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-  2015 

一种改进的H.264视频防失真漂移隐写算法 An Improved H.264 Video Steganographic Algorithm Against the Drift Distortion

Keywords: H.264/AVC,失真漂移,帧内预测,耦合系数对

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Abstract:

数字视频中量化后的残差DCT(离散余弦变换)系数常用来作为隐写嵌入的位置,而直接在DCT域上隐写会导致视频帧出现失真漂移现象,使视频质量受到严重破坏.本文在已有文献的基础上,针对H.264/AVC视频,研究了基于纹理特征的帧内8×8亮度块上的隐写模型,将8×8块和4×4块上的隐写模型相结合,提出了一种改进的H.264视频防失真漂移隐写算法.与已有文献中的隐写算法相比,本文提出的隐写算法在PSNR平均仅降低1.94dB的情况下,隐藏容量平均提升30%

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