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Apparatus and methods for speech recognition including individual or speaker class dependent decoding history caches for fast word acceptance or rejection

  • US 5,937,383 A
  • Filed: 06/04/1997
  • Issued: 08/10/1999
  • Est. Priority Date: 02/02/1996
  • Status: Expired due to Fees
First Claim
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1. A method for performing speech recognition on speech segments frequently input by a user, the method comprising the steps of:

  • (a) inputting at least one keyword spoken by the user;

    (b) decoding the at least one keyword by scoring the at least one keyword against a speech recognition vocabulary to generate a decoded keyword and at least one score for the decoded keyword;

    (c) storing the decoded keyword and the at least one score;

    (d) inputting a speech segment spoken by the user;

    (e) comparing the input speech segment to the decoded keyword in order to generate a temporary score; and

    (f) comparing the temporary score against the at least one stored score and if the temporary score is one of within a predetermined margin of, equivalent to, and larger than the at least one stored score, then the decoded keyword is output as being representative of the input speech segment, else the input speech segment is scored against the speech recognition vocabulary to generate a second decoded keyword and at least one score for the second decoded keyword.

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