Patent ID: 6683944
Filing Date: 2004-01-27
Classification: H04M,H04Q

Abstract:
A voice transmitter for encoding and transmitting a DTMF signal and an audio signal, comprising:voice encoding means for performing voice-encoding of an inputted audio signal; DTMF encoding means for performing encoding of an inputted DTMF signal; voice-DTMF encoding means for performing voice encoding of an inputted audio signal and a DTMF signal; a first selector for selecting the DTMF signal encoded in the DTMF encoding means, or the DTMF signal voice-encoded in the voice-DTMF encoding means; DTMF transmission control means for monitoring quality of an input signal and a transmission line, congestion of the transmitter, or a call connection, and for controlling selecting operation of the first selector depending on the monitored result; DTMF detecting means for detecting that an inputted signal is a DTMF signal; and a second selector for selecting an output of the voice encoding means when the DTMF detecting means judged the inputted signal not to be a DTMF signal, and for selecting an output signal selected by the first selector when the DTMF detecting means judged the inputted signal to be a DTMF signal.