基于纹理特征的H.264/AVC顽健视频水印算法

在分析现有视频水印算法的基础上,结合H.264压缩编码标准的特性,提出了一种新的基于纹理特征的视频顽健水印算法。算法先对当前帧4×4块进行整数离散余弦变换,判断其是否是纹理块,再采用能量差的方式自适应选择系数嵌入水印。实验结果表明,该算法对视频质量和码率的影响较小,并且能有效抵抗高斯噪声、低通滤波、重编码等常见的视频水印攻击。

Robust video watermarking algorithm for H.264/AVC based on texture feature

On the basis of analyzing some existing video watermarking algorithms and combining with the new features of the H.264/AVC video coding standard,a new robust video watermarking algorithm based on texture feature was pro-posed.The proposed algorithm firstly performs the 4×4 integer discrete cosine transform on the current frame in purpose of identifying whether it is the texture block.Then the watermarking is embedded by adopting the way of differential en-ergy for selecting the appropriate coefficients adaptively.The experimental result shows that the proposed algorithm has little impact on the video quality and bit-rate,moreover,its robustness can effectively resist the common attacks such as the gauss noise,low pass filter and re-coded performed on the video watermarking.