基于三维整数小波变换的视频水印算法

随着计算机和网络技术的快速发展,数字水印技术正成为一种保护数字作品知识产权的有效方法.针对数字视频的版权保护,提出一种基于三维整数小波变换的视频水印算法.利用视频场景分割将视频信号切分成不同场景,然后随机选择一场景中视频序列进行三维整数小波变换.采用对小波系数进行均值量化的方法嵌入水印信息,水印提取过程中不需要原始视频信号.该算法实现简单,可满足实时性要求.实验结果表明,该水印方案对于帧丢失、帧插入等时间域去同步攻击以及MEPG有损压缩等具有很好的鲁棒性.

A video Watermarking Algorithm Based on 3D Integer Wavelet Transform

With the fast development of computer and network techniques, digital watermarking is becoming an efficient method for protecting the intellectual property rights of digital products. For the copyright protection of digital video, a video watermarking algorithm based on 3D integer wavelet transform is proposed in this paper. The first step in this watermarking algorithm consists of breaking the video sequence into scenes. Then, 3D integer wavelet transform is performed on the video scene. The watermark is embedded in the low frequency wavelet coefficients using mean quantization. The watermark can be extracted without the original digital video signal. The proposed algorithm is simple and efficient. Experimental results show that the proposed scheme can efficiently resist MPEG lossy compression and temporal de- synchronization attacks as frame dropping, frame insertion.