MOTOR-VEHICLE VOICE-CONTROL SYSTEM AND MICROPHONE-SELECTING METHOD THEREFOR
First Claim
1. A voice-control system for motor vehicles, the system comprising:
- a plurality of spaced microphones emitting respective microphone signals; and
an evaluation unit connected to the microphones for;
assembling correlation pairs from the signals of two of the microphones,calculating a correlation coefficient for each correlation pair,detecting an energy value for each microphone,detecting a respective delay time of a voice signal between a voice signal source and the each of the microphones, andselecting in dependence on current correlation coefficients of the correlation pairs, on the current energy values of the microphones, and on the current delay time of the voice signal to the microphones, that microphone whose signal is optimal as a basis for the operation of the voice-control system.
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Abstract
A voice-control system for motor vehicles has a plurality of spaced microphones emitting respective microphone signals, and an evaluation unit connected to the microphones. This unit serves for assembling correlation pairs from the signals of two of the microphones, calculating a correlation coefficient for each correlation pair, detecting an energy value for each microphone, detecting a respective delay time of a voice signal between a voice signal source and the each of the microphones, and selecting in dependence on current correlation coefficients of the correlation pairs, on the current energy values of the microphones, and on the current delay time of the voice signal to the microphones, that microphone whose signal is optimal as a basis for the operation of the voice-control system.
17 Citations
12 Claims
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1. A voice-control system for motor vehicles, the system comprising:
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a plurality of spaced microphones emitting respective microphone signals; and an evaluation unit connected to the microphones for; assembling correlation pairs from the signals of two of the microphones, calculating a correlation coefficient for each correlation pair, detecting an energy value for each microphone, detecting a respective delay time of a voice signal between a voice signal source and the each of the microphones, and selecting in dependence on current correlation coefficients of the correlation pairs, on the current energy values of the microphones, and on the current delay time of the voice signal to the microphones, that microphone whose signal is optimal as a basis for the operation of the voice-control system. - View Dependent Claims (2, 3, 4)
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5. A method for selecting a microphone from several spaced-apart microphones provided in a motor vehicle of a voice-control system for operating same, the method comprising the steps of:
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assembling correlation pairs from the signals of two microphones, calculating a correlation coefficient for each correlation pair, detecting an energy value for each microphone, detecting a respective delay time of a voice signal between a voice signal source and each of the microphones, and selecting, depending on the current correlation coefficients of the correlation pairs, on the current energy values of the microphones, and on the current delay times of the voice signal to the microphones that microphone whose signal is currently optimal as a basis for the operation of the voice-control system. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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Specification