基于伪3D-DCT域的视频零水印算法  

Video zero-watermarking algorithm based on pseudo-3D DCT domain

作　　者：黄安安[1] 王宏霞[1] 吴锡溪 

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1期53-58,共6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：基于零水印对视频信号有其自身优势,本文提出一种基于混沌映射与伪三维离散余弦变换(3D-DCT)的视频零水印算法.首先对构造零水印的视频帧分组,并进行伪3D-DCT变换.然后利用伪3D-DCT系数的符号映射生成具有稳定特性的特征值,并结合混沌映射构造零水印.最后将零水印在第三方数据库进行注册.算法不需要修改任何视频载体信息,有较好的不可见性.实验结果表明,该算法对H.264、MPEG-4压缩,噪声攻击,滤波,帧剪切等处理有很强的鲁棒性.Zero-watermarking has its own advantages for video. A video zero-watermarking algorithm based on chaotic map and pseudo-3D discrete cosine transform （DCT） is proposed. Firstly, the pseudo- 3D DCT is performed on the original video frames, which are selected to construct zero-watermarking. Secondly, combining with chaotic map, zero-watermarking is generated by the sign sequence of pseudo- 3D DCT coefficients. Then, the zero-watermarking is registered in third party database. There is no modification for the original video, so, the proposed scheme has good invisibility. Experimental results show that it is robust against several attacks, such as H. 264 compression and MPEG-4 compression, noisy attack, filtering, and frame shear.

关 键 词：视频水印 伪3D—DCT 混沌映射 零水印 鲁棒性 

分 类 号：TN391[电子电信—物理电子学]