Hands-free telephony and in-vehicle communication

摘要

The present invention relates to a signal processing system, comprising a number of microphones and loudspeakers, a hands-free set configured to receive a telephone signal from a remote party and to transmit a microphone signal supplied by at least one of the microphones to the remote party; an in-vehicle communication system configured to receive a microphone signal supplied by at least one of the microphones; receive the telephone signal; amplify the microphone signal to obtain at least one first output signal; output the at least one first output signal and/or a second output signal corresponding to the telephone signal to at least one of the loudspeakers; and wherein the signal processing systems is configured to detect speech activity in the telephone signal and to control the in-vehicle communication system to reduce amplification of the microphone signal by a damping factor, if it is detected that speech activity is present in the telephone signal.

主权项

1. A processing system for a combined hands-free telecommunication and in-vehicle communication system for a vehicle, the processing system including an analysis filter bank to obtain microphone sub-band signals or a Fourier transform module to obtain Fourier transformed microphone signals, wherein the processing system is configured to:
receive, by a hands-free set, a telephone signal from a party remote from the vehicle; receive, by an in-vehicle microphone of the in-vehicle communication system, a microphone signal from an occupant of the vehicle; detect speech activity in the telephone signal; reduce amplification of the microphone signal when speech activity is present in the telephone signal; process the microphone signal in the time domain; detect speech activity in microphone signals obtained by at least one of the number of microphones and input in the in-vehicle communication system by processing the microphone signals in the time domain; and supply a signal to the hands-free set operating in the sub-band or Fourier domain that indicates speech activity or no speech activity.