Apparatus and method for controlling beamforming microphone considering location of driver seat

Patent metadata

Field	Value
Publication number	US-9571922-B2
Application number	US-201414483963-A
Country	US
Kind code	B2
Filing date	Sep 11, 2014
Priority date	Oct 25, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An apparatus for controlling a beamforming microphone considering the location of a driver seat may include: a driver seat sensor configured to sense the location of the driver seat and output the sensed location as a driver seat signal; a directivity control unit configured to calculate a beamforming angle based on the driver seat signal; and a signal processing unit configured to process voice signals outputted from first and second microphones, respectively, and extract and output a voice signal generated from a direction which coincides with the beamforming angle.

First claim

What is claimed is:

1. An apparatus for controlling beamforming in a vehicle, the apparatus comprising:
a driver seat sensor configured to detect a position of the driver seat relative to a longitudinal direction of the vehicle;
a controller configured to calculate a beamforming angle of a microphone array based on the position of the driver seat for aligning the beamforming angle with the position of the driver seat and further configured to calculate an angular width around the calculated beamforming angle based on a speed of the vehicle such that the angular width becomes narrower as the speed of the vehicle is higher and such that sound received from within the angular width around the beamforming angle is processed to extract voice signals, wherein the angular width is calculated based on the speed of the vehicle after calculating the beamforming angle based on the position of the driver seat; and
a signal processor configured to process voice signals from the microphone array in view of the calculated beamforming angle and the calculated angular width.

2. The apparatus of claim 1 , wherein the calculated beamforming angle corresponds to a direction toward the driver seat from the central point between a first microphone and a second microphone of the microphone array.

3. The apparatus of claim 1 , further comprising an electronic control unit configured to control overall operations of a hands free system, and transmit the position of the driver seat detected by the driver seat sensor to the controller.

4. The apparatus of claim 1 , wherein the controller is configured to calculate the beamforming angle using a previously stored table which associates the position of the driver seat with the beamforming angle.

5. The apparatus of claim 1 , wherein the controller is configured to calculate the angular width further based on intensity of noise contained in the voice signals.

6. A method for controlling beamforming in a vehicle, the method comprising:
sensing, by a driver seat sensor, a location of the driver seat relative to a longitudinal direction of the vehicle;
calculating, by a controller, a beamforming angle of a microphone array based on the position of the driver seat for aligning the beamforming angle with the position of the driver seat;
calculating an angular width around the calculated beamforming angle based on a speed of the vehicle such that the angular width becomes narrower as the speed of the vehicle is higher and such that sound received from within the angular width around the beamforming angle is processed to extract voice signals, wherein the angular width is calculated based on the seed of the vehicle after calculating the beamforming angle based on the position of the driver seat; and
processing, by a signal processor, voice signals from the microphone array in view of the calculated beamforming angle and the calculated angular width.

7. The method of claim 6 , wherein the calculated beamforming angle corresponds to a direction toward the driver seat from the central point between locations a first microphone and a second microphone of the microphone array.

8. The method of claim 6 , wherein in the calculating of the beamforming angle,
the beamforming angle is calculated through a previously stored table which associates the location of the driver seat with the beamforming angle.

9. The method of claim 6 , wherein the angular width is further based on intensity of noise contained in the voice signals.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Kwon Min Ho

Classifications

• H04R2499/13

  Acoustic transducers and sound field adaptation in vehicles · CPC title

• H04R3/005 Primary

  for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407) · CPC title

• H04R1/326 Primary

  for microphones (H04R1/34 and H04R1/40 take precedence) · CPC title

• H04R1/32 Primary

  for obtaining desired directional characteristic only {(specially adapted for hearing aids H04R25/40)} · CPC title