DE3264337D1 - Digital echo canceller - Google Patents

Digital echo canceller

Info

Publication number
DE3264337D1
DE3264337D1 DE8282111852T DE3264337T DE3264337D1 DE 3264337 D1 DE3264337 D1 DE 3264337D1 DE 8282111852 T DE8282111852 T DE 8282111852T DE 3264337 T DE3264337 T DE 3264337T DE 3264337 D1 DE3264337 D1 DE 3264337D1
Authority
DE
Germany
Prior art keywords
echo canceller
digital echo
digital
canceller
echo
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
DE8282111852T
Other languages
German (de)
English (en)
Inventor
Bourlot Jean Le
Michel Levy
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.)
Alcatel CIT SA
Nokia Inc
Original Assignee
Compagnie Industrielle de Telecommunication CIT Alcatel SA
Nokia Inc
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 Compagnie Industrielle de Telecommunication CIT Alcatel SA, Nokia Inc filed Critical Compagnie Industrielle de Telecommunication CIT Alcatel SA
Application granted granted Critical
Publication of DE3264337D1 publication Critical patent/DE3264337D1/de
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
    • 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)
DE8282111852T 1981-12-23 1982-12-21 Digital echo canceller Expired DE3264337D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8124077A FR2518853A1 (fr) 1981-12-23 1981-12-23 Annuleur numerique d'echos

Publications (1)

Publication Number Publication Date
DE3264337D1 true DE3264337D1 (en) 1985-07-25

Family

ID=9265323

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282111852T Expired DE3264337D1 (en) 1981-12-23 1982-12-21 Digital echo canceller

Country Status (5)

Country Link
US (1) US4578543A (OSRAM)
EP (1) EP0082529B1 (OSRAM)
CA (1) CA1196434A (OSRAM)
DE (1) DE3264337D1 (OSRAM)
FR (1) FR2518853A1 (OSRAM)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2646210B2 (ja) * 1987-05-27 1997-08-27 ヤマハ株式会社 電気音響的残響支援装置
US5418849A (en) * 1988-12-21 1995-05-23 Siemens Telecomunicazioni S.P.A. Procedure and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics
US4969144A (en) * 1989-01-03 1990-11-06 Universal Data Systems, Inc. Adaptive passband echo canceller
CA2001277C (en) * 1989-10-24 1994-07-12 Bruce Leigh Townsend Hands free telecommunications apparatus and method
GB2240452A (en) * 1990-01-10 1991-07-31 Motorola Inc Echo canceller has plurality of sub-band channels each with its own adaptive filter
US5365583A (en) * 1992-07-02 1994-11-15 Polycom, Inc. Method for fail-safe operation in a speaker phone system
DE69330902T2 (de) * 1992-11-25 2002-06-20 Koninklijke Philips Electronics N.V., Eindhoven Echokompensator, Nachrichtenübertragungssystem und Station mit solch einem Echokompensator
JPH06232957A (ja) * 1993-01-29 1994-08-19 Toshiba Corp 音声通信装置
FR2742960B1 (fr) * 1995-12-22 1998-02-20 Mahieux Yannick Antenne acoustique pour station de travail informatique
US11107488B1 (en) * 2019-10-24 2021-08-31 Amazon Technologies, Inc. Reduced reference canceller

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732410A (en) * 1969-12-22 1973-05-08 Postmaster Department Res Labo Self adaptive filter and control circuit therefor
SE416367B (sv) * 1976-09-07 1980-12-15 Western Electric Co Ekoelimineringsanordning
NL7905577A (nl) * 1979-07-18 1981-01-20 Philips Nv Inrichting met een niet-recursieffilter.

Also Published As

Publication number Publication date
EP0082529A1 (fr) 1983-06-29
CA1196434A (fr) 1985-11-05
US4578543A (en) 1986-03-25
EP0082529B1 (fr) 1985-06-19
FR2518853B1 (OSRAM) 1984-04-06
FR2518853A1 (fr) 1983-06-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee