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System for using silence in speech recognition

  • US 6,374,219 B1
  • Filed: 02/20/1998
  • Issued: 04/16/2002
  • Est. Priority Date: 09/19/1997
  • Status: Expired due to Term
First Claim
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1. A method of recognizing speech based on an input data stream indicative of the speech, the method comprising:

  • providing possible words represented by the input data stream, and formed of phonemes, as a prefix tree including a plurality of phoneme branches connected at nodes, each phoneme branch corresponding to a phoneme, the plurality of phoneme branches being bracketed by at least one input silence branch corresponding to a silence phone on an input side of the prefix tree and at least one output silence branch corresponding to a silence phone on an output side of the prefix tree; and

    traversing the prefix tree to obtain a word that is likely represented by the input data stream.

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