio signal carries out the front-end module, DP receivers and cloning module, transmitter module of data recovery, the transmitter Module includes the first DP transmitters and the 2nd DP transmitters, the output end of described DP signal input circuits and described front end mould The input connection of block, the output end of the front-end module are connected with the input of institute's DP receivers and cloning module, the DP The output end of receiver and cloning module is connected with the first DP transmitters, the 2nd DP transmitters respectively, the DP receivers And the packet of the front-end module received is converted into video raster data flow and audio sample and for cloning by cloning module, And two group data streams after clone and audio sample are encoded into two DP mono signal packets and are sent respectively to the first DP Transmitter, the 2nd DP transmitters are used to serialize and transmit.
- 4. DP signal distributors according to claim 3, it is characterised in that：The signal distribution circuit also includes first HDCP modules, the 2nd HDCP modules and the 3rd HDCP modules, wherein, the first HDCP modules are connected with the front-end module, The 2nd HDCP modules are connected with the first DP transmitters, and the 3rd HDCP modules connect with the 2nd DP transmitters Connect, the first HDCP modules are used to the DP signals for inputting the front-end module be decrypted, the 2nd HDCP modules, the Three HDCP modules respectively by the first DP transmitters, the 2nd DP transmitters transmit data exported before encryption.
- 5. DP signal distributors according to claim 3, it is characterised in that：The signal distribution circuit also includes OCM moulds Block, wherein, the OCM modules are connected with the DP receivers and cloning module, transmitter module respectively.
- 6. DP signal distributors according to claim 1, it is characterised in that：The DP signal input circuits, the first DP letters Number output circuit, the 2nd DP signal output apparatus are respectively connected with DP terminals, and the surface of the DP terminals is provided with Gold plated Layer, the plating The thickness of layer gold is more than 10 μ, and " AUX+ " pin and " AUX- " pin of the DP signal input circuits are connected with buffering in the same direction Device.
- 7. a kind of DP system for delivering, it is characterised in that comprise the following steps：S1, signal input, by DP input signals via DP signal input circuit input signal distributor circuits；S2, signal distribution, DP input signals are cloned into two identical DP output signals by signal distribution circuit；S3, signal output, by two identical DP output signals respectively via the first DP signal output apparatus and the 2nd DP signals Output circuit is exported to upstream device.
- 8. DP system for delivering according to claim 7, it is characterised in that：Step S2 includes：Will by front-end module The video and audio signal of input carries out data recovery, and packet is converted into video raster by DP receivers and cloning module Data flow and audio sample simultaneously are used to clone, and two group data streams after clone and audio sample are encoded into two DP mono signals Packet is sent respectively to the first DP transmitters, the 2nd DP transmitters；Step S3 includes：The first DP transmitters, DP mono signals packet is used to serialize and export by two DP transmitters.
- 9. DP system for delivering according to claim 8, it is characterised in that：By the first HDCP modules to described in input The DP signals of front-end module are decrypted, by the 2nd HDCP modules, the 3rd HDCP modules respectively by the first DP transmitters, 2nd DP transmitters transmission data exported before encryption, by OCM modules to DP receivers and cloning module, the first DP Transmitter, the 2nd DP transmitters are initialized, and are DP receivers and cloning module, the first DP transmitters, the by OCM modules Two DP transmitters provide firmware driver.
- 10. DP system for delivering according to claim 8, it is characterised in that：When the input of the DP signal distributors When being connected to DP signal sources and DP upstream devices respectively with output end, the first DP transmitters first pass through reading downstream DP downstreams and set Standby EDID and enter line link and undergo training to be initially completed and shaken hands with DP upstream devices, then will generation DPCD information replicate after send out The 2nd DP transmitters are given so that the first DP transmitters, the DPCD information of the 2nd DP transmitters are consistent, so that the DP Receiver and cloning module are able to obtain the characteristic information needed for DP output signals clone, and identical DPCD finally is sent into institute Front-end module is stated to be used to complete shaking hands for input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710749884.4A CN107396003B (en) | 2017-08-28 | 2017-08-28 | DP signal distributor and DP signal distribution method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710749884.4A CN107396003B (en) | 2017-08-28 | 2017-08-28 | DP signal distributor and DP signal distribution method |
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