SE9901692D0 - Sätt och anordning vid telefonsystem - Google Patents

Sätt och anordning vid telefonsystem

Info

Publication number
SE9901692D0
SE9901692D0 SE9901692A SE9901692A SE9901692D0 SE 9901692 D0 SE9901692 D0 SE 9901692D0 SE 9901692 A SE9901692 A SE 9901692A SE 9901692 A SE9901692 A SE 9901692A SE 9901692 D0 SE9901692 D0 SE 9901692D0
Authority
SE
Sweden
Prior art keywords
echo
delay
pure
smallcaps
impulse response
Prior art date
Application number
SE9901692A
Other languages
English (en)
Other versions
SE516143C2 (sv
SE9901692L (sv
Inventor
Toenu Trump
Dan Lusk
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE9901692A priority Critical patent/SE516143C2/sv
Publication of SE9901692D0 publication Critical patent/SE9901692D0/sv
Priority to JP2000617565A priority patent/JP2002544702A/ja
Priority to DE60040535T priority patent/DE60040535D1/de
Priority to AU47882/00A priority patent/AU4788200A/en
Priority to CN00807393.7A priority patent/CN1350727A/zh
Priority to EP00929977A priority patent/EP1192729B1/en
Priority to PCT/SE2000/000743 priority patent/WO2000069080A2/en
Priority to US09/568,526 priority patent/US6687372B1/en
Publication of SE9901692L publication Critical patent/SE9901692L/sv
Publication of SE516143C2 publication Critical patent/SE516143C2/sv

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)
  • Filters That Use Time-Delay Elements (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
SE9901692A 1999-05-10 1999-05-10 Skattning av ren fördröjning SE516143C2 (sv)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE9901692A SE516143C2 (sv) 1999-05-10 1999-05-10 Skattning av ren fördröjning
JP2000617565A JP2002544702A (ja) 1999-05-10 2000-04-19 純粋遅延推定
DE60040535T DE60040535D1 (de) 1999-05-10 2000-04-19 Schätzung der reinen verzögerung
AU47882/00A AU4788200A (en) 1999-05-10 2000-04-19 Pure delay estimation
CN00807393.7A CN1350727A (zh) 1999-05-10 2000-04-19 纯延迟估计
EP00929977A EP1192729B1 (en) 1999-05-10 2000-04-19 Pure delay estimation
PCT/SE2000/000743 WO2000069080A2 (en) 1999-05-10 2000-04-19 Pure delay estimation
US09/568,526 US6687372B1 (en) 1999-05-10 2000-05-09 Pure delay estimation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9901692A SE516143C2 (sv) 1999-05-10 1999-05-10 Skattning av ren fördröjning

Publications (3)

Publication Number Publication Date
SE9901692D0 true SE9901692D0 (sv) 1999-05-10
SE9901692L SE9901692L (sv) 2000-11-11
SE516143C2 SE516143C2 (sv) 2001-11-26

Family

ID=20415534

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9901692A SE516143C2 (sv) 1999-05-10 1999-05-10 Skattning av ren fördröjning

Country Status (8)

Country Link
US (1) US6687372B1 (sv)
EP (1) EP1192729B1 (sv)
JP (1) JP2002544702A (sv)
CN (1) CN1350727A (sv)
AU (1) AU4788200A (sv)
DE (1) DE60040535D1 (sv)
SE (1) SE516143C2 (sv)
WO (1) WO2000069080A2 (sv)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205961A1 (de) 1982-02-19 1983-09-01 Albert 5600 Wuppertal Fischbach Vorrichtung zum platzsparenden aufbewahren von guetern, insbesondere zum parken von kraftfahrzeugen
US6766019B1 (en) * 2000-07-21 2004-07-20 Agere Systems Inc. Method and apparatus for performing double-talk detection in acoustic echo cancellation
US7242762B2 (en) 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7388954B2 (en) 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
US7215765B2 (en) 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US6937723B2 (en) * 2002-10-25 2005-08-30 Avaya Technology Corp. Echo detection and monitoring
US7734034B1 (en) 2005-06-21 2010-06-08 Avaya Inc. Remote party speaker phone detection
RU2427077C2 (ru) * 2005-12-05 2011-08-20 Телефонактиеболагет Лм Эрикссон (Пабл) Обнаружение эхосигнала
US20070280388A1 (en) * 2006-05-31 2007-12-06 Texas Instruments Incorporated Apparatus for and method of canceller tap shutdown in a communication system
JP5100536B2 (ja) * 2008-07-03 2012-12-19 三菱電機株式会社 遅延プロファイル推定装置および遅延プロファイル推定方法
US8452002B2 (en) 2009-09-18 2013-05-28 At&T Intellectual Property I, L.P. Methods, apparatus and articles of manufacture to cancel echo for communication paths having long bulk delays
US8577019B2 (en) * 2009-10-23 2013-11-05 At&T Intellectual Property I, L.P. Methods, apparatus and articles of manufacture to detect echo during teleconferences
JP5235226B2 (ja) * 2011-06-28 2013-07-10 日本電信電話株式会社 エコー消去装置及びそのプログラム
KR20150002784A (ko) * 2012-06-08 2015-01-07 인텔 코포레이션 장기 지연된 에코에 대한 에코 소거 알고리즘
TWI756595B (zh) * 2019-12-06 2022-03-01 瑞昱半導體股份有限公司 通訊裝置及回音消除方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587382A (en) * 1982-07-29 1986-05-06 Gte Lenkurt Incorporated Echo canceller using end delay measurement
IT1208769B (it) 1983-10-12 1989-07-10 Cselt Centro Studi Lab Telecom Teristiche varianti nel tempo procedimento e dispositivo per la cancellazione numerica dell eco generato in collegamenti con carat
EP0221221B1 (en) 1985-10-30 1991-12-27 International Business Machines Corporation A process for determining an echo path flat delay and echo canceler using said process
US4823382A (en) * 1986-10-01 1989-04-18 Racal Data Communications Inc. Echo canceller with dynamically positioned adaptive filter taps
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
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
FI935834A (sv) 1993-12-23 1995-06-24 Nokia Telecommunications Oy Foerfarande foer anpassning till ett ekoomraode i en ekodaempare
US5675644A (en) 1995-09-26 1997-10-07 Qualcomm Incorporated Method and apparatus for canceling echo accounting for delay variations
SE505692C2 (sv) 1995-12-18 1997-09-29 Ericsson Telefon Ab L M Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal
US5920548A (en) * 1996-10-01 1999-07-06 Telefonaktiebolaget L M Ericsson Echo path delay estimation

Also Published As

Publication number Publication date
US6687372B1 (en) 2004-02-03
DE60040535D1 (de) 2008-11-27
SE516143C2 (sv) 2001-11-26
WO2000069080A2 (en) 2000-11-16
SE9901692L (sv) 2000-11-11
AU4788200A (en) 2000-11-21
EP1192729A2 (en) 2002-04-03
EP1192729B1 (en) 2008-10-15
JP2002544702A (ja) 2002-12-24
WO2000069080A3 (en) 2001-02-01
CN1350727A (zh) 2002-05-22

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Legal Events

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