Hands-Free Telephony and In-Vehicle Communication
First Claim
1. A signal processing system, comprisinga plurality 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;
wherein the signal processing system 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, if it is detected that speech activity is present in the telephone signal.
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Accused Products
Abstract
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.
29 Citations
19 Claims
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1. A signal processing system, comprising
a plurality 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; wherein the signal processing system 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, if it is detected that speech activity is present in the telephone signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An in-vehicle communication system, comprising:
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a plurality of microphones; a plurality of loudspeakers; and a processor configured to; receive a microphone signal supplied by at least one of the microphones; receive a telephone signal transmitted by a remote party; 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; detect speech activity in the telephone signal; and control the amplification of the microphone signal in response to whether or not it is detected that speech activity is present in the telephone signal.
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8. A method for speech communication using a hands-free set and an in-vehicle communication system wherein both are installed in a passenger compartment, the method comprising:
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receiving a telephone signal from a remote party by the hands-free set; determining whether or not speech is present in the received telephone signal; detecting an utterance of a passenger in the passenger compartment by at least one of a set of microphones installed in the passenger compartment to obtain a microphone signal; processing the microphone signal by the in-vehicle communication system to obtain at least one first processed signal; processing the telephone signal by the in-vehicle communication system or the hand-free set to obtain a second processed signal; and outputting the at least one first and/or second processed signal to at least one loudspeaker installed in the passenger compartment; wherein the processing of the microphone signal by the in-vehicle communication system comprises amplifying the microphone signal by a first gain factor when it is determined that no speech is present in the telephone signal and by a second gain factor smaller than the first gain factor when it is determined that speech is present in the telephone signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer program product comprising a computer readable medium having computer-executable instructions for speech communication using a hands-free set and an in-vehicle communication system wherein both are installed in a passenger compartment, the computer-executable instructions comprising:
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computer code for receiving a telephone signal from a remote party by the hands-free set; computer code for determining whether or not speech is present in the received telephone signal; computer code for detecting an utterance of a passenger in the passenger compartment by at least one of a set of microphones installed in the passenger compartment to obtain a microphone signal; computer code for processing the microphone signal by the in-vehicle communication system to obtain at least one first processed signal; computer code for processing the telephone signal by the in-vehicle communication system or the hand-free set to obtain a second processed signal; and computer code for outputting the at least one first and/or second processed signal to at least one loudspeaker installed in the passenger compartment; wherein the computer code for processing of the microphone signal by the in-vehicle communication system includes computer code for amplifying the microphone signal by a first gain factor when it is determined that no speech is present in the telephone signal and by a second gain factor smaller than the first gain factor when it is determined that speech is present in the telephone signal. - View Dependent Claims (16, 17, 18, 19)
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Specification