Research On Key Technologies Of Full HD Video Real-time Compression Coding And Storage

Video real-time compression coding and storage system is widely used in weapon equipment testing,acceptance,video parameter acquisition,compression and storage in daily maintenance and various monitoring systems.Aiming at the problems of low resolution of video acquisition and storage in traditional video acquisition and storage devices and the length of video storage,this paper carries out the research on the key technologies of full-HD video real-time compression coding and storage,which has important research significance and application price in space test,missile test,acquisition,transmission,processing and analysis of video image data during fighter flight.This paper mainly studies the related technologies of full HD video real-time compression coding and storage.The specific research work is as follows:(1)According to the actual needs and system indicators,the overall scheme of video real-time compression coding and storage system is designed.The principle and implementation scheme of video real-time compression coding technology and H.264 coding algorithm are studied.The HI3516 A multimedia development environment and the construction of development environment are also studied.The application program is designed based on MPP(software processing platform)of Hi3516 A development platform.In order to complete the real-time acquisition,processing and coding of full HD video.(2)The storage technology of FLASH array,the storage structure and working principle of FLASH are studied,and the logic program of each functional module based on FPGA is designed.The USB 2.0 interface circuit and the reading and writing function of FLASH array are realized.(3)Researching the read-back and upload of FLASH array video data and decoding and playback of compressed bitstream,designing the test scheme and building the test platform,verifying the functions of the whole system and each module,and analyzing and evaluating the test results.The test results show that all functions of the full HD video real-time compression coding and storage system designed in this paper are normal.After decoding,the video plays smoothly.The system can work steadily.The output stream of compressed video is 4 Mbps,and the PSNR value of reconstructed image is about 36 dB.The overall performance is good.