CA2088558A1 - Eliminateur d'echo multicanal muni de filtres adaptatifs a vecteurs de coefficients selectionnables - Google Patents

Eliminateur d'echo multicanal muni de filtres adaptatifs a vecteurs de coefficients selectionnables

Info

Publication number
CA2088558A1
CA2088558A1 CA2088558A CA2088558A CA2088558A1 CA 2088558 A1 CA2088558 A1 CA 2088558A1 CA 2088558 A CA2088558 A CA 2088558A CA 2088558 A CA2088558 A CA 2088558A CA 2088558 A1 CA2088558 A1 CA 2088558A1
Authority
CA
Canada
Prior art keywords
signal
adaptive filters
echo
cancelling
coefficient vectors
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
CA2088558A
Other languages
English (en)
Other versions
CA2088558C (fr
Inventor
Akihiro Hirano
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
NEC Corp
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 NEC Corp filed Critical NEC Corp
Publication of CA2088558A1 publication Critical patent/CA2088558A1/fr
Application granted granted Critical
Publication of CA2088558C publication Critical patent/CA2088558C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
CA002088558A 1992-01-31 1993-02-01 Eliminateur d'echo multicanal muni de filtres adaptatifs a vecteurs de coefficients selectionnables Expired - Fee Related CA2088558C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4-46185 1992-01-31
JP4046185A JP2792311B2 (ja) 1992-01-31 1992-01-31 多チャンネルエコー除去方法および装置

Publications (2)

Publication Number Publication Date
CA2088558A1 true CA2088558A1 (fr) 1993-08-01
CA2088558C CA2088558C (fr) 1997-12-23

Family

ID=12739988

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002088558A Expired - Fee Related CA2088558C (fr) 1992-01-31 1993-02-01 Eliminateur d'echo multicanal muni de filtres adaptatifs a vecteurs de coefficients selectionnables

Country Status (5)

Country Link
US (1) US5371789A (fr)
EP (1) EP0561133B1 (fr)
JP (1) JP2792311B2 (fr)
CA (1) CA2088558C (fr)
DE (1) DE69321635T2 (fr)

Families Citing this family (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2576767B2 (ja) * 1993-09-10 1997-01-29 日本電気株式会社 エコー消去方法およびエコーキャンセラ
US6594688B2 (en) 1993-10-01 2003-07-15 Collaboration Properties, Inc. Dedicated echo canceler for a workstation
US5473686A (en) * 1994-02-01 1995-12-05 Tandy Corporation Echo cancellation apparatus
US5500892A (en) * 1994-02-14 1996-03-19 Brooktree Corporation Echo canceller
DE4420212A1 (de) * 1994-06-04 1995-12-07 Deutsche Bundespost Telekom Übertragungssystem für gleichzeitige Mehrfachübertragung von mehreren Bild- und Tonsignalen
JP2749780B2 (ja) * 1994-09-30 1998-05-13 株式会社エイ・ティ・アール人間情報通信研究所 適応化型相互相関装置
JP3397269B2 (ja) * 1994-10-26 2003-04-14 日本電信電話株式会社 多チャネル反響消去方法
US5828756A (en) * 1994-11-22 1998-10-27 Lucent Technologies Inc. Stereophonic acoustic echo cancellation using non-linear transformations
US5548642A (en) * 1994-12-23 1996-08-20 At&T Corp. Optimization of adaptive filter tap settings for subband acoustic echo cancelers in teleconferencing
US5495473A (en) * 1994-12-28 1996-02-27 Intel Corporation Method and apparatus for implementing hardware independent echo cancellation in a full-duplex audio stream in a computer system
JPH08204619A (ja) * 1995-01-26 1996-08-09 Nec Corp エコーサプレッサ
US5664019A (en) * 1995-02-08 1997-09-02 Interval Research Corporation Systems for feedback cancellation in an audio interface garment
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
US5677951A (en) * 1995-06-19 1997-10-14 Lucent Technologies Inc. Adaptive filter and method for implementing echo cancellation
JP2856113B2 (ja) * 1995-07-10 1999-02-10 日本電気株式会社 エコーキャンセラ
US5663955A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller system with shared coefficient memory
US5664011A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller with adaptive and non-adaptive filters
US6002776A (en) * 1995-09-18 1999-12-14 Interval Research Corporation Directional acoustic signal processor and method therefor
DE69628618T2 (de) * 1995-09-26 2004-05-13 Nippon Telegraph And Telephone Corp. Verfahren und Einrichtung zur mehrkanaligen Kompensation eines akustischen Echos
JP2000505260A (ja) * 1996-02-26 2000-04-25 インターバル リサーチ コーポレイション 音声インターフェースガーメントにおけるフィードバック打消しシステム
JP2924762B2 (ja) * 1996-02-28 1999-07-26 日本電気株式会社 アダプティブフィルタ及びその適応化方法
JPH09266456A (ja) * 1996-03-28 1997-10-07 Mitsubishi Electric Corp エコーキャンセラ
FI106326B (fi) * 1996-09-23 2001-01-15 Tellabs Oy Kytkentä kaiunpoistavan moninopeusmodeemin sovittamiseksi linjalle sekä kytkentämenetelmä
DE19647276A1 (de) * 1996-11-15 1998-05-20 Alsthom Cge Alcatel Verfahren und Anordnung zur adaptiven Echokompensation
US5953411A (en) * 1996-12-18 1999-09-14 Intel Corporation Method and apparatus for maintaining audio sample correlation
US6174806B1 (en) 1997-01-28 2001-01-16 Micron Technology, Inc. High pressure anneals of integrated circuit structures
US5933797A (en) * 1997-02-28 1999-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Adaptive dual filter echo cancellation
US5999828A (en) * 1997-03-19 1999-12-07 Qualcomm Incorporated Multi-user wireless telephone having dual echo cancellers
US6430295B1 (en) 1997-07-11 2002-08-06 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for measuring signal level and delay at multiple sensors
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
US6505057B1 (en) * 1998-01-23 2003-01-07 Digisonix Llc Integrated vehicle voice enhancement system and hands-free cellular telephone system
EP0944228B1 (fr) * 1998-03-05 2003-06-04 Nippon Telegraph and Telephone Corporation Procédé et dispositif d'annulation d'écho acoustique à canaux multiples
DE69903012T2 (de) 1998-04-08 2003-04-30 British Telecommunications P.L.C., London Echokompensation
JP3319403B2 (ja) * 1998-09-02 2002-09-03 日本電気株式会社 多チャネルエコー除去方法及び装置
JP2000196507A (ja) * 1998-12-28 2000-07-14 Nec Corp 多重化回線用エコ―除去の方法及び装置
ES2269137T3 (es) 1999-05-25 2007-04-01 British Telecommunications Public Limited Company Cancelacion del eco acustico.
US6587974B1 (en) * 1999-11-19 2003-07-01 Tyco Telecommunications (Us) Inc. Method for fault detection and fast protection switching in transmission systems
US6384873B1 (en) * 1999-12-03 2002-05-07 Thomson Licensing S.A. Vector magnitude control of a comb filter
JP2002009675A (ja) * 2000-06-26 2002-01-11 Nec Corp 多重化回線用エコー除去方法及び装置
US20020054685A1 (en) * 2000-11-09 2002-05-09 Carlos Avendano System for suppressing acoustic echoes and interferences in multi-channel audio systems
WO2002052543A1 (fr) * 2000-12-26 2002-07-04 Lear Automotive (Eeds) Spain, S.L. Systeme et procede de communication pour l'habitacle d'un vehicule automobile
US6934655B2 (en) * 2001-03-16 2005-08-23 Mindspeed Technologies, Inc. Method and apparatus for transmission line analysis
US20020191779A1 (en) * 2001-03-23 2002-12-19 Tien Pham System for convolutional echo cancellation by iterative autocorrelation
FR2841721B1 (fr) * 2002-06-28 2004-08-20 France Telecom Dispositif de traitement d'echo pour systeme de communication de type monovoie ou multivoies
US7251213B2 (en) * 2002-09-17 2007-07-31 At&T Corp. Method for remote measurement of echo path delay
US20040064622A1 (en) * 2002-09-30 2004-04-01 Smith Winthrop W. Signal processing resource with sample-by-sample selective characteristics
KR100480789B1 (ko) * 2003-01-17 2005-04-06 삼성전자주식회사 피드백 구조를 이용한 적응적 빔 형성방법 및 장치
US7218730B2 (en) * 2003-08-13 2007-05-15 International Business Machines Corporation System and method for analysis and filtering of signals in a telecommunications network
JP4192800B2 (ja) * 2004-02-13 2008-12-10 ソニー株式会社 音声集音装置と方法
US20050285935A1 (en) * 2004-06-29 2005-12-29 Octiv, Inc. Personal conferencing node
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
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
US8050398B1 (en) 2007-10-31 2011-11-01 Clearone Communications, Inc. Adaptive conferencing pod sidetone compensator connecting to a telephonic device having intermittent sidetone
US8462193B1 (en) * 2010-01-08 2013-06-11 Polycom, Inc. Method and system for processing audio signals
GB2493801B (en) 2011-08-18 2014-05-14 Ibm Improved audio quality in teleconferencing
US9613634B2 (en) * 2014-06-19 2017-04-04 Yang Gao Control of acoustic echo canceller adaptive filter for speech enhancement
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
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
US10594869B2 (en) * 2017-08-03 2020-03-17 Bose Corporation Mitigating impact of double talk for residual echo suppressors
US10200540B1 (en) * 2017-08-03 2019-02-05 Bose Corporation Efficient reutilization of acoustic echo canceler channels
US10542153B2 (en) 2017-08-03 2020-01-21 Bose Corporation Multi-channel residual echo suppression
US10863269B2 (en) 2017-10-03 2020-12-08 Bose Corporation Spatial double-talk detector
US10090000B1 (en) * 2017-11-01 2018-10-02 GM Global Technology Operations LLC Efficient echo cancellation using transfer function estimation
US10522167B1 (en) * 2018-02-13 2019-12-31 Amazon Techonlogies, Inc. Multichannel noise cancellation using deep neural network masking
EP3804356A1 (fr) 2018-06-01 2021-04-14 Shure Acquisition Holdings, Inc. Réseau de microphones à formation de motifs
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
EP3854108B1 (fr) 2018-09-20 2025-10-22 Shure Acquisition Holdings, Inc. Forme de lobe réglable pour microphones en réseau
JP7572964B2 (ja) 2019-03-21 2024-10-24 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
EP3942842B1 (fr) 2019-03-21 2026-03-11 Shure Acquisition Holdings, Inc. Boîtiers et caractéristiques de conception associées pour microphones matriciels de plafond
US10964305B2 (en) 2019-05-20 2021-03-30 Bose Corporation Mitigating impact of double talk for residual echo suppressors
CN114051738B (zh) 2019-05-23 2024-10-01 舒尔获得控股公司 可操纵扬声器阵列、系统及其方法
US11302347B2 (en) 2019-05-31 2022-04-12 Shure Acquisition Holdings, Inc. Low latency automixer integrated with voice and noise activity detection
EP4018680B1 (fr) 2019-08-23 2026-04-29 Shure Acquisition Holdings, Inc. Réseau de microphones bidimensionnels à directivité améliorée
US11107488B1 (en) * 2019-10-24 2021-08-31 Amazon Technologies, Inc. Reduced reference canceller
US12028678B2 (en) 2019-11-01 2024-07-02 Shure Acquisition Holdings, Inc. Proximity microphone
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 (fr) 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Systèmes et procédés d'orientation et de configuration de transducteurs utilisant un système de positionnement local
US11785380B2 (en) 2021-01-28 2023-10-10 Shure Acquisition Holdings, Inc. Hybrid audio beamforming system
US12452584B2 (en) 2021-01-29 2025-10-21 Shure Acquisition Holdings, Inc. Scalable conferencing systems and methods
US12542123B2 (en) 2021-08-31 2026-02-03 Shure Acquisition Holdings, Inc. Mask non-linear processor for acoustic echo cancellation
CN118216161A (zh) 2021-10-04 2024-06-18 舒尔获得控股公司 联网自动混合器系统及方法
EP4427465A1 (fr) 2021-11-05 2024-09-11 Shure Acquisition Holdings, Inc. Algorithme distribué pour auto-mélange de la parole sur des réseaux sans fil
WO2023133513A1 (fr) 2022-01-07 2023-07-13 Shure Acquisition Holdings, Inc. Formation de faisceaux audio avec système et procédés de commande d'annulation
US12598261B2 (en) 2022-09-28 2026-04-07 Shure Acquisition Holdings, Inc. Wideband doubletalk detection for optimization of acoustic echo cancellation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621172A (en) * 1982-12-22 1986-11-04 Nec Corporation Fast convergence method and system for echo canceller
FR2538975A1 (fr) * 1982-12-30 1984-07-06 Trt Telecom Radio Electr Procede utilise dans un dispositif d'annulation d'echo pour la mesure d'un retard d'echo et dispositif de mise en oeuvre de ce procede
US4609787A (en) * 1984-05-21 1986-09-02 Communications Satellite Corporation Echo canceller with extended frequency range
JPS62120733A (ja) * 1985-11-21 1987-06-02 Nippon Telegr & Teleph Corp <Ntt> 反響消去装置
JPS62125722A (ja) * 1985-11-26 1987-06-08 Matsushita Electric Ind Co Ltd 音響的エコ−消去装置
JPH0650829B2 (ja) * 1986-09-16 1994-06-29 日本電気株式会社 エコ−キヤンセラ方式モデム
ATE77719T1 (de) * 1986-11-17 1992-07-15 Alcatel Nv Einstellbarer echokompensator.
JP2810052B2 (ja) * 1987-11-18 1998-10-15 株式会社日立製作所 伝送装置
FR2628918B1 (fr) * 1988-03-15 1990-08-10 France Etat Dispositif annuleur d'echo a filtrage en sous-bandes de frequence
US4947425A (en) * 1989-10-27 1990-08-07 At&T Bell Laboratories Echo measurement arrangement

Also Published As

Publication number Publication date
CA2088558C (fr) 1997-12-23
DE69321635D1 (de) 1998-11-26
EP0561133A1 (fr) 1993-09-22
DE69321635T2 (de) 1999-03-25
JPH05218906A (ja) 1993-08-27
EP0561133B1 (fr) 1998-10-21
JP2792311B2 (ja) 1998-09-03
US5371789A (en) 1994-12-06

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