一种基于H.264的鲁棒视频水印算法  

A video watermarking algorithm based on H.264

作　　者：王龙[1] 伍淳华[1] 袁开国[1] 马玉洁[1] 

机构地区：[1]北京邮电大学信息安全中心,北京100876

出　　处：《软件》2012年第11期181-185,共5页Software

基　　金：中央高校基本科研业务费专项资金资助(BUPT2011RC0210;BUPT2012RC0217)

摘　　要：由于H.264标准视频的流行,对数字视频水的版权保护和认证的需求在不断增加。本文提出了一种基于H.264视频编解码标准的鲁棒视频水印算法。水印经过了增加帧同步信息,扩频编码和纠错编码的预处理后有着很强的鲁棒性。在嵌入过程中,选择了残差的DCT系数与参考块像素的DCT系数和作为嵌入载体,而不是通常的残差DCT系数,该处理可以很好的提高水印算法对视频攻击,如帧率攻击和码率攻击的鲁棒性,同时在嵌入的过程中,通过应用一个针对4*4的DCT的人类视觉系统来控制嵌入强度,使得水印算法对视频的视觉质量的影响降到最小。实验结果表明:本算法对多种攻击,如分辨率攻击、帧率攻击、码率攻击和重编码都有很好的鲁棒性,同时能保持很高的视觉质量。As H.264 video becomes more prevalent, the needs for copyright protection and authentication of digital video begin to merge. This paper proposes a robust video watermarking scheme for H.264 video. A synchronization header is added to the watermark for every frame, and spread spectrum and error correct code is applied in the watermark preprocessing. During the embedding, we choose the sum of DCT coefficients of 4＊4 block residuals and the DCT coefficients of that 4＊4 block predicted pixels as carrier, instead of only choosing the residual coefficients, to improve the robustness against video attacks, such as frame rate attack or frame rate attack. We also employ a human visual model adapted for a 4＊4 DCT block to limit visual distortion. The simulation results show that we achieve high performance in resisting attacks. We demonstrate the robustness of our proposed algorithm against several different attacks.

关 键 词：数字水印 H 264 视频水印 鲁棒性 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]