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提出了一种在数字音频信号中嵌入水印新算法．该算法嵌入的水印不再是传统的伪随机序列形式，而是视觉可辨的二值图像．首先将二维的图像降维成一维的序列，然后对数字音频信号作分段离散余弦变换，最后在离散余弦变换域内通过修改数字音频信号的中频系数的方法嵌入水印．在水印嵌入过程中使用了伪随机排序技术．实验结果表明该算法对数字音频信号的滤波、压缩等操作具有很强的稳健性．
A new algorithm for embedding watermark in digital audio signal is proposed. The watermark embedded in this algorithm is no longer a traditional pseudo-random sequence, but a visually discernible binary image. Firstly, the two-dimensional image is reduced to a one-dimensional sequence, and then the digital audio signal is segmented discrete cosine transform. Finally, the watermark is embedded in the discrete cosine transform domain by modifying the IF coefficient of the digital audio signal. In the watermark embedding process using pseudo-random sorting technology. Experimental results show that the proposed algorithm has strong robustness to filtering and compressing of digital audio signal.