基亏均值量化的小波域自同步数字音频水印算法研究

摘要

文中提出了一种基于均值量化的小波域自同步数字音频水印算法。该算法是一种盲水印算法．水印提取不需要原始音频信号的参与。算法设计中运用了均值量化的策略，音频信号小波分解后，在低频系数中隐藏水印信息；引入了同步信号的思想，利用同步信号定位水印隐藏位置。实验表明，该算法具有较强的鲁棒性、抗攻击性、抗裁剪性。%The algorithm of a self-synchronization of the wavelet-domain watermarking for digital audio based on the average quantitative is presented by the analysis of existing algorithms. This kind of algorithm is a blind detection algorithm, which introduces the idea to quantify the mean coefficient. After the wavelet decomposition of audio signal, the meaning low- frequency coefficients are quantified averagely and embedded into the watermark., the idea of embedded synchronization signals is introduced and synchronous signal is performed to locate the watermark embedded position to resist shifting, cutting and other attacks. Experimental result shows the proposed algorithm has powerful common image processing and geometric attacks.