| 基于梯度和率失真的帧间块模式选择算法 |
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| 引用本文： | 余胜生,苏曙光,周敬利,曹华.基于梯度和率失真的帧间块模式选择算法[J].小型微型计算机系统,2006,27(8):1560-1562. |
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| 作者姓名： | 余胜生 苏曙光 周敬利 曹华 |
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| 作者单位： | 华中科技大学,计算机学院,湖北,武汉,430074 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 提出一种适合于H．264标准的基于梯度且支持RDO的帧间块模式抉择算法．该算法根据梯度分布剔除某些可能性很小的模式，以减少RDO过程中的待选模式数量，达到快速选择模式的目的．实验表明该算法比在全部模式中执行RDO过程要节约80％左右的时间，而PSNR下降不超过2dB．
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| 关 键 词： | 块模式 梯度 率失真 |
| 文章编号： | 1000-1220（2006）08-1560-03 |
| 收稿时间： | 04 26 2005 12:00AM |
| 修稿时间： | 2005-04-26 |
Inter Block Mode Selection Method Based on Grads and Rate-Distortion |
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| YU Sheng-sheng,SU Shu-guang,ZHOU Jing-li,CAO Hua.Inter Block Mode Selection Method Based on Grads and Rate-Distortion[J].Mini-micro Systems,2006,27(8):1560-1562. |
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| Authors: | YU Sheng-sheng SU Shu-guang ZHOU Jing-li CAO Hua |
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| Abstract: | The paper proposed an inter block mode selection method based on gradient and rate-distortion for H. 264. Because the gradient is a good measure of local details and changes, the new method excluded some rarely-posslble modes according to the distribution of gradient, which helped to reduce evidently the number of modes and time of the RDO procedure. The experiments showed that the method could save time by 80% and the Y-PSNR drop was less than 2dB, compared with the full-mode RDO method. |
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| Keywords: | H 264 |
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