CA2279360C - Appareil et procede pour l'adaptation d'un annuleur d'echos dans un systeme de communication - Google Patents

Appareil et procede pour l'adaptation d'un annuleur d'echos dans un systeme de communication Download PDF

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Publication number
CA2279360C
CA2279360C CA002279360A CA2279360A CA2279360C CA 2279360 C CA2279360 C CA 2279360C CA 002279360 A CA002279360 A CA 002279360A CA 2279360 A CA2279360 A CA 2279360A CA 2279360 C CA2279360 C CA 2279360C
Authority
CA
Canada
Prior art keywords
canceller
modem
echo
echo canceller
far
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
CA002279360A
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English (en)
Other versions
CA2279360A1 (fr
Inventor
Lijun Tan
Hanyu Liu
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of CA2279360A1 publication Critical patent/CA2279360A1/fr
Application granted granted Critical
Publication of CA2279360C publication Critical patent/CA2279360C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H04B3/237—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Un appareil et un procédé pour l'adaptation d'un annuleur d'échos dans un système de communication, permettent de réduire le nombre de prises dans le filtre de l'annuleur d'échos, de sorte que la quantité de ressources de traitement utilisées par ledit annuleur soit réduite. Un annuleur d'échos de l'extrémité rapprochée (406) est invalidé si le modem (402) fonctionne du côté numérique d'une connexion numérique-analogique. Un annuleur d'échos de l'extrémité distante (408) est invalidé si le modem (402) fonctionne du côté analogique d'une connexion numérique-analogique ou si le temps de propagation aller-retour est situé au-dessous d'un seuil prédéterminé. L'annuleur d'échos de l'extrémité distante (408) est tronqué si l'intervalle couvert par l'annuleur d'échos de l'extrémité distante chevauche celui de l'annuleur de l'extrémité rapprochée (406).
CA002279360A 1997-12-12 1998-11-13 Appareil et procede pour l'adaptation d'un annuleur d'echos dans un systeme de communication Expired - Fee Related CA2279360C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US98969297A 1997-12-12 1997-12-12
US08/989,692 1997-12-12
PCT/US1998/024365 WO1999031866A1 (fr) 1997-12-12 1998-11-13 Appareil et procede pour l'adaptation d'un annuleur d'echos dans un systeme de communication

Publications (2)

Publication Number Publication Date
CA2279360A1 CA2279360A1 (fr) 1999-06-24
CA2279360C true CA2279360C (fr) 2002-10-22

Family

ID=25535373

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002279360A Expired - Fee Related CA2279360C (fr) 1997-12-12 1998-11-13 Appareil et procede pour l'adaptation d'un annuleur d'echos dans un systeme de communication

Country Status (7)

Country Link
EP (1) EP0960521A4 (fr)
CN (1) CN1247664A (fr)
AU (1) AU1411299A (fr)
BR (1) BR9807321A (fr)
CA (1) CA2279360C (fr)
ID (1) ID27681A (fr)
WO (1) WO1999031866A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107801235A (zh) * 2016-09-02 2018-03-13 马维尔国际贸易有限公司 通信系统中的回波或干扰消除功率节省管理系统和方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6480532B1 (en) * 1999-07-13 2002-11-12 Stmicroelectronics, Inc. Echo cancellation for an ADSL modem
EP1117191A1 (fr) * 2000-01-13 2001-07-18 Telefonaktiebolaget Lm Ericsson Méthode d'annulation d'écho
EP1286509A3 (fr) * 2001-08-21 2004-02-04 Siemens Aktiengesellschaft Procedé et dispositif pour compenser l' echo dans un résau de télécommunication
SE525053C2 (sv) * 2002-04-26 2004-11-16 Global Ip Sound Europ Ab Ekosläckning
WO2004006462A1 (fr) * 2002-07-02 2004-01-15 Siemens Aktiengesellschaft Desactivation, dependante de la duree de propagation, de la compensation d'echo dans un reseau a commutation par paquets
JP2007502054A (ja) 2003-08-07 2007-02-01 ケラン インコーポレイテッド クロストークキャンセルのための方法とシステム
US9509854B2 (en) 2004-10-13 2016-11-29 Koninklijke Philips N.V. Echo cancellation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
JPH0650829B2 (ja) * 1986-09-16 1994-06-29 日本電気株式会社 エコ−キヤンセラ方式モデム
US4970715A (en) * 1987-03-27 1990-11-13 Universal Data Systems, Inc. Modem with improved remote echo location and cancellation
US4995030A (en) * 1988-02-01 1991-02-19 Memotec Datacom, Inc. Far end echo cancellation method and apparatus
EP0403716B1 (fr) * 1989-06-22 1995-09-13 International Business Machines Corporation Dispositif d'annulation d'écho à ajustement des coefficients de l'annuleur d'écho pendant la transmission en duplex intégral
US5280473A (en) * 1990-02-08 1994-01-18 Universal Data Systems, Inc. Modem with echo cancellation
EP0543568A2 (fr) * 1991-11-22 1993-05-26 AT&T Corp. Filtrage à haute résolution utilisant des processeurs à basse résolution
US5353348A (en) * 1993-05-14 1994-10-04 Jrc International, Inc. Double echo cancelling system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107801235A (zh) * 2016-09-02 2018-03-13 马维尔国际贸易有限公司 通信系统中的回波或干扰消除功率节省管理系统和方法
CN107801235B (zh) * 2016-09-02 2022-03-18 马维尔亚洲私人有限公司 通信系统中的回波或干扰消除功率节省管理系统和方法

Also Published As

Publication number Publication date
ID27681A (id) 2001-04-19
CA2279360A1 (fr) 1999-06-24
EP0960521A4 (fr) 2004-08-04
CN1247664A (zh) 2000-03-15
EP0960521A1 (fr) 1999-12-01
BR9807321A (pt) 2000-04-18
AU1411299A (en) 1999-07-05
WO1999031866A1 (fr) 1999-06-24

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