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NO981713L - FremgangsmÕte ved ekko-kansellering, omfattende dualt adaptivt filter - Google Patents

FremgangsmÕte ved ekko-kansellering, omfattende dualt adaptivt filter

Info

Publication number
NO981713L
NO981713L NO981713A NO981713A NO981713L NO 981713 L NO981713 L NO 981713L NO 981713 A NO981713 A NO 981713A NO 981713 A NO981713 A NO 981713A NO 981713 L NO981713 L NO 981713L
Authority
NO
Norway
Prior art keywords
adaptive filter
echo cancellation
cancellation method
dual adaptive
dual
Prior art date
Application number
NO981713A
Other languages
English (en)
Other versions
NO315539B1 (no
NO981713D0 (no
Inventor
Johnny Karlsen
Anders Eriksson
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
Publication of NO981713D0 publication Critical patent/NO981713D0/no
Publication of NO981713L publication Critical patent/NO981713L/no
Publication of NO315539B1 publication Critical patent/NO315539B1/no

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
    • H04B3/237—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
NO19981713A 1995-10-18 1998-04-16 Fremgangsmåte ved ekko-kansellering, omfattende dualt adaptivt filter NO315539B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9503640A SE505150C3 (sv) 1995-10-18 1995-10-18 Adaptivt ekoslaeckningsfoerfarande av dubbelfiltertyp
PCT/SE1996/001317 WO1997015124A1 (en) 1995-10-18 1996-10-16 An adaptive dual filter echo cancellation method

Publications (3)

Publication Number Publication Date
NO981713D0 NO981713D0 (no) 1998-04-16
NO981713L true NO981713L (no) 1998-06-02
NO315539B1 NO315539B1 (no) 2003-09-15

Family

ID=20399863

Family Applications (1)

Application Number Title Priority Date Filing Date
NO19981713A NO315539B1 (no) 1995-10-18 1998-04-16 Fremgangsmåte ved ekko-kansellering, omfattende dualt adaptivt filter

Country Status (14)

Country Link
US (1) US6219418B1 (no)
EP (1) EP0856213A1 (no)
JP (1) JP4026693B2 (no)
KR (1) KR100382003B1 (no)
CN (1) CN1095256C (no)
AU (1) AU710224B2 (no)
BR (1) BR9610968A (no)
CA (1) CA2233679C (no)
EE (1) EE03363B1 (no)
NO (1) NO315539B1 (no)
RU (1) RU2175814C2 (no)
SE (1) SE505150C3 (no)
TR (1) TR199800691T1 (no)
WO (1) WO1997015124A1 (no)

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US6694019B1 (en) * 1999-08-26 2004-02-17 Nortel Networks Limited Method and apparatus for infinite return loss handler for network echo canceller
NL1013044C2 (nl) * 1999-09-15 2001-03-16 Koninkl Kpn Nv Kwaliteitsmeting van spraaksignalen met echo-verstoring.
US6792106B1 (en) * 1999-09-17 2004-09-14 Agere Systems Inc. Echo canceller and method of echo cancellation using an NLMS algorithm
US6683859B1 (en) * 1999-11-12 2004-01-27 Motorola, Inc. Method and apparatus for echo cancellation updates in a multicarrier transceiver system
US20010040875A1 (en) 2000-01-25 2001-11-15 Igor Tkachov System and method for the application of an LMS method to updating an echo canceller in an ADSL modem
US6928161B1 (en) * 2000-05-31 2005-08-09 Intel Corporation Echo cancellation apparatus, systems, and methods
KR100431965B1 (ko) * 2001-06-23 2004-07-21 (주) 에스제이-테크 시변 적응알고리즘이 적용된 음향반향 제거장치 및 그 방법
US6950842B2 (en) * 2002-01-23 2005-09-27 Analog Devices, Inc. Echo canceller having an adaptive filter with a dynamically adjustable step size
GB2389286A (en) 2002-05-28 2003-12-03 Mitel Knowledge Corp Echo cancellation
GB2395878A (en) * 2002-11-29 2004-06-02 Mitel Knowledge Corp Method of capturing constant echo path information using default coefficients
US7573839B2 (en) * 2004-07-07 2009-08-11 Broadcom Corporation Line driver for an adaptive hybrid circuit
KR101185820B1 (ko) * 2004-10-13 2012-10-02 코닌클리케 필립스 일렉트로닉스 엔.브이. 에코 소거
US7610196B2 (en) 2004-10-26 2009-10-27 Qnx Software Systems (Wavemakers), Inc. Periodic signal enhancement system
US8543390B2 (en) * 2004-10-26 2013-09-24 Qnx Software Systems Limited Multi-channel periodic signal enhancement system
US7949520B2 (en) * 2004-10-26 2011-05-24 QNX Software Sytems Co. Adaptive filter pitch extraction
US8170879B2 (en) * 2004-10-26 2012-05-01 Qnx Software Systems Limited Periodic signal enhancement system
US8306821B2 (en) * 2004-10-26 2012-11-06 Qnx Software Systems Limited Sub-band periodic signal enhancement system
US7716046B2 (en) * 2004-10-26 2010-05-11 Qnx Software Systems (Wavemakers), Inc. Advanced periodic signal enhancement
US7680652B2 (en) * 2004-10-26 2010-03-16 Qnx Software Systems (Wavemakers), Inc. Periodic signal enhancement system
GB2427332B (en) * 2005-06-16 2007-05-16 Trinity Convergence Inc Systems and methods for adaptive echo cancellation
US7613291B1 (en) * 2005-08-10 2009-11-03 Mindspeed Technologies, Inc. Echo path change detection using dual sparse filtering
US8295475B2 (en) * 2006-01-13 2012-10-23 Microsoft Corporation Selective glitch detection, clock drift compensation, and anti-clipping in audio echo cancellation
US7831035B2 (en) * 2006-04-28 2010-11-09 Microsoft Corporation Integration of a microphone array with acoustic echo cancellation and center clipping
US7773743B2 (en) 2006-04-28 2010-08-10 Microsoft Corporation Integration of a microphone array with acoustic echo cancellation and residual echo suppression
US20080231557A1 (en) * 2007-03-20 2008-09-25 Leadis Technology, Inc. Emission control in aged active matrix oled display using voltage ratio or current ratio
US8259928B2 (en) * 2007-04-23 2012-09-04 Microsoft Corporation Method and apparatus for reducing timestamp noise in audio echo cancellation
US8850154B2 (en) 2007-09-11 2014-09-30 2236008 Ontario Inc. Processing system having memory partitioning
US8904400B2 (en) * 2007-09-11 2014-12-02 2236008 Ontario Inc. Processing system having a partitioning component for resource partitioning
US8694310B2 (en) 2007-09-17 2014-04-08 Qnx Software Systems Limited Remote control server protocol system
US8209514B2 (en) * 2008-02-04 2012-06-26 Qnx Software Systems Limited Media processing system having resource partitioning
US8380253B2 (en) * 2008-02-15 2013-02-19 Microsoft Corporation Voice switching for voice communication on computers
US8369251B2 (en) * 2008-06-20 2013-02-05 Microsoft Corporation Timestamp quality assessment for assuring acoustic echo canceller operability
DK2148525T3 (da) * 2008-07-24 2013-08-19 Oticon As Kodebogsbaseret estimering af tilbagekoblingsvej
RU2407148C1 (ru) * 2009-08-03 2010-12-20 Общество с ограниченной ответственностью "ТяжПромИнжиниринг" Адаптивный эхокомпенсатор на рекурсивном фильтре м-го порядка
RU2412546C1 (ru) * 2009-08-03 2011-02-20 Общество с ограниченной ответственностью "ТяжПромИнжиниринг" Адаптивный эхокомпенсатор на рекурсивном фильтре
RU2412545C1 (ru) * 2009-08-03 2011-02-20 Общество с ограниченной ответственностью "ТяжПромИнжиниринг" Адаптивный эхокомпенсатор
CN102117620B (zh) * 2010-01-06 2012-08-29 杭州华三通信技术有限公司 一种双滤波器传递滤波器系数的方法及装置
US8737457B2 (en) * 2012-09-28 2014-05-27 Telefonaktiebolaget L M Ericsson (Publ) Adaptive smoothing of channel estimates
GB2521881B (en) * 2014-04-02 2016-02-10 Imagination Tech Ltd Auto-tuning of non-linear processor threshold
CN104242872B (zh) * 2014-09-30 2017-12-01 华为技术有限公司 一种信号处理方法及装置
US9479650B1 (en) * 2015-05-04 2016-10-25 Captioncall, Llc Methods and devices for updating filter coefficients during echo cancellation
CN105654959B (zh) * 2016-01-22 2020-03-06 韶关学院 一种自适应滤波的系数更新方法及装置
US10367948B2 (en) * 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
CN109547655A (zh) * 2018-12-30 2019-03-29 广东大仓机器人科技有限公司 一种网络语音通话的回声消除处理的方法
CN111681666B (zh) * 2020-05-21 2022-10-04 浙江大华技术股份有限公司 滤波器系数的备份方法、装置及计算机存储介质
CN113938548B (zh) * 2020-06-29 2024-12-24 阿里巴巴集团控股有限公司 一种终端通信的回声抑制方法和装置
CN115604614B (zh) * 2022-12-15 2023-03-31 成都海普迪科技有限公司 采用吊装麦克风进行本地扩声和远程互动的系统和方法

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US3787645A (en) 1971-05-19 1974-01-22 Nippon Electric Co Echo canceller having two echo path models
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
AU4695485A (en) * 1984-09-21 1986-03-27 Alcatel N.V. Digital hybrid
NL8701633A (nl) * 1987-07-10 1989-02-01 Philips Nv Digitale echocompensator.
SE501248C2 (sv) * 1993-05-14 1994-12-19 Ericsson Telefon Ab L M Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter
US5631900A (en) * 1995-09-29 1997-05-20 Crystal Semiconductor Double-Talk detector for echo canceller

Also Published As

Publication number Publication date
KR100382003B1 (ko) 2003-08-02
EE03363B1 (et) 2001-02-15
JPH11514516A (ja) 1999-12-07
CN1200210A (zh) 1998-11-25
SE9503640D0 (sv) 1995-10-18
KR19990064258A (ko) 1999-07-26
NO315539B1 (no) 2003-09-15
NO981713D0 (no) 1998-04-16
AU710224B2 (en) 1999-09-16
EP0856213A1 (en) 1998-08-05
AU7353596A (en) 1997-05-07
CA2233679A1 (en) 1997-04-24
SE505150C3 (sv) 1997-08-04
CN1095256C (zh) 2002-11-27
RU2175814C2 (ru) 2001-11-10
SE9503640L (sv) 1997-04-19
CA2233679C (en) 2004-08-24
TR199800691T1 (xx) 1998-06-22
WO1997015124A1 (en) 1997-04-24
BR9610968A (pt) 1999-03-02
SE505150C2 (sv) 1997-07-07
JP4026693B2 (ja) 2007-12-26
US6219418B1 (en) 2001-04-17

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