小波变换域互补鲁棒性视频多水印算法

数字水印是解决数字视频版权保护问题的一种有效技术手段.为了能同时抵抗几何攻击和时间域去同步攻击,本文提出了一种新的互补视频水印方案.根据视频序列的特点,沿时间轴嵌入第一个鲁棒水印,用以抵抗各种几何攻击;第二个鲁棒水印是借助静止图像水印技术在每一帧中嵌入,用以抵抗时间域去同步攻击.整个水印系统能互补地抵抗各种攻击形式,从而增强了算法的整体鲁棒性.水印的提取不需要原始视频信号.实验结果表明,该水印算法对帧丢失、帧插入等时间域去同步攻击以及几何攻击具有良好的鲁棒性.

Multiple video watermarking algorithm with complementary robustness in wavelet transform domain

Digital watermarking is an efficient method to protect the video copyright. A novel complementary video watermarking algorithm that can resist the spatio-temporal de-synchronization attacks simultaneously was presented in this paper. The first watermark information against geometric distortion was embedded into pixels along the temporal axis. The second watermark information against temporal de-synchronization attacks was embedded in each frame by using still image watermarking technique. Thus, to any attack class, at least one watermark can survive. Two watermarks can be extracted independently without the original digital video signal. Experimental results show that the complementary watermarking algorithm is robust against temporal de-synchronization attacks as frame dropping, frame insertion and geometric attacks.