一种基于DWT-DCT-SVD的鲁棒性音频水印算法  

A robust audio watermarking algorithm based on DWT-DCT-SVD

作　　者：刘思玮 杜庆治[1] 龙华[1] 邵玉斌[1] 彭艺[1] LIU Siwei;DU Qingzhi;LONG Hua;SHAO Yubin;PENG Yi(College of Information Engineering and Automation,Kunming University of Science and Technology,Kunming,Yunnan 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《光电子．激光》2021年第9期1015-1022,共8页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61761025)资助项目。

摘　　要：针对在基于DWT-DCT进行数字音频水印嵌入,在已嵌入水印的音频受到噪声干扰、低通滤波、重采样等常见的攻击时,其鲁棒性差以及安全性弱的情况。提出了一种新的的盲水印嵌入算法。该算法对原始音频信号完成分帧预处理后,对每帧信号应用离散小波变换(DWT),选取三级低频分量进行离散余弦变换(DCT),先把得到的一维信号平均分解为两个片段,然后进行奇异值分解(SVD),根据奇异值的特性将水印信息嵌入到奇异矩阵。在水印图像的预处理上,采用了以Arnold变换为基础,将水印图像降维,方便水印信息的嵌入。并且通过添加密匙来提升数字音频水印的安全性。使用5个不同种类的音乐类型,进行仿真实验。实验结果表明:其误码率(BER)在0.0896以下,相关系数(NC)在0.9708以上。本算法对噪声干扰、低通滤波、重采样、重量化、剪切、压缩等常见的攻击方法具有良好的鲁棒性。For digital audio watermark embedding based on DWT-DCT,when thewatermarked audio is subjected tocommon attackssuch asnoise interference,low-pass filtering,and resampling,its robustness and security are weak.This paper proposes a new blind watermarkingembedding algorithm is proposed.After the original audio signal is preprocessed by frames,thediscrete wavelet transform(DWT)is applied to each frame,and the three-order low-frequency components are selectedfor the discrete cosine transform(DCT).The one-dimensional signal is decomposed into two segments on average,and then the singular value decomposition(SVD)is carried out,and thewatermark information is embedded into thesingular matrix accordingto the characteristics ofthe singular value.In the preprocessing of watermark image,we use Arnold transform asthe basis to reduce the dimension of watermark imageto facilitate the embedding ofwatermark information.The security of digital audio watermarkingis enhanced by adding encryption key.Use 5 different types of musicto conduct simulation experiments.Experimental results show that the bit error rate(BER)is below 0.0896,and the normalized correlation(NC)is above 0.9708.This algorithm has goodrobustness to common attack methods such as noise interference,low-pass filtering,resampling,requantization,cut,and compression.

关 键 词：数字音频水印 离散小波变换 离散余弦变换 ARNOLD变换 奇异值分解 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]