基于率失真优化的HEVC帧内编码模式选择An HEVC intraframe coding mode selection based on RDO
乔莉,李博,刘伟杰
摘要(Abstract)：
针对高压缩率的视频编码算法产生的视频失真,引起视频感知效果下降的问题,提出一种基于率失真优化(RDO)的HEVC编码模式选择。HEVC的帧内预测模式采用基于块的多方向帧内预测方式,具有高达35种预测模式的帧内预测算法。在此使用率失真优化方法在众多的编码模式中选择出一种最优的模式,使得编码失真最小且编码输出码率最低。实验结果表明,基于率失真优化的HEVC帧内编码模式选择可以降低38.76%的编码复杂度,比特率增加0.834%,峰值信噪比(PSNR)下降0.043 d B。
关键词(KeyWords)： HEVC;帧内编码模式选择;拉格朗日代价;率失真优化;最优模式;编码复杂度
基金项目(Foundation): 国家自然科学基金项目(61471325)~~
作者(Author): 乔莉,李博,刘伟杰
DOI: 10.16652/j.issn.1004-373x.2018.12.022
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