摘要
基于块匹配的运动估计在视频编码中占有很重要的地位。针对H.264/AVC的特点,提出一种快速块匹配搜索算法。该算法充分利用宏块编码模式间的关联特性和运动矢量的统计特征,极大地提高了算法的搜索速度。与经典的搜索算法菱形搜索(DS)、十字—菱形搜索(CDS)和运动矢量场自适应搜索算法(MVFAST)相比,快速搜索算法在保持了与它们相当的搜索精度的同时,搜索速度分别提高了240.5%、149.9%和30.7%。
Block-matching based motion estimation plays an important role in video coding and compression.In this paper,based on characteristics of the H.264/AVC,we proposed a fast search algorithm for block matching.The algorithm well exploits the correlation between macro-block coding patterns and the statistic characteristics of motion vector,significantly increases the searching speed.Compared with the diamond search（DS）,the cross-diamond search（CDS） and the motion vector field adaptive search technology（MVFAST）,the algorithm presented in the paper can expedite the searching speed up to 240.5%,149.9% and 30.7% respectively,while maintain the similar search accuracy to these classical algorithms.
出处
《计算机应用与软件》
CSCD
2010年第6期210-212,235,共4页
Computer Applications and Software
