一种基于SVD的DCT域音频水印算法  

Audio Watermarking Algorithm Based on SVD in DCT Domain

作　　者：暴晋飞[1] 柏森[1] 尤春艳[1] 柏玉保[1] 

机构地区：[1]重庆通信学院,重庆400035

出　　处：《重庆理工大学学报（自然科学）》2010年第8期91-96,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市自然科学基金资助项目(CSTC;2008BB2296)

摘　　要：提出了一种基于SVD的音频水印算法。对载体音频进行分段DCT变换,根据人耳听觉的频率掩蔽效应,选择出人耳听觉容差最大的DC直流系数。利用奇异特征值良好的稳定性,通过改变SVD奇异特征来值嵌入水印。实验结果表明,嵌入水印后的音频文件不仅具有良好的不可感知性,而且对诸如加噪、低通滤波、重采样、回声和Mp3压缩等具有很强的鲁棒性,算法的鲁棒性和不可感知性达到了平衡。A novel audio waterrmarking algorithm based on SVD is proposed.First the host audio is divided into several segments which are simultaneously converted to DCT domain,then the DC coefficients which is insensitivity to the human ear hearing and has the biggest hearing margin are selected.Based on the stability of SVD,the watermark is embedded by changing SVD.Experimental results show that the watermarked audio has good imperceptibility and is robust against different kinds of attacks,such as noise adding,low-pass filtering,re-sampling,echo and Mp3 compression.The robustness and the imperceptibility of watermarked audio reach a good balance.

关 键 词：音频水印 DCT SVD 鲁棒性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]