Title:
INTERFACE CONVERSION APPARATUS, CALL SYSTEM, AND ECHO CANCELLATION METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/056609
Kind Code:
A1
Abstract:
The embodiments of the present disclosure provide an interface conversion apparatus, a call system, and an echo cancellation method and apparatus. The interface conversion apparatus comprises: a conversion unit, a control unit, an impedance matching unit, and a switch unit, wherein a first port of the conversion unit is connected to a two-line call system, a second port thereof is in selective communication with the control unit or an input end of a four-line call system by means of the switch unit, a third port thereof is connected to an output end of the four-line call system, and a fourth port thereof is connected to an output end of the impedance matching unit; and the impedance matching unit is connected to the control unit.
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Inventors:
LIU DEZHI (CN)
TIAN YI (CN)
TIAN YI (CN)
Application Number:
PCT/CN2021/122681
Publication Date:
April 13, 2023
Filing Date:
October 08, 2021
Export Citation:
Assignee:
SHENZHEN HOLLYLAND TECH CO LTD (CN)
International Classes:
H04B3/23
Foreign References:
| US5204854A | 1993-04-20 | |||
| CN1355962A | 2002-06-26 | |||
| CN1248374A | 2000-03-22 | |||
| CN1361973A | 2002-07-31 |
Attorney, Agent or Firm:
BEIJING BESTIPR INTELLECTUAL PROPERTY LAW CORPORATION (CN)
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