CN110855910A - Multi-screen splicing system based on FC-AV protocol - Google Patents
Multi-screen splicing system based on FC-AV protocol Download PDFInfo
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- CN110855910A CN110855910A CN201911129882.0A CN201911129882A CN110855910A CN 110855910 A CN110855910 A CN 110855910A CN 201911129882 A CN201911129882 A CN 201911129882A CN 110855910 A CN110855910 A CN 110855910A
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- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 230000010354 integration Effects 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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Abstract
The invention relates to a multi-screen splicing system based on an FC-AV protocol, which comprises: the system comprises an upper computer, a video integration and distribution controller, an optical fiber and a receiving controller; the upper computer is a video source scheduling control end of the whole system, a video display command is issued by user operation, the video integration and distribution controller is responsible for decoding various types of video data into RGB pixel data, the RGB pixel data are processed and packaged into a plurality of FC-AV data frames according to instructions of the upper computer, the FC-AV data frames are transmitted to a receiving end in a long distance through optical fibers, the receiving end recognizes frame head numbers to receive corresponding FC-AV data frames, and the data are converted into video signals to be displayed. The FC-AV protocol-based multi-screen splicing system is based on the server video coding of the IP protocol, and the code stream coding rate is 4Mbps at most; the encoding rate of the FPGA based on the FC-AV protocol is up to dozens of million to over a hundred million based on a pixel clock. Video compression is not carried out: the video is not required to be compressed, and the lossless transmission of the video with high bandwidth, high reliability, low delay and long distance can be realized.
Description
Technical Field
The invention designs a remote transmission technology of multi-channel multi-class videos, and particularly relates to a multi-screen splicing system based on an FC-AV protocol.
Background
The large-screen splicing display technology of liquid crystal is a new technology, consists of a plurality of liquid crystal display screens, can be randomly arranged to form a required display size, and has the characteristics of high brightness, high contrast, high color saturation, high color uniformity, long service life, long mean time to failure, low cost and the like. The method is widely applied to large-screen display systems for security monitoring, information publishing, advertisement displaying and the like. At present, a certain blank exists on a multi-screen splicing system based on an FC-AV protocol.
Disclosure of Invention
The invention aims to provide a multi-screen splicing system based on an FC-AV protocol, which is used for solving the problems in the prior art.
The invention relates to a multi-screen splicing system based on an FC-AV protocol, which comprises: the system comprises an upper computer, a video integration and distribution controller, an optical fiber and a receiving controller; the upper computer is a video source scheduling control end of the whole system, a video display command is issued by user operation, the video integration and distribution controller is responsible for decoding various types of video data into RGB pixel data, the RGB pixel data are processed and packaged into a plurality of FC-AV data frames according to instructions of the upper computer, the FC-AV data frames are transmitted to a receiving end in a long distance through optical fibers, the receiving end recognizes frame head numbers to receive corresponding FC-AV data frames, and the data are converted into video signals to be displayed.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system of the present invention, the video integration and distribution controller includes: the device comprises a video input module, a storage module, a data processing module, an asynchronous FIFO, a frame packaging module and an SFP photoelectric module; the video input module transcodes the input video signal into a digital video signal of VESA standard through the video input module and sends the digital video signal into the data processing module so as to judge the video resolution and process data; the storage module temporarily stores the input video; the data processing module is a main processor, and is used for splitting, amplifying and reducing the multi-channel video images according to the configuration information of the upper computer, and caching the multi-channel video images into blocks into the storage module according to the position parameters of the configuration information; writing the split video data into a plurality of asynchronous FIFOs; and the frame encapsulation module encapsulates the processed video signals into frames according to an FC-AV protocol, performs parallel-serial conversion on the data frames through the SFP photoelectric module, converts the data frames into optical signals and sends the optical signals out through optical fibers.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system, the video input module is a video decoding chip.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system, the receiving controllers are arranged on the multi-screen display terminals, and each display is connected with one receiving controller.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system, the receiving controller comprises an SFP photoelectric module, a frame analysis module, a storage module and a video output module; after receiving the optical fiber video, the SFP photoelectric module converts the optical fiber video into an electric signal, the electric signal is transmitted to a frame analysis module, frame data analysis is carried out through serial-parallel conversion, a frame header is read to obtain video resolution, and a line-field synchronous clock is produced; and caching the read video data into a storage module.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system of the present invention, the video output module is a video display chip, and displays a video format required by the cached video generation display.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system, each receiving end is burned with an ID number, a plurality of display terminals only need to be randomly arranged, after an FC link is successfully established, an upper computer sends a position judgment instruction to handshake with the receiving ends of the display terminals, the positions of the display screens are confirmed one by one, and then the reset numbers are re-programmed on the upper computer.
According to an embodiment of the FC-AV protocol-based multi-screen splicing system of the present invention, wherein the asynchronous FIFO is further applied to clock domain isolation.
The FC-AV protocol-based multi-screen splicing system has the following advantages: the transmission rate is high, namely the server video coding based on the IP protocol has the highest code stream coding rate of 4 Mbps; the encoding rate of the FPGA based on the FC-AV protocol is up to dozens of million to over a hundred million based on a pixel clock. Video compression is not carried out: the video is not required to be compressed, and the lossless transmission of the video with high bandwidth, high reliability, low delay and long distance can be realized. The embedded equipment: only embedded equipment is arranged at the transmitting end and the receiving end, the energy consumption is low, the risk of system breakdown of control equipment is avoided, and the safe operation of 7x24 hours is realized. The optical fiber transmission has the advantages of wide frequency band, low loss, light weight, strong anti-interference capability, high fidelity and the like based on the optical fiber medium, and ensures the lossless, high-speed and long-distance transmission of video data. A thin client: the multi-screen display end can realize image splicing quickly, and people do not need to plug and pull connecting wires in the display end to confirm the connection relation between the display output ends of the computer, so that the time and the labor are saved.
Drawings
FIG. 1 is a block diagram of a FC-AV protocol-based multi-screen splicing system;
FIG. 2 is a block diagram of a video integration and distribution controller;
fig. 3 is a block diagram of a receiving controller.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Fig. 1 is a block diagram of a FC-AV protocol-based multi-screen splicing system, and as shown in fig. 1, the FC-AV protocol-based multi-screen splicing system includes: host computer, video integration distribution controller, optic fibre and receiving control ware. The upper computer is a video source scheduling control end of the whole system, and video display commands are issued by user operation. The video integration and distribution controller is responsible for decoding the multi-type video data into RGB pixel data, processing and packaging the RGB pixel data into a plurality of FC-AV data frames according to instructions of an upper computer, and transmitting the FC-AV data frames to a receiving end through an optical fiber in a long distance. And the receiving end identifies the frame head number to receive the corresponding FC-AV data frame and converts the data into a video signal for displaying.
Fig. 2 is a block diagram of a video integration and distribution controller, and as shown in fig. 2, the module mainly includes a video input module, a storage module, a data processing module, an asynchronous FIFO, a frame encapsulation module, and an SFP optoelectronic module.
(1) The video input module transcodes the input video signal into digital video signals (RGB pixel data and line-field synchronous signals) of VESA standard through the video input module, and sends the digital video signals into the data processing module to judge the video resolution and process the data; the video input module is a special video decoding chip;
(2) because frame asynchronization exists between different resolutions, the input video needs to be temporarily stored in a storage;
(3) the data processing module is a main processor, and is used for performing operations such as splitting, amplifying, reducing and the like on the multi-channel video images according to the configuration information of the upper computer, and caching the multi-channel video images into the storage module in blocks according to the position parameters of the configuration information;
(4) the split processed video data is written into a plurality of asynchronous FIFOs, and the asynchronous FIFOs are used for clock domain isolation besides caching data;
(5) and the frame encapsulation module encapsulates the processed video signals into frames according to an FC-AV protocol, performs parallel-serial conversion on the data frames through the SFP photoelectric module, converts the data frames into optical signals and sends the optical signals out through optical fibers.
Fig. 3 is a block diagram of a receiving controller, and as shown in fig. 3, the receiving controller is disposed in a multi-screen display terminal, and each display is connected to one receiving controller. The module mainly comprises an SFP photoelectric module, a frame analysis module, a storage module and a video output module. The specific implementation process is as follows:
the SFP photoelectric module receives the optical fiber video, converts the optical fiber video into an electric signal, sends the electric signal to the frame analysis module, performs frame data analysis through serial-parallel conversion, reads a frame header to obtain video resolution, and produces a line-field synchronous clock for the following two modules; and caching the read video data into a storage module.
The video output module is a video display chip and displays the cached video in a video format required by the video generation display.
In order to realize the fast and need not the connecting wire between artifical hot plug display device and the computer display output port in order to change the display screen position. Each receiving end is burned with an ID number of the receiving end. The plurality of display terminals only need to be arranged randomly, after the FC link is established successfully, the upper computer sends a position judgment instruction to handshake with the receiving ends of the display terminals, the positions of the display screens are confirmed one by one, and then the position numbers are re-programmed on the upper computer. The process only requires software operation on the upper computer by a user.
The system adopts a main processing mode of a sending end, and the receiving end only carries out decoding display processing in a thin client terminal mode. The invention provides a multi-screen splicing system based on an FC-AV protocol, which realizes large-screen splicing display of a single-path or multi-path high-definition video based on the FC-AV protocol.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A multi-screen splicing system based on FC-AV protocol is characterized by comprising: the system comprises an upper computer, a video integration and distribution controller, an optical fiber and a receiving controller; the upper computer is a video source scheduling control end of the whole system, a video display command is issued by user operation, the video integration and distribution controller is responsible for decoding various types of video data into RGB pixel data, the RGB pixel data are processed and packaged into a plurality of FC-AV data frames according to instructions of the upper computer, the FC-AV data frames are transmitted to a receiving end in a long distance through optical fibers, the receiving end recognizes frame head numbers to receive corresponding FC-AV data frames, and the data are converted into video signals to be displayed.
2. A FC-AV protocol-based multi-screen mosaic system according to claim 1, wherein the video integration distribution controller comprises: the device comprises a video input module, a storage module, a data processing module, an asynchronous FIFO, a frame packaging module and an SFP photoelectric module;
the video input module transcodes the input video signal into a digital video signal of VESA standard through the video input module and sends the digital video signal into the data processing module so as to judge the video resolution and process data; the storage module temporarily stores the input video; the data processing module is a main processor, and is used for splitting, amplifying and reducing the multi-channel video images according to the configuration information of the upper computer, and caching the multi-channel video images into blocks into the storage module according to the position parameters of the configuration information; writing the split video data into a plurality of asynchronous FIFOs; and the frame encapsulation module encapsulates the processed video signals into frames according to an FC-AV protocol, performs parallel-serial conversion on the data frames through the SFP photoelectric module, converts the data frames into optical signals and sends the optical signals out through optical fibers.
3. A FC-AV protocol-based multi-screen mosaic system according to claim 1, wherein the video input module is a video decoding chip.
4. A FC-AV protocol-based multi-screen splicing system according to claim 1, wherein the receiving controllers are disposed in a multi-screen display terminal, and each of the displays is connected to one of the receiving controllers.
5. A FC-AV protocol-based multi-screen splicing system according to claim 4, wherein the receiving controller comprises an SFP photoelectric module, a frame parsing module, a storage module and a video output module; after receiving the optical fiber video, the SFP photoelectric module converts the optical fiber video into an electric signal, the electric signal is transmitted to a frame analysis module, frame data analysis is carried out through serial-parallel conversion, a frame header is read to obtain video resolution, and a line-field synchronous clock is produced; and caching the read video data into a storage module.
6. A FC-AV protocol-based multi-screen splicing system as recited in claim 5 wherein the video output module is a video display chip that displays the cached video in a video format required by the video generation display.
7. A multi-screen splicing system based on FC-AV protocol according to claim 5 wherein each receiving end is burned with its own ID number, multiple display terminals only need to be randomly arranged, after the FC link is successfully established, the upper computer will issue a position decision command to handshake with the receiving ends of the display terminals to confirm the positions of the display screens one by one, and then perform the number re-programming on the upper computer.
8. A FC-AV protocol based multi-screen splicing system according to claim 2, wherein the asynchronous FIFO is further applied for clock domain isolation.
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Cited By (5)
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| CN111147767A (en) * | 2019-12-23 | 2020-05-12 | 天津津航计算技术研究所 | Multi-screen splicing method based on FC-AV protocol |
| CN112153353A (en) * | 2020-11-25 | 2020-12-29 | 南京创科信息科技有限公司 | Video resource integration and protocol conversion system based on emergency scene |
| CN112312045A (en) * | 2020-11-03 | 2021-02-02 | 深圳云瀚科技有限公司 | Video wall desktop image segmentation processing method and device, storage medium and system |
| CN115243072A (en) * | 2022-07-19 | 2022-10-25 | 上海晨驭信息科技有限公司 | Distributed video splicing system without switch |
| CN115379135A (en) * | 2022-07-19 | 2022-11-22 | 中电科思仪科技(安徽)有限公司 | FPGA-based video switching and splicing system implementation circuit and method |
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Application publication date: 20200228 |