运用运动矢量的中心偏向性改进三步搜索算法  

Improving Three Step Search Algorithm According to Central Preference of Motion Vectors

作　　者：须明[1] 王博[1] 何亦征[1] 方向忠[2] 

机构地区：[1]中国航空无线电电子研究所,上海200233 [2]上海交通大学信息工程学院,上海200030

出　　处：《计算机工程与应用》2006年第34期50-52,共3页Computer Engineering and Applications

摘　　要：在视频图像压缩算法中,运动估计的目的在于在参考帧中寻找最相似的匹配块,使匹配后的残差最小。由于目前的运动估计算法仅适用于平移运动,小残差的运动匹配往往发生在搜索窗口的中心位置附近,快速的三步搜索算法没有考虑到这些情况,文章就此对其改进,提出了改进的三步搜索算法,实验结果证明了改进的合理性和有效性。The purpose of motion estimation in video encoding is to search the best fitness of the block with little residue,As the ME only performs well with the displacement parallel to the image plane,which usually happens proximately at the points near the center of search window,the nature of this central bias property should fully be considered in ME process.The paper proposes an improved algorithm of the Three Step Search based on the above opinion. The experiment results have proved its efficiency.

关 键 词：视频压缩 运动估计 三步搜索算法 改进的三步搜索算法 

分 类 号：TN919.8[电子电信—通信与信息系统]