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Title:
ACTIVE NOISE REDUCTION METHOD, DEVICE AND CHIP, AND ACTIVE CONTROL SYSTEM AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/248164
Kind Code:
A1
Abstract:
Some of embodiments of the present application provide an active noise reduction method, device and chip, and an active control system and a storage medium. The active noise reduction method comprises: performing frequency-domain adaptive filtering according to an environmental noise signal and an error signal collected at a target noise reduction point, and obtaining a frequency-domain coefficient of an adaptive filter corresponding to a primary channel (201); converting the frequency domain coefficient of the adaptive filter corresponding to the primary channel into a time domain coefficient of an IIR filter (202), wherein the order of the IIR filter is smaller than that of the adaptive filter; and updating the time domain coefficient of the IIR filter to the IIR filter (203), wherein the IIR filter is located on a secondary channel, and is used for filtering the environmental noise signal passing through the secondary channel to output a noise reduction signal. By adopting the embodiments of the present application, the computational complexity and the overhead of hardware resources during the noise reduction process can be reduced while implementing adaptive active noise reduction, which is beneficial to hardware implementation.

Inventors:
ZHU HU (CN)
WANG XINSHAN (CN)
LI GUOLIANG (CN)
GUO HONGJING (CN)
HAN WENKAI (CN)
Application Number:
PCT/CN2019/090912
Publication Date:
December 17, 2020
Filing Date:
June 12, 2019
Export Citation:
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Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H03H21/00; G10K11/178
Foreign References:
CN105356861A2016-02-24
CN107731217A2018-02-23
CN107210718A2017-09-26
GB2487125A2012-07-11
Attorney, Agent or Firm:
SHANGHAI CHENHAO INTELLECTUAL PROPERTY LAW FIRM GENERAL PARTNERSHIP (CN)
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