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二维直方图的HEVC帧内快速深度决策算法

DOI: 10.11830/ISSN.1000-5013.2015.01.0023, PP. 23-28

Keywords: 高效率视频编码,深度,二维直方图,快速模式选择,编码单元,灰度直方图

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Abstract:

针对高效率视频编码(HEVC)帧内预测高额的计算复杂度,提出一种基于二维直方图的快速深度决策算法.首先,对当前最大编码单元(LCU)采用3×3矩阵进行滤波;然后,分别统计原始LCU以及滤波后LCU的像素分布,生成二维灰度直方图.通过该二维直方图所表征的纹理特征,进行深度的自适应选择,减少不必要的深度计算.实验结果表明:同原始HM10.1相比,文中提出的算法可以节省编码时间21.6%,同时保证视频质量几乎不变.

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