基于混沌和运动矢量的视频水印算法

针对新一代视频压缩标准H.264,提出一种基于混沌置乱以及运动矢量域的视频水印方案.该方案在运动矢量域自适应嵌入水印和提取经过混沌置乱的水印信息,再经过置乱逆变换恢复得到原水印信息.混沌序列的伪随机性和初值敏感性为水印的安全性提供了保证.实验结果表明,主客观视频质量都与原始视频序列相当,码率误差小.

Video watermarking algorithm based on chaos and motion vector

Focusing on the latest video compression standard H.264,this paper proposed a scheme of video watermarking based on the chaotic scrambling and the motion vector field. In this scheme, watermarking was embedded and watermarking information was extracted adaptively with chaotic scrambling transformation in the motion vector field.It recovered the original watermarking information by taking the scrambling inverse transformation. Pseudo-randomness and initial value sensitivity of the chaotic sequence provided a guarantee for the safety of the watermarking. The results indicate that the subjective and objective video qualities are both equivalent with the original video sequence, and the error bit rate is small.