NO180137C - Ekkokansellerings-anlegg - Google Patents

Ekkokansellerings-anlegg

Info

Publication number
NO180137C
NO180137C NO874684A NO874684A NO180137C NO 180137 C NO180137 C NO 180137C NO 874684 A NO874684 A NO 874684A NO 874684 A NO874684 A NO 874684A NO 180137 C NO180137 C NO 180137C
Authority
NO
Norway
Prior art keywords
canceller
construction
coefficients
measures
echo canceling
Prior art date
Application number
NO874684A
Other languages
English (en)
Norwegian (no)
Other versions
NO180137B (no
NO874684L (no
NO874684D0 (no
Inventor
Daniel S G Hoefkens
Joannes H P M Spaenjers
Eduard C M Boeykens
Henri A J Verhille
Gustaaf A L 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 NO874684D0 (no) 1987-11-11
NO874684L NO874684L (no) 1988-05-18
NO180137B NO180137B (no) 1996-11-11
NO180137C true 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 (de)
EP (1) EP0272714B1 (de)
JP (1) JPH0831779B2 (de)
CN (1) CN1014575B (de)
AT (1) ATE77719T1 (de)
DE (1) DE3780013T2 (de)
ES (1) ES2033814T3 (de)
NO (1) NO180137C (de)
YU (1) YU206887A (de)

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
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
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
US5812534A (en) * 1993-01-08 1998-09-22 Multi-Tech Systems, Inc. Voice over data conferencing for a computer-based personal communications 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
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
US5452289A (en) * 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction 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
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 (de) * 1983-04-18 1986-09-10 International Standard Electric Corporation Leitungsschaltung mit Echokompensation
BE897772A (fr) * 1983-09-19 1984-03-19 Itt Ind Belgium Contacts electroniques et dispositifs associes
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
NO180137B (no) 1996-11-11
NO874684L (no) 1988-05-18
JPS63313921A (ja) 1988-12-22
CN1014575B (zh) 1991-10-30
EP0272714A1 (de) 1988-06-29
JPH0831779B2 (ja) 1996-03-27
US4862449A (en) 1989-08-29
EP0272714B1 (de) 1992-06-24
ES2033814T3 (es) 1993-04-01
NO874684D0 (no) 1987-11-11
DE3780013D1 (de) 1992-07-30
DE3780013T2 (de) 1993-01-21
CN1031166A (zh) 1989-02-15
ATE77719T1 (de) 1992-07-15

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Legal Events

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

Free format text: LAPSED IN MAY 2001