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一种新颖的H.264帧内预测快速算法

DOI: 10.13190/jbupt.200802.118.cuiyb, PP. 118-122

Keywords: 视频编码,帧内预测,模式选择

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Abstract:

提出了一种新颖的H.264帧内预测算法.该算法把9种4×4帧内预测(Intra_4×4)模式分为3类,用左面和上面相邻块的模式类预测当前4×4块适合采用的模式类;基于定义的变换系数索引加权绝对值和设计了一种新颖的Intra_4×4模式选择方法;利用连续I帧中16×16帧内预测(Intra_16×16)宏块位置的准平稳性降低了帧内预测的计算复杂度;利用亮度块和色度块帧内预测模式间的相关性加速了色度块的模式选择过程.实验结果表明,本文提出的帧内预测快速算法比JointVideoTeam(JVT)-G013平均节省了25%的编码时间,且编码率失真性能较好.

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