专用DSP环境下H.263算法编解码的实现  

Accomplish of H.263 Coding and Decoding under the Special DSP Environment

作　　者：王增丽[1] 谷俊丽[1] 何虎[1] 孙义和[1] 

机构地区：[1]清华大学微电子研究所,北京100084

出　　处：《微电子学与计算机》2009年第11期30-33,共4页Microelectronics & Computer

摘　　要：采用一款面向媒体应用的数字信号处理器来实现3GPP定义的可视电话视频标准H.263的编解码.针对该媒体信号处理器的体系结构及指令集的特点,采用单指令多数据、软件流水、专用指令等技术对H.263编解码算法的关键模块进行了优化,并对存储空间进行了优化,从而实现了大小可配置的图像的编解码,结果比TMS320C6201所用的周期数减少了40%.We implement H. 263 （by 3rd Generation Partnership Project, 3GPP） coding and decoding on a special DSP which is designed for the implement of multimedia applications. According to the characteristic of this DSP, we optimized the critical modules of H. 263 coding and decoding by completely using technologies of SIMD, software pipeline and special instructions and optimized the memory arrangement. We finally realized the H. 263 coding and decoding of the size - configured video frequency. Compared with TM8320C6201 and TM8320C6401, the total periodicity of our result is 40% less than the TMS320C6201 does.

关 键 词：H.263 数字信号处理 编码 解码 离散余弦变换 运动预测 

分 类 号：TN919.81[电子电信—通信与信息系统]