基于全局运动补偿编码的H.263编码器  

H.263 Video Coding Based on Global Motion Compensation

作　　者：郭丽[1] 龚声蓉[1] 

机构地区：[1]苏州大学计算机科学与技术学院,江苏苏州215006

出　　处：《小型微型计算机系统》2007年第5期914-919,共6页Journal of Chinese Computer Systems

基　　金：江苏省自然基金科学基金项目(BK2003029)资助;铁道部"铁路信息科学与工程"开放实验室基金项目(TDXX0501)资助

摘　　要：全局运动补偿编码是一种基于模型的编码方法,它可以提高编码效率,改善编码图像的质量.全局运动补偿是建立在全局运动估计基础上的,本文对现有的全局运动估计算法进行研究,提出了改进算法,并在H.263编码器上实现了全局运动补偿编码.通过标准测试序列的测试,可以看到基于全局运动补偿编码的H.263编码器的编码效率有了明显提高,同时提出的全局运动估计算法无论是计算时间还是计算准确性都要优于现有算法.Global motion compensation coding is a novel coding method based on models. Its coding efficiency is higher than that of conventional coding method with motion compensation, and so is the coded images＇ quality. The foundation of global motion compensation is global motion estimation. In this paper, Global motion estimation and its application in H. 263 coding are studied and its improved method is proposed. Comparative experiments utilize some standard sequences with global motion are performed. From the experimental results, conclusion can be made that the H. 263 coding＇ s efficiency which based on global motion compensation is improved and the new global motion estimation algorithm is superior in computation and accuracy.

关 键 词：全局运动估计 全局运动补偿 局部运动补偿 H.263 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]