小波域中几种块匹配运动估计的比较研究  

A comparative study of several block matching motion compensation in wavelet domain

作　　者：王光学[1] 曹长修[1] 王健 孙光宇[2] 

机构地区：[1]重庆大学自动化系,400044 [2]贵州教育学院计算中心,贵阳550003

出　　处：《计算机工程与设计》1999年第6期10-13,共4页Computer Engineering and Design

基　　金：贵州省教委科学基金

摘　　要：运动估计是视频编码中的主要技术之一。在小波域中，根据子图像之间的相关性，可以由对最低频子图像或较低频的几个子图像作运动估计获得的位移矢量去预测其余子图像的位移矢量，由此将产生多种运动估计方案。对这些方案进行比较研究，结果表明只对最低频子图像作运动估计的方案具有最好的性能与复杂度比。Motion compensation is one of main technique in video coding. In wavelet domain, according to the interband correlation, the displacement vectors of the other subimages could be predicted by the dis- placement of coming from the motion estimation of the lowest frequence subimage or several lower frequence subimages, resulting in several motion estimation schemes. The paper makes a study and a comparison of several motion estimation schemes based on whole search. It could be concluded that the scheme of motion estimation of only the lowest frequence subimage possesses the best performance/complexity ratio.

关 键 词：视频编码 运动估计 小波域 块匹配 熵编码 

分 类 号：TN919.8[电子电信—通信与信息系统] TP391.41[电子电信—信息与通信工程]