| CPC G06F 21/32 (2013.01) [G06F 16/2379 (2019.01); G06F 16/68 (2019.01)] | 18 Claims |
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1. A method for adjusting the threshold in a biometric comparison system, the method comprising:
over a series of biometric comparisons of authentication voice prints to enrollment voice prints, storing the authentication voice prints, and storing a plurality of scores resulting from the biometric comparisons in a first set of a plurality of scores;
creating a second set of biometric comparisons each based on a pairing of a stored authentication voice print and an enrollment voice print, each biometric comparison resulting in a score, the plurality of resulting scores forming a second set of a plurality of scores;
wherein the pairing of the stored authentication voice print and the enrollment voice print is a random pairing;
merging the first set of a plurality of scores with the second set of a plurality of scores to produce a third set of a plurality of scores, the third set of a plurality of scores comprising a plurality of discrete values, each discrete value taken from one of the first set of scores and the second set of scores; and
performing an iterative process over the third set of scores to update the parameters of the Gaussian distribution of the third set of scores.
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