摘要
针对目前音频水印算法中存在不可听见性和鲁棒性矛盾的问题,提出了一种基于小波变换的数字音频零水印算法,该算法利用音频的重要特征来构造水印信息。首先对数字音频信号进行3层小波变换,然后利用音频段中的小波系数并采用均值量化方法构造零水印。实验结果表明水印具有不可听见性,经过mp3压缩、低通滤波、重采样、噪声干扰等水印攻击后,水印系统仍然具有强的鲁棒性。
Aiming at the problem that the contradiction between inaudible and robustness of audio watermarking, an audio algorithm scheme based on wavelet transform was presented, using the important information of digital audio to construct watermarking. Firsly, the digital audio signal was divided into several segments and wavelet transform was performed, then with method of average interpolation zero-watermarking was constructed by the approximation coefficients of audio signal. The experiment results show that the watermark is inaudible, and the watermarking system is robust against some attacks, such as rap3 compression, low pass filter, resample, add noise and so on.
出处
《机电工程》
CAS
2009年第9期16-19,共4页
Journal of Mechanical & Electrical Engineering
关键词
数字水印
小波变换
零水印
鲁棒性
digital watermarking
wavelet transform
zero-watermarking
robustness
