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Method and system for speech recognition using grammar weighted based upon location information

  • US 7,328,155 B2
  • Filed: 01/07/2004
  • Issued: 02/05/2008
  • Est. Priority Date: 09/25/2002
  • Status: Expired due to Fees
First Claim
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1. A method of providing weighted grammars for speech recognition in a vehicle navigation system, the method comprising:

  • receiving grammar for speech recognition, the grammar including a plurality of tokens;

    receiving geographical information corresponding to the tokens;

    receiving location information indicating the location of a vehicle for which the vehicle navigation system is used;

    calculating weights corresponding to the tokens based upon the location information and the geographical information,wherein the geographical information includes distances between the vehicle location and locations corresponding to the tokens and the size of the locations corresponding to the tokens, and the weight (W) associated with each of the tokens is calculated by;


    W=SG/(Dcg+C),where SG is the size of the location corresponding to the token, Dcg is the distance from the vehicle location to the location corresponding to the token, and C is a predetermined constant.

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