ES2033814T3 - Cancelador de eco ajustable. - Google Patents

Cancelador de eco ajustable.

Info

Publication number
ES2033814T3
ES2033814T3 ES198787202193T ES87202193T ES2033814T3 ES 2033814 T3 ES2033814 T3 ES 2033814T3 ES 198787202193 T ES198787202193 T ES 198787202193T ES 87202193 T ES87202193 T ES 87202193T ES 2033814 T3 ES2033814 T3 ES 2033814T3
Authority
ES
Spain
Prior art keywords
canceller
canceler
coefficients
measures
adjustable
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 - Lifetime
Application number
ES198787202193T
Other languages
English (en)
Inventor
Daniel Simon Gregoire Hoefkens
Gustaaf Alfons Leon Geernaert
Joannes Hendrik Palmyre Maria Spaenjers
Eduard Christiaan Maria Boeykens
Henri Albert Julia Verhille
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.)
Alcatel Lucent NV
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
Application granted granted Critical
Publication of ES2033814T3 publication Critical patent/ES2033814T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B3/238—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)
  • Filters That Use Time-Delay Elements (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Primary Cells (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Networks Using Active Elements (AREA)
  • Electrotherapy Devices (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

SE PRESENTA UN ANULADOR AJUSTABLE USADO EN UN SISTEMA DE COMUNICACION QUE INCLUYE UN FILTRO DIGITAL (DIH) LOS COEFICIENTES DEL CUAL (A0-A3,B) SE CALCULAN MEDIANTE PROGRAMAS DE SOFTWARE (PROG1-PROG4) DESPUES DE LA MEDIDA DE LAS SEÑALES. LA CONTRIBUCION DE ESTOS COEFICIENTES A LA SEÑAL DE SALIDA DEL ANULADOR SE MIDEN Y SE COMPARAN A MEDIDAS DE UNA SEÑAL DEL ECO OBTENIDA CUANDO EL FILTRO NO ESTA ACTIVO. ESTAS MEDIDAS SE REALIZAN DESDE LUGARES COMUNES A VARIOS CIRCUITOS DE COMUNICACION CADA UNO DE LOS CUALES INCLUYE UN ANULADOR.
ES198787202193T 1986-11-17 1987-11-11 Cancelador de eco ajustable. Expired - Lifetime ES2033814T3 (es)

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 (1)

Publication Number Publication Date
ES2033814T3 true ES2033814T3 (es) 1993-04-01

Family

ID=3865839

Family Applications (1)

Application Number Title Priority Date Filing Date
ES198787202193T Expired - Lifetime ES2033814T3 (es) 1986-11-17 1987-11-11 Cancelador de eco ajustable.

Country Status (9)

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

Families Citing this family (29)

* 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
US5453986A (en) * 1993-01-08 1995-09-26 Multi-Tech Systems, Inc. Dual port interface for a computer-based multifunction personal communication system
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
US5535204A (en) * 1993-01-08 1996-07-09 Multi-Tech Systems, Inc. Ringdown and ringback signalling for a computer-based multifunction personal communications system
US7082106B2 (en) 1993-01-08 2006-07-25 Multi-Tech Systems, Inc. Computer-based multi-media communications system and method
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
US5617423A (en) * 1993-01-08 1997-04-01 Multi-Tech Systems, Inc. Voice over data modem with selectable voice compression
US5812534A (en) * 1993-01-08 1998-09-22 Multi-Tech Systems, Inc. Voice over data conferencing for a computer-based personal communications system
US5452289A (en) * 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction personal communications system
US6009082A (en) * 1993-01-08 1999-12-28 Multi-Tech Systems, Inc. Computer-based multifunction personal communication system with caller ID
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
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
US4605826A (en) * 1982-06-23 1986-08-12 Nec Corporation Echo canceler with cascaded filter structure
EP0122594A3 (en) * 1983-04-18 1986-09-10 International Standard Electric Corporation Line circuit with echo compensation
DE3485702D1 (de) * 1983-09-19 1992-06-11 Alcatel Nv Elektronische kontakte und hinzugefuegte schaltungen.
BE897773A (nl) * 1983-09-19 1984-03-19 Bell Telephone Mfg Cy Pulse code modulatie omzetter
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
EP0272714A1 (en) 1988-06-29
JPH0831779B2 (ja) 1996-03-27
DE3780013T2 (de) 1993-01-21
ATE77719T1 (de) 1992-07-15
US4862449A (en) 1989-08-29
DE3780013D1 (de) 1992-07-30
NO180137C (no) 1997-02-19
JPS63313921A (ja) 1988-12-22
NO180137B (no) 1996-11-11
EP0272714B1 (en) 1992-06-24
NO874684D0 (no) 1987-11-11
NO874684L (no) 1988-05-18
CN1014575B (zh) 1991-10-30
CN1031166A (zh) 1989-02-15

Similar Documents

Publication Publication Date Title
ES2033814T3 (es) Cancelador de eco ajustable.
GB1514103A (en) Hybrid circuit
FR2353188A1 (fr) Systeme de raccordement a un reseau telephonique d'un equipement de communication accessoire
FR2437665A1 (fr) Interrupteur vocal
SE8400499D0 (sv) Digitalt impedansrele
ATE83326T1 (de) Signalverarbeitungsgeraet mit pegelanpassungsschaltung.
IT1091286B (it) Procedimento e dispositivo per la trasmissione congiunta di segnali telefonici e segnali video su linee telefoniche numeriche
FR2563957B1 (fr) Circuit telephonique, integrable monolithiquement, generateur de signaux de commande pour les indicateurs de taxation d'abonnes
SE9003661L (sv) Foerfarande och anordning foer att minska den erforderliga storleken hos ett digitalt filter i samband med ekoeliminering i en abonnentlinjekrets
EP0122594A3 (en) Line circuit with echo compensation
SE8203102L (sv) Adaptiv ekokompenseringsanordning for digital duplexkommunikation via tvatradsledningar
GB971802A (en) Signalling system for substation apparatus
EP0238972A3 (en) Call meter signal receiver for subscriber's private metering of telephone system
FI811037A7 (fi) Kytkentälaite puhelimentilaajan kaksijohtimista liitäntää varten kulloinkin lähtevien ja saapuvien sigsignaalien johtoon.
GB8802457D0 (en) Intermediate amplifier for use in two-wire connections of dial telephone network
JPS54130819A (en) Two-way variable gain amplifier
ES466570A1 (es) Un circuito para transmitir senales por una linea sujeta a sobretensiones transitorias.
JPS5728436A (en) Line coupler for power line carrier communication device
ATA131379A (de) Schaltungsanordnung zum verstaerken eines in einer aus einer teilnehmeranschlussleitung gespeisten endstelle einer fernmeldeanlage erzeugten signale
SU987827A1 (ru) Устройство дл измерени амплитудной характеристики канала св зи
SU801273A1 (ru) Устройство дл измерени оста-ТОчНОгО зАТуХАНи B зАН ТыХТЕлЕфОННыХ КАНАлАХ
JPS6436188A (en) Balance network setting system
RO81786B1 (ro) Dispozitiv electronic pentru eliminarea semnalului perturbator
JPS5632836A (en) Electronic hybrid circuit
JPS54163608A (en) Signal transmission system of digital telephone

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 272714

Country of ref document: ES