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SYSTEM AND METHOD FOR IMPROVING ROBUSTNESS OF SPEECH RECOGNITION USING VOCAL TRACT LENGTH NORMALIZATION CODEBOOKS

  • US 20100324893A1
  • Filed: 08/26/2010
  • Published: 12/23/2010
  • Est. Priority Date: 06/20/2007
  • Status: Active Grant
First Claim
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1. A method of performing speech recognition, the method comprising:

  • selecting a codebook, from a plurality of codebooks, indicating a vocal tract length based on an acoustic distance to a received speech, wherein the plurality of codebooks comprises codebooks for each of a plurality of speakers and is generated based on a respective vocal tract length for each of the plurality of speakers;

    normalizing the received speech based on the vocal tract length to yield a normalized received speech; and

    recognizing the normalized received speech.

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