Design an Aperiodic Stochastic Resonance Signal Processor for Digital Watermarking

  • Authors:

  • Shuifa Sun;Bangjun Lei;Sheng Zheng;Sam Kwong;Xuejun Zhou

  • Affiliations:

  • College of Electrical Engineering and Information Technology, China Three Gorges University, Yichang, China 443002 and Institute of Intelligent Vision and Image Information, China Three Gorges Uni ...;Institute of Intelligent Vision and Image Information, China Three Gorges University, Yichang, China 443002;College of Electrical Engineering and Information Technology, China Three Gorges University, Yichang, China 443002 and Institute of Intelligent Vision and Image Information, China Three Gorges Uni ...;Department of Computer Science, City University of Hong Kong, Kowloon, Hong Kong SAR, P.R. China;College of Electrical Engineering and Information Technology, China Three Gorges University, Yichang, China 443002

  • Venue:
  • IWDW '07 Proceedings of the 6th International Workshop on Digital Watermarking
  • Year:
  • 2008

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Abstract

In this paper, we propose an aperiodic stochastic resonance (ASR) signal processor for communication systems based on a bi-stable mechanism. This processor can detect base-band binary pulse amplitude modulation (PAM) signals. In this processor related parameters can be adjusted. The adjustment mechanism is explained from the perspective of the conventional noise-induced nonlinear signal processing. To demonstrate this processors usability, based on it we implemented a digital image watermarking algorithm in the discrete cosine transform (DCT) domain. In this algorithm, the watermark and the DCT alternating current (ac) coefficients of the image are viewed as the input signal and the channel noise, respectively. This phenomenon that the detection bit error ratio (BER) of the system suffering from certain attacks is lower than that of the system not suffering from any attack is systematically analyzed.