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Systems and methods for classifying audio into broad phoneme classes

  • US 7,424,427 B2
  • Filed: 10/16/2003
  • Issued: 09/09/2008
  • Est. Priority Date: 10/17/2002
  • Status: Active Grant
First Claim
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1. A method for classifying an audio signal containing speech information, the method comprising:

  • receiving the audio signal;

    classifying a sound in the audio signal as a vowel class when a first phoneme-based model determines that the sound corresponds to a sound represented by a set of phonemes that define vowels;

    classifying the sound in the audio signal as a fricative class when a second phoneme-based model determines that the sound corresponds to a sound represented by a set of phonemes that define consonants; and

    classifying the sound in the audio signal based on at least one non-phoneme based model, the at least one non-phoneme based model including at least one model for classifying the sound in the audio signal based on bandwidth.

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