一种抗高性能压缩编码的数字视频零水印新法  

A New Digital Video Zero-Watermarking Algorithm Against H.264 Compression

作　　者：周支元[1] 杨高波[2] 周天亮[1] 张筱 

机构地区：[1]怀化医学高等专科学校,湖南怀化418000 [2]湖南大学计算机与通信学院,湖南长沙410083 [3]南京中兴软创长沙研发中心,湖南长沙410013

出　　处：《计算机仿真》2011年第5期267-270,共4页Computer Simulation

基　　金：国家自然科学基金(60702065);湖南省教育厅科技计划项目(09C041)

摘　　要：传统的数字水印技术在视频中嵌入水印信息会导致视频图像的失真,且视频受到各种攻击后难以提取出水印,尤其不能抵抗高性能压缩编码,使图像失真。为解决上述问题,提出了一种抗高压缩编码的零水印算法。先计算相邻两帧图片的欧氏距离差,然后调用极值函数选定关键帧,最后利用小波变换系数关系构造密钥。过程中不修改原始视频信号。仿真试验表明,水印算法能有效抵抗各种常见攻击,尤其能抵抗如MPEG、H.264高性能压缩编码处理。对保护视频版权有一定的指导意义。Traditional digital watermarking techniques embedding the watermark into image would lead to a certain degree of distortion in video images,and it is difficult to extract watermark from attacked images,especially cannot resist the compression of H.264 with high performance.To solve the problems,an algorithm with high resistance to compression has been put forward.Through this method,the Euclidean Distance between two frames of images next to each other is worked out and then the extremal function is used to select the key frame and at last we can make secret key through changing the algorithm of watermarking based on strong relationship of DWT.And it does not change the original video signals.In simulation tests,the watermarks algorithms can effectively combat all kinds of common attacks and especially can resist the compression modes of H.264 and MPEG.It is significant to protect video copyright.

关 键 词：欧氏距离 零水印 视频水印 高压缩 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]