CA2413217A1 - Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity - Google Patents

Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity Download PDF

Info

Publication number
CA2413217A1
CA2413217A1 CA 2413217 CA2413217A CA2413217A1 CA 2413217 A1 CA2413217 A1 CA 2413217A1 CA 2413217 CA2413217 CA 2413217 CA 2413217 A CA2413217 A CA 2413217A CA 2413217 A1 CA2413217 A1 CA 2413217A1
Authority
CA
Canada
Prior art keywords
acoustic echo
look
echo cancellation
full
audio conferencing
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
CA 2413217
Other languages
French (fr)
Other versions
CA2413217C (en
Inventor
Franck Beaucoup
Michael Tetelbaum
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.)
Mitel Networks Corp
Original Assignee
Mitel Knowledge 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 Mitel Knowledge Corp filed Critical Mitel Knowledge Corp
Priority to CA002413217A priority Critical patent/CA2413217C/en
Publication of CA2413217A1 publication Critical patent/CA2413217A1/en
Application granted granted Critical
Publication of CA2413217C publication Critical patent/CA2413217C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • 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)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

A method is set forth of controlling an acoustic echo canceller at the outpu t of a beamformer in an audio conferencing device. Information is saved to, and retrieved from, memory that characterizes each of a finite number of look directions, or regions of focus, covering the entire spatial span of the conferencing device. Each time a change occurs from a first look direction to a second look direction, information relating to the workspace captured by the acoustic echo canceller is saved f or the first look direction, and previously saved information for the second look directi on is retrieved from memory. The acoustic echo cancellation then takes place for t he second look direction with the retrieved information.
CA002413217A 2002-11-29 2002-11-29 Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity Expired - Lifetime CA2413217C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002413217A CA2413217C (en) 2002-11-29 2002-11-29 Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002413217A CA2413217C (en) 2002-11-29 2002-11-29 Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity

Publications (2)

Publication Number Publication Date
CA2413217A1 true CA2413217A1 (en) 2004-05-29
CA2413217C CA2413217C (en) 2007-01-16

Family

ID=32476979

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002413217A Expired - Lifetime CA2413217C (en) 2002-11-29 2002-11-29 Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity

Country Status (1)

Country Link
CA (1) CA2413217C (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1722545A1 (en) * 2005-05-09 2006-11-15 Mitel Networks Corporation A method to reduce training time of an acoustic echo canceller in a full-duplex beamforming-based audio conferencing system
US7630502B2 (en) 2003-09-16 2009-12-08 Mitel Networks Corporation Method for optimal microphone array design under uniform acoustic coupling constraints
WO2011090386A1 (en) * 2010-01-19 2011-07-28 Squarehead Technology As Location dependent feedback cancellation
GB2495472A (en) * 2011-09-30 2013-04-17 Skype Device including an acoustic beamformer and means processing received audio signals for echo suppression
WO2013078474A1 (en) * 2011-11-25 2013-05-30 Microsoft Corporation Processing signals
US8824693B2 (en) 2011-09-30 2014-09-02 Skype Processing audio signals
US8891785B2 (en) 2011-09-30 2014-11-18 Skype Processing signals
US8981994B2 (en) 2011-09-30 2015-03-17 Skype Processing signals
US9031257B2 (en) 2011-09-30 2015-05-12 Skype Processing signals
US9042575B2 (en) 2011-12-08 2015-05-26 Skype Processing audio signals
US9042573B2 (en) 2011-09-30 2015-05-26 Skype Processing signals
US9210504B2 (en) 2011-11-18 2015-12-08 Skype Processing audio signals
US9269367B2 (en) 2011-07-05 2016-02-23 Skype Limited Processing audio signals during a communication event
US10938994B2 (en) 2018-06-25 2021-03-02 Cypress Semiconductor Corporation Beamformer and acoustic echo canceller (AEC) system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7630502B2 (en) 2003-09-16 2009-12-08 Mitel Networks Corporation Method for optimal microphone array design under uniform acoustic coupling constraints
EP1722545A1 (en) * 2005-05-09 2006-11-15 Mitel Networks Corporation A method to reduce training time of an acoustic echo canceller in a full-duplex beamforming-based audio conferencing system
US7831036B2 (en) 2005-05-09 2010-11-09 Mitel Networks Corporation Method to reduce training time of an acoustic echo canceller in a full-duplex beamforming-based audio conferencing system
WO2011090386A1 (en) * 2010-01-19 2011-07-28 Squarehead Technology As Location dependent feedback cancellation
US9269367B2 (en) 2011-07-05 2016-02-23 Skype Limited Processing audio signals during a communication event
US8981994B2 (en) 2011-09-30 2015-03-17 Skype Processing signals
US8824693B2 (en) 2011-09-30 2014-09-02 Skype Processing audio signals
US8891785B2 (en) 2011-09-30 2014-11-18 Skype Processing signals
US9031257B2 (en) 2011-09-30 2015-05-12 Skype Processing signals
US9042574B2 (en) 2011-09-30 2015-05-26 Skype Processing audio signals
US9042573B2 (en) 2011-09-30 2015-05-26 Skype Processing signals
GB2495472A (en) * 2011-09-30 2013-04-17 Skype Device including an acoustic beamformer and means processing received audio signals for echo suppression
GB2495472B (en) * 2011-09-30 2019-07-03 Skype Processing audio signals
US9210504B2 (en) 2011-11-18 2015-12-08 Skype Processing audio signals
WO2013078474A1 (en) * 2011-11-25 2013-05-30 Microsoft Corporation Processing signals
US9111543B2 (en) 2011-11-25 2015-08-18 Skype Processing signals
US9042575B2 (en) 2011-12-08 2015-05-26 Skype Processing audio signals
US10938994B2 (en) 2018-06-25 2021-03-02 Cypress Semiconductor Corporation Beamformer and acoustic echo canceller (AEC) system

Also Published As

Publication number Publication date
CA2413217C (en) 2007-01-16

Similar Documents

Publication Publication Date Title
US6990193B2 (en) Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity
CA2413217A1 (en) Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity
US10269369B2 (en) System and method of noise reduction for a mobile device
CA2394429A1 (en) Robust talker localization in reverberant environment
US10728662B2 (en) Audio mixing for distributed audio sensors
EP1501332A3 (en) A method to reduce acoustic coupling in audio conferencing systems
CA2539798A1 (en) A method to reduce training time of an acoustic echo canceller in a full-duplex beamforming-based audio conferencing system
WO2007127762A3 (en) Method and system for sound beam- forming using internal device speakers in conjunction with external speakers
ATE464738T1 (en) ECHO CANCELLATION
DE69705803T2 (en) Stereo acoustic echo cancellation through nonlinear transformations
EP1377041A3 (en) Integrated design for omni-directional camera and microphone array
TW200718155A (en) Improved echo cacellation in telephones with multiple microphones
WO2005002183A3 (en) Statistical adaptive-filter controller
Papp et al. Hands-free voice communication with TV
Hoshuyama et al. Robust adaptive beamforming
AU2003298705A1 (en) Voice-based placement system and method with access by call line
CA2430030A1 (en) Distributed echo cancelling
WO2004034732A3 (en) Acoustic reproduction device with improved directional characteristics
EP1638079A3 (en) Method and system for active noise cancellation
AU2003258096A1 (en) Full duplex telephone set using echo cancellation and side tone management for high gain stability
US8737648B2 (en) Spatialized audio over headphones
JPH09233198A (en) Method and device for software basis bridge for full duplex voice conference telephone system
JPH11164389A (en) Adaptive noise canceler device
AU2003295834A1 (en) Methods and systems for conference call buffering
JPH098707A (en) Speech operated controller

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20221129

MKEX Expiry

Effective date: 20221129