Method and device for operating voice-controlled systems in motor vehicles
AssigneeVolkswagen Aktiengesellschaft
InventorsKlaus Schaaf, Juergen Schultz, Volker Thoermann
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Abstract
A device for operating voice-controlled systems, such as communication and/or intercommunication systems in motor vehicles, includes a plurality of microphones and at least one loudspeaker. Voice signals received by the microphones are transmitted to the at least one loudspeaker. The voice signals are subjected to a low-value frequency shift before being transmitted to the loudspeaker(s) or to the input of a voice-controlled device to thereby suppress feedback.
Claims14
A method for operating a voice-controlled system in a motor vehicle, comprising the steps of:
- detecting a total signal by a plurality of microphones, the total signal including a voice signal and a background noise signal;
- performing a frequency shift by an amount of Δ F on the total signal detected by each microphone;
- subtracting the frequency-shifted total signal of a first one of the plurality of microphones from the detected total signal of a second one of the plurality of microphones before shifting the frequency of the total signal of the second one of the plurality of the microphones and vice versa;
- and
- transmitting the frequency-shifted total signal to one of an input to a voice-controlled device and at least one loudspeaker.
A device for operating a voice-controlled system in a motor vehicle, the motor vehicle including a passenger compartment divided into at least two subsections, each subsection including at least one microphone and at least one loudspeaker, the device comprising:
- a transmitter for transmitting at least one of voice messages and voice commands;
- a frequency-shifting device connected between the microphones of one of the subsections and the loudspeakers of another one of the subsections;
- and
- a summation point corresponding to each subsection, the summation point subtractively superimposing a parallelly tapped loudspeaker signal and the microphone signal of the respective subsection.
A method for operating a voice-controlled system in a motor vehicle, comprising the steps of:
- detecting a total signal by a plurality of microphones, the total signal including a voice signal and a background noise signal;
- performing a frequency shift by an amount of Δ F on the total signal detected by each microphone;
- subtracting the frequency-shifted total signal of a first one of the plurality of microphones from the detected total signal of a second one of the plurality of microphones before shifting the frequency of the total signal of the second one of the plurality of the microphones and vice versa;
- and
- transmitting the frequency-shifted total signal to one of an input to a voice-controlled device and at least one loudspeaker,
- wherein Δ F is 5 Hz.
A method for operating a voice-controlled system in a motor vehicle, comprising the steps of:
- detecting a total signal by a plurality of microphones, the total signal including a voice signal and a background noise signal;
- performing a frequency shift by an amount of Δ F on the total signal detected by each microphone;
- subtracting the frequency-shifted total signal of a first one of the plurality of microphones from the detected total signal of a second one of the plurality of microphones before shifting the frequency of the total signal of the second one of the plurality of the microphones and vice versa;
- and
- transmitting the frequency-shifted total signal to one of an input to a voice-controlled device and at least one loudspeaker,
- wherein the frequency shift performed on the total signal of the first microphone is by a first amount Δ F, and the frequency shift performed on the total signal of the second microphone is by a second amount Δ F different than the first amount Δ F.
A device for operating a voice-controlled system in a motor vehicle, the motor vehicle including a passenger compartment divided into at least two subsections, each subsection including at least one microphone and at least one loudspeaker, the device comprising:
- a transmitter for transmitting at least one of voice messages and voice commands;
- a frequency-shifting device connected between the microphones of one of the subsections and the loudspeakers of another one of the subsections;
- and
- a summation point corresponding to each subsection, the summation point subtractively superimposing a parallelly tapped loudspeaker signal and the microphone signal of the respective subsection,
- wherein the frequency-shifting device is configured to perform a frequency shift by an amount of Δ F on each microphone signal.
Dependencies are inferred from the claim text.