DE3783605T2 - Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung. - Google Patents

Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung.

Info

Publication number
DE3783605T2
DE3783605T2 DE8787430012T DE3783605T DE3783605T2 DE 3783605 T2 DE3783605 T2 DE 3783605T2 DE 8787430012 T DE8787430012 T DE 8787430012T DE 3783605 T DE3783605 T DE 3783605T DE 3783605 T2 DE3783605 T2 DE 3783605T2
Authority
DE
Germany
Prior art keywords
echocompensation
data transfer
wire line
transfer over
over
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 - Fee Related
Application number
DE8787430012T
Other languages
English (en)
Other versions
DE3783605D1 (de
Inventor
Jacques Belloc
Emile Morlec
Dominique Godard
Michel Quintin
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of DE3783605D1 publication Critical patent/DE3783605D1/de
Application granted granted Critical
Publication of DE3783605T2 publication Critical patent/DE3783605T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H04B3/237—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 two adaptive filters, e.g. for near end and for end echo cancelling
    • 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
    • H04B3/238—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 initial training sequence
DE8787430012T 1987-04-22 1987-04-22 Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung. Expired - Fee Related DE3783605T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87430012A EP0287742B1 (de) 1987-04-22 1987-04-22 Echokompensationseinrichtung für Datenübertragung über eine Zweidrahtleitung

Publications (2)

Publication Number Publication Date
DE3783605D1 DE3783605D1 (de) 1993-02-25
DE3783605T2 true DE3783605T2 (de) 1993-07-15

Family

ID=8198302

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787430012T Expired - Fee Related DE3783605T2 (de) 1987-04-22 1987-04-22 Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung.

Country Status (4)

Country Link
US (1) US4887257A (de)
EP (1) EP0287742B1 (de)
JP (1) JPS63274226A (de)
DE (1) DE3783605T2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403716B1 (de) * 1989-06-22 1995-09-13 International Business Machines Corporation Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung
US5189664A (en) * 1991-02-19 1993-02-23 Silicon Systems, Inc. Listener echo cancellation
FI915196A (fi) * 1991-11-04 1993-05-05 Nokia Telecommunications Oy Foerfarande foer konvergering av en ekoslaeckare i boerjan av ett samtal
US5359674A (en) * 1991-12-11 1994-10-25 David Sarnoff Research Center, Inc. Pyramid processor integrated circuit
WO1994014248A1 (en) * 1992-12-07 1994-06-23 Telstra Corporation Limited Far end echo canceller
US5896452A (en) * 1996-05-24 1999-04-20 Motorola, Inc. Multi-channel echo canceler and method using convolution of two training signals
US6185300B1 (en) * 1996-12-31 2001-02-06 Ericsson Inc. Echo canceler for use in communications system
US7164659B2 (en) * 1999-12-09 2007-01-16 Broadcom Corporation Adaptive gain control based on echo canceller performance information
US7251213B2 (en) 2002-09-17 2007-07-31 At&T Corp. Method for remote measurement of echo path delay
JP4734126B2 (ja) * 2005-03-23 2011-07-27 三洋電機株式会社 エコー防止回路、デジタル信号処理回路、エコー防止回路のフィルタ係数設定方法、デジタル信号処理回路のフィルタ係数設定方法、エコー防止回路のフィルタ係数を設定するためのプログラム、デジタル信号処理回路のフィルタ係数を設定するためのプログラム
JP4734127B2 (ja) * 2005-03-23 2011-07-27 三洋電機株式会社 エコー防止回路、デジタル信号処理回路、エコー防止回路のフィルタ係数設定方法、デジタル信号処理回路のフィルタ係数設定方法、エコー防止回路のフィルタ係数を設定するためのプログラム、デジタル信号処理回路のフィルタ係数を設定するためのプログラム
JP4771532B2 (ja) * 2006-02-01 2011-09-14 オンセミコンダクター・トレーディング・リミテッド エコー防止回路及びデジタル信号処理回路
JP4771311B2 (ja) * 2006-02-09 2011-09-14 オンセミコンダクター・トレーディング・リミテッド フィルタ係数設定装置、フィルタ係数設定方法、及びプログラム

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829012B2 (ja) * 1978-05-16 1983-06-20 ケイディディ株式会社 エコ−制御方式
NL8102225A (nl) * 1981-05-07 1982-12-01 Philips Nv Inrichting voor het compenseren van echosignalen.
US4464545A (en) * 1981-07-13 1984-08-07 Bell Telephone Laboratories, Incorporated Echo canceller
JPS5963827A (ja) * 1982-10-05 1984-04-11 Toshiba Corp エコ−・キヤンセラ−
FR2534427A1 (fr) * 1982-10-11 1984-04-13 Trt Telecom Radio Electr Annuleur d'echo pour signal de donnees en bande de base
US4669116A (en) * 1982-12-09 1987-05-26 Regents Of The University Of California Non-linear echo cancellation of data signals
FR2538975A1 (fr) * 1982-12-30 1984-07-06 Trt Telecom Radio Electr Procede utilise dans un dispositif d'annulation d'echo pour la mesure d'un retard d'echo et dispositif de mise en oeuvre de ce procede

Also Published As

Publication number Publication date
DE3783605D1 (de) 1993-02-25
US4887257A (en) 1989-12-12
EP0287742A1 (de) 1988-10-26
EP0287742B1 (de) 1993-01-13
JPS63274226A (ja) 1988-11-11

Similar Documents

Publication Publication Date Title
DE69014209D1 (de) Datenübertragungseinrichtung.
DE3782069D1 (de) Einrichtung fuer voll-duplex-datenuebertragung ueber zweidrahtschaltungen.
DE477080T1 (de) Datenuebertragungsgeraet.
NO885294L (no) Fleksibelt datakommunikasjonssystem.
DE3784942T2 (de) Duplex-datenuebertragung.
DE3789176D1 (de) Mikroprozessor zur Datentransferwiederholung.
NO913058D0 (no) Paalitelig overfoeringsenhet for detoneringsboelge.
DE68914328D1 (de) Überführungsvorrichtung.
DE68918616T2 (de) Bilddatenübertragungsgerät.
DE3872145D1 (de) Datenuebertragungsnetzwerk.
DE3783605T2 (de) Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung.
DE68924288T2 (de) Bilddatenübertragungsgerät.
DE69127771D1 (de) Datenübertragungssteuerungsvorrichtung
DE69233541D1 (de) Datenübertragungsgerät
DE3873647T2 (de) Zwischenuebertragungsgeraet.
DE3868508D1 (de) Uebergabevorrichtung.
DE3881574D1 (de) Vermittlungsverfahren fuer integrierte sprach/daten-uebertragung.
DE69029053T2 (de) Datenübertragungssteuerungsvorrichtung
DE3855984D1 (de) Datenübertragungsvorrichtung
DE3877290D1 (de) Geraet zur bilduebertragung.
DE3882425D1 (de) Datenuebertragungssteuerungsvorrichtung fuer direktspeicherzugriff.
DE68913319D1 (de) Bilddatenübertragungsgerät.
NO881842D0 (no) Fremgangsmaate og anordning for trykning av informasjon.
DE3581901D1 (de) Datenuebertragungsvorrichtung.
EP0437116A3 (en) Optical data transfer device

Legal Events

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