DE68917502D1 - Echokompensator für Echosignale mit veränderlicher Phase. - Google Patents

Echokompensator für Echosignale mit veränderlicher Phase.

Info

Publication number
DE68917502D1
DE68917502D1 DE68917502T DE68917502T DE68917502D1 DE 68917502 D1 DE68917502 D1 DE 68917502D1 DE 68917502 T DE68917502 T DE 68917502T DE 68917502 T DE68917502 T DE 68917502T DE 68917502 D1 DE68917502 D1 DE 68917502D1
Authority
DE
Germany
Prior art keywords
echo
variable phase
canceller
signals
echo signals
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
DE68917502T
Other languages
English (en)
Other versions
DE68917502T2 (de
Inventor
Bertrand Salle
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 DE68917502D1 publication Critical patent/DE68917502D1/de
Publication of DE68917502T2 publication Critical patent/DE68917502T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04B3/232—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
    • 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)
DE68917502T 1988-03-25 1989-03-20 Echokompensator für Echosignale mit veränderlicher Phase. Expired - Fee Related DE68917502T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8803938A FR2629293A1 (fr) 1988-03-25 1988-03-25 Annuleur d'echo pour signal d'echo a phase variable

Publications (2)

Publication Number Publication Date
DE68917502D1 true DE68917502D1 (de) 1994-09-22
DE68917502T2 DE68917502T2 (de) 1995-03-23

Family

ID=9364642

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68917502T Expired - Fee Related DE68917502T2 (de) 1988-03-25 1989-03-20 Echokompensator für Echosignale mit veränderlicher Phase.

Country Status (5)

Country Link
US (1) US4965786A (de)
EP (1) EP0334442B1 (de)
JP (1) JPH0211026A (de)
DE (1) DE68917502T2 (de)
FR (1) FR2629293A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388092A (en) * 1989-06-27 1995-02-07 Nec Corporation Echo canceller for two-wire full duplex digital data transmission
FR2682251B1 (fr) * 1991-10-02 1997-04-25 Prescom Sarl Procede et systeme de prise de son, et appareil de prise et de restitution de son.
IT1254819B (it) * 1992-02-24 1995-10-11 Sits Soc It Telecom Siemens Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici non stazionari
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.
US6826390B1 (en) * 1999-07-14 2004-11-30 Fujitsu Limited Receiver, transceiver circuit, signal transmission method, and signal transmission system
TWI424696B (zh) * 2010-11-29 2014-01-21 Realtek Semiconductor Corp 抵消信號之時間關聯性的通訊系統與方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072830A (en) * 1976-10-04 1978-02-07 Bell Telephone Laboratories, Incorporated Variable phase shifter for adaptive echo cancellers
NL7903759A (nl) * 1979-05-14 1980-11-18 Philips Nv Echocompensator met hoogdoorlaatfilter.
FR2479617A1 (fr) * 1980-03-26 1981-10-02 Trt Telecom Radio Electr Annuleur d'echo pour signal d'echo a phase variable
DE3068299D1 (en) * 1980-06-16 1984-07-26 Tokyo Shibaura Electric Co Automatic equalizer
EP0270706B1 (de) * 1982-06-14 1993-03-24 Telecommunications Radioelectriques Et Telephoniques T.R.T. Verfahren zum Vermindern der Konvergenzzeit eines Echokompensators
GB2159376B (en) * 1984-05-22 1987-08-26 Emi Ltd An echo cancelling system
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
US4682358A (en) * 1984-12-04 1987-07-21 American Telephone And Telegraph Company Echo canceller

Also Published As

Publication number Publication date
EP0334442B1 (de) 1994-08-17
US4965786A (en) 1990-10-23
DE68917502T2 (de) 1995-03-23
EP0334442A1 (de) 1989-09-27
JPH0211026A (ja) 1990-01-16
FR2629293A1 (fr) 1989-09-29

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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