线性预测编码的DWT域鲁棒性视频水印研究

Research on Robustness of Video Watermarking Scheme in the Wavelet Domain with a Linear Predictive

针对提高视频水印的安全性问题,本文结合DWT三层小波分解,提出一种线性预测编码技术的DWT域鲁棒性视频水印的研究。算法首先对视频进行分帧处理,采用线性预测编码技术对视频进行压缩;然后对每一帧的视频进行2D-DWT[1]三层小波分解;通过优化算法找出最优的四个比例,将水印按此比例容量嵌入到三层分解的系数。实验结果表明,该方法可提高嵌入视频水印安全性、鲁棒性。

Aiming at problems in video watermark security, combined with DWT three wavelet decomposition, the paper proposes a study on a linear predictive coding technique and DWT robustness video watermarking.Firstly, the video division frame processing and video compression by using linear predictive coding technique;then 2D-DWT [1] three wavelet decomposition for each frame; and finally calculating four optimal rations by optimizing algorithms, and embedding the watermark according to this scale capacity to three decomposition coefficients. Experimental results show that this method improves video watermark embedding security and robustness.