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Method and system for on-line unsupervised adaptation in speaker verification

  • US 6,804,647 B1
  • Filed: 03/13/2001
  • Issued: 10/12/2004
  • Est. Priority Date: 03/13/2001
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • verifying the identity of a speaker during a speaker verification session based on a speaker model, including generating a confidence score representing a degree of confidence that the speaker is who the speaker claims to be;

    determining whether a communication channel user by the speaker during the speaker verification session matches a base channel that was previously used by the speaker to enroll the speaker for speaker verification;

    if the communication channel matches the base channel, then automatically updating the speaker model for use during subsequent speaker verification, based on vocal characteristics of the speaker on the communication channel; and

    if the communication channel does not match the base channel, then automatically updating the speaker model for use during subsequent speaker verification by transforming the speaker model between channels, based on vocal characteristics of the speaker on the communication channel;

    wherein said automatically updating the speaker model comprises updating the speaker model by a degree of aggressiveness that is based on the confidence score.

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