DE3880228D1 - Digitaler echokompensator. - Google Patents

Digitaler echokompensator.

Info

Publication number
DE3880228D1
DE3880228D1 DE8888201446T DE3880228T DE3880228D1 DE 3880228 D1 DE3880228 D1 DE 3880228D1 DE 8888201446 T DE8888201446 T DE 8888201446T DE 3880228 T DE3880228 T DE 3880228T DE 3880228 D1 DE3880228 D1 DE 3880228D1
Authority
DE
Germany
Prior art keywords
digital echo
echo compensator
compensator
digital
echo
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.)
Expired - Fee Related
Application number
DE8888201446T
Other languages
English (en)
Other versions
DE3880228T2 (de
Inventor
Gerwen Petrus Josephus Van
De Laar Franciscus Antoniu Van
Hendrik Jan Kotmans
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE3880228D1 publication Critical patent/DE3880228D1/de
Application granted granted Critical
Publication of DE3880228T2 publication Critical patent/DE3880228T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • 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
    • H04B3/237—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 using two adaptive filters, e.g. for near end and for end echo cancelling
    • 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
    • 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
    • H04B3/234—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 using double talk detection
    • 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
    • H04B3/238—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 using initial training sequence
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/901—Noise or unwanted signal reduction in nonseismic receiving system

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE88201446T 1987-07-10 1988-07-08 Digitaler Echokompensator. Expired - Fee Related DE3880228T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8701633A NL8701633A (nl) 1987-07-10 1987-07-10 Digitale echocompensator.

Publications (2)

Publication Number Publication Date
DE3880228D1 true DE3880228D1 (de) 1993-05-19
DE3880228T2 DE3880228T2 (de) 1993-10-14

Family

ID=19850292

Family Applications (1)

Application Number Title Priority Date Filing Date
DE88201446T Expired - Fee Related DE3880228T2 (de) 1987-07-10 1988-07-08 Digitaler Echokompensator.

Country Status (7)

Country Link
US (1) US4903247A (de)
EP (1) EP0301627B1 (de)
JP (1) JP2936101B2 (de)
KR (1) KR960004696B1 (de)
CA (1) CA1318003C (de)
DE (1) DE3880228T2 (de)
NL (1) NL8701633A (de)

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NL9001016A (nl) * 1990-04-27 1991-11-18 Philips Nv Digitale echocompensator met een dubbelspraakdetector.
US5272656A (en) * 1990-09-21 1993-12-21 Cambridge Signal Technologies, Inc. System and method of producing adaptive FIR digital filter with non-linear frequency resolution
ES2038904B1 (es) * 1991-09-10 1995-01-16 Alcatel Standard Electrica Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.
CA2060667C (en) * 1992-02-05 1998-12-08 Paul Marc Yatrou Adaptive sparse echo canceller using a sub-rate filter for active tap selection
US5365583A (en) * 1992-07-02 1994-11-15 Polycom, Inc. Method for fail-safe operation in a speaker phone system
US5307405A (en) 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
US5329587A (en) * 1993-03-12 1994-07-12 At&T Bell Laboratories Low-delay subband adaptive filter
JPH06349541A (ja) * 1993-06-14 1994-12-22 Sumitomo Wiring Syst Ltd 防水コネクタ用ゴム栓
DE4328139A1 (de) * 1993-08-21 1995-02-23 Philips Patentverwaltung Schaltungsanordnung zur Echoauslöschung
US5664021A (en) * 1993-10-05 1997-09-02 Picturetel Corporation Microphone system for teleconferencing system
JPH07193619A (ja) * 1993-10-27 1995-07-28 Canon Inc デジタル電話機及びその動作方法
US6111935A (en) * 1993-10-27 2000-08-29 Canon Kabushiki Kaisha Adaptive expansion table in a digital telephone receiver
ZA95599B (en) * 1994-02-28 1996-02-06 Qualcomm Inc Doubletalk detection by means of spectral content
US5660255A (en) * 1994-04-04 1997-08-26 Applied Power, Inc. Stiff actuator active vibration isolation system
WO1995028034A2 (en) * 1994-04-12 1995-10-19 Philips Electronics N.V. Signal amplifier system with improved echo cancellation
EP0708535A4 (de) * 1994-05-06 2004-09-29 Nippon Telegraph & Telephone Verfahren und gerät zur detektion von doppelsprechen, sowie echokompensator
DE4426226A1 (de) 1994-07-23 1996-01-25 Philips Patentverwaltung Schaltungsanordnung zum Übertragen von codierten Sprachsignalen
US5526426A (en) * 1994-11-08 1996-06-11 Signalworks System and method for an efficiently constrained frequency-domain adaptive filter
DE4445877A1 (de) 1994-12-22 1996-06-27 Philips Patentverwaltung Verfahren und Anordnung zur Echokompensation
US5748752A (en) * 1994-12-23 1998-05-05 Reames; James B. Adaptive voice enhancing system
FR2729804B1 (fr) * 1995-01-24 1997-04-04 Matra Communication Annuleur d'echo acoustique a filtre adaptatif et passage dans le domaine frequentiel
US5664011A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller with adaptive and non-adaptive filters
US5663955A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller system with shared coefficient memory
US5675644A (en) * 1995-09-26 1997-10-07 Qualcomm Incorporated Method and apparatus for canceling echo accounting for delay variations
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DE69738288T2 (de) * 1996-05-31 2008-09-25 Koninklijke Philips Electronics N.V. Einrichtung zur unterdrückung einer störenden komponente eines eingangssignals
US6044068A (en) * 1996-10-01 2000-03-28 Telefonaktiebolaget Lm Ericsson Silence-improved echo canceller
US6052462A (en) * 1997-07-10 2000-04-18 Tellabs Operations, Inc. Double talk detection and echo control circuit
SG71035A1 (en) * 1997-08-01 2000-03-21 Bitwave Pte Ltd Acoustic echo canceller
EP1022865B1 (de) 1997-09-16 2011-03-30 Sanyo Electric Co., Ltd. Echounterdrücker und echounterdrückungsverfahren
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
DE19802724A1 (de) * 1998-01-24 1999-07-29 Bosch Gmbh Robert Überwachungseinrichtung für Signal-Echo-Sensoren
US6173059B1 (en) 1998-04-24 2001-01-09 Gentner Communications Corporation Teleconferencing system with visual feedback
US6269161B1 (en) 1999-05-20 2001-07-31 Signalworks, Inc. System and method for near-end talker detection by spectrum analysis
JP4700871B2 (ja) 1999-06-24 2011-06-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 音響エコー及びノイズ除去
KR100329427B1 (ko) * 1999-07-16 2002-03-20 손경식 스테레오 음향반향 제거기 및 그 제거방법
US6810076B1 (en) * 2000-07-07 2004-10-26 Silicon Integrated Systems Corporation Efficient echo canceller for ADSL applications
US20020101982A1 (en) * 2001-01-30 2002-08-01 Hammam Elabd Line echo canceller scalable to multiple voice channels/ports
EP1363408A1 (de) * 2002-05-17 2003-11-19 STMicroelectronics N.V. Apparat und Methode zur Echounterdrückung
DE10230101A1 (de) 2002-07-04 2004-01-29 Siemens Ag Verfahren zur Leitungsanpassung
US7543009B2 (en) * 2002-12-24 2009-06-02 Stmicroelectronics Belgium Nv Fractional fourier transform convolver arrangement
US7027962B2 (en) * 2003-11-19 2006-04-11 International Business Machines Corporation System and method for self-configuring and self-optimizing filters
US7480377B2 (en) * 2003-12-31 2009-01-20 Intel Corporation Dual adaptive filter apparatus and method
US7903137B2 (en) * 2004-10-15 2011-03-08 Lifesize Communications, Inc. Videoconferencing echo cancellers
US8116500B2 (en) * 2004-10-15 2012-02-14 Lifesize Communications, Inc. Microphone orientation and size in a speakerphone
US20060132595A1 (en) * 2004-10-15 2006-06-22 Kenoyer Michael L Speakerphone supporting video and audio features
US7760887B2 (en) * 2004-10-15 2010-07-20 Lifesize Communications, Inc. Updating modeling information based on online data gathering
US7720236B2 (en) * 2004-10-15 2010-05-18 Lifesize Communications, Inc. Updating modeling information based on offline calibration experiments
US7970151B2 (en) * 2004-10-15 2011-06-28 Lifesize Communications, Inc. Hybrid beamforming
US7720232B2 (en) * 2004-10-15 2010-05-18 Lifesize Communications, Inc. Speakerphone
US7826624B2 (en) * 2004-10-15 2010-11-02 Lifesize Communications, Inc. Speakerphone self calibration and beam forming
ATE426875T1 (de) * 2004-10-18 2009-04-15 Koninkl Philips Electronics Nv System zur uberwachung einer person
US7991167B2 (en) * 2005-04-29 2011-08-02 Lifesize Communications, Inc. Forming beams with nulls directed at noise sources
US7593539B2 (en) * 2005-04-29 2009-09-22 Lifesize Communications, Inc. Microphone and speaker arrangement in speakerphone
US7970150B2 (en) * 2005-04-29 2011-06-28 Lifesize Communications, Inc. Tracking talkers using virtual broadside scan and directed beams
WO2007077536A1 (en) 2006-01-06 2007-07-12 Koninklijke Philips Electronics N.V. Acoustic echo canceller
US7304912B2 (en) * 2006-02-01 2007-12-04 The United States Of America As Represented By The Secretary Of The Navy Scale adaptive filtering
US8284870B1 (en) 2006-02-07 2012-10-09 Link—A—Media Devices Corporation Timing loop
US7917563B1 (en) * 2006-02-07 2011-03-29 Link—A—Media Devices Corporation Read channel processor
EP1827002A1 (de) * 2006-02-22 2007-08-29 Alcatel Lucent Verfahren zur Anpassungsregelung eines Filters
US8302456B2 (en) 2006-02-23 2012-11-06 Asylum Research Corporation Active damping of high speed scanning probe microscope components
JP4769161B2 (ja) * 2006-10-11 2011-09-07 日本電信電話株式会社 エコーキャンセラ装置、その方法、そのプログラム、およびその記録媒体
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
CN102131014A (zh) * 2010-01-13 2011-07-20 歌尔声学股份有限公司 时频域联合回声消除装置及方法
WO2011129725A1 (en) * 2010-04-12 2011-10-20 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for noise cancellation in a speech encoder
US9514763B2 (en) * 2013-05-15 2016-12-06 Lenovo (Singapore) Pte. Ltd. Noise reduction via tuned acoustic echo cancellation
US9383388B2 (en) 2014-04-21 2016-07-05 Oxford Instruments Asylum Research, Inc Automated atomic force microscope and the operation thereof
US9565493B2 (en) 2015-04-30 2017-02-07 Shure Acquisition Holdings, Inc. Array microphone system and method of assembling the same
US9554207B2 (en) 2015-04-30 2017-01-24 Shure Acquisition Holdings, Inc. Offset cartridge microphones
US10367948B2 (en) 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
EP3570429A1 (de) 2018-05-15 2019-11-20 Vacon Oy Vorrichtung und verfahren zur schätzung der indukatenzen einer elektrischen maschine
EP3804356A1 (de) 2018-06-01 2021-04-14 Shure Acquisition Holdings, Inc. Musterbildende mikrofonanordnung
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
CN112889296A (zh) 2018-09-20 2021-06-01 舒尔获得控股公司 用于阵列麦克风的可调整的波瓣形状
JP2022526761A (ja) 2019-03-21 2022-05-26 シュアー アクイジッション ホールディングス インコーポレイテッド 阻止機能を伴うビーム形成マイクロフォンローブの自動集束、領域内自動集束、および自動配置
US11558693B2 (en) 2019-03-21 2023-01-17 Shure Acquisition Holdings, Inc. Auto focus, auto focus within regions, and auto placement of beamformed microphone lobes with inhibition and voice activity detection functionality
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US3787645A (en) * 1971-05-19 1974-01-22 Nippon Electric Co Echo canceller having two echo path models
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
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
AU4695485A (en) * 1984-09-21 1986-03-27 Alcatel N.V. Digital hybrid
NL8601604A (nl) * 1986-06-20 1988-01-18 Philips Nv Frequentie-domein blok-adaptief digitaal filter.

Also Published As

Publication number Publication date
JP2936101B2 (ja) 1999-08-23
US4903247A (en) 1990-02-20
CA1318003C (en) 1993-05-18
NL8701633A (nl) 1989-02-01
KR890003156A (ko) 1989-04-13
EP0301627A1 (de) 1989-02-01
DE3880228T2 (de) 1993-10-14
KR960004696B1 (en) 1996-04-11
JPS6434021A (en) 1989-02-03
EP0301627B1 (de) 1993-04-14

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8327 Change in the person/name/address of the patent owner

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V., EINDHOVEN, N

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee