Patent ID: 7039044
Filing Date: 2006-05-02
Classification: H04M,H04Q

Abstract:
1. A method for removing DTMF signals from audio signals comprising the steps of: examining audio signals for potential DTMF signals; preparing the audio signals for transmission as digital packets; while no potential DTMF signals have been detected, promptly transmitting a digital packet after sufficient time has elapsed for a potential DTMF signal to be detected in said digital packet; and if a potential DTMF signal is detected, storing the digital packets and stalling transmission of stored digital packets until DTMF detection can be performed, and if the potential DTMF signal does not result in a DTMF detection, promptly transmitting the stored digital packets, and if the potential DTMF signal does result in a DTMF detection, discarding the stored digital packets and transmitting a control packet containing information relating to characteristics of a DTMF signal that was detected.