CN106851233A - A kind of HD video optical transmitter and receiver EDID information auto updating methods and device - Google Patents
A kind of HD video optical transmitter and receiver EDID information auto updating methods and device Download PDFInfo
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- CN106851233A CN106851233A CN201710041452.8A CN201710041452A CN106851233A CN 106851233 A CN106851233 A CN 106851233A CN 201710041452 A CN201710041452 A CN 201710041452A CN 106851233 A CN106851233 A CN 106851233A
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- receiver
- optical transmitter
- edid
- video
- optical
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
-
- 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
Abstract
The present invention relates to a kind of HD video optical transmitter and receiver EDID information auto updating methods and device, belong to optical transport technology field.Present invention transmitting optical transmitter and receiver is by judging whether optical fiber link is set up, whether hot plug pin inserts read and verify realizing receiving the EDID information in optical transmitter and receiver data, and framing issues transmitting optical transmitter and receiver by FPGA framing and packings into EDID packets, transmitting optical transmitter and receiver judges optical link state, drags down the source reading of hot plug pin suppression HD video, EDID packets are received by high speed transceiver module to be extracted, verified and judged, if consistent with pre-stored content, no longer it is updated, external memory storage information is otherwise updated, realizes automatically updating.The present invention can be in the case where connected mode not be changed by frock and not, point-to-point automatic judgement is realized, automatically updated, loaded automatically, the full-automatic renewal of EDID information is completed, HD video optical transmitter and receiver application facility is improve, with larger actual application value.
Description
Technical field
The present invention relates to a kind of HD video optical transmitter and receiver EDID information auto updating methods and device, belong to optical transport technology
Field.
Background technology
Current HD video (HDMI, DVI) class fax transfer device, signal transmitted data amount is big and speed is high, with distance
Increase, the decay of signal high fdrequency component is huge, therefore limited transmission distance.The long distance of HDMI/DVI can be solved by Optical Fiber Transmission
From the limitation of signal transmission, but wherein EDID information processings are that it is crucial, and the acquisition of EDID can be influenceed over long distances.
(Extended Display Identification Data (extension display unlabeled data) are a kind of VESA to EDID
Standard data format, is the optimization display format data standard set for PC displays, and it stores special in the display
In eeprom memory, data structure includes 256Byte.PC main frames and display pass through DDC channel access memories, to determine
The function and equipment of display device.EDID information physicals medium is communicated using DDC passages, and DDC channel communications agreement is accorded with
Close I2C agreements.
Usual a set of high-resolution video transfer system is made up of emitter (A), receiver (B) and Optical Fiber Transmission medium (C), such as
Shown in Fig. 1.In order to the long term distance for solving the problems, such as EDID information cannot be transmitted, general use emitter fixed configurations mode exists
In emitter (A), it is necessary to be interconnected renewal with emitter (A) by frock or connection display when if desired updating.So
And above-mentioned EDID information update operations are complicated, equipment maintainability is poor.
The content of the invention
The purpose of the present invention is：There is provided a kind of easy to operate, the HD video optical transmitter and receiver EDID of automatic identification can be realized
Information auto updating method.
In addition, also providing a kind of HD video optical transmitter and receiver EDID information automatic renewing devices.
Technical scheme：A kind of HD video optical transmitter and receiver EDID information automatic renewing devices, it includes sending light
Terminal and reception optical transmitter and receiver, wherein, the transmission optical transmitter and receiver includes EDID storage circuits, hot plug change-over circuit, video decoding
Module, FPGA processing modules and optical module；Wherein, the EDID storage circuits, hot plug change-over circuit, Video decoding module point
It is not connected with FPGA processing modules, and the output of FPGA processing modules is connected on optical module；The reception optical transmitter and receiver also includes
EDID storage circuits, hot plug change-over circuit, Video decoding module, FPGA processing modules, optical module, and receive optical transmitter and receiver
EDID storage circuits, hot plug change-over circuit, Video decoding module, optical module FPGA processing modules internal with it are connected,
Also include receiving the DPLL modules that optical transmitter and receiver FPGA processing modules are connected with distal end simultaneously, wherein, the optical transmitter and receiver that receives is with hair
The respective optical module of optical transmitter and receiver is sent to be connected by optical fiber.
When distal end receives electricity on optical transmitter and receiver, judge whether optical link sets up the state with hot plug pin to realize
EDID information is read and the information to reading is verified, and coding framing and high speed are returned.
Send optical transmitter and receiver judge optical link whether set up, receive high-speed serial data, decoding extract, carry out comparing and
Verification, updates new edition EDID information, realizes that EDID information is read in HD video source by changing hot plug pin pin status.
A kind of update method based on described HD video optical transmitter and receiver EDID information automatics, its transmitting optical transmitter and receiver pair
The high-definition video signal of input decoded, process after data is activation to optical transmitter and receiver is received, receive the data that optical transmitter and receiver is received
Changed and exported to external display device again after being processed, wherein, optical receiving end is by judging whether optical fiber link is set up, heat
Whether plug pin inserts to realize that the EDID information in many received data reads and verification, and framing is beaten by FPGA framings
It is bundled into EDID packets and issues transmitting optical transmitter and receiver, transmitting optical transmitter and receiver judges optical link state, drags down hot plug pin suppression high definition
Video source read, EDID packets are received by high speed transceiver module and are extracted, verified and is judged, if with it is pre-stored in
Hold unanimously, be no longer updated, otherwise update external memory storage information, realize automatically updating.
After transmitting optical transmitter and receiver updates verification, after realizing that renewal is read in HD video source by drawing high hot plug pin
EDID information, so as to realize that whole process automatically updates.
Realize that EDID information is automatically updated while realizing that resolution ratio is at least regarding for the HD video of 1600 × 1200@60Hz
Keep pouring in defeated.
Beneficial effects of the present invention：
The present invention realizes the automatic identification of EDID information in HD video optical transmitter and receiver, automatically updates, loads automatically, can
It is full-automatic to update display extension information (EDID), and realize it is point-to-point automatically update, while can be by video switching matrix reality
The identification of switching and EDID information between incumbent meaning screen.In addition, the present invention is by the use of FPGA programming devices as core processing
Unit, realizes that HD video (DVI, HDMI) resolution ratio meets the downward automatic compatible, EDID of 1600 × 1200 and 60Hz automatically more
New HD video transmitting device, with larger actual application value.
Brief description of the drawings
Fig. 1 is HD video optical transmitter and receiver connection diagram of the present invention；
Fig. 2 is the HD video long-distance transmissions device systems block diagram automatically updated with EDID information；
Fig. 3 receiver EDID message processing flows；
Fig. 4 emitter EDID message processing flows；
Fig. 5 EDID frame structures,
Wherein, 1-EDID storage circuits, 2- hot plugs change-over circuit, 3- Video decoding modules, 4-FPGA processing modules, 5-
Optical module, 6-DPLL modules, 7-EDID change-over circuits, 8- video encoding modules, 9- optical fiber, 10 HD video sources, 11- show and set
Standby, 12- sends optical transmitter and receiver, 13- and receives optical transmitter and receiver.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 and Fig. 2 is referred to, HD video optical transmitter and receiver EDID information automatic renewing device of the present invention includes sending optical transmitter and receiver
With reception optical transmitter and receiver.It is described transmission optical transmitter and receiver include EDID storage circuits 1, hot plug change-over circuit 2, Video decoding module 3,
FPGA processing modules 4 and optical module 5.Wherein, the EDID storage circuits 1, hot plug change-over circuit 2, Video decoding module point
Other 3 are connected with FPGA processing modules 4, and the output of FPGA processing modules 4 is connected on optical module 5.The reception optical transmitter and receiver is also wrapped
EDID change-over circuits 7, hot plug change-over circuit 2, Video decoding module 3, FPGA processing modules 4, optical module 5 are included, and receives light
The FPGA treatment internal with it of EDID change-over circuits 7, hot plug change-over circuit 2, Video decoding module 3, the optical module 5 of terminal
Module 4 is connected, while also including receiving (the digital phase-locked loop electricity of DPLL modules 6 that optical transmitter and receiver FPGA processing modules 4 are connected with distal end
Road).The optical transmitter and receiver that receives is connected with the respective optical module of transmission optical transmitter and receiver by optical fiber.
Wherein, the EDID storage circuits 1 are used as EDID information storage circuits, with DDC channel interface defencive functions.
The EDID change-over circuits 7 are used to realize the protection of DDC channel interfaces and level conversion.
The hot plug change-over circuit 2 realizes level conversion by the plug of pin, with the protection of hot plug pin interface
With level conversion function.Wherein, emitter is that the logic level sent by fpga core processing unit controls hot plug pin
Low state high, and notify that main control computer obtains EDID information by hot plug pin；Receiver is sentenced by FPGA processing modules
The state of the hot plug pin of the output of display device is determined, so as to determine whether that display device EDID letters in itself can be read
Breath.
The video decoding and the main encoding-decoding process for realizing HD video of coding module 3, from the multi-path serial of standard
Data stream is into parallel data and parallel video data to multipath high-speed serial data stream.
The DPLL digital PLL circuits mainly realize that pixel clock is generated, and realize resolution ratio adaptation function.
The FPGA processing modules are the core cell for sending optical transmitter and receiver and receiving optical transmitter and receiver.Receiver FPGA processing modules
Comprising Link State detection module, I2C processing modules, EDID memory modules, EDID framing modules and EDID sending modules, it is responsible for
EDID information reads, verifies and coding framing.Wherein Link State detection module is used to detect that whether there is optical signal in optical module defeated
Enter, if detected light being input into, control signal is sent to I2C processing modules, control I2C modules carry out the reading of EDID information
Take；I2C processing modules are used to realize standard I2C sequential that can wherein read out EDID storage informations from reality, the module to be received
Start to read EDID information after to the control signal from Link State detection module；EDID memory modules are used to deposit I2C
The EDID information that module reads；EDID framing modules carry out the EDID information wherein read from display according to certain frame format
Packing is processed, and frame format is as shown in figure 5, including frame head identifier, EDID information, postamble identifier, check information.EDID information
Frame head identifier is first sent before transmitting, and then the starting position for marking EDID information starts to continuously transmit EDID letters
Breath, sends postamble identifier to mark the end position of EDID information after EDID information is sent completely, and finally frame head is arrived
All data of postamble are verified, for detecting that opposite end receives the correctness of data.After frame is sealed, sent by EDID information
Optical module is sent to after the encoded parallel-serial conversion of module.
Emitter FPGA processing modules include EDID information receiving modules, EDID solutions frame module, EDID memory modules and I2C
Processing module, is responsible for the extraction of EDID information solutions frame, verification and the information updating of memory and EDID is read in control HD video source
Information.Wherein the serial signal from optical module is converted to parallel signal by EDID information receiving modules, synchronous by decoding
Go out EDID information frame structures Deng operation recovery；EDID solve frame module according to the frame structure in Fig. 5 by EDID information analysis out, and
Verified to confirm the correctness of EDID information transfers.EDID information storage modules are given by EDID information transmissions if correct,
EDID information is abandoned if mistake.Then I2C modules then will be stored in digital independent in EDID information storage modules out
EDID information is sent in external memory storage by I2C standard time sequences.
FPGA processing modules are responsible for the framing coding and high speed receipts of video signal collective, synchronization process and video data simultaneously
Hair, is that high speed uplink and descending optical signal carry out long distance using optical module high-speed channel T (transmitting) and R (reception) Channel-shifted
From transmission, it is achieved thereby that transmission of video and EDID information are automatically updated.
The transmitter-receiver device being made up of above circuit module can not only realize HD video (1600 × 1200@
60Hz resolution ratio is backward compatible) optical fiber long-distance transmissions, while automatically updating for remote EDID information can be realized.
HD video optical transmitter and receiver EDID information automatic renewing devices of the present invention avoid using special instrument or tooling device
EDID renewals are carried out, while avoiding unnecessary artificial operation, the purpose that system EDID information is automatically updated is realized.
The HD video opto-electronic conversion dress that HD video optical transmitter and receiver EDID information automatic renewing devices of the present invention are mainly applied
Put, it is possible to achieve HD video (DVI, HDMI) long-distance transmissions and the verification of EDID information automatic identification and remote auto are more
Newly, can be with applicable industry field of video monitoring.
Based on above-mentioned HD video optical transmitter and receiver EDID information automatic renewing devices, in use, in order to it is convenient,
The EDID information of the display device of receiving terminal is quick and precisely updated, the present invention passes through EDID data obtaining modules, memory module, letter
Breath determination module, light delivery module etc. cleverly devise a kind of method that HD video optical fiber EDID information is automatically updated.
When HD video optical transmitter and receiver EDID information auto updating methods of the present invention are implemented, Fig. 3, the optical mode of receiver are referred to
The optical signal that block circuit will be received is converted to high-speed electrical signals, then will be processed by FPGA processing modules, after treatment
Data by video encoding module export.Meanwhile, in receiving terminal by judging whether optical fiber link is set up, hot plug pin is
No to insert to realize that EDID information reads, according to VESA standard implementation data checks, and framing is by FPGA framing and packings into height
Fast Serial E DID packets, transmitting optical transmitter and receiver is given by optical module optical transport.
Fig. 4 is referred to, the Video decoding module for launching optical transmitter and receiver is decoded to the high-definition video signal being input into, and will be decoded
Data feeding FPGA processing modules afterwards, FPGA switchs to high-speed serial data feeding optical mode after processing decoded data
Block circuit, optical module circuit conversion is sent to receiving terminal for optical signal by optical fiber.
Meanwhile, EDID packets are received by optical module in transmitting terminal, FPGA processing modules will by unpacking, verification and
Compare, in the data Cun Chudao external memory storages updated to needs, and realize that high definition is regarded by changing the state of hot plug pin
Read EDID information in frequency source.Wherein the serial signal from optical module is converted to parallel signal by EDID information receiving modules,
Go out EDID information frame structures by decoding the operation recovery such as synchronous；EDID solution frame modules believe EDID according to the frame structure in Fig. 5
Breath is parsed, and is verified and confirm the correctness of EDID information transfers.By EDID information transmissions to EDID if correct
Information storage module, abandons EDID information if mistake.I2C modules then will be stored in the data in EDID information storage modules
Read out and then EDID information is sent in external memory storage by I2C standard time sequences.
Wherein, the judgment basis of Receiver And Transmitter：
1. the Link State pin status for being exported by photoelectric conversion module judge whether optical fiber link state connects.
2. according to VESA E-EDID Standard standards, video signal source is realized by the state for changing hot plug pin
Read the control of EDID information.
3. according to VESA standards, judge when read according to the hot plug pin level state of the interface of display device
EDID information.
4. by pre-stored EDID information inside emitter, determine a need for updating.
5. according to VESA E-EDID Standard standards, EDID data checks are carried out, writes outside after verification after success
Memory, confirms that EDID information is correct.
The emitter of HD video optical transmitter and receiver EDID information automatic renewing devices of the present invention realizes video data in sum
Synchronization process and video data framing, at the same process receiver passback EDID serial data frames, and verify storage deposited to outside
With judgement optical module optical fiber link state LOS (losing light instruction) signal in reservoir；Receiver is responsible for video data solution frame book data
It is synchronous, and realize resolution ratio automatic identification, judge the optical fiber link state LOS signals of optical module and judge to read display device
EDID information is simultaneously verified.Can thus avoid carrying out EDID renewals using special instrument or tooling device, while keeping away
Exempt from unnecessary artificial operation, reduce the Operating Complexity for updating EDID information, improve equipment maintainability, can not borrow
In the case that assistant engineer fills and do not change connected mode, point-to-point automatic judgement is realized, automatically updated, loaded automatically, complete EDID
The full-automatic renewal of information, therefore with larger actual application value.
Claims (6)
1. a kind of HD video optical transmitter and receiver EDID information automatic renewing devices, it is characterised in that including sending optical transmitter and receiver and reception
Optical transmitter and receiver, wherein, the transmission optical transmitter and receiver is included at EDID storage circuits, hot plug change-over circuit, Video decoding module, FPGA
Reason module and optical module；Wherein, the EDID storage circuits, hot plug change-over circuit, Video decoding module respectively with FPGA at
Reason module connection, and the output of FPGA processing modules is connected on optical module；It is described reception optical transmitter and receiver also include EDID storage circuits,
Hot plug change-over circuit, Video decoding module, FPGA processing modules, optical module, and receive EDID storage circuits, the heat of optical transmitter and receiver
Plug change-over circuit, Video decoding module, optical module FPGA processing modules internal with it are connected, while also including and distal end
The DPLL modules of optical transmitter and receiver FPGA processing modules connection are received, wherein, the respective light for receiving optical transmitter and receiver and sending optical transmitter and receiver
Module is connected by optical fiber.
2. HD video optical transmitter and receiver EDID information automatic renewing devices according to claim 1, it is characterised in that work as distal end
When receiving electricity on optical transmitter and receiver, judge whether optical link sets up the state with hot plug pin to realize that EDID information reads and right
The information of reading is verified, coding framing and at a high speed passback.
3. HD video optical transmitter and receiver EDID information automatic renewing devices according to claim 1, it is characterised in that send light
Terminal judges whether optical link is set up, receives high-speed serial data, decoding is extracted, carry out comparing and verification, updates new edition
EDID information, realizes that EDID information is read in HD video source by changing hot plug pin pin status.
4. a kind of update method of the HD video optical transmitter and receiver EDID information automatics based on described in claim 1, its feature
It is that the data is activation after transmitting optical transmitter and receiver is decoded, processed to the high-definition video signal being input into gives reception optical transmitter and receiver, receives
The data that optical transmitter and receiver is received are changed and exported to external display device again after being processed, wherein, optical receiving end is by judging light
Whether fine link is set up, whether hot plug pin inserts to realize that the EDID information in many received data reads and verification, and
Framing issues transmitting optical transmitter and receiver by FPGA framing and packings into EDID packets, and transmitting optical transmitter and receiver judges optical link state, drags down
Hot plug pin suppresses HD video source and reads, by high speed transceiver module receive EDID packets extracted, verify and
Judge, if consistent with pre-stored content, be no longer updated, otherwise update external memory storage information, realize automatically updating.
5. HD video optical transmitter and receiver EDID information automated process according to claim 4, it is characterised in that transmitting optical transmitter and receiver
After updating verification, realize that the EDID information after updating is read in HD video source by drawing high hot plug pin, it is whole so as to realize
Individual process automatically updates.
6. HD video optical transmitter and receiver EDID information automated process according to claim 4, it is characterised in that realize that EDID believes
Breath is automatically updated while realizing that resolution ratio is at least the transmission of video of the HD video of 1600 × 1200@60Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041452.8A CN106851233B (en) | 2017-01-20 | 2017-01-20 | Automatic updating method and device for EDID information of high-definition video optical transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041452.8A CN106851233B (en) | 2017-01-20 | 2017-01-20 | Automatic updating method and device for EDID information of high-definition video optical transmitter and receiver |
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| Publication Number | Publication Date |
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| CN106851233A true CN106851233A (en) | 2017-06-13 |
| CN106851233B CN106851233B (en) | 2020-04-07 |
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| CN201710041452.8A Active CN106851233B (en) | 2017-01-20 | 2017-01-20 | Automatic updating method and device for EDID information of high-definition video optical transmitter and receiver |
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| CN109309820A (en) * | 2018-11-05 | 2019-02-05 | 长芯盛（武汉）科技有限公司 | A kind of HDMI active optical cable connecting line with monitoring and configuration feature |
| CN110853588A (en) * | 2019-10-23 | 2020-02-28 | 西安万像电子科技有限公司 | Data processing method and device |
| CN113411531A (en) * | 2021-05-19 | 2021-09-17 | 深圳爱特天翔科技有限公司 | EDID and HDCP management method and video transmission device |
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