USER-CONTROLLED BEAM STEERING IN MICROPHONE ARRAY

• US 20190069080A1
• Filed: 08/28/2017
• Published: 02/28/2019
• Est. Priority Date: 08/28/2017
• Status: Active Grant

• Current Assignee: Bose Corporation
• Original Assignee: Bose Corporation
• Inventors: Abrams, Darren W., Voigt, William H. A., Norville, Pelham, Rice, William D., Stupak, Noah J., Trotter, John A.
• Granted Patent: US 10,547,937 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/002 Specific input/output arrangements not covered by G06F3/01 - G06F3/16 other optical apparatus G02B27/00
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06F 3/165 Management of the audio stream, e.g. setting of volume, audio stream path
• CPC Class Codes: G10L 2021/02166 Microphone arrays; Beamforming
• CPC Class Codes: G10L 21/0208 Noise filtering
• CPC Class Codes: G10L 21/028 using properties of sound source
• CPC Class Codes: H03G 3/32 the control being dependent upon ambient noise level or sound level
• CPC Class Codes: H04N 21/42222 Additional components integrated in the remote control device, e.g. timer, speaker, sensors for detecting position, direction or movement of the remote control, microphone or battery charging device
• CPC Class Codes: H04N 5/60 for the sound signals
• CPC Class Codes: H04N 7/15 Conference systems
• CPC Class Codes: H04R 1/406 microphones
• CPC Class Codes: H04R 2420/07 Applications of wireless loudspeakers or wireless microphones
• CPC Class Codes: H04R 2430/20 Processing of the output signals of the acoustic transducers of an array for obtaining a desired directivity characteristic H04R2203/12 takes precedence
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407

Abstract

Various aspects include approaches for controlling acoustic beams. In some particular aspects, a system includes: a microphone array; and a control system coupled with the microphone array, the control system programmed to control the microphone array by: processing a signal from a beacon device to identify a physical location of the beacon device relative to the microphone array; and focusing the microphone array in a direction based upon the physical location of the beacon device prior to receiving an audio input at the microphone array.

Claims

1. A system comprising:

a microphone array; and

a control system coupled with the microphone array, the control system programmed to control the microphone array by;

processing a signal from a beacon device to identify a physical location of the beacon device relative to the microphone array; and

focusing the microphone array in a direction based upon the physical location of the beacon device prior to receiving an audio input at the microphone array.

2. The system of claim 1, wherein the beacon device includes a focus mode for pre-focusing the microphone array toward the beacon device or a negation mode for pre-focusing the microphone array away from the beacon device.

3. The system of claim 2, wherein the beacon device is pre-set to the focus mode or the negation mode prior to sending the signal indicating the physical location of the beacon device.

4. The system of claim 1, further comprising a camera system connected with the control system, the camera system for detecting a visual characteristic of a user, the control system further programmed to:

receive a camera signal from the camera system indicating the visual characteristic of the user; and

focus the microphone array in response to the visual characteristic of the user matching a visual characteristic in a stored visual characteristic library.

5. The system of claim 1, wherein the control system includes a digital signal processor for modifying the focus direction of the microphone array in a direction toward the physical location of the beacon device or in a direction away from the physical location of the beacon device.

6. The system of claim 1, wherein the beacon device includes a wireless transceiver configured to communicate with a wireless transceiver in the control system, and wherein the beacon device is movable across a plurality of physical locations relative to the microphone array.

7. The system of claim 1, wherein the beacon device includes at least one of:

a mobile phone, an electronic tablet, a controller, a computing device, a global positioning system (GPS) transceiver, a wearable electronic device or a remote control.

8. An apparatus comprising:

a microphone array; and

a control system coupled with the microphone array, the control system programmed to;

receive a command from a directional controller indicating a desired direction of focus for the microphone array; and

focus the microphone array in the desired direction of focus prior to receiving an audio input at the microphone array.

9. The apparatus of claim 8, wherein the directional controller includes a beacon device, wherein the beacon device includes at least one of a focus mode for pre-focusing the microphone array toward the beacon device or a negation mode for pre-focusing the microphone array away from the beacon device.

10. The apparatus of claim 8, further comprising a camera system connected with the control system, the camera system for detecting a visual characteristic of a user, the control system further programmed to:

receive a camera signal from the directional controller indicating the visual characteristic of the user; and

focus the microphone array in response to the visual characteristic of the user matching a visual characteristic in a stored visual characteristic library.

11. The apparatus of claim 8, wherein the directional controller includes a wireless transceiver configured to communicate with a wireless transceiver in the control system, and wherein the directional controller is movable across a plurality of physical locations relative to the microphone array

12. The apparatus of claim 8, wherein the directional controller includes a user-wearable device for tracking movement of a user, and wherein the desired direction of focus for the microphone array is modifiable based upon the movement of the user.

13. The apparatus of claim 8, wherein the microphone array is contained within a video conferencing system or an audio conferencing system, and wherein the directional controller is at a remote geographic location from the microphone array when sending the command indicating the desired direction of focus for the microphone array.

14. A system comprising:

a control system programmed to control a microphone array by;

providing a prompt to initiate at least one noise source for sampling using the microphone array;

receiving a set of noise source samples of the at least one noise source at the microphone array;

creating a microphone array filter configured to at least partially reject the at least one noise source from the set of noise source samples; and

storing the microphone array filter in a library of microphone array filters.

15. The system of claim 14, wherein the control system is further configured to apply the microphone array filter during at least one of transmitting or receiving an audio signal at the microphone array in response to detecting the at least one noise source.

16. The system of claim 15, wherein the library of microphone array filters includes a relational database including relationships between the microphone array filter and the set of noise source samples.

17. The system of claim 16, wherein applying the microphone array filter includes:

receiving an audio noise signal at the microphone array;

comparing the audio noise signal with the set of noise source samples in the library of microphone array filters; and

modifying a gain on the microphone array in response to the audio noise signal matching at least one of the set of noise source samples.

18. The system of claim 14, wherein creating the set of microphone array filters includes categorizing the noise source samples according to at least one of frequency or amplitude, and correlating control instructions for modifying a gain on the microphone array with the categorized noise source samples.

19. The system of claim 14, wherein the prompt includes a user prompt instructing a user to activate the at least one noise source during a sampling period.

20. The system of claim 14, wherein the control system modifies the direction of the microphone array according to the stored microphone filter in response to detecting the at least one noise source.