基于AVS-M的亚像素运动估计快速算法  

Fast Algorithm of Sub-pixel Motion Estimation Based on AVS-M

作　　者：张新安[1] 宫彦军[1] 陈爱武[1] 

机构地区：[1]湖南科技学院电子工程系,湖南永州425100

出　　处：《计算机工程》2010年第24期214-216,共3页Computer Engineering

基　　金：湖南省科技厅科技发展计划基金资助项目(2009FJ4062);湖南省教育厅高等学校科学研究基金资助项目(08C364)

摘　　要：提出一种适用于AVS-M基于预测的亚像素运动估计快速搜索算法。分析亚像素候选点的匹配误差关系以排除可能性小的点,保证亚像素搜索的准确性。采用有效的搜索策略,对于不同运动特征的视频序列,在平均PSNR下降不超过0.01 dB的情况下,该算法与亚像素全搜索算法相比,减少了68.50%～87.69%的搜索点数,与中心偏置亚像素搜索算法相比,减少了44.68%～67.38%的搜索点数。This paper proposes a kind of fast search algorithm which is apt for AVS-M based on predicted sub-pixel Motion Estimation（ME）. The algorithm expels the less possibility points by doing matching error relation of sub-pixel points selected analysis, which assures the accuracy of sub-pixel search. Through effective search strategy, compared with the half-pel full search algorithm and Center Biased Fractional Pixel Search（CBFPS）, experiments show that the proposed algorithm can respectively reduce the sub-pel search points by 68.50%-87.69% and 44.68%-67.38% on average PSNR lost less than 0.01 dB to the video sequences with different motion characteristics.

关 键 词：视频编码 亚像素运动估计 预测矢量 

分 类 号：TN919.81[电子电信—通信与信息系统]