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Method and apparatus for generating an a priori advisor for a speech recognition dictionary

  • US 5,995,929 A
  • Filed: 09/12/1997
  • Issued: 11/30/1999
  • Est. Priority Date: 09/12/1997
  • Status: Expired due to Term
First Claim
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1. A method for generating a speech recognition dictionary suitable for use in a speech recognition unit of a directory assistance system, said method comprising:

  • providing a plurality of records of call transactions, a record including a first data element indicative of a geographical locality and a second data element indicative of at least a portion of a telephone number dialed on a terminal to access a directory assistance function;

    generating from the plurality of records an a priori data structure including a plurality of probability data elements, the plurality of probability data elements being derived at least in part on the basis of the second data elements;

    providing a set of vocabulary items potentially recognizable on a basis of a spoken utterance, each vocabulary item being indicative of a geographical locality;

    associating at least some of the vocabulary items to probability data elements from said a priori data structure;

    storing the vocabulary items and the associated probability data elements on a computer readable medium capable of being processed by the speech recognition unit of the directory assistance system to perform recognition of an utterance spoken by a user and indicative of a geographical locality, the recognition of the spoken utterance being conditioned on a basis of a telephone number dialed by the user to access a directory assistance function.

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