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Multi-Stage Speech Recognition System

  • US 20080189106A1
  • Filed: 12/17/2007
  • Published: 08/07/2008
  • Est. Priority Date: 12/21/2006
  • Status: Abandoned Application
First Claim
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1. A multi-stage recognition method for recognizing a speech signal containing semantic information of two or more classes, comprising:

  • detecting and digitizing the speech signal;

    providing a database having at least one vocabulary list for each class;

    recognizing a portion of the speech signal corresponding to a first class based on a vocabulary list corresponding to the first class, to obtain a first recognition result;

    restricting a vocabulary list corresponding to a second class based on the first recognition result; and

    recognizing a portion of the speech signal corresponding to the second class based upon the restricted vocabulary list, to obtain a second recognition result.

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