压缩域视频水印的失真漂移补偿算法  

Distortion Drift Compensation Algorithm with Video Watermarking in Compressed Domain

作　　者：周悦[1] 孙锬锋[1,2] 蒋兴浩[1,2] 

机构地区：[1]上海交通大学信息安全工程学院,上海200240 [2]上海市信息安全综合管理技术研究重点实验室,上海200240

出　　处：《上海交通大学学报》2012年第4期630-635,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(60802057;61071153);上海市青年科技启明星计划项目(10QA1403700);教育部新世纪优秀人才支持计划项目(NCET-10-0569)

摘　　要：针对H.264/AVC压缩域视频,提出一种新的带有失真漂移补偿机制的鲁棒视频水印算法.该算法通过采用新的漂移补偿机制补偿由于水印嵌入所带来的解码误差,即视频播放时的失真,并针对由水印嵌入可能引起参考块改变的情况进行特殊考虑,避免了失真漂移的进一步扩散.通过选取宏块内尺寸最小的区块进行水印嵌入,利用离散余弦变换的能量集中效应保证受到攻击时的稳定性.实验结果证明,所提出的算法既具有良好的水印不可感知性,又具有良好的抗压缩攻击性,即有损压缩攻击下仍能达到平均80%的检测正确率.A drift compensation algorithm for robust H. 264/AVC video watermarking in compressed do- main was proposed. The drift compensation algorithm is adopted to reduce the visible decoding error, and the possible instances that reference blocks could be changed in the embedded process of watermarks are taken into consideration to avoid the further spread of distortion drift. The macroblocks with the least par- tition size are selected to embed watermarks and the algorithm utilizes the ＂energy compact＂ property of Discrete Cosine Transform to ensure stability under the attacks. The experiments show that this algorithm can obtain excellent imperceptibility. Drift compensation algorithm can significantly eliminate the visual in- fluence caused by watermarking. Under the high lossy compression attack, an average detection correction rate of 80% can still be obtained with the proposed algorithm.

关 键 词：H.264/AVC 视频水印 漂移补偿 运动矢量 鲁棒性水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]