摘要
研究版权保护优化数字水印设计,结合TD-ERCS混沌系统良好的安全特质和奇异值分解(SVD)抗几何攻击的优点,提出了一种改进的采用混沌置乱的SVD数字视频水印算法。首先利用TD-ERCS离散混沌系统产生的二维混沌序列对水印进行置乱,在视频帧的亮度分量上选择嵌入区域,然后对所选区域进行分块并作离散小波变化,对低频部分进行奇异值分解,最后通过修改分块的最大奇异值嵌入水印信息。实验结果表明,改进算法具有良好的性能,提取水印时不需要原始视频序列,具有盲检测性,而且对常见攻击具有较好的鲁棒性。
Combined the safe characteristic of the TD - ERCS chaotic system with the anti - geometric of the sin- gular value decomposition（ SVD ）, a new digital video watermarking method based on chaotic scrambling and SVD was proposed. Firstly, the embeded region in the luminance component of the video frame was selected with the help of 2 - dimensional chaotic sequence of watermark scrambling produced by TD - ERCS discrete chaotic system. Sec- ondly, the selected region was made into sub- blocks to make discrete wavelet transform and SVD was maed in the low -frequency parts. Finally, by modifying the largest singular value the watermark information was embeded. The experimental results indicate that the algorithm can provide satisfied performances, the watermark can be taken out without the original video sequence, and it also has blind detectability as well as preferable robustness to the common attacks.
出处
《计算机仿真》
CSCD
北大核心
2013年第4期406-410,共5页
Computer Simulation
关键词
视频水印
混沌置乱
奇异值分解
盲检测
Video watermarking
Chaotic scrambling
Singular value decomposition （SVD）
Blind detection
