NO874684D0 - Ekkokansellerings-anordning. - Google Patents

Ekkokansellerings-anordning.

Info

Publication number
NO874684D0
NO874684D0 NO1987874684A NO874684A NO874684D0 NO 874684 D0 NO874684 D0 NO 874684D0 NO 1987874684 A NO1987874684 A NO 1987874684A NO 874684 A NO874684 A NO 874684A NO 874684 D0 NO874684 D0 NO 874684D0
Authority
NO
Norway
Prior art keywords
canceller
echo canceller
coefficients
measures
canceller device
Prior art date
Application number
NO1987874684A
Other languages
English (en)
Other versions
NO180137B (no
NO874684L (no
NO180137C (no
Inventor
Daniel Simon Gregoire Hoefkens
Joannes Hendrik Palm Spaenjers
Eduard Christiaan Mar Boeykens
Henri Albert Julia Verhille
Gustaaf Alfons Leon Geernaert
Original Assignee
Alcatel Nv
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
Priority claimed from BE2/61088A external-priority patent/BE905760A/fr
Application filed by Alcatel Nv filed Critical Alcatel Nv
Publication of NO874684D0 publication Critical patent/NO874684D0/no
Publication of NO874684L publication Critical patent/NO874684L/no
Publication of NO180137B publication Critical patent/NO180137B/no
Publication of NO180137C publication Critical patent/NO180137C/no

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
    • H04B3/238—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Optical Communication System (AREA)
  • Networks Using Active Elements (AREA)
  • Electrotherapy Devices (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Primary Cells (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Filters That Use Time-Delay Elements (AREA)
NO874684A 1986-11-17 1987-11-11 Ekkokansellerings-anlegg NO180137C (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2/61088A BE905760A (fr) 1986-11-16 1986-11-17 Compensateur d'echo reglable.

Publications (4)

Publication Number Publication Date
NO874684D0 true NO874684D0 (no) 1987-11-11
NO874684L NO874684L (no) 1988-05-18
NO180137B NO180137B (no) 1996-11-11
NO180137C NO180137C (no) 1997-02-19

Family

ID=3865839

Family Applications (1)

Application Number Title Priority Date Filing Date
NO874684A NO180137C (no) 1986-11-17 1987-11-11 Ekkokansellerings-anlegg

Country Status (9)

Country Link
US (1) US4862449A (no)
EP (1) EP0272714B1 (no)
JP (1) JPH0831779B2 (no)
CN (1) CN1014575B (no)
AT (1) ATE77719T1 (no)
DE (1) DE3780013T2 (no)
ES (1) ES2033814T3 (no)
NO (1) NO180137C (no)
YU (1) YU206887A (no)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0748681B2 (ja) * 1989-02-23 1995-05-24 日本電気株式会社 エコー消去器の係数制御方法
JPH04369932A (ja) * 1991-06-19 1992-12-22 Hitachi Ltd エコーキャンセラ、および、それを用いた伝送装置
DE4124834A1 (de) * 1991-07-26 1993-01-28 Telefunken Systemtechnik Verfahren zur signalverarbeitung
ES2038904B1 (es) * 1991-09-10 1995-01-16 Alcatel Standard Electrica Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.
JP2792311B2 (ja) * 1992-01-31 1998-09-03 日本電気株式会社 多チャンネルエコー除去方法および装置
US5404397A (en) * 1992-04-16 1995-04-04 U.S. Phillips Corporation Conference system with automatic speaker detection and speaker unit
JPH0669834A (ja) * 1992-08-24 1994-03-11 Mitsubishi Electric Corp ２線４線変換器
US5410595A (en) * 1992-11-12 1995-04-25 Motorola, Inc. Apparatus and method for noise reduction for a full-duplex speakerphone or the like
US5617423A (en) * 1993-01-08 1997-04-01 Multi-Tech Systems, Inc. Voice over data modem with selectable voice compression
US5546395A (en) * 1993-01-08 1996-08-13 Multi-Tech Systems, Inc. Dynamic selection of compression rate for a voice compression algorithm in a voice over data modem
US5864560A (en) * 1993-01-08 1999-01-26 Multi-Tech Systems, Inc. Method and apparatus for mode switching in a voice over data computer-based personal communications system
US5812534A (en) * 1993-01-08 1998-09-22 Multi-Tech Systems, Inc. Voice over data conferencing for a computer-based personal communications system
US5453986A (en) * 1993-01-08 1995-09-26 Multi-Tech Systems, Inc. Dual port interface for a computer-based multifunction personal communication system
US6009082A (en) * 1993-01-08 1999-12-28 Multi-Tech Systems, Inc. Computer-based multifunction personal communication system with caller ID
US5535204A (en) * 1993-01-08 1996-07-09 Multi-Tech Systems, Inc. Ringdown and ringback signalling for a computer-based multifunction personal communications system
US5754589A (en) * 1993-01-08 1998-05-19 Multi-Tech Systems, Inc. Noncompressed voice and data communication over modem for a computer-based multifunction personal communications system
US5452289A (en) * 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction personal communications system
FR2713417B1 (fr) * 1993-12-02 1996-02-02 Europ Agence Spatiale Procédé de réglage adaptatif d'un suppresseur d'écho.
US5757801A (en) 1994-04-19 1998-05-26 Multi-Tech Systems, Inc. Advanced priority statistical multiplexer
US5682386A (en) 1994-04-19 1997-10-28 Multi-Tech Systems, Inc. Data/voice/fax compression multiplexer
DE19548658A1 (de) * 1995-12-18 1997-06-19 Biotronik Mess & Therapieg Extrakorporales Kontrollgerät für ein implantierbares medizinisches Gerät
JP3097586B2 (ja) * 1997-03-06 2000-10-10 日本電気株式会社 信号検出器
US6256383B1 (en) * 1997-11-07 2001-07-03 Legerity, Inc. IIR filter of adaptive balance circuit for long tail echo cancellation
US6674856B1 (en) * 1999-09-23 2004-01-06 Agere Systems Inc. Placement of a transmit predistortion filter with respect to a data access arrangement
US7095720B1 (en) * 2001-10-17 2006-08-22 Sprint Communications Company L.P. Trunk level echo canceller test system
US6701335B2 (en) * 2002-02-27 2004-03-02 Lecroy Corporation Digital frequency response compensator and arbitrary response generator system
US6963643B1 (en) 2002-06-14 2005-11-08 Xilinx, Inc. Method and apparatus for canceling echo in a telephone communication system
CN1655468B (zh) * 2004-02-09 2010-05-05 瑞昱半导体股份有限公司 用于全双工通信系统的可调式回音消除装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632905A (en) * 1969-12-19 1972-01-04 Bell Telephone Labor Inc Method for improving the settling time of a transversal filter adaptive echo canceller
US3735055A (en) * 1971-11-05 1973-05-22 Bell Telephone Labor Inc Method for improving the settling time of a transversal filter adaptive echo canceller
JPS6046899B2 (ja) * 1980-09-26 1985-10-18 日本電気株式会社 反響消去装置
FR2517905B1 (fr) * 1981-12-09 1985-11-29 Telecommunications Sa Dispositif d'initialisation pour annuleur d'echo et son application aux echos lointains
DE3208214A1 (de) * 1982-03-06 1983-09-15 Standard Elektrik Lorenz Ag, 7000 Stuttgart Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen
JPS58204633A (ja) * 1982-05-24 1983-11-29 Toshiba Corp エコ−・キャンセラ
CA1186764A (en) * 1982-06-23 1985-05-07 Akira Kanemasa Echo canceler
EP0122594A3 (en) * 1983-04-18 1986-09-10 International Standard Electric Corporation Line circuit with echo compensation
BE897773A (nl) * 1983-09-19 1984-03-19 Bell Telephone Mfg Cy Pulse code modulatie omzetter
BE897772A (fr) * 1983-09-19 1984-03-19 Itt Ind Belgium Contacts electroniques et dispositifs associes
BE898960A (fr) * 1984-02-21 1984-08-21 Itt Ind Belgium Systeme de commutation applicable aux telecommunications
US4717848A (en) * 1984-09-13 1988-01-05 Alcatel N.V. Electronic circuits and signal generator using them
AU585337B2 (en) * 1985-04-26 1989-06-15 Alcatel N.V. An electronic switch

Also Published As

Publication number Publication date
YU206887A (en) 1991-04-30
JPH0831779B2 (ja) 1996-03-27
NO180137B (no) 1996-11-11
NO874684L (no) 1988-05-18
EP0272714B1 (en) 1992-06-24
ATE77719T1 (de) 1992-07-15
CN1031166A (zh) 1989-02-15
DE3780013D1 (de) 1992-07-30
EP0272714A1 (en) 1988-06-29
US4862449A (en) 1989-08-29
NO180137C (no) 1997-02-19
DE3780013T2 (de) 1993-01-21
CN1014575B (zh) 1991-10-30
JPS63313921A (ja) 1988-12-22
ES2033814T3 (es) 1993-04-01

Similar Documents

Publication Publication Date Title
NO874684L (no) Ekkokansellerings-anordning.
ATE230529T1 (de) Vorrichtung zum messen der signallaufzeit einer digitalen übertragungseinrichtung
RU94046114A (ru) Устройство для измерения давления
FR2437665A1 (fr) Interrupteur vocal
ATE83326T1 (de) Signalverarbeitungsgeraet mit pegelanpassungsschaltung.
IT1091286B (it) Procedimento e dispositivo per la trasmissione congiunta di segnali telefonici e segnali video su linee telefoniche numeriche
ATE139658T1 (de) Kommunikationsschnittstelle mit dezimierungsschaltkreis
IT1109609B (it) Eguali zatore autoadattivo particolarmente per la trasmissione di segnali numerici mediante circuiti telefonici
EP0122594A3 (en) Line circuit with echo compensation
IT7921131A0 (it) Disposizione circuitale per sistemi di telecomunicazioni atta a misurare il livello di massimo che presenta un segnale codificato disponibile all'uscita di un apparato di multiplazione.
ES8400842A1 (es) Una instalacion de telecomunicacion particularmente para comunicaciones telefonicas.
FI892097A0 (fi) Foerfarande och anordning foer att skydda ett dataoeverfoeringsnaet.
SU987827A1 (ru) Устройство дл измерени амплитудной характеристики канала св зи
FR2324181A1 (fr) Dispositif de detection de boucle d'une ligne d'abonne
SU786029A2 (ru) Устройство дл измерени параметров в каналах передачи данных
JPS57160253A (en) Measurement system for characteristics of switch-board
DE59410312D1 (de) Schaltungsanordnung zur Speisung einer Teilnehmeranschlussleitung
SU703833A1 (ru) Устройство дл суммировани сигналов
RO81786B1 (ro) Dispozitiv electronic pentru eliminarea semnalului perturbator
RU94018412A (ru) Устройство для дистанционного измерения и контроля параметров на различных объектах
JPS6436188A (en) Balance network setting system
ATE79710T1 (de) Schaltungsanordnung fuer den anschluss von anschlussleitungen eines digitalen zeitmultiplex- fernsprechnetzes.
JPS56122262A (en) Automatic test system for subscriber's line
KR860005408U (ko) 전화 자동 응답 장치의 링신호 약정회로
ATE81245T1 (de) Verfahren zur einstellung einer durchlassquote fuer in einer fernmeldeanlage eintreffende schaltereignisse.

Legal Events

Date Code Title Description
MM1K Lapsed by not paying the annual fees

Free format text: LAPSED IN MAY 2001