基于ADSP-BF561的H.264熵编码实现及优化  

Implementation and Optimization of H.264 Entropy Coding Based on ADSP-BF561

作　　者：李荣[1] 胡薇薇[1] 张其善[1] 杨东凯[1] 

机构地区：[1]北京航天航空大学,北京100083

出　　处：《微计算机信息》2008年第29期26-28,共3页Control & Automation

基　　金：国家自然科学基金资助项目(60602046)

摘　　要：熵编码是影响H.264编码器效率的关键模块之一。本文基于ADSP-BF561硬件平台,深入研究了基于上下文的自适应变长编码(CAVLC),并在此基础上根据DSP的硬件结构和指令,对模块各个部分进行针对性的优化。实验证明,经过优化后的熵编码模块大幅度地提高了运算效率,满足实时性的要求。Entropy Coding has a great impact on the performance of H.264 encoder. Based on ADSP-BF561 platform, this paper made an in-depth study on context-based adaptive variable length coding （CAVLC）, and proposed an optimization strategy which could significantly reduced the time-consumption. Experimental results show that the proposed optimization strategy substantially improved the efficiency of the real-time H.264 encoder.

关 键 词：H.264 熵编码 变长编码 ADSP—BF561 

分 类 号：TN919.81[电子电信—通信与信息系统]