SE9504520D0 - Förfarande och anordning vid kommunikationssystem - Google Patents

Förfarande och anordning vid kommunikationssystem

Info

Publication number
SE9504520D0
SE9504520D0 SE9504520A SE9504520A SE9504520D0 SE 9504520 D0 SE9504520 D0 SE 9504520D0 SE 9504520 A SE9504520 A SE 9504520A SE 9504520 A SE9504520 A SE 9504520A SE 9504520 D0 SE9504520 D0 SE 9504520D0
Authority
SE
Sweden
Prior art keywords
residual
dynamic threshold
communication systems
power estimate
estimate
Prior art date
Application number
SE9504520A
Other languages
English (en)
Other versions
SE505692C2 (sv
SE9504520L (sv
Inventor
Anders Eriksson
Johnny Karlsen
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 SE9504520A priority Critical patent/SE505692C2/sv
Publication of SE9504520D0 publication Critical patent/SE9504520D0/sv
Priority to PCT/SE1996/001610 priority patent/WO1997023055A1/en
Priority to BR9612049A priority patent/BR9612049A/pt
Priority to AU11552/97A priority patent/AU723722B2/en
Priority to JP9522699A priority patent/JP2000502229A/ja
Priority to DE69633458T priority patent/DE69633458T2/de
Priority to CA002240726A priority patent/CA2240726A1/en
Priority to EP96942704A priority patent/EP0868787B1/en
Priority to KR1019980704390A priority patent/KR100308226B1/ko
Publication of SE9504520L publication Critical patent/SE9504520L/sv
Publication of SE505692C2 publication Critical patent/SE505692C2/sv
Priority to US09/098,506 priority patent/US6195430B1/en

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)
SE9504520A 1995-12-18 1995-12-18 Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal SE505692C2 (sv)

Priority Applications (10)

Application Number Priority Date Filing Date Title
SE9504520A SE505692C2 (sv) 1995-12-18 1995-12-18 Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal
KR1019980704390A KR100308226B1 (ko) 1995-12-18 1996-12-06 잔류신호의 전력 평가로 에코를 제거하는 방법 및 장치
JP9522699A JP2000502229A (ja) 1995-12-18 1996-12-06 残留信号内の電力見積を使用するエコーキャンセルのための方法および装置
BR9612049A BR9612049A (pt) 1995-12-18 1996-12-06 Processo de cancelamento de eco e cancelador de eco
AU11552/97A AU723722B2 (en) 1995-12-18 1996-12-06 Method and device for echo cancellation using power estimation in a residual signal
PCT/SE1996/001610 WO1997023055A1 (en) 1995-12-18 1996-12-06 Method and device for echo cancellation using power estimation in a residual signal
DE69633458T DE69633458T2 (de) 1995-12-18 1996-12-06 Verfahren und gerät zur echounterdrückung unter verwendung der leistungsschätzung des restsignals
CA002240726A CA2240726A1 (en) 1995-12-18 1996-12-06 Method and device for echo cancellation using power estimation in a residual signal
EP96942704A EP0868787B1 (en) 1995-12-18 1996-12-06 Method and device for echo cancellation using power estimation in a residual signal
US09/098,506 US6195430B1 (en) 1995-12-18 1998-06-17 Method and device for echo cancellation using power estimation in a residual signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9504520A SE505692C2 (sv) 1995-12-18 1995-12-18 Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal

Publications (3)

Publication Number Publication Date
SE9504520D0 true SE9504520D0 (sv) 1995-12-18
SE9504520L SE9504520L (sv) 1997-06-19
SE505692C2 SE505692C2 (sv) 1997-09-29

Family

ID=20400627

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9504520A SE505692C2 (sv) 1995-12-18 1995-12-18 Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal

Country Status (10)

Country Link
US (1) US6195430B1 (sv)
EP (1) EP0868787B1 (sv)
JP (1) JP2000502229A (sv)
KR (1) KR100308226B1 (sv)
AU (1) AU723722B2 (sv)
BR (1) BR9612049A (sv)
CA (1) CA2240726A1 (sv)
DE (1) DE69633458T2 (sv)
SE (1) SE505692C2 (sv)
WO (1) WO1997023055A1 (sv)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6160886A (en) * 1996-12-31 2000-12-12 Ericsson Inc. Methods and apparatus for improved echo suppression in communications systems
SE511073C2 (sv) * 1997-09-10 1999-08-02 Ericsson Telefon Ab L M Sätt och anordning för ekoestimering och undertryckning i telefonsystem
GB2330745B (en) 1997-10-24 2002-08-21 Mitel Corp Nonlinear processor for acoustic echo canceller
US6198819B1 (en) * 1997-11-14 2001-03-06 Tellabs Operations, Inc. Echo canceller having improved non-linear processor
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
US6256384B1 (en) * 1997-12-02 2001-07-03 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for cancelling echo originating from a mobile terminal
CA2245411A1 (en) * 1998-08-20 2000-02-20 Mitel Corporation Echo canceller with compensation for codec limiting effects
US6658107B1 (en) * 1998-10-23 2003-12-02 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for providing echo suppression using frequency domain nonlinear processing
SE516143C2 (sv) 1999-05-10 2001-11-26 Ericsson Telefon Ab L M Skattning av ren fördröjning
US6687373B1 (en) * 1999-08-24 2004-02-03 Nortel Networks Limited Heusristics for optimum beta factor and filter order determination in echo canceler systems
US6694019B1 (en) * 1999-08-26 2004-02-17 Nortel Networks Limited Method and apparatus for infinite return loss handler for network echo canceller
US6438225B1 (en) * 2000-01-13 2002-08-20 Motorola, Inc. Method and system for detecting and controlling severe echo
JP4503158B2 (ja) * 2000-09-25 2010-07-14 京セラ株式会社 エコーキャンセラ
US6766020B1 (en) * 2001-02-23 2004-07-20 3Com Corporation System and method for comfort noise generation
KR100477638B1 (ko) * 2001-09-11 2005-03-23 삼성전자주식회사 ２ｄ／３ｄ 겸용 디스플레이
JP4282260B2 (ja) * 2001-11-20 2009-06-17 株式会社リコー エコーキャンセラ
US6961422B2 (en) * 2001-12-28 2005-11-01 Avaya Technology Corp. Gain control method for acoustic echo cancellation and suppression
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US7215765B2 (en) * 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US7388954B2 (en) 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
US7672445B1 (en) * 2002-11-15 2010-03-02 Fortemedia, Inc. Method and system for nonlinear echo suppression
US7003099B1 (en) * 2002-11-15 2006-02-21 Fortmedia, Inc. Small array microphone for acoustic echo cancellation and noise suppression
DE60331476D1 (de) * 2003-01-08 2010-04-08 Nxp Bv Gerät und verfahren für echounterdrückung, insbesondere für telefone
US7680265B2 (en) * 2003-12-12 2010-03-16 Continental Automotive Systems, Inc. Echo canceler circuit and method
US7599483B2 (en) * 2003-12-12 2009-10-06 Temic Automotive Of North America, Inc. Echo canceler circuit and method
US7099458B2 (en) * 2003-12-12 2006-08-29 Motorola, Inc. Downlink activity and double talk probability detector and method for an echo canceler circuit
US7046794B2 (en) 2003-12-12 2006-05-16 Motorola, Inc. Double talk activity detector and method for an echo canceler circuit
FR2866494A1 (fr) * 2004-02-18 2005-08-19 Cit Alcatel Dispositif de reduction d'echo par seuillage adaptable dynamiquement en phase de convergence
US7523035B2 (en) * 2004-07-26 2009-04-21 Motorola, Inc. Hands-free circuit and method for communicating with a wireless device
DE602005008895D1 (de) * 2005-02-11 2008-09-25 Mitel Networks Corp Verfahren zur Messung der Verzerrung und zur Bestimmung der Schwelle des Restechos in Verbindungsleitungen
JP4509126B2 (ja) * 2007-01-24 2010-07-21 沖電気工業株式会社 エコーキャンセラ及びエコーキャンセル方法
JP4877083B2 (ja) * 2007-06-12 2012-02-15 沖電気工業株式会社 残留エコー抑圧制御装置、方法及びプログラム
JP4456622B2 (ja) * 2007-07-25 2010-04-28 沖電気工業株式会社 ダブルトーク検出器、ダブルトーク検出方法及びエコーキャンセラ
US8792649B2 (en) * 2008-09-24 2014-07-29 Mitsubishi Electric Corporation Echo canceller used for voice communication
US8861713B2 (en) * 2013-03-17 2014-10-14 Texas Instruments Incorporated Clipping based on cepstral distance for acoustic echo canceller
JP6446893B2 (ja) 2014-07-31 2019-01-09 富士通株式会社 エコー抑圧装置、エコー抑圧方法及びエコー抑圧用コンピュータプログラム

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3364531D1 (en) * 1982-10-15 1986-08-21 British Telecomm Noise control circuit
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
FR2564667B1 (fr) * 1984-05-15 1986-09-19 Trt Telecom Radio Electr Dispositif de commande d'un annuleur d'echo et d'un ecreteur de centre
US4894820A (en) * 1987-03-24 1990-01-16 Oki Electric Industry Co., Ltd. Double-talk detection in an echo canceller
JP2608074B2 (ja) * 1987-11-02 1997-05-07 沖電気工業株式会社 エコーキャンセラ
US4879745A (en) * 1988-10-12 1989-11-07 Ibm Corporation Half-duplex speakerphone
US5157653A (en) 1990-08-03 1992-10-20 Coherent Communications Systems Corp. Residual echo elimination with proportionate noise injection
NL9002790A (nl) * 1990-12-18 1992-07-16 Philips Nv Echocompensator met verbeterde dubbelspraak detectie.
US5274705A (en) * 1991-09-24 1993-12-28 Tellabs Inc. Nonlinear processor for an echo canceller and method
US5327495A (en) * 1992-10-23 1994-07-05 Dsc Communications Corporation Apparatus and method for controlling an echo canceler
JP2626437B2 (ja) 1992-12-28 1997-07-02 日本電気株式会社 残留エコー制御装置
US5475731A (en) * 1994-01-07 1995-12-12 Ericsson Inc. Echo-canceling system and method using echo estimate to modify error signal

Also Published As

Publication number Publication date
WO1997023055A1 (en) 1997-06-26
AU1155297A (en) 1997-07-14
DE69633458T2 (de) 2005-10-13
EP0868787B1 (en) 2004-09-22
KR100308226B1 (ko) 2001-11-02
JP2000502229A (ja) 2000-02-22
SE505692C2 (sv) 1997-09-29
SE9504520L (sv) 1997-06-19
EP0868787A1 (en) 1998-10-07
KR20000064382A (ko) 2000-11-06
AU723722B2 (en) 2000-09-07
CA2240726A1 (en) 1997-06-26
BR9612049A (pt) 1999-07-13
DE69633458D1 (de) 2004-10-28
US6195430B1 (en) 2001-02-27

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