CA2063037A1 - Multi-channel echo canceling method and apparatus - Google Patents

Multi-channel echo canceling method and apparatus

Info

Publication number
CA2063037A1
CA2063037A1 CA2063037A CA2063037A CA2063037A1 CA 2063037 A1 CA2063037 A1 CA 2063037A1 CA 2063037 A CA2063037 A CA 2063037A CA 2063037 A CA2063037 A CA 2063037A CA 2063037 A1 CA2063037 A1 CA 2063037A1
Authority
CA
Canada
Prior art keywords
echoes
mixed
signal
replica
echo canceling
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
CA2063037A
Other languages
French (fr)
Other versions
CA2063037C (en
Inventor
Akihiro Hirano
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
Akihiro Hirano
Akihiko Sugiyama
Nec Corporation
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 Akihiro Hirano, Akihiko Sugiyama, Nec Corporation filed Critical Akihiro Hirano
Publication of CA2063037A1 publication Critical patent/CA2063037A1/en
Application granted granted Critical
Publication of CA2063037C publication Critical patent/CA2063037C/en
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

Abstract

Echo canceling method and apparatus for subtracting, from a mixed signal in which echoes produced from a plurality of reception signals are mixed with a transmission signal, a replica of the echoes in order to cancel the echoes in the mixed signal. The replica of the echoes is generated by the steps of selecting the reception signal which is leading in phase and producing a replica of the echoes from the selected reception signal by an adaptive filter. Generally, the replicas are produced by adaptive filters provided in one-to-one correspondence with the mixed signals.
CA002063037A 1991-03-14 1992-03-13 Multi-channel echo canceling method and apparatus Expired - Fee Related CA2063037C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP49445/1991 1991-03-14
JP3049445A JP2792252B2 (en) 1991-03-14 1991-03-14 Method and apparatus for removing multi-channel echo

Publications (2)

Publication Number Publication Date
CA2063037A1 true CA2063037A1 (en) 1992-09-15
CA2063037C CA2063037C (en) 1996-04-02

Family

ID=12831328

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002063037A Expired - Fee Related CA2063037C (en) 1991-03-14 1992-03-13 Multi-channel echo canceling method and apparatus

Country Status (5)

Country Link
US (1) US5396554A (en)
EP (1) EP0503660B1 (en)
JP (1) JP2792252B2 (en)
CA (1) CA2063037C (en)
DE (1) DE69226460T2 (en)

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JPH084243B2 (en) * 1993-05-31 1996-01-17 日本電気株式会社 Method and apparatus for removing multi-channel echo
US5689641A (en) * 1993-10-01 1997-11-18 Vicor, Inc. Multimedia collaboration system arrangement for routing compressed AV signal through a participant site without decompressing the AV signal
US5664019A (en) * 1995-02-08 1997-09-02 Interval Research Corporation Systems for feedback cancellation in an audio interface garment
DE19517469A1 (en) * 1995-05-12 1996-11-14 Sel Alcatel Ag Hands-free procedure for a multi-channel transmission system
DE69628618T2 (en) * 1995-09-26 2004-05-13 Nippon Telegraph And Telephone Corp. Method and device for multi-channel compensation of an acoustic echo
AU4996296A (en) * 1996-02-26 1997-09-10 Interval Research Corporation Systems for feedback cancellation in an audio interface garment
US5774562A (en) * 1996-03-25 1998-06-30 Nippon Telegraph And Telephone Corp. Method and apparatus for dereverberation
JPH09266456A (en) * 1996-03-28 1997-10-07 Mitsubishi Electric Corp Echo canceler
JP3152292B2 (en) * 1997-04-15 2001-04-03 日本電気株式会社 Method and apparatus for removing multi-channel echo
US6549627B1 (en) * 1998-01-30 2003-04-15 Telefonaktiebolaget Lm Ericsson Generating calibration signals for an adaptive beamformer
DE69942944D1 (en) * 1998-04-08 2010-12-30 British Telecomm TELE CONFERENCE SYSTEM
JP3319403B2 (en) * 1998-09-02 2002-09-03 日本電気株式会社 Method and apparatus for removing multi-channel echo
US6757385B1 (en) 1999-06-04 2004-06-29 Telefonaktiebolaget Lm Ericsson (Publ) Symmetry based subband acoustic echo cancellation
US6934387B1 (en) * 1999-12-17 2005-08-23 Marvell International Ltd. Method and apparatus for digital near-end echo/near-end crosstalk cancellation with adaptive correlation
US7310425B1 (en) * 1999-12-28 2007-12-18 Agere Systems Inc. Multi-channel frequency-domain adaptive filter method and apparatus
JP2002009675A (en) * 2000-06-26 2002-01-11 Nec Corp Method and device for canceling echo for multiplex channel
FR2828327B1 (en) * 2000-10-03 2003-12-12 France Telecom ECHO REDUCTION METHOD AND DEVICE
CA2522896A1 (en) * 2003-04-23 2004-11-04 Rh Lyon Corp Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation
US20060132595A1 (en) * 2004-10-15 2006-06-22 Kenoyer Michael L Speakerphone supporting video and audio features
US8116500B2 (en) * 2004-10-15 2012-02-14 Lifesize Communications, Inc. Microphone orientation and size in a speakerphone
US7903137B2 (en) * 2004-10-15 2011-03-08 Lifesize Communications, Inc. Videoconferencing echo cancellers
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
US7826624B2 (en) * 2004-10-15 2010-11-02 Lifesize Communications, Inc. Speakerphone self calibration and beam forming
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
US7970150B2 (en) * 2005-04-29 2011-06-28 Lifesize Communications, Inc. Tracking talkers using virtual broadside scan and directed beams
US7593539B2 (en) * 2005-04-29 2009-09-22 Lifesize Communications, Inc. Microphone and speaker arrangement in speakerphone
US7991167B2 (en) * 2005-04-29 2011-08-02 Lifesize Communications, Inc. Forming beams with nulls directed at noise sources
WO2010035658A1 (en) 2008-09-26 2010-04-01 日本電気株式会社 Signal processing method, signal processing device, and signal processing program
US9497330B2 (en) 2008-09-26 2016-11-15 Nec Corporation Signal processing method, signal processing device, and signal processing program
US9232072B2 (en) 2013-03-13 2016-01-05 Google Inc. Participant controlled spatial AEC
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
US9659555B1 (en) * 2016-02-09 2017-05-23 Amazon Technologies, Inc. Multichannel acoustic echo cancellation
US9653060B1 (en) * 2016-02-09 2017-05-16 Amazon Technologies, Inc. Hybrid reference signal for acoustic echo cancellation
US10367948B2 (en) 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
US10522167B1 (en) * 2018-02-13 2019-12-31 Amazon Techonlogies, Inc. Multichannel noise cancellation using deep neural network masking
EP3804356A1 (en) 2018-06-01 2021-04-14 Shure Acquisition Holdings, Inc. Pattern-forming microphone array
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
WO2020061353A1 (en) 2018-09-20 2020-03-26 Shure Acquisition Holdings, Inc. Adjustable lobe shape for array microphones
EP3942842A1 (en) 2019-03-21 2022-01-26 Shure Acquisition Holdings, Inc. Housings and associated design features for ceiling 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
CN113841421A (en) 2019-03-21 2021-12-24 舒尔获得控股公司 Auto-focus, in-region auto-focus, and auto-configuration of beamforming microphone lobes with suppression
WO2020237206A1 (en) 2019-05-23 2020-11-26 Shure Acquisition Holdings, Inc. Steerable speaker array, system, and method for the same
US11302347B2 (en) 2019-05-31 2022-04-12 Shure Acquisition Holdings, Inc. Low latency automixer integrated with voice and noise activity detection
EP4018680A1 (en) 2019-08-23 2022-06-29 Shure Acquisition Holdings, Inc. Two-dimensional microphone array with improved directivity
CN110634485B (en) * 2019-10-16 2023-06-13 声耕智能科技(西安)研究院有限公司 Voice interaction service processor and processing method
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
US11706562B2 (en) 2020-05-29 2023-07-18 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

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JPS6414150A (en) * 1987-07-07 1989-01-18 Fujikura Ltd Production of superconductor
JPH01190162A (en) * 1988-01-26 1989-07-31 Nec Corp Voice conference device for multi-channel
JPH01260967A (en) * 1988-04-11 1989-10-18 Nec Corp Voice conference equipment for multi-channel signal
JPH01319360A (en) * 1988-06-20 1989-12-25 Nec Corp Voice conference equipment
JPH0322631A (en) * 1989-06-19 1991-01-31 Mitsubishi Electric Corp Echo canceller

Also Published As

Publication number Publication date
JP2792252B2 (en) 1998-09-03
EP0503660A3 (en) 1993-09-22
EP0503660B1 (en) 1998-08-05
EP0503660A2 (en) 1992-09-16
CA2063037C (en) 1996-04-02
DE69226460T2 (en) 1999-04-29
DE69226460D1 (en) 1998-09-10
US5396554A (en) 1995-03-07
JPH04284732A (en) 1992-10-09

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