Fast, language-independent method for user authentication by voice

  • US 8,645,137 B2
  • Filed: 06/11/2007
  • Issued: 02/04/2014
  • Est. Priority Date: 03/16/2000
  • Status: Expired due to Fees
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First Claim
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1. A method of speech-based user authentication, comprising:

  • at a device comprising one or more processors and memory;

    receiving a spoken utterance of a speaker;

    generating a phoneme-independent matrix based on the spoken utterance, wherein the phoneme-independent matrix comprises a plurality of phoneme-independent feature vectors each having been extracted from a respective frame sampled from the spoken utterance at a sampling frequency;

    decomposing the phoneme-independent matrix into multiple sets of vectors including at least a first set of vectors defining at least one speaker-specific recognition unit and a second set of vectors defining at least one content reference sequence;

    computing at least one speaker-specific distribution value based on at least the speaker-specific recognition unit; and

    authenticating an input speech signal based on the at least one speaker-specific distribution value.

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