Digital watermarking based on stochastic resonance signal processor

Shuifa SUN, Sam KWONG, Bangjun LEI, Sheng ZHENG

Research output: Book Chapters | Papers in Conference ProceedingsConference paper (refereed)Researchpeer-review

3 Citations (Scopus)


A signal processor based on an bi-stable aperiodic stochastic resonance (ASR) is introduced firstly. The processor can detect the base-band binary pulse amplitude modulation (PAM) signal. A digital image watermarking algorithm in the discrete cosine transform (DCT) domain is implemented based on the processor. 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 of the processor input, respectively. In conventional watermarking systems, it's difficult to explain why the detection bit error ratio (BER) of a watermarking system suffering from some kinds of attacks is lower than that of the system suffering from no attack. In the present watermarking algorithm, this phenomenon is systematically analyzed. It is shown that the DCT ac coefficients of the image as well as the noise imported by the attacks will cooperate within the bi-stable ASR system to improve the performance of the watermark detection. © Springer-Verlag Berlin Heidelberg 2007.
Original languageEnglish
Title of host publicationAdvances in Multimedia Information Processing: PCM 2007: 8th Pacific Rim Conference on Multimedia Hong Kong, China, December 11-14, 2007 Proceedings
PublisherSpringer Berlin Heidelberg
Number of pages10
ISBN (Electronic)9783540772552
ISBN (Print)9783540772545
Publication statusPublished - 2007
Externally publishedYes
Event8th Pacific-Rim Conference on Multimedia - City University of Hong Kong, Hong Kong
Duration: 11 Dec 200714 Dec 2007


Conference8th Pacific-Rim Conference on Multimedia
Abbreviated titlePCM 2007
Country/TerritoryHong Kong


  • Digital watermarking
  • Signal processing
  • Stochastic resonance


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