EXCEPTION DICTIONARY CREATING UNIT, EXCEPTION DICTIONARY CREATING METHOD, AND PROGRAM THEREFOR, AS WELL AS SPEECH RECOGNITION UNIT AND SPEECH RECOGNITION METHOD

  • US 20110131038A1
  • Filed: 08/07/2009
  • Published: 06/02/2011
  • Est. Priority Date: 08/11/2008
  • Status: Abandoned Application
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First Claim
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1. An exception dictionary creating device for creating an exception dictionary used for a converter converting a text sequence of a vocabulary to be recognized into a phonetic symbol sequence on the basis of a rule of converting the text sequence of the vocabulary into the phonetic symbol sequence and the exception dictionary storing the text sequence of an exception word not to be converted by the rule and a correct phonetic symbol sequence of the text sequence in correlation with each other, the exception dictionary creating device comprising:

  • a text-to-phonetic symbol converting unit for converting the text sequence of the vocabulary to be recognized into the phonetic symbol sequence;

    a recognition degradation contribution degree calculating unit for calculating a recognition degradation contribution degree that is a degree of exerting an influence on degradation of a speech recognition performance due to a difference between a converted phonetic symbol sequence which is a conversion result of the text-to-phonetic symbol converting unit and the correct phonetic symbol sequence of the text sequence of the vocabulary to be recognized, when the converted phonetic symbol sequence is not identical to the correct phonetic symbol sequence; and

    an exception dictionary registering unit for selecting the vocabulary to be recognized that is a subject to be registered from a plurality of the vocabularies to be recognized on the basis of the recognition degradation contribution degree for each of the plurality of the vocabularies to be recognized by the recognition degradation contribution degree calculating unit, and for registering in the exception dictionary the text sequence of the vocabulary to be recognized that is a selected subject to be registered and the correct phonetic symbol sequence of the text sequence.

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