Research On Dual-Way Video Compression And Transmission System Based On ARM And DSP

With the continuous development of communication technology and video information,the amount of video data increases exponentially,and the compressed storage and transmission of UAV video are facing increasing pressure,which puts forward strict requirements for the compressed storage of UAV video compression and transmission system,and the UAV has become more complex in both application scenarios and specific functions.The delay and system stability of video codec are very strict requirements.The video compression and transmission system based on traditional DSP processor can not meet the demand of low delay and high quality compression.In order to solve the above problems in traditional video compression and transmission system,this paper uses the high performance DM6467 processor of high definition video codec Davinci series of TI company specifically to design the video compression and transmission hardware system,and improves the image compression method based on the standard H.264 algorithm combined with the deep learning algorithm.The results show that the system operation performance,video compression efficiency and low delay are effectively improved.This research mainly focuses on the specific design of UAV video compression and transmission system.The main research contents are as follows:(1)This paper studies the fast interframe motion estimation and lossless compression of the video codecs standard H.264.On the basis of analyzing the advantages and disadvantages of the H.264 algorithm,an improved adaptive neural network video compression enhancement technology is proposed by using the deep learning algorithm of convolutional neural network,and the results are compared with the mainstream video compression technology.The results show that This algorithm can not only enhance the computational performance,but also enhance the image quality.(2)Based on the high-performance DM6467 processor,the software and hardware systems of the video compression and transmission system are designed and implemented.Based on the multiple requirements of UAV image transmission,a design scheme based on ARM+DSP is developed,and the hardware circuit is built based on ARM+DSP.The acquisition circuit,storage circuit,power circuit and other peripheral circuits are designed.The improved H.264 algorithm is adopted to achieve the requirements of low time delay and high quality compression of the system.(3)The software and hardware test platform is built to test the key functions,performance and stability of the video compression and transmission system.The results show that the video compression and transmission system can ensure the high and stable operation of the system.Under the premise of high video quality,the delay is less than 120ms,which meets the design requirements.This system can make up for the shortcomings of military UAV in video processing to some extent,and provide strong technical support for winning the all-dimensional war such as information technology,integration and intelligence on the future battlefield.