Title:
ECHO CANCELLATION METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/088443
Kind Code:
A1
Abstract:
The invention discloses an echo cancellation method. The method comprises: obtaining a mixed signal mixing a user voice produced by a user and an echo produced by a speaker, obtaining, according to a sound volume of a sound produced by the speaker, a sound signal produced by the speaker, and setting the sound signal to be a reference signal; obtaining, according to a comparison between the mixed signal and the reference signal, a gain coefficient of the reference signal, and obtaining, according to the gain coefficient, a gain signal of the reference signal; obtaining, according to the gain signal and a corresponding predefined compensation coefficient, a compensation signal of the reference signal; inverting the compensation signal; and combining the inverted compensation signal and the mixed signal to cancel the echo produced by the speaker. The invention also discloses an echo cancellation system. The invention can enhance the effect of cancelling an echo in a mixed signal.
Inventors:
GAO WEIBIAO (CN)
ZHU SHENGLIN (CN)
ZHU SHENGLIN (CN)
Application Number:
PCT/CN2016/084821
Publication Date:
June 01, 2017
Filing Date:
June 03, 2016
Export Citation:
Assignee:
SHENZHEN TCL DIGITAL TECH LTD (CN)
International Classes:
H04R3/02
Foreign References:
| CN105516859A | 2016-04-20 | |||
| CN104754157A | 2015-07-01 | |||
| US20120287968A1 | 2012-11-15 | |||
| CN103077726A | 2013-05-01 |
Other References:
See also references of EP 3383064A4
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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