基于TMS320DM642的H.264六抽头滤波插值的优化  

Optimization of 6-tap Filter Interpolation in H.264 Based on TMS320DM642

作　　者：何苏勤[1] 延瑾瑜[1] 

机构地区：[1]北京化工大学DSP与嵌入式系统研究室,北京100029

出　　处：《电视技术》2009年第10期18-20,共3页Video Engineering

基　　金：国家自然科学基金项目(60473032)

摘　　要：在分析了H.264压缩编码算法中各个模块耗时情况的基础上,结合TMS320DM642的硬件特性对耗时占总程序将近10%的六抽头滤波插值部分进行优化,分别采用了使用内联函数、数据打包、改变垂直方向插值的数据结构、EDMA乒乓缓冲等方法。实验结果证明,在相同编译选项的情况下,优化以后插值部分的程序运行速度提高了近一倍。The time-consuming of all modules in H.264 is analyzed, and the profile results show that the 6-tap filter interpolation takes almost 10% time in H.264 encoder. This procedure according to the hardware feature of the TMS320DM642 chip is optimized. The optimizing methods include using intrinsic, packed-data processing, changing the data-base of vertical interpolation procedure and using EDMA PING-PONG buffering. Experiment results show that at the same build options, the processing speed of sub-pixel interpolation is improved by twice.

关 键 词：H.264 六抽头滤波插值 TMS320DM642 优化 

分 类 号：TN919.8[电子电信—通信与信息系统]