ZA974951B - Echo suppressor and non-linear processor of echo canceller. - Google Patents

Echo suppressor and non-linear processor of echo canceller.

Info

Publication number
ZA974951B
ZA974951B ZA9704951A ZA974951A ZA974951B ZA 974951 B ZA974951 B ZA 974951B ZA 9704951 A ZA9704951 A ZA 9704951A ZA 974951 A ZA974951 A ZA 974951A ZA 974951 B ZA974951 B ZA 974951B
Authority
ZA
South Africa
Prior art keywords
echo
far
linear processor
suppressor
canceller
Prior art date
Application number
ZA9704951A
Other languages
English (en)
Inventor
Olli Kirla
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of ZA974951B publication Critical patent/ZA974951B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
ZA9704951A 1996-06-19 1997-06-05 Echo suppressor and non-linear processor of echo canceller. ZA974951B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI962562A FI106489B (fi) 1996-06-19 1996-06-19 Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori

Publications (1)

Publication Number Publication Date
ZA974951B true ZA974951B (en) 1997-12-30

Family

ID=8546250

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9704951A ZA974951B (en) 1996-06-19 1997-06-05 Echo suppressor and non-linear processor of echo canceller.

Country Status (12)

Country Link
US (1) US6574336B1 (de)
EP (1) EP0898816B1 (de)
JP (1) JP4090505B2 (de)
CN (1) CN1173487C (de)
AT (1) ATE262753T1 (de)
AU (1) AU723043B2 (de)
CA (1) CA2258618C (de)
DE (1) DE69728262T2 (de)
FI (1) FI106489B (de)
NZ (1) NZ333383A (de)
WO (1) WO1997049196A2 (de)
ZA (1) ZA974951B (de)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE511073C2 (sv) * 1997-09-10 1999-08-02 Ericsson Telefon Ab L M Sätt och anordning för ekoestimering och undertryckning i telefonsystem
US6163608A (en) * 1998-01-09 2000-12-19 Ericsson Inc. Methods and apparatus for providing comfort noise in communications systems
EP1062737B8 (de) * 1998-01-15 2009-03-25 Siemens Enterprise Communications GmbH & Co. KG Verfahren zum bereitstellen von einrichtungen zur echounterdrückung in kommunikationsverbindungen mit automaten
FI981091A (fi) * 1998-05-15 1999-11-16 Nokia Networks Oy Menetelmä ja laitteisto kaiun poistamiseksi digitaalisessa matkaviestinjärjestelmässä
WO2000052844A1 (de) 1999-03-01 2000-09-08 Infineon Technologies Ag Nichtlineare echokompensation bei dmt-systemen
US6813352B1 (en) * 1999-09-10 2004-11-02 Lucent Technologies Inc. Quadrature filter augmentation of echo canceler basis functions
US6925174B2 (en) * 1999-12-09 2005-08-02 Broadcom Corporation Interaction between echo canceller and packet voice processing
US6993126B1 (en) 2000-04-28 2006-01-31 Clearsonics Pty Ltd Apparatus and method for detecting far end speech
JP2002111552A (ja) * 2000-09-29 2002-04-12 Fujitsu Ltd 音響エコーキャンセラ及びハンズフリー電話機
US6968064B1 (en) * 2000-09-29 2005-11-22 Forgent Networks, Inc. Adaptive thresholds in acoustic echo canceller for use during double talk
DE60029147T2 (de) 2000-12-29 2007-05-31 Nokia Corp. Qualitätsverbesserung eines audiosignals in einem digitalen netzwerk
EP1286509A3 (de) * 2001-08-21 2004-02-04 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur Echokompensation in einem Telekommunikationsnetz
US7154867B1 (en) * 2001-12-06 2006-12-26 At&T Corporation Echo reduction
US6904146B2 (en) * 2002-05-03 2005-06-07 Acoustic Technology, Inc. Full duplex echo cancelling circuit
GB2389287B (en) * 2002-05-31 2005-11-23 Zarlink Semiconductor Inc Distributed echo cancelling
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7215765B2 (en) 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US7242762B2 (en) 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
US7409057B1 (en) 2002-07-03 2008-08-05 Marvell International Ltd. Nonlinear echo compensator for class B transmitter line driver
JP4161628B2 (ja) * 2002-07-19 2008-10-08 日本電気株式会社 エコー抑圧方法及び装置
US7672445B1 (en) * 2002-11-15 2010-03-02 Fortemedia, Inc. Method and system for nonlinear echo suppression
US7272224B1 (en) * 2003-03-03 2007-09-18 Apple Inc. Echo cancellation
US7054437B2 (en) * 2003-06-27 2006-05-30 Nokia Corporation Statistical adaptive-filter controller
CN1780165B (zh) * 2004-11-23 2011-07-27 华为技术有限公司 一种回声消除装置和方法
US7724693B2 (en) * 2005-07-28 2010-05-25 Qnx Software Systems (Wavemakers), Inc. Network dependent signal processing
US8326614B2 (en) 2005-09-02 2012-12-04 Qnx Software Systems Limited Speech enhancement system
US8295475B2 (en) * 2006-01-13 2012-10-23 Microsoft Corporation Selective glitch detection, clock drift compensation, and anti-clipping in audio echo cancellation
JP4946090B2 (ja) * 2006-02-21 2012-06-06 ヤマハ株式会社 収音放音一体型装置
US7773743B2 (en) 2006-04-28 2010-08-10 Microsoft Corporation Integration of a microphone array with acoustic echo cancellation and residual echo suppression
US7831035B2 (en) * 2006-04-28 2010-11-09 Microsoft Corporation Integration of a microphone array with acoustic echo cancellation and center clipping
US7817797B2 (en) * 2006-06-07 2010-10-19 Mitel Networks Corporation Method and apparatus for detecting echo path changes in an acoustic echo canceller
CN101321201B (zh) * 2007-06-06 2011-03-16 联芯科技有限公司 回声消除装置、通信终端及确定回声时延的方法
US8208621B1 (en) 2007-10-12 2012-06-26 Mediatek Inc. Systems and methods for acoustic echo cancellation
JP5086442B2 (ja) * 2007-12-20 2012-11-28 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 雑音抑圧方法及び装置
EP2232704A4 (de) * 2007-12-20 2010-12-01 Ericsson Telefon Ab L M Rauschunterdrückungsverfahren und vorrichtung
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
US8433058B2 (en) * 2008-08-08 2013-04-30 Avaya Inc. Method and system for distributed speakerphone echo cancellation
EP2380339B1 (de) * 2008-12-22 2018-08-15 Koninklijke Philips N.V. Bestimmen einer akustischen kopplung zwischen einem sprechersignal des fernen endes und einem kombinierten signal
US8750491B2 (en) * 2009-03-24 2014-06-10 Microsoft Corporation Mitigation of echo in voice communication using echo detection and adaptive non-linear processor
US8625776B2 (en) * 2009-09-23 2014-01-07 Polycom, Inc. Detection and suppression of returned audio at near-end
CN102215189B (zh) * 2010-04-02 2014-12-17 富士通株式会社 滤波器、相干接收机装置和相干接收方法
US9042535B2 (en) * 2010-09-29 2015-05-26 Cisco Technology, Inc. Echo control optimization
CN103718538B (zh) * 2011-05-17 2015-12-16 谷歌公司 可实现声学回声消除的音频信号非线性后期处理方法和系统
CN102457632B (zh) * 2011-12-29 2014-07-30 歌尔声学股份有限公司 一种多受话端回声消除方法
DK2822263T3 (da) * 2013-07-05 2019-06-17 Sennheiser Communications As Kommunikationsanordning med ekkoundertrykkelse
GB2525051B (en) 2014-09-30 2016-04-13 Imagination Tech Ltd Detection of acoustic echo cancellation
CN105553442B (zh) * 2015-12-18 2018-12-25 南通大学 基于网络的Lipschitz非线性系统的H∞滤波器信息处理方法
CN105872156B (zh) * 2016-05-25 2019-02-12 腾讯科技（深圳）有限公司 一种回声时延跟踪方法及装置
CN106227700B (zh) * 2016-08-15 2019-01-08 江南大学 一种网络化控制系统的非脆弱耗散滤波方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8901247A (nl) 1989-05-19 1990-12-17 Philips Nv Adaptief tijddiscreet transversaal filter.
JPH07250010A (ja) 1994-03-10 1995-09-26 Fujitsu Ltd ノンリニア・プロセッサ
EP1578026A3 (de) 1994-05-06 2005-09-28 NTT Mobile Communications Network Inc. Verfahren und Gerät zur Detektion von Doppelsprechen sowie Echokompensator
JPH0837480A (ja) 1994-07-22 1996-02-06 Fujitsu Ltd エコーキャンセラ
US5526426A (en) 1994-11-08 1996-06-11 Signalworks System and method for an efficiently constrained frequency-domain adaptive filter
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
FI110826B (fi) * 1995-06-08 2003-03-31 Nokia Corp Akustisen kaiun poisto digitaalisessa matkaviestinjärjestelmässä
US5561668A (en) * 1995-07-06 1996-10-01 Coherent Communications Systems Corp. Echo canceler with subband attenuation and noise injection control
JP3417159B2 (ja) 1995-08-11 2003-06-16 Ｋｄｄｉ株式会社 エコーキャンセラ装置
US5668794A (en) * 1995-09-29 1997-09-16 Crystal Semiconductor Variable gain echo suppressor

Also Published As

Publication number Publication date
DE69728262D1 (de) 2004-04-29
AU723043B2 (en) 2000-08-17
WO1997049196A2 (en) 1997-12-24
JP4090505B2 (ja) 2008-05-28
EP0898816B1 (de) 2004-03-24
CN1173487C (zh) 2004-10-27
NZ333383A (en) 1999-08-30
AU3178097A (en) 1998-01-07
JP2000512466A (ja) 2000-09-19
ATE262753T1 (de) 2004-04-15
FI962562A0 (fi) 1996-06-19
FI106489B (fi) 2001-02-15
US6574336B1 (en) 2003-06-03
CA2258618C (en) 2008-01-08
CA2258618A1 (en) 1997-12-24
CN1223036A (zh) 1999-07-14
DE69728262T2 (de) 2005-01-20
WO1997049196A3 (en) 1998-02-12
EP0898816A2 (de) 1999-03-03
FI962562A (fi) 1997-12-20

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