抗时间同步攻击的鲁棒视频水印算法优化研究  

Optimization of Robust Video Watermarking Algorithms Against Time Synchronization Attacks

作　　者：赵亚宁 严利民[1] ZHAO Ya-ning;YAN Li-min(Microelectronics Research and Development Center,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学微电子研究与开发中心,上海200444

出　　处：《计算机仿真》2025年第2期259-262,292,共5页Computer Simulation

摘　　要：为最大限度抵抗时间同步攻击下帧置换、帧删除给视频内容带来的冲击,保证视频完整性与真实性,提出一种抗时间同步攻击的鲁棒视频水印算法优化策略。求解当前帧的帧间差分图像,更新视频背景信息,采用饱和度与亮度两个分量分割阴影与背景,获得视频连续帧运动特征;通过Arnold置乱让图像数据分布呈散乱形态,使用二阶Hadamard矩阵对混合编码采取正交变换,完成水印信号预处理;计算图像嵌入强度,运用帧离散余弦变换嵌入视频水印,令水印子矩阵和视频帧的亮度分量相互对应,引入结构张量选块机制,优化视频水印不可见性与鲁棒性,利用水印预处理逆向运算实现水印提取。实验结果表明,所提算法针对时间同步攻击具备极强的鲁棒性,提高了视频应用安全,可靠性较强。To maximize the resistance to the impact of frame replacement and frame deletion on video content under time synchronization attacks,and ensure video integrity and authenticity,a robust video watermarking algorithm optimization strategy is proposed to resist time synchronization attacks.At first,we solved the inter-frame differential image of the current frame,and update the background information of video.Then,we used saturation and brightness components to separate shadows from background,and thus to obtain continuous frame motion features of the video.Moreover,we used Arnold scrambling to make the image data distributing in a scattered form.Meanwhile,we used a second-order Hadamard matrix to perform orthogonal transformation on the mixed encoding,thus preprocessing watermark signals.Furthermore,we calculated the embedding strength of image,and embedded the video watermark by frame discrete cosine transform,so that the watermark submatrix could correspond to the brightness components of video frame.Finally,we introduced the structural tensor block selection mechanism to optimize the invisibility and robustness of video watermark,and used the watermark preprocessing reverse operation to achieve the watermark extraction.The experimental results show that the proposed algorithm has strong robustness against time synchronization attack and high reliability,and improves video application security.

关 键 词：时间同步攻击 视频水印 特征提取 鲁棒性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]