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Methods and apparatus for identifying fraudulent callers

  • US 9,837,078 B2
  • Filed: 11/09/2012
  • Issued: 12/05/2017
  • Est. Priority Date: 11/09/2012
  • Status: Active Grant
First Claim
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1. A method of voice print matching which comprises:

  • receiving a telephonic communication from an unknown caller;

    separating a first portion of the telephonic communication into silent and non-silent segments;

    evaluating the non-silent segments to determine which portions thereof are speech or non-speech;

    generating a plurality of parameters that determine what is speech and non-speech in the non-silent segments;

    using the generated parameters to determine what is speech and non-speech for at least the remainder of the telephonic communication;

    comparing the speech to a Universal Background Model (UBM);

    selecting a number of audio elements of the UBM that characterize the speech of the unknown caller relative to other audio elements of the UBM;

    selecting audio elements of the speech that correspond to the selected audio elements of the UBM; and

    comparing the selected audio elements of the speech to matching audio elements of a plurality of recorded voice prints from a plurality of fraudulent speakers to determine whether the speech belongs to a fraudulent speaker.

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