BR9710475A - Processo e circuito para cancelar um sinal de eco - Google Patents

Processo e circuito para cancelar um sinal de eco

Info

Publication number
BR9710475A
BR9710475A BR9710475A BR9710475A BR9710475A BR 9710475 A BR9710475 A BR 9710475A BR 9710475 A BR9710475 A BR 9710475A BR 9710475 A BR9710475 A BR 9710475A BR 9710475 A BR9710475 A BR 9710475A
Authority
BR
Brazil
Prior art keywords
cancel
circuit
echo signal
echo
signal
Prior art date
Application number
BR9710475A
Other languages
English (en)
Inventor
Eric Douglas Romesburg
Original Assignee
Ericsson Inc
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 Inc filed Critical Ericsson Inc
Publication of BR9710475A publication Critical patent/BR9710475A/pt

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/015—Reducing echo effects
    • 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
    • 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
BR9710475A 1996-07-24 1997-07-21 Processo e circuito para cancelar um sinal de eco BR9710475A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/685,495 US5796819A (en) 1996-07-24 1996-07-24 Echo canceller for non-linear circuits
PCT/US1997/012717 WO1998004079A2 (en) 1996-07-24 1997-07-21 Echo canceler for non-linear circuits

Publications (1)

Publication Number Publication Date
BR9710475A true BR9710475A (pt) 1999-08-17

Family

ID=24752439

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9710475A BR9710475A (pt) 1996-07-24 1997-07-21 Processo e circuito para cancelar um sinal de eco

Country Status (13)

Country Link
US (1) US5796819A (pt)
EP (1) EP0914721B1 (pt)
JP (1) JP4046197B2 (pt)
KR (1) KR100338657B1 (pt)
CN (1) CN1169312C (pt)
AU (1) AU719049B2 (pt)
BR (1) BR9710475A (pt)
DE (1) DE69709363T2 (pt)
EE (1) EE03842B1 (pt)
HK (1) HK1019982A1 (pt)
MY (1) MY122083A (pt)
PL (1) PL185318B1 (pt)
WO (1) WO1998004079A2 (pt)

Families Citing this family (152)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6256394B1 (en) * 1996-01-23 2001-07-03 U.S. Philips Corporation Transmission system for correlated signals
US6301357B1 (en) * 1996-12-31 2001-10-09 Ericsson Inc. AC-center clipper for noise and echo suppression in a communications system
KR100233463B1 (ko) * 1997-03-07 1999-12-01 윤종용 반향제거장치 및 방법
JP3396393B2 (ja) * 1997-04-30 2003-04-14 沖電気工業株式会社 エコー・雑音成分除去装置
JP3541339B2 (ja) * 1997-06-26 2004-07-07 富士通株式会社 マイクロホンアレイ装置
US6097943A (en) * 1997-07-02 2000-08-01 Telefonaktiebolaget L M Ericsson Application bound parameter storage
US6108412A (en) * 1997-10-07 2000-08-22 Nortel Networks Corporation Adaptive echo cancelling system for telephony applications
US6181793B1 (en) * 1997-11-14 2001-01-30 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved coefficient transfer
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
US6240180B1 (en) * 1997-11-14 2001-05-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having split adaptive gain settings
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
US6256384B1 (en) * 1997-12-02 2001-07-03 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for cancelling echo originating from a mobile terminal
US6278377B1 (en) 1999-08-25 2001-08-21 Donnelly Corporation Indicator for vehicle accessory
US6505057B1 (en) * 1998-01-23 2003-01-07 Digisonix Llc Integrated vehicle voice enhancement system and hands-free cellular telephone system
US6549627B1 (en) * 1998-01-30 2003-04-15 Telefonaktiebolaget Lm Ericsson Generating calibration signals for an adaptive beamformer
JP3267556B2 (ja) * 1998-02-18 2002-03-18 沖電気工業株式会社 エコー除去装置および送話器
CA2245411A1 (en) * 1998-08-20 2000-02-20 Mitel Corporation Echo canceller with compensation for codec limiting effects
FR2785482B1 (fr) * 1998-10-28 2000-11-24 France Telecom Systeme acoustique pourvu de moyens pour reduire l'echo resultant du couplage acoustique entre son moyen de captage et son moyen de restitution
JP3774580B2 (ja) * 1998-11-12 2006-05-17 アルパイン株式会社 音声入力装置
US6381224B1 (en) * 1999-03-31 2002-04-30 Motorola, Inc. Method and apparatus for controlling a full-duplex communication system
US6563925B1 (en) * 1999-04-07 2003-05-13 Ericsson Inc. Method and apparatus for space-time echo cancellation
US7146013B1 (en) * 1999-04-28 2006-12-05 Alpine Electronics, Inc. Microphone system
US6678254B1 (en) 1999-05-03 2004-01-13 Nortel Networks Limited Method and communication device for optimizing echo cancellation
US6480824B2 (en) 1999-06-04 2002-11-12 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for canceling noise in a microphone communications path using an electrical equivalence reference signal
US6608904B1 (en) 1999-06-04 2003-08-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for canceling interference in a loudspeaker communication path through adaptive discrimination
GB2350969B (en) * 1999-06-07 2003-11-05 Ericsson Telefon Ab L M Loudspeaker volume range control
WO2001043490A2 (en) * 1999-12-09 2001-06-14 Frederick Johannes Bruwer Speech distribution system
US7120261B1 (en) 1999-11-19 2006-10-10 Gentex Corporation Vehicle accessory microphone
US7447320B2 (en) * 2001-02-14 2008-11-04 Gentex Corporation Vehicle accessory microphone
US8682005B2 (en) 1999-11-19 2014-03-25 Gentex Corporation Vehicle accessory microphone
US6473733B1 (en) * 1999-12-01 2002-10-29 Research In Motion Limited Signal enhancement for voice coding
US6760435B1 (en) * 2000-02-08 2004-07-06 Lucent Technologies Inc. Method and apparatus for network speech enhancement
US20010033649A1 (en) * 2000-02-08 2001-10-25 Cetacean Networks, Inc. Speakerphone accessory for a telephone instrument
DE10043064B4 (de) * 2000-09-01 2004-07-08 Dietmar Dr. Ruwisch Verfahren und Vorrichtung zur Elimination von Lautsprecherinterferenzen aus Mikrofonsignalen
FR2828327B1 (fr) * 2000-10-03 2003-12-12 France Telecom Procede et dispositif de reduction d'echo
GB2367730B (en) * 2000-10-06 2005-04-27 Mitel Corp Method and apparatus for minimizing far-end speech effects in hands-free telephony systems using acoustic beamforming
US7039197B1 (en) * 2000-10-19 2006-05-02 Lear Corporation User interface for communication system
US7171003B1 (en) * 2000-10-19 2007-01-30 Lear Corporation Robust and reliable acoustic echo and noise cancellation system for cabin communication
US6963649B2 (en) * 2000-10-24 2005-11-08 Adaptive Technologies, Inc. Noise cancelling microphone
MXPA03007128A (es) 2001-02-14 2003-11-18 Gentex Corp Microfono para accesorio de vehiculo.
PL203322B1 (pl) * 2001-03-23 2009-09-30 Nipro Corp Zespół igły do zastrzyków
WO2003017718A1 (en) * 2001-08-13 2003-02-27 Nanyang Technological University, Centre For Signal Processing Post-processing scheme for adaptive directional microphone system with noise/interference suppression
GB2379122B (en) * 2001-08-29 2003-07-16 Pama & Co Ltd Improvements in and relating to mobile phone support apparatus
JP4728537B2 (ja) * 2001-09-14 2011-07-20 株式会社ホンダアクセス ブルートゥース通信システム
US7027591B2 (en) * 2002-10-16 2006-04-11 Ericsson Inc. Integrated noise cancellation and residual echo suppression
US7272224B1 (en) 2003-03-03 2007-09-18 Apple Inc. Echo cancellation
WO2005076662A1 (en) * 2004-01-07 2005-08-18 Koninklijke Philips Electronics N.V. Audio system providing for filter coefficient copying
US20070183618A1 (en) * 2004-02-10 2007-08-09 Masamitsu Ishii Moving object equipped with ultra-directional speaker
EP1591995B1 (en) * 2004-04-29 2019-06-19 Harman Becker Automotive Systems GmbH Indoor communication system for a vehicular cabin
DK200401280A (da) * 2004-08-24 2006-02-25 Oticon As Lavfrekvens fase matchning til mikrofoner
US7894598B2 (en) * 2004-12-14 2011-02-22 Nuance Communications, Inc. System for limiting receive audio
US8509703B2 (en) * 2004-12-22 2013-08-13 Broadcom Corporation Wireless telephone with multiple microphones and multiple description transmission
US20060147063A1 (en) * 2004-12-22 2006-07-06 Broadcom Corporation Echo cancellation in telephones with multiple microphones
US20060133621A1 (en) * 2004-12-22 2006-06-22 Broadcom Corporation Wireless telephone having multiple microphones
JP4215015B2 (ja) * 2005-03-18 2009-01-28 ヤマハ株式会社 ハウリングキャンセラ及びこれを備えた拡声装置
JP4734127B2 (ja) * 2005-03-23 2011-07-27 三洋電機株式会社 エコー防止回路、デジタル信号処理回路、エコー防止回路のフィルタ係数設定方法、デジタル信号処理回路のフィルタ係数設定方法、エコー防止回路のフィルタ係数を設定するためのプログラム、デジタル信号処理回路のフィルタ係数を設定するためのプログラム
JP4734126B2 (ja) * 2005-03-23 2011-07-27 三洋電機株式会社 エコー防止回路、デジタル信号処理回路、エコー防止回路のフィルタ係数設定方法、デジタル信号処理回路のフィルタ係数設定方法、エコー防止回路のフィルタ係数を設定するためのプログラム、デジタル信号処理回路のフィルタ係数を設定するためのプログラム
JP4742226B2 (ja) * 2005-09-28 2011-08-10 国立大学法人九州大学 能動消音制御装置及び方法
US8345890B2 (en) 2006-01-05 2013-01-01 Audience, Inc. System and method for utilizing inter-microphone level differences for speech enhancement
US8194880B2 (en) * 2006-01-30 2012-06-05 Audience, Inc. System and method for utilizing omni-directional microphones for speech enhancement
US8204252B1 (en) 2006-10-10 2012-06-19 Audience, Inc. System and method for providing close microphone adaptive array processing
US9185487B2 (en) * 2006-01-30 2015-11-10 Audience, Inc. System and method for providing noise suppression utilizing null processing noise subtraction
US8744844B2 (en) * 2007-07-06 2014-06-03 Audience, Inc. System and method for adaptive intelligent noise suppression
JP4771532B2 (ja) * 2006-02-01 2011-09-14 オンセミコンダクター・トレーディング・リミテッド エコー防止回路及びデジタル信号処理回路
EP1860911A1 (en) * 2006-05-24 2007-11-28 Harman/Becker Automotive Systems GmbH System and method for improving communication in a room
US8204253B1 (en) 2008-06-30 2012-06-19 Audience, Inc. Self calibration of audio device
US8934641B2 (en) 2006-05-25 2015-01-13 Audience, Inc. Systems and methods for reconstructing decomposed audio signals
US8949120B1 (en) * 2006-05-25 2015-02-03 Audience, Inc. Adaptive noise cancelation
US8849231B1 (en) 2007-08-08 2014-09-30 Audience, Inc. System and method for adaptive power control
US8150065B2 (en) * 2006-05-25 2012-04-03 Audience, Inc. System and method for processing an audio signal
US8259926B1 (en) 2007-02-23 2012-09-04 Audience, Inc. System and method for 2-channel and 3-channel acoustic echo cancellation
US8204249B2 (en) 2007-04-30 2012-06-19 Hewlett-Packard Development Company, L.P. Methods and systems for reducing acoustic echoes in multichannel audio-communication systems
US10194032B2 (en) 2007-05-04 2019-01-29 Staton Techiya, Llc Method and apparatus for in-ear canal sound suppression
US9191740B2 (en) * 2007-05-04 2015-11-17 Personics Holdings, Llc Method and apparatus for in-ear canal sound suppression
US8526645B2 (en) 2007-05-04 2013-09-03 Personics Holdings Inc. Method and device for in ear canal echo suppression
US11683643B2 (en) 2007-05-04 2023-06-20 Staton Techiya Llc Method and device for in ear canal echo suppression
WO2008137870A1 (en) 2007-05-04 2008-11-13 Personics Holdings Inc. Method and device for acoustic management control of multiple microphones
US11856375B2 (en) 2007-05-04 2023-12-26 Staton Techiya Llc Method and device for in-ear echo suppression
JP2008306535A (ja) * 2007-06-08 2008-12-18 Sony Corp 音声信号処理装置、遅延時間の設定方法
US8005023B2 (en) * 2007-06-14 2011-08-23 Microsoft Corporation Client-side echo cancellation for multi-party audio conferencing
WO2008155708A1 (en) * 2007-06-21 2008-12-24 Koninklijke Philips Electronics N.V. A device for and a method of processing audio signals
US8189766B1 (en) 2007-07-26 2012-05-29 Audience, Inc. System and method for blind subband acoustic echo cancellation postfiltering
US7809129B2 (en) * 2007-08-31 2010-10-05 Motorola, Inc. Acoustic echo cancellation based on noise environment
US8428661B2 (en) * 2007-10-30 2013-04-23 Broadcom Corporation Speech intelligibility in telephones with multiple microphones
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
US8744069B2 (en) * 2007-12-10 2014-06-03 Microsoft Corporation Removing near-end frequencies from far-end sound
US8433061B2 (en) * 2007-12-10 2013-04-30 Microsoft Corporation Reducing echo
US8219387B2 (en) * 2007-12-10 2012-07-10 Microsoft Corporation Identifying far-end sound
US8180064B1 (en) 2007-12-21 2012-05-15 Audience, Inc. System and method for providing voice equalization
US8143620B1 (en) 2007-12-21 2012-03-27 Audience, Inc. System and method for adaptive classification of audio sources
JP4945429B2 (ja) * 2007-12-26 2012-06-06 株式会社東芝 エコー抑圧処理装置
US8194882B2 (en) 2008-02-29 2012-06-05 Audience, Inc. System and method for providing single microphone noise suppression fallback
US8355511B2 (en) 2008-03-18 2013-01-15 Audience, Inc. System and method for envelope-based acoustic echo cancellation
US8693698B2 (en) * 2008-04-30 2014-04-08 Qualcomm Incorporated Method and apparatus to reduce non-linear distortion in mobile computing devices
US8385557B2 (en) * 2008-06-19 2013-02-26 Microsoft Corporation Multichannel acoustic echo reduction
US8521530B1 (en) 2008-06-30 2013-08-27 Audience, Inc. System and method for enhancing a monaural audio signal
US8774423B1 (en) 2008-06-30 2014-07-08 Audience, Inc. System and method for controlling adaptivity of signal modification using a phantom coefficient
US7760869B2 (en) * 2008-08-28 2010-07-20 Embarq Holdings Company, Llc Method and apparatus for controlling the transmit volume level of a speakerphone
DE102008055760A1 (de) * 2008-11-04 2010-05-20 Siemens Medical Instruments Pte. Ltd. Adaptives Mikrofonsystem für ein Hörgerät und zugehöriges Verfahren zum Betrieb
US8538008B2 (en) * 2008-11-21 2013-09-17 Acoustic Technologies, Inc. Acoustic echo canceler using an accelerometer
TWI392241B (zh) * 2009-02-18 2013-04-01 Realtek Semiconductor Corp 迴音處理裝置與其相關方法
JP2010259008A (ja) * 2009-04-28 2010-11-11 Toshiba Corp 信号処理装置、音響装置及び信号処理方法
US8219394B2 (en) * 2010-01-20 2012-07-10 Microsoft Corporation Adaptive ambient sound suppression and speech tracking
US9008329B1 (en) 2010-01-26 2015-04-14 Audience, Inc. Noise reduction using multi-feature cluster tracker
US8718290B2 (en) 2010-01-26 2014-05-06 Audience, Inc. Adaptive noise reduction using level cues
WO2011129725A1 (en) * 2010-04-12 2011-10-20 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for noise cancellation in a speech encoder
US8473287B2 (en) 2010-04-19 2013-06-25 Audience, Inc. Method for jointly optimizing noise reduction and voice quality in a mono or multi-microphone system
US20120128168A1 (en) * 2010-11-18 2012-05-24 Texas Instruments Incorporated Method and apparatus for noise and echo cancellation for two microphone system subject to cross-talk
JP2011160429A (ja) * 2011-02-15 2011-08-18 Nippon Telegr & Teleph Corp <Ntt> エコー消去装置
US8804977B2 (en) 2011-03-18 2014-08-12 Dolby Laboratories Licensing Corporation Nonlinear reference signal processing for echo suppression
US9928824B2 (en) * 2011-05-11 2018-03-27 Silentium Ltd. Apparatus, system and method of controlling noise within a noise-controlled volume
GB2493801B (en) * 2011-08-18 2014-05-14 Ibm Improved audio quality in teleconferencing
JP5845787B2 (ja) * 2011-09-30 2016-01-20 ブラザー工業株式会社 音声処理装置、音声処理方法、および音声処理プログラム
CN102811310A (zh) * 2011-12-08 2012-12-05 苏州科达科技有限公司 一种网络视频摄像机上话音回声抵消的控制方法及系统
US8909990B2 (en) 2012-08-04 2014-12-09 Microsoft Corporation Historical software diagnostics using lightweight process snapshots
US9640194B1 (en) 2012-10-04 2017-05-02 Knowles Electronics, Llc Noise suppression for speech processing based on machine-learning mask estimation
US9083782B2 (en) 2013-05-08 2015-07-14 Blackberry Limited Dual beamform audio echo reduction
GB201309771D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo removal
GB201309777D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo suppression
GB201309779D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo removal
GB201309773D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo removal
US9536540B2 (en) 2013-07-19 2017-01-03 Knowles Electronics, Llc Speech signal separation and synthesis based on auditory scene analysis and speech modeling
US10289411B2 (en) 2013-11-18 2019-05-14 Microsoft Technology Licensing, Llc Diagnosing production applications
US9508359B2 (en) * 2014-06-19 2016-11-29 Yang Gao Acoustic echo preprocessing for speech enhancement
CN106797512B (zh) 2014-08-28 2019-10-25 美商楼氏电子有限公司 多源噪声抑制的方法、系统和非瞬时计算机可读存储介质
WO2016093855A1 (en) * 2014-12-12 2016-06-16 Nuance Communications, Inc. System and method for generating a self-steering beamformer
WO2016108166A1 (en) * 2014-12-28 2016-07-07 Silentium Ltd. Apparatus, system and method of controlling noise within a noise-controlled volume
US9712866B2 (en) 2015-04-16 2017-07-18 Comigo Ltd. Cancelling TV audio disturbance by set-top boxes in conferences
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
WO2016186997A1 (en) * 2015-05-15 2016-11-24 Harman International Industries, Inc. Acoustic echo cancelling system and method
US9653060B1 (en) * 2016-02-09 2017-05-16 Amazon Technologies, Inc. Hybrid reference signal for acoustic echo cancellation
US9659555B1 (en) * 2016-02-09 2017-05-23 Amazon Technologies, Inc. Multichannel acoustic echo cancellation
US10367948B2 (en) 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
US10154148B1 (en) * 2017-08-03 2018-12-11 Polycom, Inc. Audio echo cancellation with robust double-talk detection in a conferencing environment
CN108831496B (zh) * 2018-05-22 2019-12-10 出门问问信息科技有限公司 一种回声抑制方法及装置、存储介质、电子设备
US10951859B2 (en) 2018-05-30 2021-03-16 Microsoft Technology Licensing, Llc Videoconferencing device and method
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
BR112020024840A2 (pt) 2018-06-11 2021-03-02 Sony Corporation dispositivo e método de processamento de sinal, e, programa executado por um dispositivo de processamento de informações
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
US11417351B2 (en) * 2018-06-26 2022-08-16 Google Llc Multi-channel echo cancellation with scenario memory
WO2020061353A1 (en) 2018-09-20 2020-03-26 Shure Acquisition Holdings, Inc. Adjustable lobe shape for array microphones
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
EP3942842A1 (en) 2019-03-21 2022-01-26 Shure Acquisition Holdings, Inc. Housings and associated design features for ceiling array microphones
WO2020191380A1 (en) 2019-03-21 2020-09-24 Shure Acquisition Holdings,Inc. Auto focus, auto focus within regions, and auto placement of beamformed microphone lobes with inhibition functionality
CN114051738A (zh) 2019-05-23 2022-02-15 舒尔获得控股公司 可操纵扬声器阵列、系统及其方法
JP2022535229A (ja) 2019-05-31 2022-08-05 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 音声およびノイズアクティビティ検出と統合された低レイテンシオートミキサー
US11297426B2 (en) 2019-08-23 2022-04-05 Shure Acquisition Holdings, Inc. One-dimensional array microphone with improved directivity
US11552611B2 (en) 2020-02-07 2023-01-10 Shure Acquisition Holdings, Inc. System and method for automatic adjustment of reference gain
USD944776S1 (en) 2020-05-05 2022-03-01 Shure Acquisition Holdings, Inc. Audio device
WO2021243368A2 (en) 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Transducer steering and configuration systems and methods using a local positioning system
EP4285605A1 (en) 2021-01-28 2023-12-06 Shure Acquisition Holdings, Inc. Hybrid audio beamforming system

Family Cites Families (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2412210A1 (fr) * 1977-12-14 1979-07-13 Cit Alcatel Poste telephonique a haut-parleur
US4468641A (en) * 1982-06-28 1984-08-28 At&T Bell Laboratories Adaptive filter update normalization
US4584441A (en) * 1984-09-07 1986-04-22 At&T Bell Laboratories Bidirectional adaptive voice frequency repeater
US4712235A (en) * 1984-11-19 1987-12-08 International Business Machines Corporation Method and apparatus for improved control and time sharing of an echo canceller
US4677677A (en) * 1985-09-19 1987-06-30 Nelson Industries Inc. Active sound attenuation system with on-line adaptive feedback cancellation
US4636586A (en) * 1985-09-20 1987-01-13 Rca Corporation Speakerphone with adaptive cancellation of room echoes
CA1242541A (en) * 1985-11-25 1988-09-27 Dany Sylvain Echo cancellation in two-wire transmission path repeaters
FR2628918B1 (fr) * 1988-03-15 1990-08-10 France Etat Dispositif annuleur d'echo a filtrage en sous-bandes de frequence
JPH01245660A (ja) * 1988-03-25 1989-09-29 Matsushita Electric Ind Co Ltd ハウリング抑圧装置
US4912758A (en) * 1988-10-26 1990-03-27 International Business Machines Corporation Full-duplex digital speakerphone
AU614447B2 (en) * 1988-12-01 1991-08-29 Nec Corporation Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
JPH02211725A (ja) * 1989-02-10 1990-08-23 Matsushita Electric Ind Co Ltd 音響エコー抑圧装置
JPH0748681B2 (ja) * 1989-02-23 1995-05-24 日本電気株式会社 エコー消去器の係数制御方法
JP2842607B2 (ja) * 1989-03-13 1999-01-06 株式会社日立製作所 エコーキャンセラ、それを備えた通信装置および信号処理方法
FR2651077B1 (fr) * 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
US5305309A (en) * 1989-12-06 1994-04-19 Fujitsu Limited Echo canceller
JP2518433B2 (ja) * 1990-01-24 1996-07-24 日本電気株式会社 ダブルト―ク検出回路
JPH03262939A (ja) * 1990-03-14 1991-11-22 Fujitsu Ltd エコー経路変動検出方法およびその装置
JPH04108246A (ja) * 1990-08-29 1992-04-09 Oki Electric Ind Co Ltd ハンズフリー電話装置
US5263019A (en) * 1991-01-04 1993-11-16 Picturetel Corporation Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone
JP2836277B2 (ja) * 1991-03-14 1998-12-14 国際電信電話株式会社 エコーキャンセル装置
FR2675648B1 (fr) * 1991-04-19 1993-08-20 France Telecom Dispositif de traitement de l'echo residuel d'un annuleur du signal d'echo d'un signal numerique de parole.
US5274705A (en) * 1991-09-24 1993-12-28 Tellabs Inc. Nonlinear processor for an echo canceller and method
US5280525A (en) * 1991-09-27 1994-01-18 At&T Bell Laboratories Adaptive frequency dependent compensation for telecommunications channels
US5271057A (en) * 1991-10-09 1993-12-14 Bell Communications Research, Inc. Audio processing system for teleconferencing system
EP0543568A2 (en) * 1991-11-22 1993-05-26 AT&T Corp. High resolution filtering using low resolution processors
JP2853455B2 (ja) * 1992-05-15 1999-02-03 ケイディディ株式会社 エコーキャンセラ
JPH0614101A (ja) * 1992-06-26 1994-01-21 Oki Electric Ind Co Ltd ハンズフリー電話機
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
US5381473A (en) * 1992-10-29 1995-01-10 Andrea Electronics Corporation Noise cancellation apparatus
JPH084243B2 (ja) * 1993-05-31 1996-01-17 日本電気株式会社 多チャンネルエコー除去方法および装置
US5602765A (en) * 1993-07-27 1997-02-11 Nippon Telegraph And Telephone Corporation Adaptive transfer function estimating method and estimating device using the same
US5434912A (en) * 1993-08-11 1995-07-18 Bell Communications Research, Inc. Audio processing system for point-to-point and multipoint teleconferencing
US5323458A (en) * 1993-10-25 1994-06-21 Motorola Inc. Echo cancellation in a full-duplex speakerphone
US5475731A (en) * 1994-01-07 1995-12-12 Ericsson Inc. Echo-canceling system and method using echo estimate to modify error signal
SE502888C2 (sv) * 1994-06-14 1996-02-12 Volvo Ab Adaptiv mikrofonanordning och förfarande för adaptering till en inkommande målbrussignal
US5553014A (en) * 1994-10-31 1996-09-03 Lucent Technologies Inc. Adaptive finite impulse response filtering method and apparatus
US5602929A (en) * 1995-01-30 1997-02-11 Digisonix, Inc. Fast adapting control system and method
JP2758846B2 (ja) * 1995-02-27 1998-05-28 埼玉日本電気株式会社 ノイズキャンセラ装置
JP3403549B2 (ja) * 1995-05-29 2003-05-06 松下電器産業株式会社 エコーキャンセラ
US5631899A (en) * 1995-05-31 1997-05-20 Lucent Technologies Inc. Acoustic echo canceler
US5677951A (en) * 1995-06-19 1997-10-14 Lucent Technologies Inc. Adaptive filter and method for implementing echo cancellation

Also Published As

Publication number Publication date
DE69709363D1 (de) 2002-01-31
JP4046197B2 (ja) 2008-02-13
EE03842B1 (et) 2002-08-15
MY122083A (en) 2006-03-31
AU3734297A (en) 1998-02-10
EE9900024A (et) 1999-08-16
HK1019982A1 (en) 2000-03-03
WO1998004079A3 (en) 1998-03-19
DE69709363T2 (de) 2002-08-22
JP2000515345A (ja) 2000-11-14
CN1169312C (zh) 2004-09-29
KR20000065243A (ko) 2000-11-06
EP0914721A2 (en) 1999-05-12
PL185318B1 (pl) 2003-04-30
WO1998004079A2 (en) 1998-01-29
CN1226349A (zh) 1999-08-18
EP0914721B1 (en) 2001-12-19
KR100338657B1 (ko) 2002-09-19
PL331238A1 (en) 1999-07-05
AU719049B2 (en) 2000-05-04
US5796819A (en) 1998-08-18

Similar Documents

Publication Publication Date Title
BR9710475A (pt) Processo e circuito para cancelar um sinal de eco
DE69522928D1 (de) Schaltung zur Kopplung von Kommunikations-Bussen
DE69723994D1 (de) Elektronisches transaktionssystem
BR9500314A (pt) Aparelho para conversão de sinal de jogo
DE59707838D1 (de) Einrichtung zur Übertragung von Informationen von Fahrzeug zur Fahrzeug
BR9510167A (pt) Aperfeiçoamento em estopim para transmissão de sinal
IS4876A (is) Toghleri
DE69529679T2 (de) Signalsystem
BR9502598A (pt) Acionador de partida
BR9506845A (pt) Unidade de recepção de sinal e de processamento de sinal
BR9501183A (pt) Processo de transmissão de sinalizaçao para um pedido
BR9704861A (pt) Circuito supressor de ruído ativo de duto e processo para corrigir o sinal supressor de ruído no mesmo
KR970702396A (ko) 화이버볼 제조 방법(improvements relating to making fiberballs)
BR9507139A (pt) Unidade receptora de sinal e processadora de sinal
DE69512453D1 (de) Indexkarte
PT713016E (pt) Dispositivo de acoplamento
DE9420853U1 (de) Druckereierzeugnisse
KR960024552U (ko) 입출력신호전달펜
KR960014235U (ko) 점퍼 연결기
KR950031496U (ko) 프로브카드
DE9417335U1 (de) Koppelbaustein
BR7402501U (pt) Sistema de aplicaçao eletrônica em premiaçao instantânea
KR950031274U (ko) 부채가 부설된 주차 메모판
KR970056835U (ko) 만능도마
KR960003392U (ko) Tr보호 회로

Legal Events

Date Code Title Description
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 09/10/2007, OBSERVADAS AS CONDICOES LEGAIS.

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]