一种新的混合域数字音频水印算法
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摘要
为了提高多媒体信息安全,保护音频作品版权,利用同步码技术、离散小波变换和经验模态分解,提出了一种可以有效抵抗各种攻击的混合域数字音频水印算法。为准确定位隐藏水印信息,利用了同步码技术,达到了抵抗剪切、移位攻击的目的。针对音频信号非线性、非平稳的特点,采用了具有良好时频分析特性的小波变换。另外,考虑到小波变换局部分析能力较弱以及选择不同小波基函数会造成差异等因素,提出了较为新颖的经验模态分解方法,以自适应地处理音频信号。仿真实验表明,该算法能有效抵抗各种音频信号攻击手段,具有良好的鲁棒性和不可感知性。
To improve the security of multimedia information, protect the copyright of audio works, a mixed-domain digital audio watermarking technology which can resist various attacks effectively is proposed by using synchronization code, discrete wavelet transform(DWT) and empirical mode decomposition(EMD). To locate the hidden watermark accurately, synchronization code is used to resist cropping and shifting attacks. Wavelet transform is used in nonlinear and nonstationary audio signal for its well time-frequency analysis features. But it has weak partial analysis ability and selecting different wavelet basis functions may produce different results. Considering the above factors, empirical mode decomposition is presented. It is a novel method for processing audio signals adaptively. Experimental results show that the proposed scheme is inaudible and robust against various attacks.
To improve the security of multimedia information, protect the copyright of audio works, a mixed-domain digital audio watermarking technology which can resist various attacks effectively is proposed by using synchronization code, discrete wavelet transform(DWT) and empirical mode decomposition(EMD). To locate the hidden watermark accurately, synchronization code is used to resist cropping and shifting attacks. Wavelet transform is used in nonlinear and nonstationary audio signal for its well time-frequency analysis features. But it has weak partial analysis ability and selecting different wavelet basis functions may produce different results. Considering the above factors, empirical mode decomposition is presented. It is a novel method for processing audio signals adaptively. Experimental results show that the proposed scheme is inaudible and robust against various attacks.
引文
[1]H.Y.Yang,D.W.Bao,X.Y.Wang,P.P.Niu.A robust content based audio watermarking using UDWT and invariant histogram[J].Multimedia Tools and Applications,2010.
[2]施荣华,潘登,刘卫国,等.一种基于改进的分段DCT域多格式音频水印算法[J].计算机应用研究,2013,12:3779-3782.
[3]Xiang.Y,Natgunanathan.I,Guo.S,et al.Patchwork-based audio watermarking method robust to de-synchron-ization attacks[J].IEEE/ACM Transac-tions on Audio,Speech and Language Processing,2014,22(9),1413-1423.
[4]Pun.C.M,Yuan.X.C,Robust segments detector for de-synchronization resilient audio watermarking[J].IEEE Trans.on Audio,Speech and Language Processing,2013,21(11),2412-2424.
[5]Kais Khaldi,Abdel-Ouahab Boudraa.Audio Watermar king Via EMD[J].IEEE Transactions on Audio Speech and Language Processing,2013,21(3):675-680.
[6]刘瑞远.基于NSST和直方图的音频水印算法[J].微型电脑应用,2015.
[2]施荣华,潘登,刘卫国,等.一种基于改进的分段DCT域多格式音频水印算法[J].计算机应用研究,2013,12:3779-3782.
[3]Xiang.Y,Natgunanathan.I,Guo.S,et al.Patchwork-based audio watermarking method robust to de-synchron-ization attacks[J].IEEE/ACM Transac-tions on Audio,Speech and Language Processing,2014,22(9),1413-1423.
[4]Pun.C.M,Yuan.X.C,Robust segments detector for de-synchronization resilient audio watermarking[J].IEEE Trans.on Audio,Speech and Language Processing,2013,21(11),2412-2424.
[5]Kais Khaldi,Abdel-Ouahab Boudraa.Audio Watermar king Via EMD[J].IEEE Transactions on Audio Speech and Language Processing,2013,21(3):675-680.
[6]刘瑞远.基于NSST和直方图的音频水印算法[J].微型电脑应用,2015.