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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  0, Vol. 6 Issue (100): 53-57    DOI: 10.1631/jzus.2005.AS0053
Computer & Information Science     
Adaptive audio watermarking based on SNR in localized regions
WU Guo-min, ZHUANG Yue-ting, WU Fei, PAN Yun-he
School of Computer Science, Zhejiang University, Hangzhou 310027, China
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Abstract  In this paper, a novel localized audio watermarking scheme based on signal to noise ratio (SNR) to determine a scaling parameter a is proposed. The basic idea is to embed watermark in selected high inflexion regions, and the intensity of embedded watermarks are modified by adaptively adjusting a. As these high inflexion local regions usually correspond to music edges like sound of percussion instruments, explosion or transition of mixed music, which represent the music rhythm or tempo and are very important to human auditory perception, the embedded watermark is especially expected to escape the distortions caused by time domain synchronization attacks. Taking advantage of localization and SNR, the method shows strong robustness against common problems in audio signal processing, random cropping, time scale modification, etc.

Key words： Copyright protection      Audio watermarking      Time scale modification      MDCT     
Received: 12 November 2004     
CLC:  TP309.7  
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WU Guo-min, ZHUANG Yue-ting, WU Fei, PAN Yun-he. Adaptive audio watermarking based on SNR in localized regions. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 0, 6(100): 53-57.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.AS0053     OR     http://www.zjujournals.com/xueshu/zjus-a/Y0/V6/I100/53

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[1] WU Guo-min, ZHUANG Yue-ting, WU Fei, PAN Yun-he. Adaptive audio watermarking based on SNR in localized regions[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6(Supplement1): 53-57.