基于多分辨率分解的数字音频水印

Digital Audio Watermarking Based on Multi-resolution Decomposition

根据小波变换的时频分析特性和多分辨率的分析特性,提出了一种在数字音频信号中加入彩色标志图像的水印嵌入方法。该方法结合人的听觉特性,将水印和原始音频数据同时进行小波分解;将分解后的水印小波系数嵌入到原始音频信号的不同分辨率上,使水印不可感知。实验结果表明,利用该方法嵌入的彩色标志图像水印对一般的信号处理具有一定的健壮性,所提出的方法在数字音频的版权保护和身份验证方面具有较好的保密性。

A digital audio watermarking based on multiresolution decomposition is proposed.By multiresolution decomposition,the decomposed watermarks of different resolution are embedded into the corresponding resolution of the decomposed original audio,which makes the watermark be adapted to the original audio.This algorithm embeds a watermark color image into an audio.The experimental results show that not only does this algorithm make the watermark invisible,but the imbedded watermark also has the strong robust upon the geometry distortion in the space and the signal processing etc.