FR2153340A1 - - Google Patents

Info

Publication number
FR2153340A1
FR2153340A1 FR7233313A FR7233313A FR2153340A1 FR 2153340 A1 FR2153340 A1 FR 2153340A1 FR 7233313 A FR7233313 A FR 7233313A FR 7233313 A FR7233313 A FR 7233313A FR 2153340 A1 FR2153340 A1 FR 2153340A1
Authority
FR
France
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.)
Granted
Application number
FR7233313A
Other versions
FR2153340B1 (fr
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.)
Comsat Corp
Original Assignee
Comsat Corp
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 Comsat Corp filed Critical Comsat Corp
Publication of FR2153340A1 publication Critical patent/FR2153340A1/fr
Application granted granted Critical
Publication of FR2153340B1 publication Critical patent/FR2153340B1/fr
Expired 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)
FR7233313A 1971-09-20 1972-09-20 Expired FR2153340B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18177971A 1971-09-20 1971-09-20

Publications (2)

Publication Number Publication Date
FR2153340A1 true FR2153340A1 (fr) 1973-05-04
FR2153340B1 FR2153340B1 (fr) 1976-10-29

Family

ID=22665762

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7233313A Expired FR2153340B1 (fr) 1971-09-20 1972-09-20

Country Status (9)

Country Link
US (1) US3780233A (fr)
JP (1) JPS4839108A (fr)
CA (1) CA959983A (fr)
DE (1) DE2245542A1 (fr)
FR (1) FR2153340B1 (fr)
GB (1) GB1361739A (fr)
IT (1) IT975018B (fr)
NL (1) NL7212368A (fr)
SE (1) SE382897B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2522491A1 (de) * 1974-05-24 1975-12-04 Cit Alcatel Echoloeschvorrichtung fuer eine fernsprechleitung
FR2569322A1 (fr) * 1984-08-17 1986-02-21 Trt Telecom Radio Electr Annuleur d'echo utilisant la modulation delta

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS535008B2 (fr) * 1972-05-15 1978-02-23
JPS5028914A (fr) * 1973-07-14 1975-03-24
FR2517906A1 (fr) * 1981-12-03 1983-06-10 Centre Nat Rech Scient Annulateur d'echo a commande automatique de gain pour systemes de transmission
US4542265A (en) * 1983-05-20 1985-09-17 Gte Lenkurt Incorporated Echo canceller dynamic range extension
GB2213686A (en) * 1987-12-09 1989-08-16 Racal Communications Equip Radio telephone terminal unit
US5157653A (en) * 1990-08-03 1992-10-20 Coherent Communications Systems Corp. Residual echo elimination with proportionate noise injection
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
DE19815942A1 (de) * 1998-04-09 1999-10-14 Cit Alcatel Vielkanal-Echocanceller mit Compander
JP3293029B2 (ja) * 1999-08-20 2002-06-17 株式会社マイクロエムズ 通信装置用２線４線変換回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825764A (en) * 1954-02-24 1958-03-04 Bell Telephone Labor Inc Cross-control compandor used as echo suppressors
US3500000A (en) * 1966-10-31 1970-03-10 Myldred P Kelly Self-adaptive echo canceller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2522491A1 (de) * 1974-05-24 1975-12-04 Cit Alcatel Echoloeschvorrichtung fuer eine fernsprechleitung
FR2569322A1 (fr) * 1984-08-17 1986-02-21 Trt Telecom Radio Electr Annuleur d'echo utilisant la modulation delta
EP0174678A2 (fr) * 1984-08-17 1986-03-19 Telecommunications Radioelectriques Et Telephoniques T.R.T. Annuleur d'écho utilisant la modulation delta
EP0174678A3 (en) * 1984-08-17 1986-03-26 Telecommunications Radioelectriques Et Telephoniques T.R.T. Echo canceller using delta modulation

Also Published As

Publication number Publication date
JPS4839108A (fr) 1973-06-08
DE2245542A1 (de) 1973-03-29
CA959983A (en) 1974-12-24
SE382897B (sv) 1976-02-16
US3780233A (en) 1973-12-18
IT975018B (it) 1974-07-20
NL7212368A (fr) 1973-03-22
FR2153340B1 (fr) 1976-10-29
GB1361739A (en) 1974-07-30

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Legal Events

Date Code Title Description
ST Notification of lapse