一种改进的快速块匹配运动估计算法  

An Improved Fast Motion Estimation Algorithm Based on Block-Matching

作　　者：汪烈军[1] 覃锡忠[1] 

机构地区：[1]新疆大学信息学院,新疆乌鲁木齐830046

出　　处：《微电子学与计算机》2007年第6期204-206,共3页Microelectronics & Computer

摘　　要：为了提高运动向量估计算法的速度和精度,提出了一种改进的快速块匹配运动估计算法:依据之前宏块的运动向量,估计当前宏块各可能的运动向量对应的概率值,组成和搜索窗口同样大小的概率矩阵,并根据概率大小限制搜索的次数。仿真结果表明:与标准菱形搜索法相比,在精度略有提高的同时,有效的提高了搜索效率。In order to make block motion estimation algorithm faster and more accurate, a fast motion estimation algorithm is proposed in the paper. In the algorithm, every possible motion vector＇s probability of current macro block is estimated by the previous macro blocks＂ motion vectors, and constitutes the probability matrix whose size is as the same as the search window＇s. The algorithm restricts the number of pixels to search by probability. From the results of experiment, comparing the proposed algorithm and diamond search algorithm, it shows that the veracity not only be improved , hut the sneed RTOWn faster at the same time.

关 键 词：视频压缩 运动估计 块匹配算法 概率矩阵 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]