基于PC机的MPEG-4编码原理研究及实现  

Research and Implementation of MPEG-4 Coding Theory Based on PC

作　　者：梁伟伟[1,2] 李玉山[1,3] 刘洋[3] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]中国科学院研究生院,北京100039 [3]西安电子科技大学,陕西西安710071

出　　处：《现代电子技术》2009年第24期137-140,共4页Modern Electronics Technique

基　　金：陕西省自然科学基金资助项目(2007F05)

摘　　要：为了研究MPEG-4编码器的实现原理和影响编码效果的参数,这里简要介绍MPEG-4视频标准,详细分析形状编码、DC和AC预测、之字型扫描、游程编码和熵编码、运动估计与补偿等编码模块,调试并运行DIVX版本的MPEG-4 C语言编解码器,修改不同的编码参数,生成了不同大小的divx文件。实验结果表明,MPEG-4视频编码器的编码效果受各个编码参数的影响,透过参数调整可以达到最好的压缩效果。In order to study the working principle of MPEG- 4 encoder and impact of encoding parameters,the MPEG-4 video standard is introduced briefly,and some coding modules such as the shape encoding,DC and AC prediction,zigzag scan ning, run-length coding and entropy coding, motion estimation and compensation etc are analysed in detail, MPEG -4 C language codec is debugged based on DIVX version to generate divx files of different sizes by modifying different encoding parameters. Experimental resuhs show that the MPEG- 4 encoding effect is influenced by various encoding parameters and the best encoding effect is realized by adjusting those parameters.

关 键 词：MPEG-4 编码器 DC和AC预测 运动估计与补偿 

分 类 号：TN919.81[电子电信—通信与信息系统]