遥测视频图像采集压缩系统的设计与实现  

Design and Implementation of Telemetry Video Capture and Compression System

作　　者：张会新[1,2] 孙伟[1,2] 辛海华[1,2] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《电视技术》2015年第3期43-45,共3页Video Engineering

基　　金：国家自然科学基金项目(61335008)

摘　　要：由于空间遥测图像的数据量大,通信带宽有限,所以对遥测图像进行压缩编码,节省传输时占用带宽资源和减少数据存储量,才能将遥测信号更可靠、全面地进行传输或是存储到记录器中留待分析使用。综合遥测系统在传输图像时要在尽量小的空间中最大化地采集和传输图像信息的特殊要求,设计采用FPGA+专用视频解码芯片ADV7180来实现视频图像采集模块的功能,采用FPGA+专用图像压缩芯片ADV212来完成视频图像压缩功能的设计。最终实现了压缩率约为25倍,压缩后的数据传输速率达到40 Mbit/s的视频图像采集压缩系统。该系统具有体积小、成本低、可靠性高、开发周期短等优点。Due to the large data flow of the space telemetry images and the limited communication bandwidth, the images are com- pressing coded to save bandwidth resources and the amount of data storage in the process of transmission which can transmit the te- lemetry signal more reliably and fully or record it for the post-analysis. Considering the special requirements of acquisition and transmission of the image information at the telemetry system to maximize the transmission of images in a minimum space, the func- tional modules by using FPGA and dedicated video decoder chip ADV7180 are designed to perform video acquisition. Also, the FP- GA and dedicated image compression chip ADV212 is used to design the video compression system. Ultimately, the video capture and compression system with compression rate about 25 times and data transfer rate of 40 Mbit/s is achieved. The system has advan- tages of small size, low cost, high reliability and short development cycle etc.

关 键 词：空间遥测 图像采集压缩 ADV7180 ADV212 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]