基于DWT和DCT的自适应双重音频水印  

Adaptive dual audio watermarking based on DWT and DCT

作　　者：任克强[1] 李慧[1] 谢斌[1] 

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《计算机应用研究》2013年第7期2120-2123,共4页Application Research of Computers

基　　金：江西省教育厅青年科学基金资助项目(GJJ11132)

摘　　要：针对数字音频版权保护和内容认证的问题,提出了一种用于版权保护和内容认证的自适应双重音频水印算法。算法对每段原始音频信号进行离散小波变换和离散余弦变换,分别提取混合变换域的低频系数和中低频系数作为水印的构造和嵌入域,利用音频载体的统计特性自适应地构造零水印和嵌入半脆弱水印,实现音频版权保护和内容认证。实验结果表明,该算法的不可感知性很好,在抵抗多种攻击时具有良好的鲁棒性,并且能够对恶意窜改进行定位。Aiming at the problem of digital audio copyright protection and content authentication,this article proposed an adaptive dual audio watermarking algorithm for copyright protection and content authentication.The algorithm carried on DWT and DCT for each segment of original audio signal.It extracted low frequency coefficients and middle-low frequency coefficients in hybrid transform domain respectively as watermarking structure and embedding domain,structured zero-watermarking and embedded semi-fragile watermarking adaptively,and realized audio copyright protection and content authentication.The experimental results show that the imperceptibility of the algorithm is very good,it has good robustness against many kinds of attacks,and it is able to locate the malicious tampering.

关 键 词：双重音频水印 零水印 半脆弱水印 自适应量化 窜改定位 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]