H.264视频编码在数码监控系统中的应用研究

The research of H.264 Video Encoding application in digital video monitor systems

目前数码视频监控系统大多采用MPEG1、MPEG2的编码标准,导致视频存储成本高,网络负载重.H.264比以前的视频编码标准可以节省50%以上的码率,因此在视频监控中具有很大的应用前景,但其编解码器也很复杂.为了达到实时压缩的目标,文章从三个方面来提高其运算速度:①优化帧间模式的选择;②调整内插算法的运行结构;③采用MMX、SSE汇编优化.

Nowadays most digital video monitor systems are using MPEG1 or MPEG2 encoding standard, which leads to high cost of video storage and network translation load. H. 264 Encoding standard is able to save more than 50% bit rates than the video encoding standards before. Therefore there is a promising wide area of H. 264 application in the future. But its encoders and decoders are quite complicated. To achieve the goal of real time encoding, we have improved the computation rate in three aspects： （1）Optimizing the inter frame mode decision; （2）Adjusting run-time structures of interpolation algorithm; （3）Using MMX and SSE to optimize the compilation.