YU206887A - Process for determining coefficients of echo remover's digital filter - Google Patents

Process for determining coefficients of echo remover's digital filter

Info

Publication number
YU206887A
YU206887A YU02068/87A YU206887A YU206887A YU 206887 A YU206887 A YU 206887A YU 02068/87 A YU02068/87 A YU 02068/87A YU 206887 A YU206887 A YU 206887A YU 206887 A YU206887 A YU 206887A
Authority
YU
Yugoslavia
Prior art keywords
digital filter
coefficients
canceller
determining coefficients
echo
Prior art date
Application number
YU02068/87A
Other languages
English (en)
Inventor
D S G Hoefkens
J H P M Spaenjers
E C M Boeykens
H A J Verhille
G 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 YU206887A publication Critical patent/YU206887A/xx

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)
  • 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)
YU02068/87A 1986-11-17 1987-11-16 Process for determining coefficients of echo remover's digital filter YU206887A (en)

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
YU206887A true YU206887A (en) 1991-04-30

Family

ID=3865839

Family Applications (1)

Application Number Title Priority Date Filing Date
YU02068/87A YU206887A (en) 1986-11-17 1987-11-16 Process for determining coefficients of echo remover's digital filter

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
US5617423A (en) * 1993-01-08 1997-04-01 Multi-Tech Systems, Inc. Voice over data modem with selectable voice compression
US5452289A (en) * 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction personal communications 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
US6009082A (en) * 1993-01-08 1999-12-28 Multi-Tech Systems, Inc. Computer-based multifunction personal communication system with caller ID
US5453986A (en) * 1993-01-08 1995-09-26 Multi-Tech Systems, Inc. Dual port interface for a computer-based multifunction personal communication system
US5812534A (en) * 1993-01-08 1998-09-22 Multi-Tech Systems, Inc. Voice over data conferencing for a computer-based personal communications system
US5535204A (en) * 1993-01-08 1996-07-09 Multi-Tech Systems, Inc. Ringdown and ringback signalling for a computer-based multifunction personal communications system
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
FR2713417B1 (fr) * 1993-12-02 1996-02-02 Europ Agence Spatiale Procédé de réglage adaptatif d'un suppresseur d'écho.
US5682386A (en) 1994-04-19 1997-10-28 Multi-Tech Systems, Inc. Data/voice/fax compression multiplexer
US5757801A (en) 1994-04-19 1998-05-26 Multi-Tech Systems, Inc. Advanced priority statistical 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
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
ES2033814T3 (es) 1993-04-01
JPS63313921A (ja) 1988-12-22
CN1014575B (zh) 1991-10-30
NO874684L (no) 1988-05-18
US4862449A (en) 1989-08-29
NO180137C (no) 1997-02-19
DE3780013D1 (de) 1992-07-30
NO180137B (no) 1996-11-11
JPH0831779B2 (ja) 1996-03-27
CN1031166A (zh) 1989-02-15
DE3780013T2 (de) 1993-01-21
EP0272714B1 (de) 1992-06-24
NO874684D0 (no) 1987-11-11
ATE77719T1 (de) 1992-07-15
EP0272714A1 (de) 1988-06-29

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