Patent ID: 8189783

Claim:
A method for generating an authorized user profile for a mobile communication device, comprising: sampling an audio stream generated by the mobile communication device during a telephone call between at least two parties; storing an audio sample of the audio stream; determining audio characteristics of the audio sample stored including short-term spectra, speed patterns, and pause patterns; creating the authorized user profile based on the audio characteristics when variation in the audio characteristics are within predetermined statistical tolerances; determining a reliability tolerance of the authorized user profile based on a number indicative of a total number of audio samples, the reliability tolerance indicating an amount a particular audio sample can deviate from the authorized profile and be identified as containing an authorized user's voice; updating the authorized user profile and the reliability tolerance based on a subsequent audio sample received during use of the mobile communication device in a communication; storing a second audio sample generated by the mobile communication device during communication; determining an audio characteristic of the second audio sample stored; creating a second authorized user profile based on the audio characteristic of the second sample stored; and distinguishing the second audio sample from the audio sample stored by comparing the audio characteristics of the audio sample stored with the audio characteristic of the second audio sample.