Invention Grant
- Patent Title: Method and apparatus for reducing echo
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Application No.: US14969448Application Date: 2015-12-15
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Publication No.: US09697846B2Publication Date: 2017-07-04
- Inventor: Sheng Wu , Bin Jiang , Fuhuei Lin , Jingming Xu , Ye Yuan , Yaqin Yong , Wei Ji
- Applicant: Spreadtrum Communications (Shanghai) Co., Ltd.
- Applicant Address: CN Zhangjiang, Shanghai
- Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
- Current Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
- Current Assignee Address: CN Zhangjiang, Shanghai
- Agency: Cantor Colburn LLP
- Priority: CN201410857171 20141230
- Main IPC: G10L21/02
- IPC: G10L21/02 ; H04B3/20 ; H04R3/00 ; G10L21/0208 ; H04B3/23 ; H04M9/08 ; H04R3/02

Abstract:
The embodiments of the present disclosure provide a method and an apparatus for reducing an echo, which apply a first stage adaptive filter to a downlink reference signal to obtain a first stage filtered signal and a first error signal; after performing a K-path gain process and a K-path pre-distortion process to the downlink reference signal, apply the at least one second stage adaptive filter to a K-path pre-distorted signal to obtain a second stage filtered signal and a second error signal; and perform a minimum value fusion process to the first error signal and the second error signal so as to obtain a residue signal, which is considered as a final output of adaptive echo cancellation. Accordingly, the present disclosure realizes steadily providing a relatively high echo loss under a circumstance that a speaker suffers a relatively great distortion.
Public/Granted literature
- US20160189727A1 METHOD AND APPARATUS FOR REDUCING ECHO Public/Granted day:2016-06-30
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