SE501248C2 - Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter - Google Patents

Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter

Info

Publication number
SE501248C2
SE501248C2 SE9301666A SE9301666A SE501248C2 SE 501248 C2 SE501248 C2 SE 501248C2 SE 9301666 A SE9301666 A SE 9301666A SE 9301666 A SE9301666 A SE 9301666A SE 501248 C2 SE501248 C2 SE 501248C2
Authority
SE
Sweden
Prior art keywords
echo
signal
filters
filter
output
Prior art date
Application number
SE9301666A
Other languages
English (en)
Swedish (sv)
Other versions
SE9301666D0 (sv
SE9301666L (sv
Inventor
Tore Mikael Andre
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 SE9301666A priority Critical patent/SE501248C2/sv
Publication of SE9301666D0 publication Critical patent/SE9301666D0/xx
Priority to BR9406402A priority patent/BR9406402A/pt
Priority to ES94916447T priority patent/ES2160123T3/es
Priority to EP94916447A priority patent/EP0698317B1/fr
Priority to PCT/SE1994/000397 priority patent/WO1994027378A1/fr
Priority to CN94192101A priority patent/CN1038889C/zh
Priority to DE69427693T priority patent/DE69427693T2/de
Priority to AU68098/94A priority patent/AU677335B2/en
Priority to DK94916447T priority patent/DK0698317T3/da
Priority to US08/242,456 priority patent/US5428605A/en
Publication of SE9301666L publication Critical patent/SE9301666L/
Publication of SE501248C2 publication Critical patent/SE501248C2/sv
Priority to NO954557A priority patent/NO310008B1/no
Priority to FI955465A priority patent/FI955465A0/fi

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)
SE9301666A 1993-05-14 1993-05-14 Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter SE501248C2 (sv)

Priority Applications (12)

Application Number Priority Date Filing Date Title
SE9301666A SE501248C2 (sv) 1993-05-14 1993-05-14 Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter
DK94916447T DK0698317T3 (da) 1993-05-14 1994-05-02 Fremgangsmåde og ekkoundertrykker til ekkoundertrykkelse med et antal kaskadekoblede addaptive filtre
DE69427693T DE69427693T2 (de) 1993-05-14 1994-05-02 Verfahren und einrichtung zur echokompensation mit mehreren kaskadierten adaptiven filtern
ES94916447T ES2160123T3 (es) 1993-05-14 1994-05-02 Un metodo y un cancelador de eco para cancelacion de eco con varios filtros adaptables conectados en cascada.
EP94916447A EP0698317B1 (fr) 1993-05-14 1994-05-02 Supresseur d'echo et procede de suppression d'echo a l'aide d'un nombre de filtres adaptatifs montes en cascade
PCT/SE1994/000397 WO1994027378A1 (fr) 1993-05-14 1994-05-02 Supresseur d'echo et procede de suppresion d'echo a l'aide d'un nombre de filtres adaptatifs montes en cascade
CN94192101A CN1038889C (zh) 1993-05-14 1994-05-02 用级联的自适应滤波器进行回波消除的方法和回波消除器
BR9406402A BR9406402A (pt) 1993-05-14 1994-05-02 Processo de supressao de eco e supressor de eco incluindo uma pluralidade de filtros auto-adaptáveis conectados em cascata
AU68098/94A AU677335B2 (en) 1993-05-14 1994-05-02 A method and echo canceller for echo cancellation with a number of cascade -connected adaptive filters
US08/242,456 US5428605A (en) 1993-05-14 1994-05-13 Method and echo canceller for echo cancellation with a number of cascade-connected adaptive filters
NO954557A NO310008B1 (no) 1993-05-14 1995-11-13 FremgangsmÕte og anordning ved ekko-kansellering med en flerhet av kaskadekoblede adaptive filtre
FI955465A FI955465A0 (fi) 1993-05-14 1995-11-13 Menetelmä ja heijastuksenvaimennin heijastuksen vaimentamiseksi useilla kaskadiin kytketyillä adaptiivisilla suodattimilla

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9301666A SE501248C2 (sv) 1993-05-14 1993-05-14 Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter

Publications (3)

Publication Number Publication Date
SE9301666D0 SE9301666D0 (sv) 1993-05-14
SE9301666L SE9301666L (sv) 1994-11-15
SE501248C2 true SE501248C2 (sv) 1994-12-19

Family

ID=20389944

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9301666A SE501248C2 (sv) 1993-05-14 1993-05-14 Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter

Country Status (12)

Country Link
US (1) US5428605A (fr)
EP (1) EP0698317B1 (fr)
CN (1) CN1038889C (fr)
AU (1) AU677335B2 (fr)
BR (1) BR9406402A (fr)
DE (1) DE69427693T2 (fr)
DK (1) DK0698317T3 (fr)
ES (1) ES2160123T3 (fr)
FI (1) FI955465A0 (fr)
NO (1) NO310008B1 (fr)
SE (1) SE501248C2 (fr)
WO (1) WO1994027378A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3395388B2 (ja) * 1994-08-16 2003-04-14 ソニー株式会社 信号適応処理装置及びエコー抑圧装置
US5566167A (en) * 1995-01-04 1996-10-15 Lucent Technologies Inc. Subband echo canceler
US5631899A (en) * 1995-05-31 1997-05-20 Lucent Technologies Inc. Acoustic echo canceler
JP2856113B2 (ja) * 1995-07-10 1999-02-10 日本電気株式会社 エコーキャンセラ
US5664011A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller with adaptive and non-adaptive filters
US5815496A (en) * 1995-09-29 1998-09-29 Lucent Technologies Inc. Cascade echo canceler arrangement
SE505150C3 (sv) 1995-10-18 1997-08-04 Ericsson Telefon Ab L M Adaptivt ekoslaeckningsfoerfarande av dubbelfiltertyp
SE517602C2 (sv) * 1995-10-20 2002-06-25 Ericsson Telefon Ab L M Fastlåst loop
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
DE19801390A1 (de) * 1998-01-16 1999-07-22 Cit Alcatel Einrichtung und Verfahren zur Echounterdrückung mit adaptiven FIR-Filtern
DE19801389A1 (de) * 1998-01-16 1999-07-22 Cit Alcatel Verfahren zur Echounterdrückung mit adaptiven FIR-Filtern
US7424109B1 (en) * 1999-03-25 2008-09-09 Intel Corporation Rapid training echo cancellor for telecommunications system
US6782297B2 (en) * 2001-05-24 2004-08-24 Eric Paul Tabor Methods and apparatus for data smoothing
US7027501B1 (en) * 2001-02-28 2006-04-11 Tripath Technology Inc. Methods and apparatus for adaptive equalization
US7162420B2 (en) * 2002-12-10 2007-01-09 Liberato Technologies, Llc System and method for noise reduction having first and second adaptive filters
JP4297003B2 (ja) * 2004-07-09 2009-07-15 ヤマハ株式会社 適応ハウリングキャンセラ
EP1879181B1 (fr) * 2006-07-11 2014-05-21 Nuance Communications, Inc. Procédé pour la compensation des composants d'un signal audio dans un système de communication dans une voiture et un système pour ça
US8411871B2 (en) * 2007-08-22 2013-04-02 Lantiq Deutschland Gmbh Echo cancellation
US8320553B2 (en) 2008-10-27 2012-11-27 Apple Inc. Enhanced echo cancellation
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
US8873615B2 (en) * 2012-09-19 2014-10-28 Avago Technologies General Ip (Singapore) Pte. Ltd. Method and controller for equalizing a received serial data stream

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574166A (en) * 1983-02-04 1986-03-04 At&T Bell Laboratories Tandem adaptive filter arrangement
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
DE3874997T2 (de) * 1987-07-20 1993-03-25 Nippon Electric Co Echokompensator.
JPH0752859B2 (ja) * 1987-11-06 1995-06-05 日本電気株式会社 エコー除去装置
FR2628918B1 (fr) * 1988-03-15 1990-08-10 France Etat Dispositif annuleur d'echo a filtrage en sous-bandes de frequence
SE463589B (sv) * 1989-04-27 1990-12-10 Ericsson Telefon Ab L M Foerfarande foer att undvika felaktig ekoeliminering och/eller utjaemning till foeljd av olinjaeriteter i en d/a-omvandlare och/eller en a/d-omvandlare i en telekommunikationsanlaeggning, samt anordning foer utoevande av foerfarandet i samband med d/a-omvandling och anordning foer utoevande av foerfarandet i samband med a/d-omvandling

Also Published As

Publication number Publication date
SE9301666D0 (sv) 1993-05-14
AU677335B2 (en) 1997-04-17
DK0698317T3 (da) 2001-10-15
EP0698317B1 (fr) 2001-07-11
CN1123072A (zh) 1996-05-22
DE69427693D1 (de) 2001-08-16
DE69427693T2 (de) 2002-05-02
NO954557D0 (no) 1995-11-13
BR9406402A (pt) 1997-05-27
NO954557L (no) 1996-01-12
ES2160123T3 (es) 2001-11-01
WO1994027378A1 (fr) 1994-11-24
FI955465A (fi) 1995-11-13
CN1038889C (zh) 1998-06-24
SE9301666L (sv) 1994-11-15
NO310008B1 (no) 2001-04-30
AU6809894A (en) 1994-12-12
EP0698317A1 (fr) 1996-02-28
FI955465A0 (fi) 1995-11-13
US5428605A (en) 1995-06-27

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