基于m序列的音频水印隐藏算法

该文提出基于m序列的音频信息隐藏算法,将需要隐藏的水印信息进行m序列的扩展;对数字音频信号进行分段离散小波变换,最后将经过调制的水印信号嵌入到二层小波变换的中频系数中。在接收端,利用盲检测可以精确地提取水印信号。实验仿真结果表明:算法对原始载体音频信号的影响极小,具有较好的鲁棒性和透明性。

Research for Digital Audio Watermarking Technique Based On m-Sequence

A watermarking algorithm for digital audio based on m spectrum is proposed. Using m sequence, the watermarking can be expanded. The digital audio signal is converted into segments and discrete wavelet transform is performed. Finally the modulated watermark signal is embedded in the second layer of wavelet coefficients of middle frequency range detail signal. The watermarking signal can be extracted by blind detection at the receiving end. The experimental results show that the watermark is imperceptible and the algorithm is robust to digital audio signal.