DK545682A - Initialiseringsanordning for ekkoannulator og dennes anvendelse til fjerne ekkoer - Google Patents

Initialiseringsanordning for ekkoannulator og dennes anvendelse til fjerne ekkoer Download PDF

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Publication number
DK545682A
DK545682A DK545682A DK545682A DK545682A DK 545682 A DK545682 A DK 545682A DK 545682 A DK545682 A DK 545682A DK 545682 A DK545682 A DK 545682A DK 545682 A DK545682 A DK 545682A
Authority
DK
Denmark
Prior art keywords
economulator
eco
remote
application
initialization device
Prior art date
Application number
DK545682A
Other languages
English (en)
Inventor
Jean-Marc Marie Colin Verdiere
Patrice Rene Langlois
Original Assignee
Telecommunications Sa
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 Sa filed Critical Telecommunications Sa
Publication of DK545682A publication Critical patent/DK545682A/da

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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
    • H04B3/238—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)
  • Hardware Redundancy (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Telephonic Communication Services (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Bidirectional Digital Transmission (AREA)
DK545682A 1981-12-09 1982-12-08 Initialiseringsanordning for ekkoannulator og dennes anvendelse til fjerne ekkoer DK545682A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8122984A FR2517905B1 (fr) 1981-12-09 1981-12-09 Dispositif d'initialisation pour annuleur d'echo et son application aux echos lointains

Publications (1)

Publication Number Publication Date
DK545682A true DK545682A (da) 1983-06-10

Family

ID=9264821

Family Applications (1)

Application Number Title Priority Date Filing Date
DK545682A DK545682A (da) 1981-12-09 1982-12-08 Initialiseringsanordning for ekkoannulator og dennes anvendelse til fjerne ekkoer

Country Status (12)

Country Link
US (1) US4578544A (da)
EP (1) EP0081437B1 (da)
JP (1) JPS58114534A (da)
CA (1) CA1208733A (da)
DE (1) DE3275799D1 (da)
DK (1) DK545682A (da)
ES (1) ES8308663A1 (da)
FI (1) FI74845C (da)
FR (1) FR2517905B1 (da)
HU (1) HU186186B (da)
NO (1) NO156628C (da)
SU (1) SU1308208A3 (da)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669116A (en) * 1982-12-09 1987-05-26 Regents Of The University Of California Non-linear echo cancellation of data signals
US4715064A (en) * 1984-06-22 1987-12-22 Ncr Corporation Adaptive hybrid circuit
GB8427165D0 (en) * 1984-10-26 1984-12-05 British Telecomm Adaptive recognising device
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
US4811342A (en) * 1985-11-12 1989-03-07 Racal Data Communications Inc. High speed analog echo canceller
US4805215A (en) * 1986-10-01 1989-02-14 Racal Data Communications Inc. Adaptive echo canceller with sparse dynamically positioned taps
WO1988002582A1 (en) * 1986-10-01 1988-04-07 Racal Data Communications Inc. Echo canceller with adaptive dynamically positioned taps
NO180137C (no) * 1986-11-17 1997-02-19 Alcatel Nv Ekkokansellerings-anlegg
US4813073A (en) * 1987-07-02 1989-03-14 Codex Corporation Echo cancellation
FR2618925B1 (fr) * 1987-07-30 1989-12-15 Rault Jean Dispositif de calcul numerique pour installation de transmission de donnees en code 2b 1q ou analogue
US5065242A (en) * 1990-06-29 1991-11-12 General Electric Company Deghosting apparatus using pseudorandom sequences
JPH0527019U (ja) * 1991-09-19 1993-04-06 俊子 阿曽 保冷帽子
FR2682252B1 (fr) * 1991-10-04 1995-11-03 Prescom Sarl Procede de traitement de signal et dispositif de prise et de restitution de son mettant en óoeuvre ce procede.
FR2713417B1 (fr) * 1993-12-02 1996-02-02 Europ Agence Spatiale Procédé de réglage adaptatif d'un suppresseur d'écho.
US5592548A (en) * 1995-05-31 1997-01-07 Qualcomm Incorporated System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
US5920548A (en) * 1996-10-01 1999-07-06 Telefonaktiebolaget L M Ericsson Echo path delay estimation
WO2002005555A1 (en) * 2000-07-11 2002-01-17 Samsung Electronics Co., Ltd. Repetitive-pn1023-sequence echo-cancellation reference signal for single-carrier digital television broadcast systems
RU2174738C1 (ru) * 2000-10-31 2001-10-10 ЗАО "НПО "Кросна" Способ групповой эхокомпенсации и групповой эхокомпенсатор
US20070112563A1 (en) * 2005-11-17 2007-05-17 Microsoft Corporation Determination of audio device quality
US7881460B2 (en) * 2005-11-17 2011-02-01 Microsoft Corporation Configuration of echo cancellation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2795865A (en) * 1954-03-29 1957-06-18 Backiel Mary Protective foot covering
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
US3795865A (en) * 1972-02-23 1974-03-05 Honeywell Inf Systems Automated real time equalized modem
FR2337465A1 (fr) * 1975-12-30 1977-07-29 Ibm France Procede et dispositif pour determiner les valeurs initiales des coefficients d'un egaliseur transversal complexe
IT1091970B (it) * 1977-01-17 1985-07-06 Trt Telecom Radio Electr Dispositivo digitale per la cancellazione di echi,per un modulatore/demodulatore,per la trasmissione di dati mediante modulazione di una portante
FR2460075B1 (fr) * 1979-06-22 1988-12-09 Cit Alcatel Annuleur d'echo adaptatif pour transmission de donnees en duplex
NL7905577A (nl) * 1979-07-18 1981-01-20 Philips Nv Inrichting met een niet-recursieffilter.
US4425483A (en) * 1981-10-13 1984-01-10 Northern Telecom Limited Echo cancellation using transversal filters

Also Published As

Publication number Publication date
FI74845B (fi) 1987-11-30
FR2517905B1 (fr) 1985-11-29
EP0081437B1 (fr) 1987-03-18
EP0081437A1 (fr) 1983-06-15
FI824217A0 (fi) 1982-12-08
ES517955A0 (es) 1983-09-16
FI824217L (fi) 1983-06-10
NO824130L (no) 1983-06-10
SU1308208A3 (ru) 1987-04-30
FI74845C (fi) 1988-03-10
NO156628C (no) 1987-10-21
DE3275799D1 (en) 1987-04-23
US4578544A (en) 1986-03-25
JPS58114534A (ja) 1983-07-07
FR2517905A1 (fr) 1983-06-10
NO156628B (no) 1987-07-13
HU186186B (en) 1985-06-28
ES8308663A1 (es) 1983-09-16
CA1208733A (en) 1986-07-29

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment