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。
关键词:
视频编码,
亚像素运动估计,
预测矢量
Abstract:
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.
Key words:
video coding,
sub-pixel Motion Estimation(ME),
prediction vector
中图分类号:
张新安, 宫彦军, 陈爱武. 基于AVS-M的亚像素运动估计快速算法[J]. 计算机工程, 2010, 36(24): 214-216.
ZHANG Xin-An, GONG Pan-Jun, CHEN Ai-Wu. Fast Algorithm of Sub-pixel Motion Estimation Based on AVS-M[J]. Computer Engineering, 2010, 36(24): 214-216.