DE3379766D1 - Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method - Google Patents

Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method

Info

Publication number
DE3379766D1
DE3379766D1 DE8383200837T DE3379766T DE3379766D1 DE 3379766 D1 DE3379766 D1 DE 3379766D1 DE 8383200837 T DE8383200837 T DE 8383200837T DE 3379766 T DE3379766 T DE 3379766T DE 3379766 D1 DE3379766 D1 DE 3379766D1
Authority
DE
Germany
Prior art keywords
reducing
carrying
echo canceller
convergence time
convergence
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
DE8383200837T
Other languages
German (de)
English (en)
Inventor
Loic Bernard Yves Guidoux
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.)
SIGNAUX PARIS FR Cie
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Application granted granted Critical
Publication of DE3379766D1 publication Critical patent/DE3379766D1/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
    • H04B3/238—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
    • 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)
  • Bidirectional Digital Transmission (AREA)
DE8383200837T 1982-06-14 1983-06-09 Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method Expired DE3379766D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8210310A FR2528643A1 (fr) 1982-06-14 1982-06-14 Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede

Publications (1)

Publication Number Publication Date
DE3379766D1 true DE3379766D1 (en) 1989-06-01

Family

ID=9274960

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8383200837T Expired DE3379766D1 (en) 1982-06-14 1983-06-09 Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method
DE86202106T Expired - Fee Related DE3382669T2 (de) 1982-06-14 1983-06-09 Verfahren zum Vermindern der Konvergenzzeit eines Echokompensators.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE86202106T Expired - Fee Related DE3382669T2 (de) 1982-06-14 1983-06-09 Verfahren zum Vermindern der Konvergenzzeit eines Echokompensators.

Country Status (7)

Country Link
US (1) US4621173A (enExample)
EP (1) EP0096936B1 (enExample)
JP (2) JPH0714137B2 (enExample)
AU (1) AU570635B2 (enExample)
CA (1) CA1194165A (enExample)
DE (2) DE3379766D1 (enExample)
FR (1) FR2528643A1 (enExample)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528643A1 (fr) * 1982-06-14 1983-12-16 Trt Telecom Radio Electr Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede
FR2541837A1 (fr) * 1983-02-25 1984-08-31 Trt Telecom Radio Electr Procede de reduction du temps de convergence d'un annuleur d'echo et dispositif pour mettre en oeuvre ce procede
EP0130263B1 (fr) * 1983-06-30 1988-06-01 International Business Machines Corporation Procédé d'initialisation d'un filtre annuleur d'écho et système de communication utilisant ledit procédé
EP0167677B1 (en) * 1984-07-13 1989-03-08 BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap Signal processing arrangement
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
EP0239293A3 (en) * 1986-03-24 1988-12-14 Gpt Limited Data transmission systems
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
AU606176B2 (en) * 1987-07-13 1991-01-31 Alcatel Australia Limited Programmable balance filter arrangement
CA1338218C (en) * 1988-03-17 1996-04-02 Yoshinori Tanaka Echo canceller
CA1315356C (en) * 1988-07-20 1993-03-30 Seiji Miyoshi Digital adaptive filter and method of convergence therein
US4987569A (en) * 1989-04-05 1991-01-22 Codex Corporation Fast training echo canceller
JP2785336B2 (ja) * 1989-06-13 1998-08-13 日本電気株式会社 音響エコーキャンセラのトレーニング方式
FR2710210A1 (fr) * 1993-09-13 1995-03-24 Trt Telecom Radio Electr Procédé pour la mise en route d'un modem comportant un annuleur d'écho à phase variable et modem dans lequel un tel procédé est mis en Óoeuvre.
DE69533375T2 (de) * 1994-05-06 2005-07-28 Ntt Docomo Inc. Echokompensator und Echopfadschätzungsverfahren
CN1558563B (zh) * 1994-05-07 2011-04-20 株式会社Ntt都科摩 回波消除器及其所使用的学习方法
JP2778513B2 (ja) * 1995-04-14 1998-07-23 日本電気株式会社 エコーキャンセラ装置
US5909426A (en) * 1997-03-31 1999-06-01 Rockwell Science Center, Inc. Orthogonal LMS algorithms for fast line echo canceler training
WO1999067736A1 (de) * 1998-06-20 1999-12-29 Koninklijke Philips Electronics N.V. Verfahren zum auswerten eines eingangsdatensignals und schaltungsanordnung zur durchführung des verfahrens
US6560332B1 (en) * 1999-05-18 2003-05-06 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for improving echo suppression in bi-directional communications systems
US7062039B1 (en) * 1999-05-27 2006-06-13 Telefonaktiebolaget Lm Ericsson Methods and apparatus for improving adaptive filter performance by inclusion of inaudible information
EP1273163A1 (en) * 2000-03-29 2003-01-08 Surf Communication Solutions, Ltd. V.90 over all-digital connections
US7548599B2 (en) * 2003-01-28 2009-06-16 Agere Systems Inc. Method and apparatus for reducing cross-talk with reduced redundancies
FI20030777A0 (fi) * 2003-05-22 2003-05-22 Nokia Corp Lähetysdiversiteetin kertaluvun ja lähetyshaarojen määritys
JP4591102B2 (ja) * 2005-02-04 2010-12-01 パナソニック株式会社 エコーキャンセラおよびそれを用いたハンズフリー電話とエコーキャンセル方法
JP2008547363A (ja) * 2005-07-04 2008-12-25 フリースケール セミコンダクター インコーポレイテッド マルチモード送信器におけるプライミングされたｆｉｒフィルタを用いたランピング
EP1955509A4 (en) 2005-11-28 2011-07-06 Lg Electronics Inc METHOD AND DEVICE FOR PRODUCING AND TRANSMITTING A CODE SEQUENCE IN A WIRELESS COMMUNICATION SYSTEM
US8126161B2 (en) * 2006-11-02 2012-02-28 Hitachi, Ltd. Acoustic echo canceller system
JP5658127B2 (ja) * 2011-11-18 2015-01-21 日本電信電話株式会社 無線通信装置、無線通信方法及び無線通信プログラム

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1108415A (en) * 1966-05-06 1968-04-03 Int Standard Electric Corp Echo suppression in long distance telephone circuits
US4047013A (en) * 1975-07-09 1977-09-06 International Business Machines Corporation Method and apparatus for fast determination of initial transversal equalizer coefficient values
GB2008903B (en) * 1977-08-17 1982-06-30 Gen Electric Co Ltd Amplifier arrangements
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.
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
FR2487144B1 (fr) * 1980-07-21 1986-10-24 Trt Telecom Radio Electr Dispositif d'annulation d'un signal d'echo composite
US4430743A (en) * 1980-11-17 1984-02-07 Nippon Electric Co., Ltd. Fast start-up system for transversal equalizers
FR2528643A1 (fr) * 1982-06-14 1983-12-16 Trt Telecom Radio Electr Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede
US4621123A (en) * 1984-12-20 1986-11-04 Sumitomo Chemical Company, Limited Phosphinylmethyl polypenols and polyglycidyl ethers thereof

Also Published As

Publication number Publication date
JP2538173B2 (ja) 1996-09-25
JPH0653864A (ja) 1994-02-25
FR2528643A1 (fr) 1983-12-16
AU570635B2 (en) 1988-03-24
EP0096936A1 (fr) 1983-12-28
FR2528643B1 (enExample) 1984-11-23
JPH0714137B2 (ja) 1995-02-15
US4621173A (en) 1986-11-04
DE3382669T2 (de) 1993-09-30
DE3382669D1 (de) 1993-04-29
AU1574183A (en) 1983-12-22
EP0096936B1 (fr) 1989-04-26
CA1194165A (en) 1985-09-24
JPS594337A (ja) 1984-01-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: COMPAGNIE DES SIGNAUX, PARIS, FR

8328 Change in the person/name/address of the agent

Free format text: GRUENECKER, KINKELDEY, STOCKMAIR & SCHWANHAEUSSER, ANWALTSSOZIETAET, 80538 MUENCHEN

8339 Ceased/non-payment of the annual fee