DE3478176D1 - Method and apparatus for cancelling echo - Google Patents

Method and apparatus for cancelling echo

Info

Publication number
DE3478176D1
DE3478176D1 DE8484115339T DE3478176T DE3478176D1 DE 3478176 D1 DE3478176 D1 DE 3478176D1 DE 8484115339 T DE8484115339 T DE 8484115339T DE 3478176 T DE3478176 T DE 3478176T DE 3478176 D1 DE3478176 D1 DE 3478176D1
Authority
DE
Germany
Prior art keywords
cancelling echo
cancelling
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
DE8484115339T
Other languages
English (en)
Inventor
Akira Kanemasa
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.)
NEC Corp
Original Assignee
NEC Corp
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 JP23673483A external-priority patent/JPS60127824A/ja
Priority claimed from JP23673683A external-priority patent/JPS60127825A/ja
Application filed by NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3478176D1 publication Critical patent/DE3478176D1/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)
  • Filters That Use Time-Delay Elements (AREA)
DE8484115339T 1983-12-15 1984-12-13 Method and apparatus for cancelling echo Expired DE3478176D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP23673483A JPS60127824A (ja) 1983-12-15 1983-12-15 エコ−除去方法及び装置
JP23673683A JPS60127825A (ja) 1983-12-15 1983-12-15 エコ−除去方法及び装置

Publications (1)

Publication Number Publication Date
DE3478176D1 true DE3478176D1 (en) 1989-06-15

Family

ID=26532824

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484115339T Expired DE3478176D1 (en) 1983-12-15 1984-12-13 Method and apparatus for cancelling echo

Country Status (4)

Country Link
US (1) US4707824A (de)
EP (1) EP0145022B1 (de)
CA (1) CA1225130A (de)
DE (1) DE3478176D1 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8600816A (nl) * 1986-03-28 1987-10-16 At & T & Philips Telecomm Adaptief transversaal filter.
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
EP0309888B1 (de) * 1987-09-30 1993-03-31 Siemens Aktiengesellschaft Verfahren und Schaltungsanordnung zur Erzeugung von Filtersignalen
US5225836A (en) * 1988-03-23 1993-07-06 Central Institute For The Deaf Electronic filters, repeated signal charge conversion apparatus, hearing aids and methods
US5016280A (en) * 1988-03-23 1991-05-14 Central Institute For The Deaf Electronic filters, hearing aids and methods
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
DE69015193T2 (de) * 1989-05-12 1995-05-04 Gpt Ltd Schaltung zur audiosignalverarbeitung.
FR2651077B1 (fr) * 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
GB2237483A (en) * 1989-10-11 1991-05-01 Plessey Co Plc An adaptive fir filter having restricted coefficient ranges
US5206854A (en) * 1991-09-24 1993-04-27 At&T Bell Laboratories Detecting loss of echo cancellation
US5852661A (en) * 1995-02-17 1998-12-22 Advanced Micro Devices, Inc. Adaptive echo cancellation used with echo suppression to reduce short and long duration echoes
US5825753A (en) * 1995-09-29 1998-10-20 Paradyne Corporation Echo canceler gain tracker for cellular modems
US6185300B1 (en) * 1996-12-31 2001-02-06 Ericsson Inc. Echo canceler for use in communications system
US6181791B1 (en) * 1998-01-06 2001-01-30 Stmicroelectronics, Inc. Apparatus and method for reducing local interference in subscriber loop communication system
US6973146B1 (en) * 2000-08-29 2005-12-06 Lucent Technologies Inc. Resampler for a bit pump and method of resampling a signal associated therewith
US6970511B1 (en) 2000-08-29 2005-11-29 Lucent Technologies Inc. Interpolator, a resampler employing the interpolator and method of interpolating a signal associated therewith
US6894989B1 (en) * 2000-08-29 2005-05-17 Agere Systems Inc. Separation circuit for an echo canceling system and method of operating the same
US6983047B1 (en) 2000-08-29 2006-01-03 Lucent Technologies Inc. Echo canceling system for a bit pump and method of operating the same
US6876699B1 (en) 2000-08-29 2005-04-05 Lucent Technologies Inc. Filter circuit for a bit pump and method of configuring the same
US6985550B2 (en) * 2001-04-30 2006-01-10 Agere Systems Inc. Jitter control processor and a transceiver employing the same
US6942272B2 (en) * 2003-08-29 2005-09-13 Thomas John Livingston Tailgate step
US8005023B2 (en) * 2007-06-14 2011-08-23 Microsoft Corporation Client-side echo cancellation for multi-party audio conferencing
WO2015178932A1 (en) * 2014-05-23 2015-11-26 Intel Corporation Blind technique for weight selection in simultaneous transmit and receive structure
CN113259285B (zh) * 2021-07-14 2021-11-23 北京国科天迅科技有限公司 一种有源接收电路、接收方法、设备及可存储介质

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787645A (en) * 1971-05-19 1974-01-22 Nippon Electric Co Echo canceller having two echo path models
FR2272544B1 (de) * 1974-05-24 1977-03-11 Cit Alcatel
NL7902053A (nl) * 1979-03-15 1980-09-17 Philips Nv Echocompensator voor homochrone data overdrachtssyste- men.
DE2944686C2 (de) * 1979-11-06 1982-05-13 Standard Elektrik Lorenz Ag, 7000 Stuttgart Einrichtung mit einer Gabelschaltung
WO1982003144A1 (en) * 1981-03-05 1982-09-16 Western Electric Co Energy band discriminator
SE426764B (sv) * 1981-11-02 1983-02-07 Ellemtel Utvecklings Ab Forfarande att astadkomma adaptiv ekoeliminering vid overforing av digital information i duplex jemte anordning for utforande av forfarandet
DE3208214A1 (de) * 1982-03-06 1983-09-15 Standard Elektrik Lorenz Ag, 7000 Stuttgart Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen
FR2528642B1 (fr) * 1982-06-11 1985-10-25 Cit Alcatel Annuleur d'echo pour transmission de donnees
US4621172A (en) * 1982-12-22 1986-11-04 Nec Corporation Fast convergence method and system for echo canceller

Also Published As

Publication number Publication date
EP0145022B1 (de) 1989-05-10
CA1225130A (en) 1987-08-04
US4707824A (en) 1987-11-17
EP0145022A3 (en) 1986-10-08
EP0145022A2 (de) 1985-06-19

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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