一种基于小波变换的音频零水印算法

作者：吴国华，吴秦寒，周晓栋 日期：2009-11-16/span> 浏览：3767 查看PDF文档

一种基于小波变换的音频零水印算法

吴国华，吴秦寒，周晓栋
（杭州电子科技大学 图形图象研究所，浙江 杭州 310018）

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。
关键词：数字水印；小波变换；零水印；鲁棒性
中图分类号：TP309文献标识码：A文章编号：1001-4551(2009)09-0016-04

An audio zerowatermarking algorithm based on DWT
WU Guohua, WU Qinhan, ZHOU Xiaodong
（Institute of Graphics and Image, Hangzhou Dianzi University, Hangzhou 310018, China）
Abstract: 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 zerowatermarking 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 mp3 compression, low pass filter, resample, add noise and so on.
Key words: digital watermarking; wavelet transform; zerowatermarking; robustness
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