CA2061527A1 - Methode et dispositif servant au controle des coefficients d'un filtre adaptable - Google Patents

Methode et dispositif servant au controle des coefficients d'un filtre adaptable

Info

Publication number
CA2061527A1
CA2061527A1 CA2061527A CA2061527A CA2061527A1 CA 2061527 A1 CA2061527 A1 CA 2061527A1 CA 2061527 A CA2061527 A CA 2061527A CA 2061527 A CA2061527 A CA 2061527A CA 2061527 A1 CA2061527 A1 CA 2061527A1
Authority
CA
Canada
Prior art keywords
adaptive filter
coefficients
signal
controlling
output
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2061527A
Other languages
English (en)
Other versions
CA2061527C (fr
Inventor
Akihiko Sugiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2061527A1 publication Critical patent/CA2061527A1/fr
Application granted granted Critical
Publication of CA2061527C publication Critical patent/CA2061527C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H21/0043—Adaptive algorithms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H2021/007—Computation saving measures; Accelerating measures
    • H03H2021/0076—Measures relating to the convergence time
    • H03H2021/0078—Measures relating to the convergence time varying the step size

Landscapes

  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
CA002061527A 1991-02-20 1992-02-19 Methode et dispositif servant au controle des coefficients d'un filtre adaptable Expired - Fee Related CA2061527C (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP4900291 1991-02-20
JP49002/1991 1991-02-20
JP195882/1991 1991-07-09
JP19588291 1991-07-09
US08/143,239 US5329472A (en) 1991-02-20 1993-10-22 Method and apparatus for controlling coefficients of adaptive filter

Publications (2)

Publication Number Publication Date
CA2061527A1 true CA2061527A1 (fr) 1992-08-21
CA2061527C CA2061527C (fr) 1995-12-12

Family

ID=27293487

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002061527A Expired - Fee Related CA2061527C (fr) 1991-02-20 1992-02-19 Methode et dispositif servant au controle des coefficients d'un filtre adaptable

Country Status (4)

Country Link
US (2) US5329472A (fr)
EP (1) EP0500096B1 (fr)
JP (1) JP2842026B2 (fr)
CA (1) CA2061527C (fr)

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US5546395A (en) 1993-01-08 1996-08-13 Multi-Tech Systems, Inc. Dynamic selection of compression rate for a voice compression algorithm in a voice over data modem
US5535204A (en) 1993-01-08 1996-07-09 Multi-Tech Systems, Inc. Ringdown and ringback signalling for a computer-based multifunction personal communications system
US5864560A (en) 1993-01-08 1999-01-26 Multi-Tech Systems, Inc. Method and apparatus for mode switching in a voice over data computer-based personal communications system
US5452289A (en) 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction personal communications system
US6009082A (en) 1993-01-08 1999-12-28 Multi-Tech Systems, Inc. Computer-based multifunction personal communication system with caller ID
US5453986A (en) 1993-01-08 1995-09-26 Multi-Tech Systems, Inc. Dual port interface for a computer-based multifunction personal communication system
US5812534A (en) 1993-01-08 1998-09-22 Multi-Tech Systems, Inc. Voice over data conferencing for a computer-based personal communications system
JPH06318885A (ja) * 1993-03-11 1994-11-15 Nec Corp 帯域分割適応フィルタによる未知システム同定の方法及び装置
KR100248266B1 (ko) * 1994-03-07 2000-03-15 김영환 유한충격응답적응디지탈필터의 탭계수갱신장치
US5757801A (en) 1994-04-19 1998-05-26 Multi-Tech Systems, Inc. Advanced priority statistical multiplexer
US5682386A (en) 1994-04-19 1997-10-28 Multi-Tech Systems, Inc. Data/voice/fax compression multiplexer
DE69526892T2 (de) * 1994-09-01 2002-12-19 Nec Corp Bündelerreger mit adaptiven Filtern mit beschränkten Koeffizienten zur Unterdrückung von Interferenzsignalen
JP2728120B2 (ja) * 1995-01-24 1998-03-18 日本電気株式会社 エコーキャンセラ装置
JPH08250982A (ja) * 1995-03-10 1996-09-27 Fujitsu Ltd フィルタ係数の推定装置
JP3359460B2 (ja) * 1995-03-20 2002-12-24 沖電気工業株式会社 適応フィルタ及びエコーキャンセラ
US5745396A (en) * 1995-04-28 1998-04-28 Lucent Technologies Inc. Pipelined adaptive IIR filter
JP2850814B2 (ja) * 1995-12-15 1999-01-27 日本電気株式会社 適応フィルタによる未知システム同定の方法及び装置
JP2921472B2 (ja) * 1996-03-15 1999-07-19 日本電気株式会社 音声および雑音の除去装置、音声認識装置
EP0951798B1 (fr) * 1996-04-03 2002-07-03 BRITISH TELECOMMUNICATIONS public limited company Correction acoustique en retour
US5921971A (en) * 1996-09-13 1999-07-13 Boston Scientific Corporation Single operator exchange biliary catheter
KR100307662B1 (ko) * 1998-10-13 2001-12-01 윤종용 가변적인수행속도를지원하는에코제거장치및방법
US6526093B1 (en) * 1999-03-04 2003-02-25 Mitsubishi Electric Research Laboratories, Inc Method and apparatus for equalizing a digital signal received via multiple transmission paths
US6707912B2 (en) * 1999-03-11 2004-03-16 Motorola, Inc. Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller
US6618701B2 (en) * 1999-04-19 2003-09-09 Motorola, Inc. Method and system for noise suppression using external voice activity detection
US7065166B2 (en) * 2002-12-19 2006-06-20 Texas Instruments Incorporated Wireless receiver and method for determining a representation of noise level of a signal
JP2006203357A (ja) * 2005-01-18 2006-08-03 Oki Electric Ind Co Ltd エコーキャンセラ
US7835236B2 (en) 2005-04-06 2010-11-16 Sony Corporation Servo control apparatus and method, and disk recording or playback apparatus
JP4534859B2 (ja) * 2005-05-06 2010-09-01 ソニー株式会社 サーボ制御装置及びサーボ制御方法、並びに光ディスク記録又は再生装置
US7603258B2 (en) * 2005-11-03 2009-10-13 Gas Technology Institute Noise reduction and estimation of pipeline signals
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
DE102008039329A1 (de) * 2008-01-25 2009-07-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Berechnung von Steuerinformationen für ein Echounterdrückungsfilter und Vorrichtung und Verfahren zur Berechnung eines Verzögerungswerts
WO2012049986A1 (fr) * 2010-10-12 2012-04-19 日本電気株式会社 Dispositif de traitement de signal, procédé de traitement de signal et programme de traitement de signal
CN102227096B (zh) * 2011-05-20 2013-10-30 哈尔滨工程大学 一种非高斯环境下的变步长最小p-范数系统辨识方法
EP2706670A3 (fr) * 2012-09-06 2014-05-07 ST-Ericsson SA Procédé dans un filtre de prédiction et un tel filtre de prédiction
US9754605B1 (en) * 2016-06-09 2017-09-05 Amazon Technologies, Inc. Step-size control for multi-channel acoustic echo canceller
CN110048694B (zh) * 2019-04-22 2022-09-23 哈尔滨理工大学 基于变元步长的随机傅里叶特征核最小均方算法
US10978086B2 (en) 2019-07-19 2021-04-13 Apple Inc. Echo cancellation using a subset of multiple microphones as reference channels

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7905577A (nl) * 1979-07-18 1981-01-20 Philips Nv Inrichting met een niet-recursieffilter.
US4791390A (en) * 1982-07-01 1988-12-13 Sperry Corporation MSE variable step adaptive filter
US4591669A (en) * 1984-09-26 1986-05-27 At&T Bell Laboratories Adaptive filter update gain normalization
US4773034A (en) * 1985-05-09 1988-09-20 American Telephone And Telegraph Company Adaptive equalizer utilizing a plurality of multiplier-accumulator devices
US4789994A (en) * 1987-08-12 1988-12-06 American Telephone And Telegraph Company, At&T Bell Laboratories Adaptive equalizer using precursor error signal for convergence control
US4811360A (en) * 1988-01-14 1989-03-07 General Datacomm, Inc. Apparatus and method for adaptively optimizing equalization delay of data communication equipment
US4989170A (en) * 1988-06-09 1991-01-29 National Semiconductor Corporation Hybrid stochastic gradient for convergence of adaptive filter
US5058047A (en) * 1989-05-30 1991-10-15 Advanced Micro Devices, Inc. System and method for providing digital filter coefficients
US5168459A (en) * 1991-01-03 1992-12-01 Hewlett-Packard Company Adaptive filter using continuous cross-correlation

Also Published As

Publication number Publication date
US5329472A (en) 1994-07-12
CA2061527C (fr) 1995-12-12
EP0500096B1 (fr) 1997-10-22
JPH05268105A (ja) 1993-10-15
JP2842026B2 (ja) 1998-12-24
USRE35867E (en) 1998-08-04
EP0500096A1 (fr) 1992-08-26

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