低成本航空侦察视频压缩系统研究  

Research and Simulation of Low Cost Video Compress System for Aerial Reconnaissance

作　　者：董维中[1] 闫建国[1] 段镇[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《计算机测量与控制》2008年第8期1145-1148,1152,共5页Computer Measurement &Control

摘　　要：设计了一种无人机视频压缩与传输系统;采用TMS320C2812进行系统控制,通过集成图像传感器OV7620完成图像信号的采集和数字化处理,以ADV612芯片对采集图像进行小波变换;经过CPLD和DSP完成变换域数据的压缩和转换发送;图像的无线传输使用甚高频数字电台;地面站解码后,送入上位计算机进行图像处理;系统时间延迟较小,实时性较强,基本满足工程实际需要;对SPHIT算法中的零树结构进行改进,给出最小零树结构一种简单可行的划分策略,通过Matlab仿真实验对两种算法进行对比,结果表明改进措施有效。A video compress and transmission system for UAV was designed. TMS320C2812 was used for controlling the system, integrative image sensor OV7620 was used for acquisition of image signal and digital disposition, the CMOS chip ADV612 is used for wavelet of the image signal. The compress and conversion transmission of the data transform field were completed by CPLD and DSP. The VHF numeric broadcasting station was used for the wireless transmission of image. The data was sent to computer for image manipulation after decoding by ground station. The system had less time delay, and owned Real--time, it satisfied the needs of engineering. The improvement was proposed for the least zero tree configuration in SPHIT, a simple and feasible method for dividing was given. Digital simulation was carried out in Matlab environment , it concluded that the improvement had better effect by comparing with the two Algorithms.

关 键 词：视频压缩 无人机 甚高频 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] V243.5[自动化与计算机技术—计算机科学与技术]