| 一种基于UMHexagonS的运动估计优化算法 |
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| 引用本文： | 郭少校,谭兮,宗亮. 一种基于UMHexagonS的运动估计优化算法[J]. 湖南人文科技学院学报, 2012, 0(2): 98-101 |
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| 作者姓名： | 郭少校 谭兮 宗亮 |
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| 作者单位： | 1. 湖南工业大学电气与信息工程学院,湖南株洲,412000
2. 湖南人文科技学院通信与控制工程系,湖南娄底,417000 |
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| 摘 要： | UMHexagonS算法是H.264/AVC所采纳的整像素的快速运动估计算法之一,该算法在保持良好的率失真性能的前提下,相比全搜索算法(FS)可节约70%的运算量。根据UMHexagonS算法的特点,可从三个方面对该算法进行优化:加入零运动块判决;改进的5*5螺旋搜索;优化的多层次六边形搜索。仿真实验结果表明,在保证PSNR和码率几乎不变的情况下,优化算法可有效降低运动估计时间,从而提高H.264/AVC编码器的实时性。
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| 关 键 词： | UMHexagonS 运动估计 优化 |
A Motion Estimation Algorithm Based on UMHexagonS |
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| GUO Shao-xiao,TAN Xi,ZONG Liang. A Motion Estimation Algorithm Based on UMHexagonS[J]. Journal of Hunan Institute of Humanities,Science and Technology, 2012, 0(2): 98-101 |
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| Authors: | GUO Shao-xiao TAN Xi ZONG Liang |
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| Affiliation: | 1.Institute of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412000,China;2.Department of Communication and Control Engineering,Hunan Institute of Humanities,Science and Technology,Loudi 417000,China) |
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| Abstract: | UMHexagonS is one of the fast motion estimation algorithms adopted by H.264.It saves nearly 70% computational work compared with the Full Search Algorithm,and still keeps a good rate-distortion quality.The characteristic of UMHexagonS is analyzed,and then three improvements are proposed,including zero-motion block pre-determination after starting point prediction;improvement on 5*5 spiral search;optimized multi-grid hexagon search.Experiment results showed that the algorithm could save motion estimation time effectively and improve the real-time performance of the encoder with little change in PSNR and bite-rate. |
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| Keywords: | UMHexagonS motion estimation optimization |
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