基于LDPC-OFDM技术的块均值视频水印算法

摘要

According to the similarity of video watermarking and communication system, a block-mean video watermarking algorithm based on LDPC-OFDM is proposed. Experimental results show that the proposed algorithm has only a few impacts on the quality of the video and has good invisibility. The watermark can be extracted blindly and it's robust to gaussian low-pass filter, shear attack, gaussian white noise, salt and pepper noise. Also it's robust to MPEG-2 compression and the video synchronous at-tacts such as frame deletion, frame switch, frame restructuring and frame insert. It's a new video watermarking algorithm with good performance.%根据视频水印系统和通信系统的相似性,提出一种基于LDPC-OFDM的块均值视频水印算法.实验结果表明,该算法对视频质量影响小,可以很好地保证视频质量,实现水印的盲提取,且对高斯低通滤波、剪切攻击、高斯白噪声、椒盐噪声攻击及MPEG-2压缩、视频帧同步攻击具有较强的鲁棒性,是一种性能良好的盲视频水印算法.