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Speech recognition employing key word modeling and non-key word modeling

  • US 5,509,104 A
  • Filed: 10/06/1993
  • Issued: 04/16/1996
  • Est. Priority Date: 05/17/1989
  • Status: Expired due to Term
First Claim
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1. A method of processing an input signal representing a spoken utterance, the spoken utterance having a key utterance component and an extraneous sound component, the method comprising the steps ofcomparing the input signal to a plurality of speech recognition models within a speech recognition system, said plurality of speech recognition models including key word speech recognition models representative of respective different key utterances and further including at least a first sink model, andrecognizing a particular one of said key utterances in said spoken utterance in response to said comparing,characterized in that said sink model represents a plurality of extraneous sound training tokens, at least two of said extraneous sound training tokens being other than repetitions of a particular one vocabulary item.

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