Title:
ACTIVE NOISE REDUCTION METHOD, DEVICE AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/135340
Kind Code:
A1
Abstract:
An active noise reduction method. The method comprises: collecting an ambient sound, and determining an ambient audio signal; determining a working state, and determining at least one corresponding useful signal according to the working state, and then removing the at least one useful signal from the ambient audio signal to obtain a reference signal, wherein the useful signal comprises the content of interest to a user; if the method is applied to an earphone, determining a signal to be played according to a reference signal, and playing said signal, such that the reference signal is superposed with the ambient sound, and at least one useful signal is reserved and the environmental noise is cancelled; and if the method is applied to a cooperative device, determining said signal according to the reference signal, and sending said signal to the earphone. By removing the content of interest to the user from the reference signal, the content of interest to the user is still retained in the noise-reduced audio data when active noise reduction is performed.
More Like This:
| WO/2020/107400 | RECEIVER AND HEARING AID WITH SAME |
| WO/2021/036154 | NOISE REDUCTION CONVERSATION SYSTEM |
| WO/2022/164181 | HEADSET FOR ONLINE VIDEO LEARNING |
Inventors:
ZHANG LIBIN (CN)
YUAN TINGQIU (CN)
ZHANG HUIMIN (CN)
YUAN TINGQIU (CN)
ZHANG HUIMIN (CN)
Application Number:
PCT/CN2021/139667
Publication Date:
June 30, 2022
Filing Date:
December 20, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H04R1/10; G10K11/178; G10L17/00; G10L19/02; G10L19/26; G10L25/24
Foreign References:
| CN104616662A | 2015-05-13 | |||
| CN109686367A | 2019-04-26 | |||
| CN111886878A | 2020-11-03 | |||
| CN107979790A | 2018-05-01 | |||
| CN109218882A | 2019-01-15 | |||
| CN202011535004A | 2020-12-22 |
Other References:
ANC ACTIVE NOISE CANCELLATION THEORY AND MATLAB CODE IMPLEMENTATION, Retrieved from the Internet
ANC NOISE CANCELLATION LEARNING, Retrieved from the Internet
ANC NOISE CANCELLATION LEARNING, Retrieved from the Internet
Attorney, Agent or Firm:
E-TONE INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
Download PDF:
Previous Patent: MESSAGE CONTENT INPUT METHOD AND APPARATUS, AND ELECTRONIC DEVICE
Next Patent: COMMUNICATION METHOD AND SYSTEM, AND ELECTRONIC DEVICE
Next Patent: COMMUNICATION METHOD AND SYSTEM, AND ELECTRONIC DEVICE