| H.264中的熵编码技术分析与实现 |
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| 引用本文： | 徐忱,张宗橙.H.264中的熵编码技术分析与实现[J].金陵科技学院学报,2006,22(1):23-26. |
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| 作者姓名： | 徐忱 张宗橙 |
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| 作者单位： | 南京邮电大学,江苏,南京,210003 |
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| 摘 要： | 主要分析了H.264中两种熵编码技术:CABAC和CAVLC。并对这两种编码技术在ADSP-BF537的实现和编码效率进行了对比,对比结果显示,对于不同的图象内容,CABAC的编码效率高出CAVLC的编码效率的比例不同,对于静止图象和运动量低的图象序列,CABAC优于CAVLC大概在为11%,同时CABAC的计算量要高出CAVLC 95%,而对于运动量大的图象序列,CABAC优于CAVLC大概为6%,同时CABAC的计算量要高出CAVLC 140%。
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| 关 键 词： | 算术编码 可变长编码 编码效率 计算复杂度 |
| 文章编号： | 1672-755X(2006)01-0023-04 |
| 修稿时间： | 2005年11月12 |
Analysis and Implementation of Entropy Coding in H. 264 |
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| XU Chen,ZHANG Zong-cheng.Analysis and Implementation of Entropy Coding in H. 264[J].Journal of Jinling Institute of Technology,2006,22(1):23-26. |
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| Authors: | XU Chen ZHANG Zong-cheng |
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| Abstract: | The paper discusses two methods of entropy coding in H.264: CABAC and CAVLC,compares the coding efficiency of the too methods on ADSP-BF537,which proves that CABAC has higher coding efficiency than CAVLC,and the exact difference is due to the content of the picture.Compared with CAVLC,CABAC provides a reduction in bit rate about 11% for the picture queue with a small quantity of movement,and an increase in calculation about 95%.When coding a picture queue with a mass of movement,CABAC provides a reduction in bit rate about 6%,and an increase in calculation about 140%. |
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| Keywords: | CABAC CAVLC coding efficiency calculation |
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