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Systems and methods for speech indexing

  • US 8,326,631 B1
  • Filed: 03/31/2009
  • Issued: 12/04/2012
  • Est. Priority Date: 04/02/2008
  • Status: Active Grant
First Claim
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1. A method of indexing speech, comprising:

  • associating a first phonetic sequence with a first position in an audio signal using a phonetic recognizer;

    associating said first phonetic sequence to a first linguistic element based on a first parameter;

    associating a second linguistic element with a second position in said audio signal using a large vocabulary speech recognizer (LVSR);

    comparing said first position and said second position to determine a phrase window;

    comparing said first linguistic element to said second linguistic element if said phrase window meets a first criteria; and

    adjusting said first parameter based upon a result of said step of comparing said first linguistic elementwherein said step of associating said second linguistic element is performed on a lesser portion of said audio signal than said step of associating said first phonetic sequence with said first position;

    wherein said step of associating said first phonetic sequence to said first linguistic element also associates said first linguistic element with a confidence value and said lesser portion of said audio signal is selected to correspond to said first linguistic element based upon said confidence value.

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