Detection-theoretic analysis of warping attacks in spread-spectrum watermarking

Alexia Briassouli, Pierre Moulin

Research output: Contribution to journalConference article

Abstract

This paper studies the effects of desynchronization attacks such as delay and warping on the performance of blind spread-spectrum watermark detection systems. The host signal is modeled as a colored Gaussian signal. Evaluation of the optimal likelihood ratio test is often computationally expensive, so as a practical alternative, we propose a family of quadratic detectors and construct the detector and family of watermarks that maximize the deflection criterion. Experiments are carried out to verify the suitability of the deflection as a performance index. Substantial improvements over conventional watermark designs are demonstrated.

Original languageEnglish (US)
Pages (from-to)53-56
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume3
StatePublished - Sep 25 2003
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: Apr 6 2003Apr 10 2003

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Watermarking
Detectors
Experiments

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

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AB - This paper studies the effects of desynchronization attacks such as delay and warping on the performance of blind spread-spectrum watermark detection systems. The host signal is modeled as a colored Gaussian signal. Evaluation of the optimal likelihood ratio test is often computationally expensive, so as a practical alternative, we propose a family of quadratic detectors and construct the detector and family of watermarks that maximize the deflection criterion. Experiments are carried out to verify the suitability of the deflection as a performance index. Substantial improvements over conventional watermark designs are demonstrated.

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