Patent ID: 6898568

Claim:
A method of performing speaker verification to determine whether a speaker is a registered speaker, the method comprising: a) obtaining an array of frames of compressed audio formants representing the speaker uttering a predetermined pass phrase, each frame within the array including: i) energy data and pitch data characterizing the residue of the speaker uttering the predetermined pass phrase; and ii) a plurality of formant coefficients characterizing the resonance of the speaker uttering the predetermined pass phrase; and b) performing a time domain normalization of the array of frames of compressed audio formants to a sample array of frames of compressed audio formants such that such that the two arrays are of an equal quantity of frames: c) determining whether the speaker is the registered speaker by: generating an array of discrepancy values, each discrepancy value representing the difference between one of: i) an energy value; ii) a pitch value; and iii) a formant coefficient value of a frame of the array and a corresponding energy value: ii) pitch value: and iii) formant coefficient value of a corresponding frame in the sample array; and determining whether the array of discrepancy values is within a predetermined threshold.