CA1181148A - Digital echo canceller - Google Patents

Digital echo canceller

Info

Publication number
CA1181148A
CA1181148A CA000385879A CA385879A CA1181148A CA 1181148 A CA1181148 A CA 1181148A CA 000385879 A CA000385879 A CA 000385879A CA 385879 A CA385879 A CA 385879A CA 1181148 A CA1181148 A CA 1181148A
Authority
CA
Canada
Prior art keywords
signal
echo
digital
echo canceller
residual
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
CA000385879A
Other languages
English (en)
French (fr)
Inventor
Michel Combier
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.)
Philips Communication Entreprise
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 CA1181148A publication Critical patent/CA1181148A/en
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CA000385879A 1980-09-19 1981-09-15 Digital echo canceller Expired CA1181148A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020251A FR2490901A1 (fr) 1980-09-19 1980-09-19 Annuleur d'echo numerique muni d'un convertisseur analogique-numerique a dynamique reglable
FR8020251 1980-09-19

Publications (1)

Publication Number Publication Date
CA1181148A true CA1181148A (en) 1985-01-15

Family

ID=9246120

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000385879A Expired CA1181148A (en) 1980-09-19 1981-09-15 Digital echo canceller

Country Status (7)

Country Link
US (1) US4549048A (https=)
EP (1) EP0048515B1 (https=)
JP (1) JPS5783936A (https=)
AU (1) AU548564B2 (https=)
CA (1) CA1181148A (https=)
DE (1) DE3162893D1 (https=)
FR (1) FR2490901A1 (https=)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5912639A (ja) * 1982-07-12 1984-01-23 Toshiba Corp エコ−キヤンセラ
FR2534427A1 (fr) * 1982-10-11 1984-04-13 Trt Telecom Radio Electr Annuleur d'echo pour signal de donnees en bande de base
FR2534754A1 (fr) * 1982-10-15 1984-04-20 Trt Telecom Radio Electr Recepteur pour modem de transmission de donnees, comportant un annuleur d'echo et un egaliseur
LU85402A1 (de) * 1983-12-01 1984-09-11 Siemens Ag Verfahren und schaltungsanordnung zur kompensation von uebersprech-u./o.echosignalen
US4747132A (en) * 1984-04-09 1988-05-24 Matsushita Electric Industrial Co., Ltd. Howling canceller
US4610010A (en) * 1984-12-10 1986-09-02 Ncr Corporation Control circuit for an adaptive hybrid control in a local area network
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
US4989221A (en) * 1987-03-30 1991-01-29 Codex Corporation Sample rate converter
GB8719307D0 (en) * 1987-08-14 1987-09-23 Gen Electric Co Plc Echo canceller
EP0313706B1 (en) * 1987-10-30 1992-04-29 International Business Machines Corporation Analog-to-digital and digital-to-analog conversion system and echo cancellation device including the same
CA1336342C (en) * 1988-01-21 1995-07-18 Richard B. Kline Multiple-mode modem with digital filtering
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
US7702004B2 (en) * 2002-12-09 2010-04-20 Alexander Roger Deas Simultaneous bidirectional differential signalling interface

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836734A (en) * 1971-12-03 1974-09-17 Communications Satellite Corp Adaptive echo canceller with multi-increment gain coefficient corrections
JPS5218132A (en) * 1975-08-01 1977-02-10 Hitachi Ltd Binary circuit
FR2358790A1 (fr) * 1976-07-13 1978-02-10 Trt Telecom Radio Electr Annuleur d'echo auto-adaptatif pour transmission de donnees en bande de base
FR2377734A1 (fr) * 1977-01-17 1978-08-11 Trt Telecom Radio Electr Annuleur d'echo numerique pour modem de transmission de donnees par modulation d'une porteuse
US4113997A (en) * 1977-07-12 1978-09-12 Communications Satellite, Corporation Analog to digital signal of logarithmic format converter and analog to pseudo-rms value converter and echo canceller utilizing same
US4268727A (en) * 1979-03-14 1981-05-19 International Telephone And Telegraph Corporation Adaptive digital echo cancellation circuit
NL7902053A (nl) * 1979-03-15 1980-09-17 Philips Nv Echocompensator voor homochrone data overdrachtssyste- men.
NL7903759A (nl) * 1979-05-14 1980-11-18 Philips Nv Echocompensator met hoogdoorlaatfilter.

Also Published As

Publication number Publication date
FR2490901A1 (fr) 1982-03-26
DE3162893D1 (en) 1984-05-03
JPH0142533B2 (https=) 1989-09-13
EP0048515B1 (fr) 1984-03-28
AU548564B2 (en) 1985-12-19
FR2490901B1 (https=) 1984-02-10
US4549048A (en) 1985-10-22
EP0048515A1 (fr) 1982-03-31
JPS5783936A (en) 1982-05-26
AU7543481A (en) 1982-03-25

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Legal Events

Date Code Title Description
MKEX Expiry