Title:
DOUBLE TALK DETECTION METHOD, DOUBLE TALK DETECTION DEVICE AND ECHO CANCELLATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/232659
Kind Code:
A1
Abstract:
A double talk detection method, a double talk detection device and an echo cancellation system. The double talk detection method comprises: determining, according to an energy ratio between a far-end digital voice signal and a near-end digital voice signal and a frequency coherence value between the near-end digital voice signal and the far-end digital voice signal, whether a digital voice signal of a near-end speaker is also present in the near-end digital voice signal. The double talk detection method solves the problems of incomplete detection and false detection, thereby improving the precision of double talk detection. When the invention is applied in the field of echo cancellation, echoes in a near-end voice signal can be thoroughly cancelled, thereby improving communication experience for two parties engaging in a call.
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Inventors:
HAN WENKAI (CN)
LI GUOLIANG (CN)
WANG XINSHAN (CN)
GUO HONGJING (CN)
ZHU HU (CN)
LI GUOLIANG (CN)
WANG XINSHAN (CN)
GUO HONGJING (CN)
ZHU HU (CN)
Application Number:
PCT/CN2019/087907
Publication Date:
November 26, 2020
Filing Date:
May 22, 2019
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H04M9/08; H04M3/22
Domestic Patent References:
| WO2000072557A2 | 2000-11-30 |
Foreign References:
| CN101179294A | 2008-05-14 | |||
| CN101179635A | 2008-05-14 | |||
| CN102984406A | 2013-03-20 | |||
| CN109068012A | 2018-12-21 | |||
| CN109348072A | 2019-02-15 |
Other References:
See also references of EP 3796629A4
Attorney, Agent or Firm:
BEIJING HEADSTAY INTELLECTUAL PROPERTY AGENCY (CN)
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