运动估计中双模板设计与自适应模板选取  

Fast Motion Estimation Strategy with Double Search Patterns and Adaptive Pattern Selection

作　　者：张颖[1] 沈庭芝[1] 田卉[1] 张健[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2009年第8期713-717,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(60772066)

摘　　要：通过编码标准测试序列,分析了运动估计算法中计算量的分配和不同模板的性能,为兼顾速度和准确度,选择了双模板策略,并进一步给出了自适应的模板选取方法.实验结果数据表明,小模板可以提高运动估计算法的效率,大模板可以保证搜索的准确度.该自适应双模板搜索算法能够以151倍于快速全搜索算法的速度,实现与其近似的峰值信噪比、码率性能.Pattern search is the essential part of all fast search motion estimation algorithms of MPEG-4 or H. 264 standard. Efficient search patterns can improve the performance of the existing fast search algorithm. In this paper is analyzed the computation distribution of the blockbased fast search motion estimation algorithm and the performance of different search patterns. In order to speed up the motion search procedure while maintaining the quality of the decoded sequence, we chose the double search patterns strategy, and suggested an adaptive pattern selection method. The experimental result showed that the small pattern can improve the search efficiency and the large pattern can search algorithm can achieve very guarantee the search accuracy. This adaptive double pattern similar PSNR and bits performance compared with partial distortion fast full search algorithm, wh le it has a speedup of 151 in real-time .

关 键 词：视频编码 运动估计 运动矢量 搜索模板 

分 类 号：TN919.81[电子电信—通信与信息系统]