用于音乐作品版权保护的数字音频水印算法

提出了一种用于音乐作品版权保护的数字音频水印嵌入算法，该算法首先将视觉可辨的二值水印图像降维成一维水印序列并进行随机置乱，再从原始数字音频信号中随机选取采样数据并进行快速傅立叶变换(FFT)，最后结合人类听觉系统(HAS)掩蔽特性选取绝对值较大的FFT系数嵌入水印信息。仿真实验表明：该数字音频水印嵌入算法不仅具有较好的透明性，而且对诸如叠加噪声、有损压缩、低通滤波、重新采样、重新量化等攻击均具有较好的鲁棒性。

A New Digital Audio Watermarking Algorithm for Copyright Protection

In this paper, a new digital audio watermarking algorithm for copyrigh t protection is presented. Firstly, the visually recognizable binary watermark i mage is converted into the one-dimensional sequence, and the sequence is permute d pseudo-randomly. Then some digital audio samples are selected randomly and dec omposed by Fast Fourier Transform. Finally, the watermarking signal is embedded into the significant FFT coefficients selected by using Human Auditory System. E xperimental results show that the proposed watermarking scheme is inaudible and robust against various signal processing such as noising adding, lossy compressi on, low pass filtering, re-sampling, and re-quantifying.