Patent Document ID: 9646613
Application ID: 14093200

Base Claim:
1. A method for authenticating users comprising: calculating signal features for an audio digital signal representing a user utterance, the signal features including onset values, the onset values correspond to stress accents in the signal; splitting, by a processor, the signal into a prosodic unit candidate sequence based on the stress accent locations; modifying, by the processor, the prosodic unit candidate sequence based on the signal features, the modified prosodic unit sequence including only true prosodic units calculating a first probability that the true prosodic units match a prosodic unit sequence used to create a hidden Markov model for the user; calculating a second probability that the true prosodic units match prosodic unit sequences used to create a Universal Background Model; and successfully authenticating the user when the difference between the first probability and the second probability is greater than a decision threshold.

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Claim 3:
3. A method in accordance with claim 1 , said modifying step comprising: identifying borders, shared by prosodic unit candidates, located in a high level region of the signal; and moving the identified borders to a low level energy region of the signal.