DE3478268D1 - Echo canceller with an adaptive digital filter for a transmission system - Google Patents

Echo canceller with an adaptive digital filter for a transmission system

Info

Publication number
DE3478268D1
DE3478268D1 DE8484401082T DE3478268T DE3478268D1 DE 3478268 D1 DE3478268 D1 DE 3478268D1 DE 8484401082 T DE8484401082 T DE 8484401082T DE 3478268 T DE3478268 T DE 3478268T DE 3478268 D1 DE3478268 D1 DE 3478268D1
Authority
DE
Germany
Prior art keywords
echo
data
local
digital filter
pct
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
DE8484401082T
Other languages
English (en)
Inventor
Madeleine Bonnet
Odile Macchi
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.)
Centre National de la Recherche Scientifique CNRS
Original Assignee
Centre National de la Recherche Scientifique CNRS
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 Centre National de la Recherche Scientifique CNRS filed Critical Centre National de la Recherche Scientifique CNRS
Application granted granted Critical
Publication of DE3478268D1 publication Critical patent/DE3478268D1/de
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
    • H04B3/232—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 using phase shift, phase roll or frequency offset correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
DE8484401082T 1983-05-26 1984-05-25 Echo canceller with an adaptive digital filter for a transmission system Expired DE3478268D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8308713A FR2546693B1 (fr) 1983-05-26 1983-05-26 Annuleur d'echo a filtre numerique adaptatif pour systeme de transmission

Publications (1)

Publication Number Publication Date
DE3478268D1 true DE3478268D1 (en) 1989-06-22

Family

ID=9289195

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484401082T Expired DE3478268D1 (en) 1983-05-26 1984-05-25 Echo canceller with an adaptive digital filter for a transmission system

Country Status (8)

Country Link
US (1) US4852081A (de)
EP (1) EP0127544B1 (de)
JP (1) JPH0738602B2 (de)
AT (1) ATE43213T1 (de)
CA (1) CA1224254A (de)
DE (1) DE3478268D1 (de)
FR (1) FR2546693B1 (de)
WO (1) WO1984004858A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01254024A (ja) * 1988-04-02 1989-10-11 Hitachi Ltd Ａ／ｄ変換器
US5388092A (en) * 1989-06-27 1995-02-07 Nec Corporation Echo canceller for two-wire full duplex digital data transmission
US5668794A (en) * 1995-09-29 1997-09-16 Crystal Semiconductor Variable gain echo suppressor
US6052462A (en) * 1997-07-10 2000-04-18 Tellabs Operations, Inc. Double talk detection and echo control circuit
KR100329427B1 (ko) * 1999-07-16 2002-03-20 손경식 스테레오 음향반향 제거기 및 그 제거방법
US6934387B1 (en) 1999-12-17 2005-08-23 Marvell International Ltd. Method and apparatus for digital near-end echo/near-end crosstalk cancellation with adaptive correlation
KR100735277B1 (ko) * 2003-07-30 2007-07-03 삼성전자주식회사 광대역 무선 접속 통신 시스템에서 레인징 방법
US7065207B2 (en) * 2003-09-11 2006-06-20 Freescale Semiconductor, Inc. Controlling attenuation during echo suppression

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1115559B (it) * 1978-08-29 1986-02-03 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per la cancellazione numerica dell eco
NL7902053A (nl) * 1979-03-15 1980-09-17 Philips Nv Echocompensator voor homochrone data overdrachtssyste- men.
DE2921780C3 (de) * 1979-05-29 1982-02-11 Siemens AG, 1000 Berlin und 8000 München Verfahren und Schaltungsanordnung zur Übertragung von Daten über eine Zweidrahtleitung
FR2460075B1 (fr) * 1979-06-22 1988-12-09 Cit Alcatel Annuleur d'echo adaptatif pour transmission de donnees en duplex
FR2479617A1 (fr) * 1980-03-26 1981-10-02 Trt Telecom Radio Electr Annuleur d'echo pour signal d'echo a phase variable
DE3173306D1 (en) * 1981-09-08 1986-02-06 Ibm Data receiving apparatus with listener echo canceller
US4682358A (en) * 1984-12-04 1987-07-21 American Telephone And Telegraph Company Echo canceller

Also Published As

Publication number Publication date
EP0127544A1 (de) 1984-12-05
JPS60501438A (ja) 1985-08-29
FR2546693B1 (fr) 1985-08-30
EP0127544B1 (de) 1989-05-17
FR2546693A1 (fr) 1984-11-30
WO1984004858A1 (fr) 1984-12-06
ATE43213T1 (de) 1989-06-15
US4852081A (en) 1989-07-25
CA1224254A (fr) 1987-07-14
JPH0738602B2 (ja) 1995-04-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee