一种基于DSP的实时视频色彩空间转换算法  

A Real-time Video Color Space Conversion Algorithm Based on DSP

作　　者：王博[1] 王凯[1] 王骥[2] WANG Bo WANG Kai WANG Ji(China National Aeronautical Radio Electronics Research Institution, Shanghai, 200241, China Aeronautical Military Representative Bureau Resident in Shanghai Region for The Naval Force, Shanghai 200233, China)

机构地区：[1]中国航空无线电电子研究所,上海200241 [2]海军驻上海地区航空军事代表室,上海200233

出　　处：《航空电子技术》2017年第3期46-49,共4页Avionics Technology

摘　　要：DM642是广泛应用于视频处理领域的经典DSP平台,其视频采集端口可以采集多种视频制式,但无法直接接入色彩空间为YUV420的视频信号,而目前主流视频压缩算法都要求使用YUV420的视频数据。根据DM642的平台特点,优化实现了一套YUV422到YUV420的插值算法,解决了算法实时性的问题。测试结果表明,对于1024×768这种较大分辨率的视频图像表明,优化过的色彩空间转化算法能够以60帧每秒的速率进行实时转换,满足了后续视频压缩算法对实时性的要求。DM642 is a classic DSP platform which is widely used in the field of video processing. The video capture port can collect a variety of video formats, but it can＇t directly access the color space for the YUV420 video signal. The current mainstream video compression algorithms are required to use YUV420. An optimized YUV422 to YUV420 interpolation algorithm is introduced according to the characteristics of the DM642 platform, thus the problem of real-time dealing with the color space conversion is finally resolved. The testing results demonstrate that for the video resolution of 1024×768 , optimized color space conversion algorithm can perform real-time conversion at a rate of 60 frames per second, meeting the real-time requirements of the subsequent video compression algorithm.

关 键 词：数字信号处理器(DSP) DM642 色彩空间 YUV420 

分 类 号：TP311.561[自动化与计算机技术—计算机软件与理论]