WO2001093554A3 - Method and device for acoustic echo cancellation combined with adaptive beamforming - Google Patents

Method and device for acoustic echo cancellation combined with adaptive beamforming Download PDF

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Publication number
WO2001093554A3
WO2001093554A3 PCT/EP2001/005091 EP0105091W WO0193554A3 WO 2001093554 A3 WO2001093554 A3 WO 2001093554A3 EP 0105091 W EP0105091 W EP 0105091W WO 0193554 A3 WO0193554 A3 WO 0193554A3
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WO
WIPO (PCT)
Prior art keywords
adaptive
data
echo cancelling
adaptive beamforming
beamformer
Prior art date
Application number
PCT/EP2001/005091
Other languages
French (fr)
Other versions
WO2001093554A2 (en
Inventor
Harm J W Belt
Cornelis P Janse
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to EP01929622A priority Critical patent/EP1287672B1/en
Priority to DE60129955T priority patent/DE60129955D1/en
Priority to JP2001588218A priority patent/JP2003535510A/en
Publication of WO2001093554A2 publication Critical patent/WO2001093554A2/en
Publication of WO2001093554A3 publication Critical patent/WO2001093554A3/en

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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

A method is described, wherein multiple input signals are subjected to a combination process of adaptive beamforming and adaptive echo cancelling, and wherein for each of the input signals an individual processing history of adaptive echo cancelling data is kept and combined with current adaptive beamforming data. Accordingly an audio processing device is described which comprises at least one parallel acoustic paths for providing respective inputs signals, the acoustic paths are connected in series to beamformer paths, and the device comprises an adaptive beamformer and an adaptive echo canceller for performing adaptive beamforming and adaptive echo cancelling respectively, whereby the adaptive echo canceller is provided with storage means for storing in relation to every input signal, individual processing histories of adaptive echo cancelling data for combination with current adaptive beamforming data. Both beamformer and echo cancelling techniques can be combined such that a reduced number of calculations results.
PCT/EP2001/005091 2000-05-26 2001-05-04 Method and device for acoustic echo cancellation combined with adaptive beamforming WO2001093554A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01929622A EP1287672B1 (en) 2000-05-26 2001-05-04 Method and device for acoustic echo cancellation combined with adaptive beamforming
DE60129955T DE60129955D1 (en) 2000-05-26 2001-05-04 METHOD AND DEVICE FOR ACOUSTIC ECHOUNTER PRESSURE WITH ADAPTIVE RADIATION
JP2001588218A JP2003535510A (en) 2000-05-26 2001-05-04 Method and apparatus for voice echo cancellation combined with adaptive beamforming

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00201881.0 2000-05-26
EP00201881 2000-05-26

Publications (2)

Publication Number Publication Date
WO2001093554A2 WO2001093554A2 (en) 2001-12-06
WO2001093554A3 true WO2001093554A3 (en) 2002-10-03

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Application Number Title Priority Date Filing Date
PCT/EP2001/005091 WO2001093554A2 (en) 2000-05-26 2001-05-04 Method and device for acoustic echo cancellation combined with adaptive beamforming

Country Status (7)

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US (1) US7035415B2 (en)
EP (1) EP1287672B1 (en)
JP (1) JP2003535510A (en)
CN (1) CN100477704C (en)
AT (1) ATE370608T1 (en)
DE (1) DE60129955D1 (en)
WO (1) WO2001093554A2 (en)

Families Citing this family (124)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6961395B2 (en) * 2001-11-16 2005-11-01 Nortel Networks Limited Time variant filter implementation
GB2388001A (en) * 2002-04-26 2003-10-29 Mitel Knowledge Corp Compensating for beamformer steering delay during handsfree speech recognition
US7398209B2 (en) * 2002-06-03 2008-07-08 Voicebox Technologies, Inc. Systems and methods for responding to natural language speech utterance
US7693720B2 (en) * 2002-07-15 2010-04-06 Voicebox Technologies, Inc. Mobile systems and methods for responding to natural language speech utterance
US7809145B2 (en) * 2006-05-04 2010-10-05 Sony Computer Entertainment Inc. Ultra small microphone array
US7783061B2 (en) * 2003-08-27 2010-08-24 Sony Computer Entertainment Inc. Methods and apparatus for the targeted sound detection
US8947347B2 (en) * 2003-08-27 2015-02-03 Sony Computer Entertainment Inc. Controlling actions in a video game unit
US8073157B2 (en) * 2003-08-27 2011-12-06 Sony Computer Entertainment Inc. Methods and apparatus for targeted sound detection and characterization
US8139793B2 (en) * 2003-08-27 2012-03-20 Sony Computer Entertainment Inc. Methods and apparatus for capturing audio signals based on a visual image
US7803050B2 (en) 2002-07-27 2010-09-28 Sony Computer Entertainment Inc. Tracking device with sound emitter for use in obtaining information for controlling game program execution
US8233642B2 (en) 2003-08-27 2012-07-31 Sony Computer Entertainment Inc. Methods and apparatuses for capturing an audio signal based on a location of the signal
US9174119B2 (en) 2002-07-27 2015-11-03 Sony Computer Entertainement America, LLC Controller for providing inputs to control execution of a program when inputs are combined
US8160269B2 (en) 2003-08-27 2012-04-17 Sony Computer Entertainment Inc. Methods and apparatuses for adjusting a listening area for capturing sounds
US6868042B1 (en) * 2002-08-08 2005-03-15 The United States Of America As Represented By The Secretary Of The Navy Data-based signal definition for frequency domain adaptive beamforming algorithms
US6990193B2 (en) * 2002-11-29 2006-01-24 Mitel Knowledge Corporation Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity
JP3727927B2 (en) * 2003-02-10 2005-12-21 株式会社東芝 Speaker verification device
EP1453348A1 (en) * 2003-02-25 2004-09-01 AKG Acoustics GmbH Self-calibration of microphone arrays
US20070223732A1 (en) * 2003-08-27 2007-09-27 Mao Xiao D Methods and apparatuses for adjusting a visual image based on an audio signal
JP2005084253A (en) * 2003-09-05 2005-03-31 Matsushita Electric Ind Co Ltd Sound processing apparatus, method, program and storage medium
DE602004013465T2 (en) * 2004-01-07 2008-10-16 Koninklijke Philips Electronics N.V. AUDIO SYSTEM WITH PREPARATIONS FOR FILTER COEFFICIENT COPYING
EP1633121B1 (en) * 2004-09-03 2008-11-05 Harman Becker Automotive Systems GmbH Speech signal processing with combined adaptive noise reduction and adaptive echo compensation
EP1722545B1 (en) * 2005-05-09 2008-08-13 Mitel Networks Corporation A method and a system to reduce training time of an acoustic echo canceller in a full-duplex beamforming-based audio conferencing system
US7640160B2 (en) 2005-08-05 2009-12-29 Voicebox Technologies, Inc. Systems and methods for responding to natural language speech utterance
US7620549B2 (en) * 2005-08-10 2009-11-17 Voicebox Technologies, Inc. System and method of supporting adaptive misrecognition in conversational speech
US7949529B2 (en) * 2005-08-29 2011-05-24 Voicebox Technologies, Inc. Mobile systems and methods of supporting natural language human-machine interactions
EP1934971A4 (en) 2005-08-31 2010-10-27 Voicebox Technologies Inc Dynamic speech sharpening
US20080273716A1 (en) * 2005-09-27 2008-11-06 Kosuke Saito Feedback Sound Eliminating Apparatus
US7970123B2 (en) * 2005-10-20 2011-06-28 Mitel Networks Corporation Adaptive coupling equalization in beamforming-based communication systems
EP2072852B1 (en) 2006-05-08 2016-01-06 Shinko Electric Co., Ltd Damping apparatus for reducing vibration of automobile body
US20120243714A9 (en) * 2006-05-30 2012-09-27 Sonitus Medical, Inc. Microphone placement for oral applications
US7796769B2 (en) * 2006-05-30 2010-09-14 Sonitus Medical, Inc. Methods and apparatus for processing audio signals
US8291912B2 (en) * 2006-08-22 2012-10-23 Sonitus Medical, Inc. Systems for manufacturing oral-based hearing aid appliances
CA2663017C (en) * 2006-09-08 2014-03-25 Sonitus Medical, Inc. Methods and apparatus for treating tinnitus
US8073681B2 (en) 2006-10-16 2011-12-06 Voicebox Technologies, Inc. System and method for a cooperative conversational voice user interface
US7818176B2 (en) 2007-02-06 2010-10-19 Voicebox Technologies, Inc. System and method for selecting and presenting advertisements based on natural language processing of voice-based input
US8005238B2 (en) * 2007-03-22 2011-08-23 Microsoft Corporation Robust adaptive beamforming with enhanced noise suppression
US8005237B2 (en) * 2007-05-17 2011-08-23 Microsoft Corp. Sensor array beamformer post-processor
US8270638B2 (en) * 2007-05-29 2012-09-18 Sonitus Medical, Inc. Systems and methods to provide communication, positioning and monitoring of user status
JP5338040B2 (en) * 2007-06-04 2013-11-13 ヤマハ株式会社 Audio conferencing equipment
US20080304677A1 (en) * 2007-06-08 2008-12-11 Sonitus Medical Inc. System and method for noise cancellation with motion tracking capability
US20090028352A1 (en) * 2007-07-24 2009-01-29 Petroff Michael L Signal process for the derivation of improved dtm dynamic tinnitus mitigation sound
US20120235632A9 (en) * 2007-08-20 2012-09-20 Sonitus Medical, Inc. Intra-oral charging systems and methods
US8433080B2 (en) * 2007-08-22 2013-04-30 Sonitus Medical, Inc. Bone conduction hearing device with open-ear microphone
US8224013B2 (en) 2007-08-27 2012-07-17 Sonitus Medical, Inc. Headset systems and methods
US7682303B2 (en) 2007-10-02 2010-03-23 Sonitus Medical, Inc. Methods and apparatus for transmitting vibrations
US20090105523A1 (en) * 2007-10-18 2009-04-23 Sonitus Medical, Inc. Systems and methods for compliance monitoring
US8795172B2 (en) * 2007-12-07 2014-08-05 Sonitus Medical, Inc. Systems and methods to provide two-way communications
US8140335B2 (en) 2007-12-11 2012-03-20 Voicebox Technologies, Inc. System and method for providing a natural language voice user interface in an integrated voice navigation services environment
US7974845B2 (en) 2008-02-15 2011-07-05 Sonitus Medical, Inc. Stuttering treatment methods and apparatus
US8270637B2 (en) * 2008-02-15 2012-09-18 Sonitus Medical, Inc. Headset systems and methods
US8023676B2 (en) 2008-03-03 2011-09-20 Sonitus Medical, Inc. Systems and methods to provide communication and monitoring of user status
US20090226020A1 (en) 2008-03-04 2009-09-10 Sonitus Medical, Inc. Dental bone conduction hearing appliance
US8150075B2 (en) 2008-03-04 2012-04-03 Sonitus Medical, Inc. Dental bone conduction hearing appliance
US20090270673A1 (en) * 2008-04-25 2009-10-29 Sonitus Medical, Inc. Methods and systems for tinnitus treatment
US8693698B2 (en) * 2008-04-30 2014-04-08 Qualcomm Incorporated Method and apparatus to reduce non-linear distortion in mobile computing devices
US8589161B2 (en) 2008-05-27 2013-11-19 Voicebox Technologies, Inc. System and method for an integrated, multi-modal, multi-device natural language voice services environment
US9305548B2 (en) 2008-05-27 2016-04-05 Voicebox Technologies Corporation System and method for an integrated, multi-modal, multi-device natural language voice services environment
CN103152498B (en) * 2008-06-11 2014-12-31 三菱电机株式会社 Echo canceler
US8855326B2 (en) * 2008-10-16 2014-10-07 Nxp, B.V. Microphone system and method of operating the same
TR201815047T4 (en) * 2008-12-22 2018-11-21 Anheuser Busch Inbev Sa Determining an acoustic coupling between a remote end signal and a composite signal.
US8401206B2 (en) * 2009-01-15 2013-03-19 Microsoft Corporation Adaptive beamformer using a log domain optimization criterion
US8326637B2 (en) 2009-02-20 2012-12-04 Voicebox Technologies, Inc. System and method for processing multi-modal device interactions in a natural language voice services environment
EP2222091B1 (en) * 2009-02-23 2013-04-24 Nuance Communications, Inc. Method for determining a set of filter coefficients for an acoustic echo compensation means
US8249862B1 (en) 2009-04-15 2012-08-21 Mediatek Inc. Audio processing apparatuses
JP5169986B2 (en) * 2009-05-13 2013-03-27 沖電気工業株式会社 Telephone device, echo canceller and echo cancellation program
AU2010301027B2 (en) 2009-10-02 2014-11-06 Soundmed, Llc Intraoral appliance for sound transmission via bone conduction
US9502025B2 (en) 2009-11-10 2016-11-22 Voicebox Technologies Corporation System and method for providing a natural language content dedication service
US9171541B2 (en) * 2009-11-10 2015-10-27 Voicebox Technologies Corporation System and method for hybrid processing in a natural language voice services environment
US9215527B1 (en) 2009-12-14 2015-12-15 Cirrus Logic, Inc. Multi-band integrated speech separating microphone array processor with adaptive beamforming
GB2493327B (en) 2011-07-05 2018-06-06 Skype Processing audio signals
US9711127B2 (en) 2011-09-19 2017-07-18 Bitwave Pte Ltd. Multi-sensor signal optimization for speech communication
GB2495129B (en) 2011-09-30 2017-07-19 Skype Processing signals
GB2495131A (en) 2011-09-30 2013-04-03 Skype A mobile device includes a received-signal beamformer that adapts to motion of the mobile device
GB2495128B (en) 2011-09-30 2018-04-04 Skype Processing signals
GB2495472B (en) * 2011-09-30 2019-07-03 Skype Processing audio signals
CN102509552B (en) * 2011-10-21 2013-09-11 浙江大学 Method for enhancing microphone array voice based on combined inhibition
GB2496660B (en) 2011-11-18 2014-06-04 Skype Processing audio signals
US8879761B2 (en) 2011-11-22 2014-11-04 Apple Inc. Orientation-based audio
GB201120392D0 (en) 2011-11-25 2012-01-11 Skype Ltd Processing signals
US8903108B2 (en) * 2011-12-06 2014-12-02 Apple Inc. Near-field null and beamforming
US9020163B2 (en) 2011-12-06 2015-04-28 Apple Inc. Near-field null and beamforming
GB2497343B (en) 2011-12-08 2014-11-26 Skype Processing audio signals
CN102543096B (en) * 2011-12-26 2014-08-13 上海聚力传媒技术有限公司 Method and device for suppressing scene noise during media file playing
US9768829B2 (en) 2012-05-11 2017-09-19 Intel Deutschland Gmbh Methods for processing audio signals and circuit arrangements therefor
US20130329908A1 (en) * 2012-06-08 2013-12-12 Apple Inc. Adjusting audio beamforming settings based on system state
US8885815B1 (en) * 2012-06-25 2014-11-11 Rawles Llc Null-forming techniques to improve acoustic echo cancellation
US9232072B2 (en) 2013-03-13 2016-01-05 Google Inc. Participant controlled spatial AEC
US9813808B1 (en) * 2013-03-14 2017-11-07 Amazon Technologies, Inc. Adaptive directional audio enhancement and selection
US9083782B2 (en) 2013-05-08 2015-07-14 Blackberry Limited Dual beamform audio echo reduction
WO2015041549A1 (en) * 2013-09-17 2015-03-26 Intel Corporation Adaptive phase difference based noise reduction for automatic speech recognition (asr)
US9516409B1 (en) 2014-05-19 2016-12-06 Apple Inc. Echo cancellation and control for microphone beam patterns
US20150371655A1 (en) * 2014-06-19 2015-12-24 Yang Gao Acoustic Echo Preprocessing for Speech Enhancement
US9613634B2 (en) * 2014-06-19 2017-04-04 Yang Gao Control of acoustic echo canceller adaptive filter for speech enhancement
WO2016044290A1 (en) 2014-09-16 2016-03-24 Kennewick Michael R Voice commerce
US9898459B2 (en) 2014-09-16 2018-02-20 Voicebox Technologies Corporation Integration of domain information into state transitions of a finite state transducer for natural language processing
EP3207467A4 (en) 2014-10-15 2018-05-23 VoiceBox Technologies Corporation System and method for providing follow-up responses to prior natural language inputs of a user
CN104392727A (en) * 2014-11-12 2015-03-04 华为技术有限公司 Audio signal processing method and related device
US10614799B2 (en) 2014-11-26 2020-04-07 Voicebox Technologies Corporation System and method of providing intent predictions for an utterance prior to a system detection of an end of the utterance
US10431214B2 (en) 2014-11-26 2019-10-01 Voicebox Technologies Corporation System and method of determining a domain and/or an action related to a natural language input
US9554207B2 (en) 2015-04-30 2017-01-24 Shure Acquisition Holdings, Inc. Offset cartridge microphones
US9565493B2 (en) 2015-04-30 2017-02-07 Shure Acquisition Holdings, Inc. Array microphone system and method of assembling the same
CN105427860B (en) * 2015-11-11 2019-09-03 百度在线网络技术（北京）有限公司 Far field audio recognition method and device
US9967081B2 (en) * 2015-12-04 2018-05-08 Hon Hai Precision Industry Co., Ltd. System and method for beamforming wth automatic amplitude and phase error calibration
US9659576B1 (en) 2016-06-13 2017-05-23 Biamp Systems Corporation Beam forming and acoustic echo cancellation with mutual adaptation control
US10331784B2 (en) 2016-07-29 2019-06-25 Voicebox Technologies Corporation System and method of disambiguating natural language processing requests
US10550849B2 (en) * 2016-12-12 2020-02-04 Garrett Transportation I Inc. Turbocharger assembly
JP7041156B6 (en) * 2017-01-03 2022-05-31 コーニンクレッカ フィリップス エヌ ヴェ Methods and equipment for audio capture using beamforming
US10367948B2 (en) 2017-01-13 2019-07-30 Shure Acquisition Holdings, Inc. Post-mixing acoustic echo cancellation systems and methods
US10182290B2 (en) 2017-02-23 2019-01-15 Microsoft Technology Licensing, Llc Covariance matrix estimation with acoustic imaging
US10090000B1 (en) * 2017-11-01 2018-10-02 GM Global Technology Operations LLC Efficient echo cancellation using transfer function estimation
WO2019231632A1 (en) 2018-06-01 2019-12-05 Shure Acquisition Holdings, Inc. Pattern-forming microphone array
US11297423B2 (en) 2018-06-15 2022-04-05 Shure Acquisition Holdings, Inc. Endfire linear array microphone
US10938994B2 (en) * 2018-06-25 2021-03-02 Cypress Semiconductor Corporation Beamformer and acoustic echo canceller (AEC) system
EP3854108A1 (en) 2018-09-20 2021-07-28 Shure Acquisition Holdings, Inc. Adjustable lobe shape for array microphones
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
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 (en) 2019-03-21 2021-12-24 舒尔获得控股公司 Housing and associated design features for ceiling array microphone
WO2020237206A1 (en) 2019-05-23 2020-11-26 Shure Acquisition Holdings, Inc. Steerable speaker array, system, and method for the same
WO2020243471A1 (en) 2019-05-31 2020-12-03 Shure Acquisition Holdings, Inc. Low latency automixer integrated with voice and noise activity detection
JP2022545113A (en) 2019-08-23 2022-10-25 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 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
JP2024505068A (en) 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 Hybrid audio beamforming system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007624A1 (en) * 1995-08-21 1997-02-27 Telefonaktiebolaget Lm Ericsson (Publ) Echo cancelling using signal preprocessing in an acoustic environment
EP0854625A2 (en) * 1992-11-12 1998-07-22 Motorola, Inc. Apparatus and method for noise reduction for a full-duplex speakerphone or the like
WO2000018099A1 (en) * 1998-09-18 2000-03-30 Andrea Electronics Corporation Interference canceling method and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6535609B1 (en) * 1997-06-03 2003-03-18 Lear Automotive Dearborn, Inc. Cabin communication system
US6549627B1 (en) * 1998-01-30 2003-04-15 Telefonaktiebolaget Lm Ericsson Generating calibration signals for an adaptive beamformer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0854625A2 (en) * 1992-11-12 1998-07-22 Motorola, Inc. Apparatus and method for noise reduction for a full-duplex speakerphone or the like
WO1997007624A1 (en) * 1995-08-21 1997-02-27 Telefonaktiebolaget Lm Ericsson (Publ) Echo cancelling using signal preprocessing in an acoustic environment
WO2000018099A1 (en) * 1998-09-18 2000-03-30 Andrea Electronics Corporation Interference canceling method and apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KELLERMANN W: "STRATEGIES FOR COMBINING ACOUSTIC ECHO CANCELLATION AND ADAPTIVE BEAMFORMING MICROPHONE ARRAYS", 1997 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING. PLENARY, EXPERT SUMMARIES, SPECIAL, AUDIO, UNDERWATER ACOUSTICS, VLSI. MUNICH, APR. 21 - 24, 1997, vol. 1, 21 April 1997 (1997-04-21), pages 219 - 222, XP000789157, ISBN: 0-8186-7920-4 *

Also Published As

Publication number Publication date
DE60129955D1 (en) 2007-09-27
JP2003535510A (en) 2003-11-25
EP1287672B1 (en) 2007-08-15
CN1451226A (en) 2003-10-22
CN100477704C (en) 2009-04-08
EP1287672A2 (en) 2003-03-05
ATE370608T1 (en) 2007-09-15
US20020015500A1 (en) 2002-02-07
US7035415B2 (en) 2006-04-25
WO2001093554A2 (en) 2001-12-06

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