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Speech recognition method using confidence measure evaluation

  • US 6,421,640 B1
  • Filed: 09/13/1999
  • Issued: 07/16/2002
  • Est. Priority Date: 09/16/1998
  • Status: Expired due to Term
First Claim
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1. A method of automatically recognizing speech utterances, the method comprising the steps of:

  • evaluating a recognition result using an initial confidence measure and a plurality of second confidence measures determined for a recognition result, determining a resulting confidence measure by combining the initial confidence measure and the plurality of second confidence measures, wherein the determining step includes, determining parameters for the combining of the second confidence measures using a minimization of a cross-entropy-error measure.

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