Patent ID: 7536304
Filing Date: 2009-05-19
Classification: G06F,G07C,G10L

Abstract:
1. A method for voice authentication on a device, comprising: receiving one or more spoken utterances from a user at the device; recognizing a phrase corresponding to said one or more spoken utterances; identifying a biometric voice print from the one or more spoken utterances of said phrase; verifying a location of said device; determining a device identifier associated with said device; authenticating said user based on the phrase, said biometric voice print, said location, and said device identifier; establishing a connection to at least one authentication server; sending a user profile to said at least one authentication server; comparing said user profile with a plurality of reference profiles stored on said at least one authentication server; upon recognizing the phrase, evaluating one or more vocal tract configuration differences between said spoken utterances; matching one or more vocal tract shades of the plurality of reference profiles based on said vocal tract configuration difference; determining at least one formant frequency; determining at least one anti-formant frequency; evaluating a difference between the formant frequency and the anti-formant frequency for characterizing one aspect of a natural change in a vocal tract configuration; and determining if the user profile matches one of the plurality of reference profiles for authenticating said user, wherein a user profile includes at least one of a phrase, a biometric voice print, and a device identifier.