DE60236367D1 - Echolöscher, der eine weitere reduktion des restechos sicherstellt - Google Patents

Echolöscher, der eine weitere reduktion des restechos sicherstellt

Info

Publication number
DE60236367D1
DE60236367D1 DE60236367T DE60236367T DE60236367D1 DE 60236367 D1 DE60236367 D1 DE 60236367D1 DE 60236367 T DE60236367 T DE 60236367T DE 60236367 T DE60236367 T DE 60236367T DE 60236367 D1 DE60236367 D1 DE 60236367D1
Authority
DE
Germany
Prior art keywords
restecho
echolöscher
another reduction
ensures another
ensures
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 - Lifetime
Application number
DE60236367T
Other languages
English (en)
Inventor
Syuji Kubota
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of DE60236367D1 publication Critical patent/DE60236367D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
DE60236367T 2001-11-20 2002-11-19 Echolöscher, der eine weitere reduktion des restechos sicherstellt Expired - Lifetime DE60236367D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001355299A JP4282260B2 (ja) 2001-11-20 2001-11-20 エコーキャンセラ
PCT/JP2002/012068 WO2003044978A1 (en) 2001-11-20 2002-11-19 Echo canceller ensuring further reduction in residual echo

Publications (1)

Publication Number Publication Date
DE60236367D1 true DE60236367D1 (de) 2010-06-24

Family

ID=19167024

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60236367T Expired - Lifetime DE60236367D1 (de) 2001-11-20 2002-11-19 Echolöscher, der eine weitere reduktion des restechos sicherstellt

Country Status (5)

Country Link
US (1) US7203308B2 (de)
EP (1) EP1446894B1 (de)
JP (1) JP4282260B2 (de)
DE (1) DE60236367D1 (de)
WO (1) WO2003044978A1 (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7856097B2 (en) * 2004-06-17 2010-12-21 Panasonic Corporation Echo canceling apparatus, telephone set using the same, and echo canceling method
JP4150798B2 (ja) * 2004-07-28 2008-09-17 国立大学法人徳島大学 デジタルフィルタリング方法、デジタルフィルタ装置、デジタルフィルタプログラム及びコンピュータで読み取り可能な記録媒体
US8457614B2 (en) 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
US8275120B2 (en) * 2006-05-30 2012-09-25 Microsoft Corp. Adaptive acoustic echo cancellation
TW200830706A (en) * 2007-01-12 2008-07-16 Sanyo Electric Co Filter coefficient setting device and echo prevention device
US8050398B1 (en) 2007-10-31 2011-11-01 Clearone Communications, Inc. Adaptive conferencing pod sidetone compensator connecting to a telephonic device having intermittent sidetone
US8199927B1 (en) 2007-10-31 2012-06-12 ClearOnce Communications, Inc. Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter
CN101453244A (zh) * 2007-11-28 2009-06-10 博通集成电路（上海）有限公司 线回波消除器
US8996365B2 (en) 2009-03-19 2015-03-31 Yugengaisya Cepstrum Howling canceller
JP5493817B2 (ja) * 2009-12-17 2014-05-14 沖電気工業株式会社 エコーキャンセラ
US8515089B2 (en) 2010-06-04 2013-08-20 Apple Inc. Active noise cancellation decisions in a portable audio device
US9099077B2 (en) 2010-06-04 2015-08-04 Apple Inc. Active noise cancellation decisions using a degraded reference
US8824437B2 (en) * 2011-03-02 2014-09-02 Ricoh Company, Ltd. Wireless communications device, electronic apparatus, and methods for determining and updating access point
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
CN105516859B (zh) * 2015-11-27 2019-04-16 深圳Tcl数字技术有限公司 消除回声的方法和系统
US10367948B2 (en) 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
CN112335261B (zh) 2018-06-01 2023-07-18 舒尔获得控股公司 图案形成麦克风阵列
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
EP3854108A1 (de) 2018-09-20 2021-07-28 Shure Acquisition Holdings, Inc. Einstellbare nockenform für arraymikrofone
EP3942845A1 (de) 2019-03-21 2022-01-26 Shure Acquisition Holdings, Inc. Autofokus, autofokus in regionen und autoplatzierung von strahlgeformten mikrofonkeulen mit hemmfunktion
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
CN113841419A (zh) 2019-03-21 2021-12-24 舒尔获得控股公司 天花板阵列麦克风的外壳及相关联设计特征
WO2020237206A1 (en) 2019-05-23 2020-11-26 Shure Acquisition Holdings, Inc. Steerable speaker array, system, and method for the same
CN114051637A (zh) 2019-05-31 2022-02-15 舒尔获得控股公司 集成语音及噪声活动检测的低延时自动混波器
JP2020202448A (ja) * 2019-06-07 2020-12-17 ヤマハ株式会社 音響装置および音響処理方法
CN114467312A (zh) 2019-08-23 2022-05-10 舒尔获得控股公司 具有改进方向性的二维麦克风阵列
US11506771B2 (en) * 2019-09-24 2022-11-22 GE Precision Healthcare LLC System and methods for flash suppression in ultrasound imaging
US11552611B2 (en) 2020-02-07 2023-01-10 Shure Acquisition Holdings, Inc. System and method for automatic adjustment of reference gain
US11706562B2 (en) 2020-05-29 2023-07-18 Shure Acquisition Holdings, Inc. Transducer steering and configuration systems and methods using a local positioning system
JP2024505068A (ja) 2021-01-28 2024-02-02 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 ハイブリッドオーディオビーム形成システム

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245459A (en) 1990-06-20 1992-01-02 Motorola Inc Echo canceller with adaptive voice switch attenuation
JPH04150127A (ja) 1990-10-09 1992-05-22 Oki Electric Ind Co Ltd 電話機の通話回路
JPH0638253A (ja) * 1992-05-21 1994-02-10 Toshiba Corp エコーキャンセラ
JP3407455B2 (ja) * 1995-02-15 2003-05-19 松下電器産業株式会社 エコーキャンセラ
US5668794A (en) * 1995-09-29 1997-09-16 Crystal Semiconductor Variable gain echo suppressor
JP3452341B2 (ja) * 1995-12-05 2003-09-29 株式会社リコー エコーキャンセラ
SE505692C2 (sv) * 1995-12-18 1997-09-29 Ericsson Telefon Ab L M Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal
JPH09275367A (ja) 1996-04-08 1997-10-21 Nec Corp エコーキャンセラ装置
JPH10285083A (ja) 1997-04-04 1998-10-23 Toshiba Corp 音声通信装置
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
US6961423B2 (en) * 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering

Also Published As

Publication number Publication date
US7203308B2 (en) 2007-04-10
US20040170271A1 (en) 2004-09-02
EP1446894A1 (de) 2004-08-18
EP1446894B1 (de) 2010-05-12
WO2003044978A1 (en) 2003-05-30
EP1446894A4 (de) 2006-02-01
JP2003158476A (ja) 2003-05-30
JP4282260B2 (ja) 2009-06-17

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Legal Events

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