Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (9): 59-63.

• Computer Science & Technology • Previous Articles     Next Articles

An Adaptive Synchronous Audio Watermarking Algorithm

Shi Hua-ji1  Tang Hui2  Zheng Hong-yuan1  Li Xing-yi2  Ding Qiu-lin1   

  1.  1. Computer Application Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. School of Computer Science and Telecommunications Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
  • Received:2007-08-02 Revised:2007-09-30 Online:2008-09-25 Published:2008-09-25
  • Contact: 施化吉（1964-），男，博士生，江苏大学教授，主要从事信息安全、多媒体信号处理与数字音频水印、分布计算与分布数据处理研究． E-mail:hjshi@ujs．edu．cn
  • About author:施化吉（1964-），男，博士生，江苏大学教授，主要从事信息安全、多媒体信号处理与数字音频水印、分布计算与分布数据处理研究．
  • Supported by:

    国家“863”计划项目（2003AA414031）;国家火炬计划项目（2004EB330006）;江苏省高校自然科学指导性计划项目（05JKD520050）

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Abstract:

In order to overcome the shortcomings of Garcia＇s watermarking algorithm, an improved adaptive synchronous audio watermarking algorithm is proposed. In this algorithm, both the psychoacoustic model and the auditory masking threshold are used to determine the embedding positions of watermarking for the purpose of ensuring the imperceptibility of watermarking, the synchronization code is embedded in the audio signal in time domain to withstand synchronous attacks, and the audio signal is segmented and the watermarking is self-adaptively embedded in each segment. Moreover, a sequence number is embedded in the front of each segment to discriminate different segments. Experimental results show that the proposed algorithm is robust against synchronous attacks and effective in processing common audio signals, and that it obviously improves the imperceptibility of watermarking.

Key words: digital watermarking, audio watermarking, psychoacoustic model, auditory masking threshold, desynchronization attack