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《Journal of Dalian University of Technology》 2007-05
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A digital audio watermarking scheme based on blind source separation and mask effect of human auditory system

MA Xiao-hong,WANG Chong,YIN Fu-liang(School of Electr.and Inf.Eng.,Dalian Univ.of Technol.,Dalian 116024,China)  
The blind source separation technology is applied to the digital audio watermarking scheme to extract the embedding watermark signal from the watermarked audio signal in the case of the host signal unknown.By taking the initial value of the chaotic sequence,the mask signals in the time and frequency domains of the host signal as the secret keys to produce the embedding watermark signal,the security in the watermark detection part can be ensured.The embedding watermark signal is adaptive to the host signal by using the mask effect of human auditory system(HAS),which can improve the robustness of the proposed method.Experimental results show that there is no audible distortion between the original audio signal and the watermarked audio signal.And through general signal processing operations such as low-pass filtering,re-sampling,adding noise,cropping and mp3 compression,the correlation value between the embedding watermark signal and the separated watermark signal possesses obvious characteristics of two-value distribution than that without masking operations.In particular,the exact synchronization can be implemented without embedding additional synchronous information into original audio signal.
【Fund】: 国家自然科学基金资助项目(60575011 60372082);; 辽宁省自然科学基金资助项目(20052181)
【CateGory Index】: TN911;TP309
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