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一种改进的快速块匹配运动估计算法 被引量:4

An Improved Fast Motion Estimation Algorithm Based on Block-Matching
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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.
出处 《微电子学与计算机》 CSCD 北大核心 2007年第6期204-206,共3页 Microelectronics & Computer
关键词 视频压缩 运动估计 块匹配算法 概率矩阵 video compression motion estimation block- matching algorithm probability matrix
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参考文献7

  • 1周翔,龚声蓉.运动估计中一种基于分级搜索的快速菱形算法[J].微电子学与计算机,2005,22(10):168-170. 被引量:2
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二级参考文献5

  • 1Xuan Jing, Lap-Pui Chau. An Efficient Three-Step Search Algorithm for Block Motion Estimation. IEEE Transcations on Multimedia, June 2004, 6(3): 435-438.
  • 2Shijun Sun, Shawmin Lei. Predictive Motion Estimation with Global Motion Predictor. SPIE Visual Commucations and Image Processing, 2004: 408-415.
  • 3Video Coding for Low Bitrate Communication International Telecommunication Union. ITU-T Recommendation H.263,1995.
  • 4T Wiegand, G Sullivan, G Bjontegaard, et al. Overview of the H.264/AVCVideo Coding Standard. IEEE Transactions on Circuits and Systems for Video Technology, 2003,13(7): 560-576.
  • 5龚涛,丁润涛.一种改进的有效运动估计方法——准菱形搜索法[J].中国图象图形学报(A辑),2002,7(11):1181-1186. 被引量:6

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