Active noise cancellation method, device, and system

Patent metadata

Field	Value
Publication number	US-12488776-B2
Application number	US-202318338851-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Dec 22, 2020
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

The present discloser relates to a method for active noise cancellation. An example method includes: capturing an ambient sound to determine an ambient audio signal; and determining a working status, determining at least one corresponding wanted signal based on the working status, and then removing the at least one wanted signal from the ambient audio signal, to obtain a reference signal, where the wanted signal includes content of interest. The example method further includes determining a to-be-played signal based on the reference signal.

First claim

What is claimed is:

1 . A method, wherein the method is applied to a collaboration device or a headset, and the method comprises:
capturing an ambient sound around the collaboration device or the headset, and determining an ambient audio signal; determining a working status of the collaboration device or the headset; determining, based on a preset correspondence between a working status and a wanted signal, at least one wanted signal related to the working status of the collaboration device or the headset, wherein the at least one wanted signal comprises target content; removing at least one filtered wanted signal from the ambient audio signal, to obtain a reference signal, wherein the at least one filtered wanted signal is determined by band-pass filtering the at least one wanted signal, and the at least one filtered wanted signal is within a band-pass filtering range determined based on the working status of the collaboration device or the headset; and determining, based on the reference signal, a to-be-played signal for active noise cancellation, wherein after the headset plays the to-be-played signal, ambient noise is canceled and the target content in an environment is retained.

2 . The method according to claim 1 , wherein the determining a working status of the collaboration device or the headset comprises at least one of: determining a working scenario of the collaboration device or the headset, or determining a working mode of the collaboration device or the headset.

3 . The method according to claim 2 , wherein the determining a working scenario of the collaboration device or the headset comprises:
obtaining environment information of the collaboration device or the headset; and determining, based on a preset correspondence between environment information and a working scenario, a working scenario that is of the collaboration device or the headset and that is corresponding to the environment information of the collaboration device or the headset.

4 . The method according to claim 3 , wherein the environment information comprises at least one of the following: geographical location information, the ambient audio signal, or an ambient video signal.

5 . The method according to claim 3 , wherein the determining a working scenario of the collaboration device or the headset further comprises:
determining one or more of a historical habit preference of a user, a current trip, current time information, or at least one of a device status of the collaboration device or a device status of the headset; and wherein the determining, based on a preset correspondence between environment information and a working scenario, a working scenario that is of the collaboration device or the headset and that is corresponding to the environment information of the collaboration device or the headset comprises: determining, based on the environment information and with reference to the one or more of the historical habit preference of the user, the current trip, the current time information, or at least one of the device status of the collaboration device or the device status of the headset, the working scenario that is of the collaboration device or the headset and that is corresponding to the environment information of the collaboration device or the headset.

6 . The method according to claim 2 , wherein the determining a working mode of the collaboration device or the headset comprises:
receiving, by the collaboration device or the headset, a first input instruction, wherein the first input instruction indicates a selected working mode from a plurality of prestored working modes; and determining the working mode of the collaboration device or the headset based on the first input instruction, wherein the working mode is in an active noise cancellation mode.

7 . The method according to claim 6 , wherein the method is applied to the collaboration device, and wherein the method further comprises:
receiving a working mode of the headset sent by the headset; and using the working mode of the headset as the working mode of the collaboration device; or determining the working mode of the collaboration device based on the first input instruction and the working mode of the headset.

8 . The method according to claim 6 , wherein the method is applied to the headset, and wherein the method further comprises:
receiving a working mode of the collaboration device sent by the collaboration device; and using the working mode of the collaboration device as the working mode of the headset; or determining the working mode of the headset based on the first input instruction and the working mode of the collaboration device.

9 . The method according to claim 1 , wherein the determining at least one wanted signal related to the working status comprises:
determining the at least one wanted signal that is related to the working status and prestored in the collaboration device or the headset.

10 . The method according to claim 1 , wherein the determining at least one wanted signal related to the working status comprises:
performing signal separation on the ambient audio signal to obtain at least one sound source signal; and identifying the at least one sound source signal, and determining the at least one wanted signal related to the working status.

11 . A method, wherein the method is applied to a collaboration device or a headset, and the method comprises:
capturing an ambient sound around the collaboration device or the headset, and determining an ambient audio signal; determining at least one wanted signal, wherein the wanted signal comprises target content; performing band-pass filtering on the at least one wanted signal to obtain at least one filtered wanted signal within a band-pass filtering range determined based on a working status of the collaboration device or the headset; removing the at least one filtered wanted signal from the ambient audio signal, to obtain a reference signal; and determining, based on the reference signal, a to-be-played signal for active noise cancellation, wherein after the headset plays the to-be-played signal, ambient noise is canceled and the target content in an environment is retained.

12 . The method according to claim 11 , wherein the determining at least one wanted signal comprises:
determining the working status of the collaboration device or the headset; and determining, based on a preset correspondence between the working status and a wanted signal, at least one wanted signal related to the working status of the collaboration device or the headset.

13 . The method according to claim 12 , wherein the determining a working status of the collaboration device or the headset comprises at least one of: determining a working scenario of the collaboration device or the headset, or determining a working mode of the collaboration device or the headset.

14 . The method according to claim 13 , wherein the determining a working scenario of the collaboration device or the headset comprises:
obtaining environment information of the collaboration device or the headset; and determining, based on a preset correspondence between environment information and a working scenario, a working scenario that is of the collaboration device or the headset and that is corresponding to the environment information of the collaboration device or the headset.

15 . The method according to claim 14 , wherein the environment information comprises at least one of the following: geographical location information, the ambient audio signal, or an ambient video signal.

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Libin
• Yuan Tingqiu
• Zhang Huimin

Classifications

• G10K11/17881

  the reference signal being an acoustic signal, e.g. recorded with a microphone · CPC title

• G10K11/17823

  Reference signals, e.g. ambient acoustic environment · CPC title

• G10L17/06

  Decision making techniques; Pattern matching strategies · CPC title

• G10K2210/511

  Narrow band, e.g. implementations for single frequency cancellation · CPC title

• G10K2210/3028

  Filtering, e.g. Kalman filters or special analogue or digital filters · CPC title