| H．264中亚像素运动估计算法的优化 |
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| 引用本文： | 王建 朱秀昌. H．264中亚像素运动估计算法的优化[J]. 南京邮电学院学报(自然科学版), 2005, 25(4): 48-51 |
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| 作者姓名： | 王建 朱秀昌 |
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| 作者单位： | 南京邮电大学信息工程系,江苏南京210003 |
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| 摘 要： | 通过对H．264参考模型JM61e中运动估计算法进行分析，对整像素、1／2像素和1／4像素搜索提出了改进策略。采用自适应阈值搜索停止算法，减少了运动估计的搜索次数，且保持运动估计的精度不变。采用自适应阈值搜索停止算法，减少了运动估计搜索次数，并且基本保持运动估计的精度不变。实验结果表明，该策略在重建图像质量略有下降的情况下明显提高了编码速度。
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| 关 键 词： | H．264 运动估计 菱形搜索 编码优化 |
| 文章编号： | 1000-1972（2005）04-0048-04 |
| 收稿时间： | 2004-09-24 |
| 修稿时间： | 2005-01-23 |
The Optimization Scheme of Sub-Pixel Motion Estimation Algorithm in H. 264 |
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| Wang Jian;Zhu XiuChang. The Optimization Scheme of Sub-Pixel Motion Estimation Algorithm in H. 264[J]. Journal of Nanjing University of Posts and Telecommunications(Natural Science), 2005, 25(4): 48-51 |
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| Authors: | Wang Jian Zhu XiuChang |
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| Abstract: | This paper first analyzes the motion estimation algorithm in the JM6, which is the reference model of H. 264 and then brings forward improved scheme for the motion search of integer pixel, half pixel and one forth pixel. It adopts adaptive threshold stopping algorithm so as to decrease the time of motion search and keep the motion search resolution unchanged. The experiment results have shown that this scheme increases encoding speed with little quality degradation of the reconstructed image. |
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| Keywords: | H. 264 Motion estimation Diamond Search Coding optimization |
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