DE3874997D1 - Echokompensator. - Google Patents

Echokompensator.

Info

Publication number
DE3874997D1
DE3874997D1 DE8888111605T DE3874997T DE3874997D1 DE 3874997 D1 DE3874997 D1 DE 3874997D1 DE 8888111605 T DE8888111605 T DE 8888111605T DE 3874997 T DE3874997 T DE 3874997T DE 3874997 D1 DE3874997 D1 DE 3874997D1
Authority
DE
Germany
Prior art keywords
echo compensator
compensator
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 - Lifetime
Application number
DE8888111605T
Other languages
English (en)
Other versions
DE3874997T2 (de
Inventor
Fujio C O Nec Corpora Nakagawa
Akira C O Nec Corpora 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 JP18189687A external-priority patent/JPS6424519A/ja
Priority claimed from JP28133287A external-priority patent/JPH0752860B2/ja
Priority claimed from JP28133087A external-priority patent/JPH01123533A/ja
Application filed by NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3874997D1 publication Critical patent/DE3874997D1/de
Publication of DE3874997T2 publication Critical patent/DE3874997T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B3/237—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 two adaptive filters, e.g. for near end and for end echo cancelling
    • 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)
DE8888111605T 1987-07-20 1988-07-19 Echokompensator. Expired - Lifetime DE3874997T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP18189687A JPS6424519A (en) 1987-07-20 1987-07-20 Echo signal removing device
JP28133287A JPH0752860B2 (ja) 1987-11-06 1987-11-06 エコー除去装置
JP28133087A JPH01123533A (ja) 1987-11-06 1987-11-06 エコー除去装置

Publications (2)

Publication Number Publication Date
DE3874997D1 true DE3874997D1 (de) 1992-11-05
DE3874997T2 DE3874997T2 (de) 1993-03-25

Family

ID=27325090

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8888111605T Expired - Lifetime DE3874997T2 (de) 1987-07-20 1988-07-19 Echokompensator.

Country Status (5)

Country Link
US (1) US4972467A (de)
EP (1) EP0300427B1 (de)
AU (1) AU604137B2 (de)
CA (1) CA1317354C (de)
DE (1) DE3874997T2 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0752859B2 (ja) * 1987-11-06 1995-06-05 日本電気株式会社 エコー除去装置
JPH0773238B2 (ja) * 1989-04-18 1995-08-02 日本電気株式会社 ２線４線変換回路
JP2836277B2 (ja) * 1991-03-14 1998-12-14 国際電信電話株式会社 エコーキャンセル装置
US5353279A (en) * 1991-08-29 1994-10-04 Nec Corporation Echo canceler
SE501248C2 (sv) * 1993-05-14 1994-12-19 Ericsson Telefon Ab L M Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter
JP3336126B2 (ja) * 1994-09-05 2002-10-21 富士通株式会社 エコーキャンセラの波形歪み補償装置
US5887059A (en) * 1996-01-30 1999-03-23 Advanced Micro Devices, Inc. System and method for performing echo cancellation in a communications network employing a mixed mode LMS adaptive balance filter
DE19639703C2 (de) * 1996-09-26 1999-05-20 Siemens Ag Verfahren und Anordnung zur Echokompensation
US6185195B1 (en) * 1997-05-16 2001-02-06 Qualcomm Incorporated Methods for preventing and detecting message collisions in a half-duplex communication system
US7424552B2 (en) * 1997-12-17 2008-09-09 Src Computers, Inc. Switch/network adapter port incorporating shared memory resources selectively accessible by a direct execution logic element and one or more dense logic devices
US20020021693A1 (en) * 1998-05-01 2002-02-21 At&T Corp. Sharing of voice-switched network and internet resources for intelligent session processing
US6563802B2 (en) * 1998-06-22 2003-05-13 Intel Corporation Echo cancellation with dynamic latency adjustment
US7231056B2 (en) * 2004-02-20 2007-06-12 Jdi Jing Deng Industrial Co., Ltd. Ear-hook earphone with microphone
JP7143708B2 (ja) * 2018-09-28 2022-09-29 セイコーエプソン株式会社 電子時計

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327467A1 (de) * 1983-07-29 1985-02-14 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zur kompensation von echosignalen
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
ES2021285B3 (es) * 1986-01-30 1991-11-01 Siemens Ag Compensador de eco
EP0303101B1 (de) * 1987-07-29 1992-09-30 Siemens Aktiengesellschaft Echokompensator
JPH0752859B2 (ja) * 1987-11-06 1995-06-05 日本電気株式会社 エコー除去装置

Also Published As

Publication number Publication date
EP0300427A1 (de) 1989-01-25
EP0300427B1 (de) 1992-09-30
DE3874997T2 (de) 1993-03-25
US4972467A (en) 1990-11-20
CA1317354C (en) 1993-05-04
AU604137B2 (en) 1990-12-06
AU1922288A (en) 1989-01-27

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition