抗H.264压缩的鲁棒视频水印算法  

A video watermarking scheme robust to H.264 compression

作　　者：吴锡溪 王宏霞[1] 黄安安[1] 

机构地区：[1]西南交通大学信息科学与技术学院,成都610031

出　　处：《四川大学学报（自然科学版）》2014年第5期965-971,共7页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(61170226);成都市科技计划(12DXYB214JH-002)

摘　　要：本文提出了一种基于分块离散余弦变换(DCT)、奇异值分解(SVD)和粒子群优化算法(PSO)的鲁棒视频水印方案.在其嵌入方案中,利用DC系数和奇异值的稳定性,首先将帧内所有块的DC系数置乱,并进行4×4奇异值分解,调制第3大奇异值实现水印的嵌入,由粒子群优化算法得到合适的水印嵌入强度.实验结果表明,相对于固定的嵌入强度,采用粒子群优化算法可以在保持原有视频序列视觉质量的基础上,提高水印自身的鲁棒性.同时算法能够有效抵抗H.264压缩.A robust video watermarking algorithm based on block Discrete Cosine Transform （DCT）, Singular Value Decomposition （SVD） and Particle Swarm Optimization （PSO） is proposed in this paper. The stability of DC coefficient and singular values is utilized in the embed process. First, all the DC co- efficients in luminance blocks are scrambled, and then SVD with block size 4 × 4 of the scrambled DC co- efficients is processed. The watermarking is embedded by modulating the third singular value. The PSO is used for selecting the appropriate embedding strength. Experimental results indicate that proposed algorithm makes a good tradeoff between invisibility and robustness compared with the algorithm with fixed embedding strength. In addition, this algorithm is robust against H. 264 compression

关 键 词：视频水印 DCT变换 奇异值分解 PSO H.264 鲁棒性 

分 类 号：TN391[电子电信—物理电子学]