Title:
MULTI-CHANNEL ECHO CANCELLATION METHOD AND RELATED APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/093292
Kind Code:
A1
Abstract:
Disclosed in the present application are a multi-channel echo cancellation method and a related apparatus. The method comprises: obtaining a plurality of far-end audio signals output by a plurality of channels, and obtaining a first filter coefficient matrix corresponding to a k-th frame of microphone signal; performing frame division and blocking processing according to the plurality of far-end audio signals, and determining a far-end frequency domain signal matrix corresponding to the k-th frame of microphone signal, wherein the far-end frequency domain signal matrix comprises far-end frequency domain signals of filter sub-blocks corresponding to the respective plurality of channels; performing filtering processing according to the first filter coefficient matrix and the far-end frequency domain signal matrix to obtain an echo signal in the k-th frame of microphone signal; and then performing echo cancellation according to the frequency domain signals of the k-th frame of microphone signal and the echo signal in the k-th frame of microphone signal to obtain a near-end audio signal output by a target microphone. The solution reduces a time delay caused by reasons such as an echo path, greatly reduces the calculation amount and calculation complexity of multi-channel echo cancellation, and obtains better convergence performance.
Inventors:
ZHU RUI (CN)
LIU ZHIPENG (CN)
LI YUEPENG (CN)
LIU ZHIPENG (CN)
LI YUEPENG (CN)
Application Number:
PCT/CN2022/122387
Publication Date:
June 01, 2023
Filing Date:
September 29, 2022
Export Citation:
Assignee:
TENCENT TECH SHENZHEN CO LTD (CN)
International Classes:
G10L21/0208; G10L21/02; H04M9/08
Foreign References:
| CN111341336A | 2020-06-26 | |||
| CN112242145A | 2021-01-19 | |||
| US20170194015A1 | 2017-07-06 | |||
| CN111213359A | 2020-05-29 | |||
| CN108806709A | 2018-11-13 | |||
| US20120290525A1 | 2012-11-15 | |||
| CN113489855A | 2021-10-08 | |||
| US20020106016A1 | 2002-08-08 | |||
| CN202111424702A | 2021-11-26 |
Other References:
LU CAI-XIA, YANG FEI-RAN, YANG JUN: "A Delayless Frequency-Domain Kalman Filter with Improved Tracking Capability for Acoustic Feedback Cancellation", ACTA ELECTRONICA SINICA, vol. 46, no. 8, 1 January 2018 (2018-01-01), pages 1954 - 1959, XP093069046, DOI: 10.3969/j.issn.0372-2112.2018.08.021
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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