Research On Algorithm And Technology Of Image Enhancement For Remote Video Transmission

With the rapid integration of modern industrialization and information,and civilian long-distance video real-time transmission requirements are getting higher and higher.High Definition Multimedia Interface interface as a mainstream digital video interface,the transmission rate is extremely high but can not be used by long-distance transmission,commonly long-distance network video transmission technology can achieve long-distance transmission of the signal,but the delay-time is about 500 ms or more,and some special industries and applications scenes(ship and air traffic control systems,etc.),requiring video signal transmission delay-time is less than 100 ms,and ordinary transmission technology does not meet the requirements,what's more,limiting its application.Aiming at the long-distance transmission of high-definition video streaming and the low latency of high-speed video streaming,we have researched many mainstream video compression algorithms.Finally,we choose to use high-speed parallel processing of Field-Programmable Gate Array,and Dimensional integer discrete cosine transform is used as the algorithm of intra-frame compression.The boundary error is reduced by optimizing the quantization method,then the arithmetic is coded and processed,and it transfer through the wired network or wireless channel.The receiving end decapsulates,decodes and adds zero mean Noise processing to restore the original data content.Finally,in this article for physical verification and testing.Taking into account the high-definition video streaming is a large data transmission,coupled with a low latency requirements,so the choice of hardware,the design of a Xilinx Field-Programmable Gate Array and Acorn RISC Machine core closely integrated chip Zynq-7000 as the sender platform and Samsung's Exynos-4412 processor as a receiving platform.The advantages of using Field-Programmable Gate Array chip are the high speed processing of digital signal,and the advantage of using Acorn RISC Machine is the task scheduling and the portability of the operating system.The hardware and software are co-designed to greatly realize the real-time performance of Field-Programmable Gate Array and the flexibility of Acorn RISC Machine.Thirdly,a low complexity,stream stability and low latency video compression algorithm and optimization quantization method are proposed to reduce the boundary error in this design.To realize the realization of this algorithm and the hardware and software development and software platform part of the building,and the system of the various functional modules were tested to verify the correctness of the design.