| 一种高效的H.264帧内编码全零块判决算法 |
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| 引用本文： | 封颖,吴成柯,石迎波.一种高效的H.264帧内编码全零块判决算法[J].系统工程与电子技术,2007,29(7):1205-1208. |
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| 作者姓名： | 封颖 吴成柯 石迎波 |
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| 作者单位： | 西安电子科技大学综合业务网国家重点实验室,陕西西安710071 |
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| 基金项目： | 国家自然科学基金;国防重点实验室基金 |
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| 摘 要： | 分析了H.264帧内编码模式选择、整数变换和量化的特点,提出了一种帧内编码全零块判决算法。该算法根据相邻块的编码信息,使用动态判决门限判决量化后的全零块,避免了变换、量化等复杂过程。与已有的全零块判决算法相比,所提算法的全零块判决率最大可以达到87.8%,提高了帧内编码速度,可满足实时视频通信的要求。
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| 关 键 词： | 视频压缩 帧内预测 全零块判决 |
| 文章编号： | 1001-506X(2007)07-1205-04 |
| 修稿时间： | 2006年5月9日 |
Efficient detection algorithm for all-zero blocks in H.264 intra encoding |
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| FENG Ying,WU Cheng-ke,SHI Ying-bo.Efficient detection algorithm for all-zero blocks in H.264 intra encoding[J].System Engineering and Electronics,2007,29(7):1205-1208. |
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| Authors: | FENG Ying WU Cheng-ke SHI Ying-bo |
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| Abstract: | On analysis of the characters of intra mode selection,integer transform and quantization,an efficient algorithm is proposed to detect all-zero blocks of the encoding intra frame in H.264.In this method,dynamic selection of the threshold is used to examine the all-zero blocks in order to avoid the integer transform and quantization.Compared with the previous methods,the maximum percent of the all zero-blocks detected by the proposed algorithm in the intra macroblocks is 87.8%.It provides significant improvement of coding speed and can meet the needs of the video communication in real time. |
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| Keywords: | video compression intra prediction all zero-blocks detection |
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