JPH0140536B2 - - Google Patents

Info

Publication number
JPH0140536B2
JPH0140536B2 JP58203988A JP20398883A JPH0140536B2 JP H0140536 B2 JPH0140536 B2 JP H0140536B2 JP 58203988 A JP58203988 A JP 58203988A JP 20398883 A JP20398883 A JP 20398883A JP H0140536 B2 JPH0140536 B2 JP H0140536B2
Authority
JP
Japan
Prior art keywords
level
signal
echo
signal level
ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP58203988A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6096037A (ja
Inventor
Hidenori Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP20398883A priority Critical patent/JPS6096037A/ja
Publication of JPS6096037A publication Critical patent/JPS6096037A/ja
Publication of JPH0140536B2 publication Critical patent/JPH0140536B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP20398883A 1983-10-31 1983-10-31 反響消去装置 Granted JPS6096037A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20398883A JPS6096037A (ja) 1983-10-31 1983-10-31 反響消去装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20398883A JPS6096037A (ja) 1983-10-31 1983-10-31 反響消去装置

Publications (2)

Publication Number Publication Date
JPS6096037A JPS6096037A (ja) 1985-05-29
JPH0140536B2 true JPH0140536B2 (OSRAM) 1989-08-29

Family

ID=16482920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20398883A Granted JPS6096037A (ja) 1983-10-31 1983-10-31 反響消去装置

Country Status (1)

Country Link
JP (1) JPS6096037A (OSRAM)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787246A (en) * 1980-11-20 1982-05-31 Nec Corp Echo canceller
JPS57168531A (en) * 1981-04-10 1982-10-16 Nippon Telegr & Teleph Corp <Ntt> Echo erasing device

Also Published As

Publication number Publication date
JPS6096037A (ja) 1985-05-29

Similar Documents

Publication Publication Date Title
JP2518433B2 (ja) ダブルト―ク検出回路
EP0755591B1 (en) Determining echo return loss in echo cancelling arrangements
JP3288383B2 (ja) エコー経路変化の検出方法およびエコー・キャンセラ
US4360712A (en) Double talk detector for echo cancellers
US4852161A (en) Echo canceller using an echo path status detection
JPH10242891A (ja) エコーキャンセラ
EP0053202B1 (en) Improved double talk detector for echo cancellers
US6215880B1 (en) Two-wire conference apparatus with echo canceler without training
EP1560348B1 (en) Method for detecting echo path changes in echo cancellers
JPH0140536B2 (OSRAM)
JPH08256089A (ja) エコー打消装置
JPH0131731B2 (OSRAM)
JP3370594B2 (ja) エコーキャンセラのフィルタ係数更新制御装置
JPS6016773B2 (ja) 双方向通話検出器
JP3865050B2 (ja) エコーキャンセラ装置
JP2949989B2 (ja) エコー消去装置
JP3323068B2 (ja) エコーキャンセラ
JPH0695653B2 (ja) エコー補償装置
JPH0456421A (ja) エコーキャンセラー
JP2516260B2 (ja) エコ―キャンセラ
JPS5961234A (ja) 適応型反響消去装置
JPH0821881B2 (ja) エコ−キヤンセラのダブルト−ク検出制御方法
JPH04262627A (ja) エコーキャンセラ装置
JPS63234733A (ja) エコ−キヤンセラ
JPS63318821A (ja) 反響消去装置