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Training speaker-dependent, phrase-based speech grammars using an unsupervised automated technique

  • US 7,778,830 B2
  • Filed: 05/19/2004
  • Issued: 08/17/2010
  • Est. Priority Date: 05/19/2004
  • Status: Expired due to Fees
First Claim
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1. A computer-implemented method for performing speech recognition, the method comprising:

  • operating at least one processor programmed to perform;

    initiating a communication session with a speaker, the communication session requiring automatic speech recognition (ASR);

    determining a characteristic of the speaker, the characteristic selected from a group consisting of a speaker identity and at least one voice characteristic for the speaker;

    identifying a speaker-dependent, phrase-based grammar to use in the communication session with the speaker, wherein different speaker-dependent, phrase-based grammars are used for different users based on at least one speaker-dependent feature independent of a gender of the users;

    recording feedback of ASR phrase processing operations during the communication session, wherein each ASR phrase processing operation seeks to match a spoken utterance against at least one entry within the identified speaker-dependent, phrase-based grammar, each entry of the at least one entry within said identified speaker-dependent, phrase-based grammar having a plurality of grammar option weights, each of the plurality of grammar option weights corresponding to a respective speech processing context, wherein the grammar option weights affect which entries are matched to the spoken utterances;

    automatically adjusting the grammar option weights based upon recorded feedback data for the communication session to improve accuracy of the identified speaker-dependent, phrase-based grammar.

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