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Device for transmitting multi-channel image/video code data through single SDI channel

A video coding and data transmission technology, applied in the direction of pulse modulation TV signal transmission, cable transmission adaptation, etc., to achieve the effect of improving reliability, broad market prospects, and reducing wiring complexity

Active Publication Date: 2014-11-12
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

[0005] In order to solve the problem of long-distance real-time transmission of massive data after lossless compression and encoding of large-resolution static images in image processing systems, the existing data transmission buses such as 1394 bus, FC bus, and Gigab Ethernet are in terms of data throughput and protocol complexity. 1. There are various deficiencies in the design cost. The purpose of the present invention is to provide a device that utilizes a single SDI channel to realize multi-channel image / video encoding data transmission. Through a data sub-frame with a sub-frame data information frame, multiple Image / video encoding data transmission of one channel, automatically send multiple image / video numbers, and automatically receive management data at the receiving end

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  • Device for transmitting multi-channel image/video code data through single SDI channel
  • Device for transmitting multi-channel image/video code data through single SDI channel
  • Device for transmitting multi-channel image/video code data through single SDI channel

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] The design of the present invention is mainly realized by FPGA, and the peripheral circuit has related SDI equalization driving device, which has the characteristics of flexible design, stable performance, and low cost. Xilinx XC7K410T FPGA with embedded SERDES module and peripheral configuration circuits, such as figure 1 shown.

[0036] LMH0302 supports SD-SDI, HD-SDI, 3G-SDI adaptive cable driver. It is capable of sending data to a 75 ohm coaxial cable in multiple rate modes. LMH0302 can work in a wide rate range of 125Mbps-2.97Gbps, and supports multiple standards such as SMPTE 259M, SMPTE 292M, SMPTE 344M and SMPTE 424M. You can choose to output SDI signals that meet the requirements of transmission rate, voltage swing, voltage conversion rate, etc. LMH0344 is an SDI equalizer. It supports the same standard and performance as LMH0302. It can a...

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Abstract

The invention discloses a device for transmitting multi-channel image / video code data through a single SDI channel. The device comprises a DDR SDRAM control logic module, a video / image compression coding module, an SDI rate mode selection module, an NRZI code insertion module, a CRC code insertion module, a data sub-frame generation control logic module and an SDI coding module. Multi-channel original video / image data cached in a DDR SDRAM are coded by a compression coder, the SDI rate mode selection module determines the SDI transmission rate and the error code verification mode, the data sub-frame generation control logic module is used for packaging sub-frame data, and then signals are output to an SDI driver through an SERDES channel after flow paths of SDI coding, parallel-serial conversion and the like. Through data sub-frames with sub-frame data information frames, multi-channel image / video code data transmission is achieved, multi-channel image / video serial numbers are automatically transmitted, and data are automatically received and managed at the receiving end.

Description

technical field [0001] The invention relates to a part of an image processing system, in particular to a device for realizing multi-channel image / video coded data transmission by using a single SDI channel. Background technique [0002] With the advancement of electronic technology and the demand for high-definition display, the data volume of images / videos is increasing. Even after compression coding, the amount of data is still amazing, making the mass data transmission of high-definition images / videos an urgent problem to be solved in image processing systems. One of the bottlenecks. In many applications, compressed coded data cannot be stored in the local system, and needs to be transmitted to a system at a certain distance for processing or storage, and requires high real-time performance, good reliability, and low bit error rate. In this case, engineers have to abandon PCI-E, SATA, RapidI / O and other high-speed, high-reliability internal buses with a transmission dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/10
Inventor 王大伟于乐张堃李超然
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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