将MPEG2转换为MPEG4标准的视频编码器的实现  

Implementation of a Video Encoder Used to Transform MPEG2 to MPEG4

作　　者：杨永杰[1] 

机构地区：[1]南通大学电子信息学院,江苏南通226007

出　　处：《计算机工程与应用》2005年第30期115-117,共3页Computer Engineering and Applications

基　　金：江苏省南通市制造业信息化计划项目(编号:C3019)

摘　　要：该文提出并实现了一个基于MPEG4的快速高效存储的视频编码器,用它把一个MPEG2视频数据流转换为一个低比特率、低空间分辨率的MPEG4流,并进行无线视频处理。与现有编码器相比,它不仅能够大大地节省实际需要存储空间,计算复杂度也降低了许多,实验结果表明该编码器得到的视频质量与像素领域方法得到的视频质量相当。In this paper,we propose and present a fast and memory efficient video encoder to convert a MPEG2 video bit stream into a low bit rate MPEG4 stream with low spatial resolution for wireless video access.Compared to existing approaches,the proposed video encoder can save more required memory.Furthermore,the computational complexity of the proposed method is less than a lot of that required by existing methods.However,the video quality achieved by the proposed method and by existing methods is hardly distinguishable,as shown in our experimental results.

关 键 词：MPEG2标准 MPEG4 像素域 运动估计 变长编码 比特流 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]