| 基于宏块特征的H.264快速帧内预测算法 |
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| 引用本文： | 刘鹏宇,何絮,贾克斌,谢晶.基于宏块特征的H.264快速帧内预测算法[J].北京工业大学学报,2010,36(2). |
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| 作者姓名： | 刘鹏宇 何絮 贾克斌 谢晶 |
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| 作者单位： | 北京工业大学电子信息与控制工程学院; |
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| 基金项目： | 北京市自然科学基金资助项目(4062005);;北京市人才强教计划资助项目(00627);;国家自然科学基金资助项目(60672050) |
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| 摘 要： | 为了降低H.264的计算复杂度以满足实时应用,在对H.264帧内编码模式深入研究的基础上,提出利用宏块灰度直方图特征在Intra4×4和Intra16×16模式中预判,针对Intra4×4模式采用基于子块预测方向特征的快速帧内预测算法.综合以上2种优化策略,该优化算法平均码率增加了3.2%,峰值信噪比基本不变的情况下,编码速度平均提高了32.8%.
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| 关 键 词： | 视频编码 快速帧内预测算法 宏块编码 H.264/AVC 帧内模式 |
Fast Intra-frame Prediction Algorithm Based on Characteristic of Macro-block for H.264/AVC Standard |
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| LIU Peng-yu,HE Xu,JIA Ke-bin,XIE Jing.Fast Intra-frame Prediction Algorithm Based on Characteristic of Macro-block for H.264/AVC Standard[J].Journal of Beijing Polytechnic University,2010,36(2). |
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| Authors: | LIU Peng-yu HE Xu JIA Ke-bin XIE Jing |
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| Affiliation: | College of Electronic Information and Control Engineering;Beijing University of Technology;Beijing 100124;China |
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| Abstract: | To reduce the encoding time for H.264 and apply it to the real-time practice,on the basis of the research on the block size prediction of intra frame and according to the histogram algorithm,an intra 4×4 mode or intra 16×16 mode for every macro-block are selected before coding.If the intra 4×4 prediction mode is chosen,then the fast algorithm based on the characteristic of macro-block itself is used to reduce the choices for predicted directions.Experimental results show that without the variety of PSNR,the compression time is 32.8% less than that of the original and it increases 3.2% bits rate. |
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| Keywords: | video coding fast intra-frame prediction algorithm block codes H 264/AVC intra-frame mode |
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