| Fast Sub-Pixel Motion Estimation Algorithm For H.264 |
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| 作者姓名： | 李华 胡浩 高伟 |
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| 作者单位： | School of Electronic Information Engineering Tianjin University，School of Electronic Information Engineering Tianjin University，School of Electronic Information Engineering Tianjin University，Tianjin 300072 China，Tianjin 300072 China，Tianjin 300072 China |
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| 基金项目： | Supported by Electronic Information Industry Foundation of China （No. [2005]635）. |
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| 摘 要： | The latest international coding standard H.264/AVC1]extends motion compensation to quarter-sampleaccuracy2]. Generally,integer-pixel motion search costsmuch more time than sub-pixel search during which 16points are checked in total when implemented in f…
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| 关 键 词： | 电子运动 像素 运动评价 组织特性 |
| 修稿时间： | 2007-03-02 |
Fast Sub-Pixel Motion Estimation Algorithm For H.264 |
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| LI Hua,HU Hao,GAO Wei.Fast Sub-Pixel Motion Estimation Algorithm For H.264[J].Transactions of Tianjin University,2007,13(4):286-290. |
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| Authors: | LI Hua HU Hao GAO Wei |
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| Institution: | School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | A novel fast sub-pixel search algorithm is proposed to accelerate sub-pixel search. Based on the features of predicted motion vector (PMV) and texture direction observed, the proposed method effectively filters out impossible points and thus decreases 11 searched points in average during the sub-pixel search stage. A threshold is also adopted to early terminate the sub-pixel search. Simulation results show that the proposed method can achieve up to 4.8 times faster than full sub-pixel motion search scheme (FSPS) with less than 0.025 dB PSNR losses and 2.2% bit-length increases. |
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| Keywords: | H 264 motion estimation sub-pixel predicted motion vector texture characteristic |
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