NOISE REDUCTION FOR ELECTRONIC DEVICES

• US 20160379661A1
• Filed: 06/26/2015
• Published: 12/29/2016
• Est. Priority Date: 06/26/2015
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Kar, Swarnendu, Chatlani, Navin
• Application Number:
  US14/751,613
• Publication Number:
  US 20160379661A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G10L 2021/02165 Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
• CPC Class Codes: G10L 21/0232 Processing in the frequency domain
• CPC Class Codes: G10L 25/78 Detection of presence or absence of voice signals switching of direction of transmission by voice frequency in two-way loud-speaking telephone systems H04M9/10
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
• CPC Class Codes: H04R 2499/15 Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407

Abstract

In one example a controller comprises logic, at least partially including hardware logic, configured to detect speech activity in an audio signal received in a non-aerial microphone and in response to the voice activity, to apply a noise cancellation algorithm to a speech input received in a aerial microphone. Other examples may be described.

Claims

1. A controller, comprising:

logic, at least partially including hardware logic, configured to;

detect speech activity in an audio signal received in a non-aerial microphone; and

in response to the voice activity, to apply a noise cancellation algorithm to a speech input received in a aerial microphone.

2. The controller of claim 1, wherein the controller comprises logic to determine a speech presence probability factor from the audio signal received in the non-aerial microphone.

3. The controller of claim 2, wherein the controller comprises logic to determine a time-varying, frequency dependent smoothing factor using the speech presence probability factor.

4. The controller of claim 3, wherein the controller comprises logic to control a rate of updating a noise estimate to the speech input received in the aerial microphone using the time-varying, frequency dependent smoothing factor.

5. The controller of claim 4, wherein the controller comprises logic to determine a gain factor based at least in part on the speech presence probability factor.

6. The controller of claim 5, wherein the controller comprises logic to apply the gain factor to the speech input received in a aerial microphone.

7. The controller of claim 6, wherein the controller comprises logic to present an audio output on an output device.

8. An electronic device, comprising:

an input/output (I/O) interface to receive a first audio signal from a non-aerial microphone and a second audio signal from an aerial microphone; and

a controller, comprising logic, at least partially including hardware logic, configured to;

detect speech activity in an audio signal received in a non-aerial microphone; and

in response to the voice activity, to apply a noise cancellation algorithm to a speech input received in a aerial microphone.

9. The electronic device of claim 8, wherein the controller comprises logic to determine a speech presence probability factor from the audio signal received in the non-aerial microphone.

10. The electronic device of claim 9, wherein the controller comprises logic to determine a time-varying, frequency dependent smoothing factor using the speech presence probability factor.

11. The electronic device of claim 10, wherein the controller comprises logic to control a rate of updating a noise estimate to the speech input received in the aerial microphone using the time-varying, frequency dependent smoothing factor.

12. The electronic device of claim 11, wherein the controller comprises logic to determine a gain factor based at least in part on the speech presence probability factor.

13. The electronic device of claim 12, wherein the controller comprises logic to apply the gain factor to the speech input received in a aerial microphone.

14. The electronic device of claim 13, wherein the controller comprises logic to present an audio output on an output device.

15. A computer program product comprising logic instructions stored on a tangible computer readable medium which, when executed by a controller, configure the controller to:

detect speech activity in an audio signal received in a non-aerial microphone; and

in response to the voice activity, to apply a noise cancellation algorithm to a speech input received in a aerial microphone.

16. The computer program product of claim 15, comprising logic instructions stored on a tangible computer readable medium which, when executed by the controller, configure the controller to determine a speech presence probability factor from the audio signal received in the non-aerial microphone.

17. The computer program product of claim 16, comprising logic instructions stored on a tangible computer readable medium which, when executed by the controller, configure the controller to determine a time-varying, frequency dependent smoothing factor using the speech presence probability factor.

18. The computer program product of claim 17, comprising logic instructions stored on a tangible computer readable medium which, when executed by the controller, configure the controller to control a rate of updating a noise estimate to the speech input received in the aerial microphone using the time-varying, frequency dependent smoothing factor.

19. The computer program product of claim 18, comprising logic instructions stored on a tangible computer readable medium which, when executed by the controller, configure the controller to determine a gain factor based at least in part on the speech presence probability factor.

20. The computer program product of claim 19, comprising logic instructions stored on a tangible computer readable medium which, when executed by the controller, configure the controller to apply the gain factor to the speech input received in a aerial microphone.

21. The computer program product of claim 20, comprising logic instructions stored on a tangible computer readable medium which, when executed by the controller, configure the controller to present an audio output on an output device.