TMS320C6416T的MPEG-4编码优化  

Optimization of MPEG-4 video encoder based on TMS320C6416T

作　　者：李桂菊[1] 陈秋萍[1] 纪华[1] 武治国[1] 刘艳滢[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2009年第12期3096-3102,共7页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.2006AA703405F)

摘　　要：MPEG-4是当前最具影响的多媒体数据压缩编码国际标准。针对视频编码过程中计算复杂度高,系统运算量大等特点,本文提出了在TMS320C6416T上实现MPEG-4编码的优化方法。为使MPEG-4编码器达到实时应用的要求,结合C64x DSP的特点,采取了一系列软件优化方法,包括合理分配存储器,在内存开辟双缓冲区结构,用汇编程序实现MPEG-4的核心算法以及对整个程序流程进行C语言级优化等。实验结果表明,该编码器可以对768 pixel×576 pixel,25 frame/s的视频图像进行实时编码。MPEG-4 is one of the most important and influential international multimedia data compression encorders. To meet the demands of a video encoding for the large computation load and strong computing power, a optimized encoding method of MPEG-4 based on TMS320C6416T is presented, According to the characteristics of C64x DSP, several kinds of methods for software optimization are proposed, which includes allocating memories in reason, setting two buffers in a memory based on the characteristic of EDMA, realizing a core code by linear assembly language and optimizing C language for whole programs. Experimental results show that the encoder can realize real-time encoding for video images with 768 pixel×576 pixel, in 25 frame/s.

关 键 词：视频压缩 MPEG-4标准 TMS320C6416T 软件优化 

分 类 号：TN919.81[电子电信—通信与信息系统]