×

Speech recognition apparatus and method

  • US 4,783,803 A
  • Filed: 11/12/1985
  • Issued: 11/08/1988
  • Est. Priority Date: 11/12/1985
  • Status: Expired due to Fees
First Claim
Patent Images

1. A speech recognition system for recognizing a word corresponding to a given utterance spoken after one or more preceding words, said system comprising:

  • means for storing an acoustic model of a given word;

    means for making a word match score corresponding to the probability that said given word corresponds to acoustic data generated by said utterance, including means for making successive partial comparisons between said acoustic model and said acoustic data and for successively updating said word match score after each such partial comparison;

    context storing means for storing a language context derived from one or more words spoken prior to said given utterance;

    language score introducing means, including means for generating a language score for said given word corresponding to a language model probability estimate of the probability that said given word would occur given the language context stored in said context storing means and means for separately altering said word match score after each of a plurality of said partial comparisons by an amount corresponding to said language score; and

    means for stopping said means for making a word match score from making further partial comparisons between said acoustic model of a given word and said acoustic data when the word match score for that given word is worse than a given threshold.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×