基于DM642的X264移植及优化  

Migrating and Optimizing X 264 Algorithm Based on DM 642 Platform

作　　者：黄新[1] 曹铁勇[2] 黄辉[3] 商晓燕[1] 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院电子信息工程系,江苏南京210007 [3]解放军理工大学通信工程学院研究生2队,江苏南京210007

出　　处：《军事通信技术》2008年第4期15-19,共5页Journal of Military Communications Technology

摘　　要：X264算法需要经过移植和优化才能满足实时处理的要求。文中首先分析了如何向DM642平台上移植X264代码,通过存储器优化、线性汇编改写等一系列优化措施实现了摄像头实时采集视频、编码及显示。最后完成了采集、回放独立编码运行于后台的Ping-Pong机制。实验表明,对CIF格式视频编码性能由优化前不足0.5帧/s达到20帧/s以上,此时PSNR下降不足3 dB。General H.264 algorithm needs migrating and optimizing to satisfy the require-ment of real-time realization.This paper specified the method to migrate X264 codes from PC platform to the DM642 platform as well as the method to optimize the migrated codes based on linear assembly at length.The experimental results show that the decoded video keeps its high quality with only a little loss of decoding performance and reduces the time-consuming in video collected process.

关 键 词：实时实现 运动搜索 视频压缩 线性汇编 

分 类 号：TN91[电子电信—通信与信息系统]