一种基于小波域均值量化的音频水印算法

An audio watermarking algorithm based on wavelet domain quantization average

在音频文件里嵌入图像水印信息,极有可能引起音频质量的下降.首先利用Chebyshev混沌扩频原理对二值图像进行置乱,然后对音频信号进行小波变换,选取小波系数的低频部分来嵌入水印,再对小波系数进行均值量化,通过合理地确定量化步长,从而实现在音频文件中嵌入图像水印信息.实验证实,其结果具有较好的鲁棒性和不可感知性.

Inserting the image watermarking information in the audio files, has the possibility to cause the audio frequency quality drop extremely, firstly using the Chebyshev chaotic spreading principle to binary images sets transforms randomly, then carrying on the wavelet transform to the audio signal, embedding the low-frequency coefficient of watermarks and carrying on the quantification average to the wavelet coefficient, watermarking information inserting in audio file can he realized. The experimental results are good robustness and not perceptibility.