摘要
在基于PNX1500DSP的视频监控系统中实现了H.264视频编码器,提出了一系列优化方案:利用PNX1500的MBS硬件处理能力计算半像素插值;在算法级简化了运动估计,提前判断宏块的跳过模式;在代码级,利用定制运算及编译优化选项,进一步提高了编码速度。测试结果表明,优化后的编码器可以实现对CIF格式视频流的实时编码。
Gives an implementation of H.264 video encoder in a video monitoring system based on PNX1500 DSP platform,and proposes a series of optimization solutions：Firstly,calculates half-pixel interpolation using the MBS hardware of PNX1500;Secondly on H.264 algorithm level,predigests motion estimation and brings forward skip mode decision for macroblocks;Thirdly on code level,improves coding speed by using custom operations and compilation optimization options.Simulation results show the optimized encoder can encode CIF-format video stream in real time.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第16期99-102,共4页
Computer Engineering and Applications
基金
国家重点基础研究发展规划(973) (the National Grand Fundamental Research 973 Program of China under Grant No.2007CB307100
No.2007CB307106)
