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System and method for robust access and entry to large structured data using voice form-filling

  • US 9,824,682 B2
  • Filed: 10/19/2015
  • Issued: 11/21/2017
  • Est. Priority Date: 08/26/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a speech;

    recognizing the speech using a phonotactic grammar to generate a phone lattice;

    removing silence and filler words from the phone lattice, to yield a revised phone lattice;

    normalizing, via a processor, costs in the revised phone lattice such that a cost of a best path is set to zero;

    generating a cost-normalized query using factors of interest, wherein an index of words is indexed by the factors of interest;

    generating, via the processor and by performing a first pass of entries in a database, a shortlist of recognized speech possibilities using the revised phone lattice, the index of words, and indices contained in the cost-normalized query;

    performing a second pass on the shortlist of recognized speech possibilities using a grammar generated from the entries in the database to obtain a final result; and

    providing a response to the speech based on the final result.

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