FI962562A - Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori - Google Patents

Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori Download PDF

Info

Publication number
FI962562A
FI962562A FI962562A FI962562A FI962562A FI 962562 A FI962562 A FI 962562A FI 962562 A FI962562 A FI 962562A FI 962562 A FI962562 A FI 962562A FI 962562 A FI962562 A FI 962562A
Authority
FI
Finland
Prior art keywords
echo
far
canceller
acoustic echo
latch
Prior art date
Application number
FI962562A
Other languages
English (en)
Swedish (sv)
Other versions
FI962562A0 (fi
FI106489B (fi
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 FI962562A0 publication Critical patent/FI962562A0/fi
Priority to FI962562A priority Critical patent/FI106489B/fi
Priority to ZA9704951A priority patent/ZA974951B/xx
Priority to AT97927209T priority patent/ATE262753T1/de
Priority to CNB971956723A priority patent/CN1173487C/zh
Priority to US09/194,747 priority patent/US6574336B1/en
Priority to DE69728262T priority patent/DE69728262T2/de
Priority to PCT/FI1997/000390 priority patent/WO1997049196A2/en
Priority to EP97927209A priority patent/EP0898816B1/en
Priority to NZ333383A priority patent/NZ333383A/xx
Priority to JP50239298A priority patent/JP4090505B2/ja
Priority to CA002258618A priority patent/CA2258618C/en
Priority to AU31780/97A priority patent/AU723043B2/en
Publication of FI962562A publication Critical patent/FI962562A/fi
Application granted granted Critical
Publication of FI106489B publication Critical patent/FI106489B/fi

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)
FI962562A 1996-06-19 1996-06-19 Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori FI106489B (fi)

Priority Applications (12)

Application Number Priority Date Filing Date Title
FI962562A FI106489B (fi) 1996-06-19 1996-06-19 Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori
ZA9704951A ZA974951B (en) 1996-06-19 1997-06-05 Echo suppressor and non-linear processor of echo canceller.
PCT/FI1997/000390 WO1997049196A2 (en) 1996-06-19 1997-06-18 Echo suppressor and non-linear processor of echo canceller
CNB971956723A CN1173487C (zh) 1996-06-19 1997-06-18 回波消除器中的回波抑制器和非线性处理器
US09/194,747 US6574336B1 (en) 1996-06-19 1997-06-18 Echo suppressor and non-linear processor of echo canceller
DE69728262T DE69728262T2 (de) 1996-06-19 1997-06-18 Echounterdrücker und nicht- linearer prozessor eines echokompensators
AT97927209T ATE262753T1 (de) 1996-06-19 1997-06-18 Echounterdrücker und nicht- linearer prozessor eines echokompensators
EP97927209A EP0898816B1 (en) 1996-06-19 1997-06-18 Echo suppressor and non-linear processor of echo canceller
NZ333383A NZ333383A (en) 1996-06-19 1997-06-18 Echo supressor for 4-wire telephone system, far-end signal treated with weighted filter
JP50239298A JP4090505B2 (ja) 1996-06-19 1997-06-18 エコー抑制装置及びエコー打消装置の非直線的プロセッサ
CA002258618A CA2258618C (en) 1996-06-19 1997-06-18 Echo suppressor and non-linear processor of echo canceller
AU31780/97A AU723043B2 (en) 1996-06-19 1997-06-18 Echo suppressor and non-linear processor of echo canceller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI962562 1996-06-19
FI962562A FI106489B (fi) 1996-06-19 1996-06-19 Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori

Publications (3)

Publication Number Publication Date
FI962562A0 FI962562A0 (fi) 1996-06-19
FI962562A true FI962562A (fi) 1997-12-20
FI106489B FI106489B (fi) 2001-02-15

Family

ID=8546250

Family Applications (1)

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

Country Status (12)

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

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
WO1999037038A1 (de) * 1998-01-15 1999-07-22 Siemens Schweiz Ag 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
US7539615B2 (en) 2000-12-29 2009-05-26 Nokia Siemens Networks Oy Audio signal quality enhancement in a digital network
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
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
US7215765B2 (en) 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
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
CN101904098B (zh) * 2007-12-20 2014-10-22 艾利森电话股份有限公司 噪声抑制方法和设备
WO2009082299A1 (en) * 2007-12-20 2009-07-02 Telefonaktiebolaget L M Ericsson (Publ) Noise suppression method and apparatus
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 (en) 2008-12-22 2018-08-15 Koninklijke Philips N.V. Determining an acoustic coupling between a far-end talker signal and a combined 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
EP1578025A1 (en) * 1994-05-06 2005-09-21 NTT Mobile Communications Network Inc. Double talk detecting method, double talk detecting apparatus, and echo canceler
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
NZ333383A (en) 1999-08-30
US6574336B1 (en) 2003-06-03
DE69728262T2 (de) 2005-01-20
CA2258618A1 (en) 1997-12-24
JP2000512466A (ja) 2000-09-19
JP4090505B2 (ja) 2008-05-28
ZA974951B (en) 1997-12-30
AU723043B2 (en) 2000-08-17
DE69728262D1 (de) 2004-04-29
ATE262753T1 (de) 2004-04-15
EP0898816B1 (en) 2004-03-24
FI962562A0 (fi) 1996-06-19
EP0898816A2 (en) 1999-03-03
CN1173487C (zh) 2004-10-27
CN1223036A (zh) 1999-07-14
FI106489B (fi) 2001-02-15
AU3178097A (en) 1998-01-07
WO1997049196A3 (en) 1998-02-12
CA2258618C (en) 2008-01-08
WO1997049196A2 (en) 1997-12-24

Similar Documents

Publication Publication Date Title
FI962562A (fi) Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori
AU650477B2 (en) Residual echo elimination with proportionate noise injection
DE60124501T2 (de) Verbessertes verfahren und vorrichtung zur implementierung eines echounterdrückers
US8731907B2 (en) Method and test signal for measuring speech intelligibility
MY133057A (en) Methods and apparatus for improved echo suppression in communications systems
NO941904D0 (no) Ekkodempning i sambandsnett
SE9803636D0 (sv) Nonlinear processor for acoustic echo canceller
TR200001967T2 (tr) Bir bağlantının iki ucunda da oluşan ekonun kontrol edilmesi için yöntem ve ekipman.
DE10000009A1 (de) Verfahren zur koordinierten Echo- und/oder Geräuschabsenkung
DE19848641A1 (de) Doppelsprech-unempfindlicher NLMS Algorithmus
DE69216384T2 (de) Verfahren zur nichtlinearen signalverarbeitung in einem echokompensator
US7023986B2 (en) Echo canceller in a communication system at a terminal
KR840002179A (ko) 간섭 제어기
TW281833B (en) Method and apparatus for reducing residual far-end echo in voice communications networks
Silion et al. An improved LMS algorithm for single and doubletalk echo canceller implemented on Motorola DSP SC140 [articol]
Gray Jr et al. Algorithm development of a telephone signal conditioner for the wideband integrated network
JPS6076823A (ja) センタ−クリツパ
GB2341066A (en) Adaptive echo canceller removes non-linear signals
CN101286763A (zh) 一种有效的回波抑制器
JPH02146825A (ja) エコーキャンセラ