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Speech recognition method and apparatus

  • US 20020046028A1
  • Filed: 10/11/2001
  • Published: 04/18/2002
  • Est. Priority Date: 10/12/2000
  • Status: Active Grant
First Claim
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1. A speech recognition apparatus comprising:

  • a hierarchical dictionary section stored with a plurality of speech recognition dictionaries having a plurality of reference speech signals with mutual association in a hierarchical fashion;

    extracting means for extracting a proper speech recognition dictionary from said hierarchical dictionary section;

    list storing means for storing the extracted speech recognition dictionary;

    speech input means for inputting a speech;

    recognizing means for comparing an input speech with the reference speech information in the speech recognition dictionary stored in said list storing means to recognize the speech;

    wherein said extracting means extracts a speech recognition dictionary belonging to a lower hierarchical level of the reference speech information corresponding to the speech recognized and said list storing means updates and stores the extracted speech recognition dictionary, said speech recognition apparatus;

    wherein reference speech information representative of hierarchical-level skipping is prepared in a predetermined speech recognition dictionary so that, when said recognizing means recognizes a speech input corresponding to the reference speech information representative of hierarchical-level skipping, said extracting means extracts, and updates and stores to said list storing means, a speech recognition dictionary belonging to a lower hierarchical level of the reference speech information stored in said list storing means.

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