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Normed centre of gravity based blind adaptively quantized audio watermarking algorithm


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Normed centre of gravity based blind adaptively quantized audio watermarking algorithm
Cui Delong12Gong Yunfeng1Yu Guilan1
1.College of Computer and Electronic Information,Guangdong University of Petrochemical Technology, Maoming 525000,China; 2.Guangdong Provincial Key Laboratory of Fault Diagnosis of Petrochemical Equipment,Maoming 525000,China
audio watermarking robustness watermarking normed centre of gravity discrete cosine transform adaptive watermarking blind watermarking original audio signals
In view of the low-level steady statistics of audio signal and uncorrelated property of discrete cosine transform(DCT),an adaptively quantized audio blind watermarking algorithm based on normed centre of gravity(NCG)is proposed here to achieve the copyright protection of digital audio.The original audio signal is framed by equalized length.The coordinates of NCGs are detected from the framed audio,and the watermark is embedded into the region which includes the NCGs.The adaptively quantized watermarking information is embedded in the low frequent coefficients of DCT domain.Experimental results show that the scheme has robustness and effectiveness and the algorithm security is guaranteed by using secret keys.


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Last Update: 2015-02-28