基于混沌置乱的小波域数字音频水印算法  

A Digital Audio Watermarking Algorithm in DWT Domain Based on Logistic-map Encryption

作　　者：王庆席[1,2] 郑晓势[3] 刘广起[3] 赵彦玲[3] 李娜[3] 

机构地区：[1]山东轻工业学院信息科学与技术学院 [2]山东省计算中心,山东济南250014 [3]山东省计算中心

出　　处：《电声技术》2006年第7期35-38,共4页Audio Engineering

基　　金：山东省中青年科学家科研奖励基金(2004BS01005)

摘　　要：利用混沌动力学系统中logistic映射先对水印图像进行置乱预处理以增强其鲁棒性,在小波域中将原始音频信号按比例分段,此比例为原始音频信号低频部分与水印信号个数之比,然后将水印信号加入到音频信号的低频部分。用StirMark攻击后的实验结果表明,该算法对StirMark的部分攻击具有一定的鲁棒性。The logistic-map sequences to encrypt the watermark are used. （Discrete Wavelet Transform） domain is seperated into some pieces determined the low frequency parts and the length of the encrypted relevant pieces of the low frequency parts in the DWT The original audio signal in DWT by the ratio between the length of watermark. Every bit of the watermark is added into the domain. Experimental results show that the algorithm is robust against some StirMark attacks.

关 键 词：数字水印 音频水印 置乱加密 离散小波变换 LOGISTIC映射 

分 类 号：TN912.3[电子电信—通信与信息系统]