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Speech recognition method and system

  • US 5,640,485 A
  • Filed: 04/06/1995
  • Issued: 06/17/1997
  • Est. Priority Date: 06/05/1992
  • Status: Expired due to Term
First Claim
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1. Speech recognition apparatus, comprising:

  • word recognition means operative during a word recognition mode of operation for comparing a first word uttered by a user with a predetermined reference word and for outputting a respective first value that indicates an amount of similarity between the first word uttered by the user and a respective predetermined reference word;

    processing means having an input coupled to an output of said word recognition means for receiving a respective first value that is outputted by said word recognition means in response to said first word uttered by the user;

    memory means coupled to said processing means, said processing means being responsive for storing the respective first value in said memory means upon an occurrence of a condition such that a respective first value is less than a predetermined threshold value,said processing means determining a revised first value when a respective second value is outputted from said word recognition means in response to the user uttering a second word, the revised first value being determined from the respective second value and from the stored respective first value, said revised first value indicating an amount of similarity between the second word uttered by the user and the respective predetermined reference word that is associated with said revised first value; and

    indicator means responsive to a condition such that a respective or revised value is equal to or greater than a predetermined threshold value, for indicating that said second word uttered by the user corresponds to the respective predetermined reference word.

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