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Signal verification device

  • US 6,317,507 B1
  • Filed: 05/26/1999
  • Issued: 11/13/2001
  • Est. Priority Date: 05/30/1998
  • Status: Expired due to Fees
First Claim
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1. A device for the verification of time-dependent, user-specific signals which includesmeans for generating a set (O′

  • ) of feature vectors (ot

    ) which serve to provide an approximative description of an input signal and are associated with selectable sampling intervals of the signal;

    means for preparing an HMM model (λ

    ) for the signal;

    means for determining a probability value which describes the probability of occurrence of the set (O′

    ) of feature vectors (ot

    ), given the HMM model (λ

    ), and a threshold decider for comparing the probability value with a threshold value (τ

    ) and for deciding on the verification of the signal, characterized in that means (10) are provided for the automatic, person-specific evaluation of the relevance of the features collected in the feature vectors by means of an LDA transformation, and for the automatic selection of features evaluated as relevant.

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