DE69332309T2 - Ausfallgesichertes betriebsverfahren in einem lautfernsprechsystem - Google Patents

Ausfallgesichertes betriebsverfahren in einem lautfernsprechsystem

Info

Publication number
DE69332309T2
DE69332309T2 DE69332309T DE69332309T DE69332309T2 DE 69332309 T2 DE69332309 T2 DE 69332309T2 DE 69332309 T DE69332309 T DE 69332309T DE 69332309 T DE69332309 T DE 69332309T DE 69332309 T2 DE69332309 T2 DE 69332309T2
Authority
DE
Germany
Prior art keywords
failure
operating procedure
speaker system
proof operating
proof
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.)
Expired - Fee Related
Application number
DE69332309T
Other languages
English (en)
Other versions
DE69332309D1 (de
Inventor
Shan-Shan Huang
L Hinman
K Gaut
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.)
Polycom Inc
Original Assignee
Polycom 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 Polycom Inc filed Critical Polycom Inc
Publication of DE69332309D1 publication Critical patent/DE69332309D1/de
Application granted granted Critical
Publication of DE69332309T2 publication Critical patent/DE69332309T2/de
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)
DE69332309T 1992-07-02 1993-06-28 Ausfallgesichertes betriebsverfahren in einem lautfernsprechsystem Expired - Fee Related DE69332309T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US90906092A 1992-07-02 1992-07-02
US07/943,732 US5365583A (en) 1992-07-02 1992-09-11 Method for fail-safe operation in a speaker phone system
PCT/US1993/006140 WO1994001957A1 (en) 1992-07-02 1993-06-28 Method for fail-safe operation in a speaker phone system

Publications (2)

Publication Number Publication Date
DE69332309D1 DE69332309D1 (de) 2002-10-24
DE69332309T2 true DE69332309T2 (de) 2003-05-22

Family

ID=27129514

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69332309T Expired - Fee Related DE69332309T2 (de) 1992-07-02 1993-06-28 Ausfallgesichertes betriebsverfahren in einem lautfernsprechsystem

Country Status (5)

Country Link
US (1) US5365583A (de)
EP (1) EP0648397B1 (de)
JP (1) JPH07508866A (de)
DE (1) DE69332309T2 (de)
WO (1) WO1994001957A1 (de)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281680B (en) * 1993-08-27 1998-08-26 Motorola Inc A voice activity detector for an echo suppressor and an echo suppressor
JP2765494B2 (ja) * 1994-11-09 1998-06-18 日本電気株式会社 ２線式音声会議装置
DE4445877A1 (de) * 1994-12-22 1996-06-27 Philips Patentverwaltung Verfahren und Anordnung zur Echokompensation
US5668859A (en) * 1994-12-28 1997-09-16 Lucent Technologies Inc. Apparatus and method for connecting remote callers to loudspeakers or other projecting means in an event facility
US5561668A (en) * 1995-07-06 1996-10-01 Coherent Communications Systems Corp. Echo canceler with subband attenuation and noise injection control
US5612996A (en) * 1995-09-21 1997-03-18 Rockwell International Corporation Loop gain processing system for speakerphone applications
US5764753A (en) * 1995-09-29 1998-06-09 Crystal Semiconductor Corp. Half-duplex controller
US5631900A (en) * 1995-09-29 1997-05-20 Crystal Semiconductor Double-Talk detector for echo canceller
US6165308A (en) * 1998-11-06 2000-12-26 Lilly Industries, Inc. In-press process for coating composite substrates
US6269161B1 (en) * 1999-05-20 2001-07-31 Signalworks, Inc. System and method for near-end talker detection by spectrum analysis
EP1226578A4 (de) * 1999-12-31 2005-09-21 Octiv Inc Techniken zur verbesserung der klarheit und verständlichkeit von mit verminderten bitraten übertragenden audiosignalen in einem digitalen netzwerk
US20020075965A1 (en) * 2000-12-20 2002-06-20 Octiv, Inc. Digital signal processing techniques for improving audio clarity and intelligibility
US20030023429A1 (en) * 2000-12-20 2003-01-30 Octiv, Inc. Digital signal processing techniques for improving audio clarity and intelligibility
US6785382B2 (en) * 2001-02-12 2004-08-31 Signalworks, Inc. System and method for controlling a filter to enhance speakerphone performance
US7236929B2 (en) * 2001-05-09 2007-06-26 Plantronics, Inc. Echo suppression and speech detection techniques for telephony applications
US7221659B1 (en) 2001-12-31 2007-05-22 Cisco Technology, Inc. Method and system for managing erroneous attenuation of signal
US7433462B2 (en) * 2002-10-31 2008-10-07 Plantronics, Inc Techniques for improving telephone audio quality
US7680265B2 (en) * 2003-12-12 2010-03-16 Continental Automotive Systems, Inc. Echo canceler circuit and method
US7599483B2 (en) * 2003-12-12 2009-10-06 Temic Automotive Of North America, Inc. Echo canceler circuit and method
US7250434B2 (en) * 2003-12-22 2007-07-31 Janssen Pharmaceutica N.V. CCK-1 receptor modulators
US7654230B2 (en) * 2004-06-07 2010-02-02 Kroll Family Trust Domestic animal telephone
US20050285935A1 (en) * 2004-06-29 2005-12-29 Octiv, Inc. Personal conferencing node
US20050286443A1 (en) * 2004-06-29 2005-12-29 Octiv, Inc. Conferencing system
US7734036B1 (en) * 2004-09-14 2010-06-08 Cisco Technology, Inc. Dynamic attenuation method and apparatus for optimizing voice quality using echo cancellers
US7760887B2 (en) * 2004-10-15 2010-07-20 Lifesize Communications, Inc. Updating modeling information based on online data gathering
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
US8116500B2 (en) * 2004-10-15 2012-02-14 Lifesize Communications, Inc. Microphone orientation and size in a speakerphone
US7720236B2 (en) * 2004-10-15 2010-05-18 Lifesize Communications, Inc. Updating modeling information based on offline calibration experiments
US20060132595A1 (en) * 2004-10-15 2006-06-22 Kenoyer Michael L Speakerphone supporting video and audio features
US7903137B2 (en) * 2004-10-15 2011-03-08 Lifesize Communications, Inc. Videoconferencing echo cancellers
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
KR100746400B1 (ko) 2005-10-24 2007-08-03 주식회사 팬택앤큐리텔 에코 신호 제거 방법
US7995713B2 (en) * 2006-04-03 2011-08-09 Agere Systems Inc. Voice-identification-based signal processing for multiple-talker applications
JP4340676B2 (ja) * 2006-10-11 2009-10-07 本田技研工業株式会社 制御装置
US9191493B2 (en) 2013-12-09 2015-11-17 Captioncall, Llc Methods and devices for updating an adaptive filter for echo cancellation
US9479650B1 (en) 2015-05-04 2016-10-25 Captioncall, Llc Methods and devices for updating filter coefficients during echo cancellation

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4282411A (en) * 1979-06-04 1981-08-04 Tellabs, Inc. Residual echo suppressor for echo canceller
FR2518853A1 (fr) * 1981-12-23 1983-06-24 Cit Alcatel Annuleur numerique d'echos
US4600815A (en) * 1982-07-30 1986-07-15 Communications Satellite Corporation Automatic gain control for echo cancellers and similar adaptive systems
JPS5961321A (ja) * 1982-09-30 1984-04-07 Nec Corp エコ−信号抑圧装置
JPS59151546A (ja) * 1983-02-18 1984-08-30 Nec Corp 適応形反響消去装置
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
CA1240431A (en) * 1985-03-01 1988-08-09 Nippon Telegraph And Telephone Corporation Speech additive distribution equipment for conferencing system
CA1233925A (en) * 1985-05-10 1988-03-08 Gordon J. Reesor Digital loudspeaking telephone
CA1242541A (en) * 1985-11-25 1988-09-27 Dany Sylvain Echo cancellation in two-wire transmission path repeaters
US4720856A (en) * 1986-09-02 1988-01-19 Motorola, Inc. Control circuit having a direct current control loop for controlling the gain of an attenuator
US4724540A (en) * 1986-09-02 1988-02-09 Motorola, Inc. Speakerphone with fast idle mode
FR2612029B1 (fr) * 1987-03-03 1989-05-12 Connan Jean Louis Dispositif pour la realisation de la fonction " mains-libres " dans un poste telephonique, associant les fonctions de commutation de gain et d'annulation d'echo
US4845746A (en) * 1987-06-23 1989-07-04 Rockwell International Corporation Echo canceller with relative feedback control
NL8701633A (nl) * 1987-07-10 1989-02-01 Philips Nv Digitale echocompensator.
JP2751244B2 (ja) * 1988-02-18 1998-05-18 日本電気株式会社 ハンズフリー回路及びハンズフリー制御方式
US4918727A (en) * 1988-06-09 1990-04-17 Tellabs Incorporated Double talk detector for echo canceller and method
US4912758A (en) * 1988-10-26 1990-03-27 International Business Machines Corporation Full-duplex digital speakerphone
DE3840433A1 (de) * 1988-12-01 1990-06-07 Philips Patentverwaltung Echokompensator
US4965822A (en) * 1989-04-10 1990-10-23 Videotelecom Corp. Full duplex speakerphone
CA2001277C (en) * 1989-10-24 1994-07-12 Bruce Leigh Townsend Hands free telecommunications apparatus and method

Also Published As

Publication number Publication date
US5365583A (en) 1994-11-15
WO1994001957A1 (en) 1994-01-20
JPH07508866A (ja) 1995-09-28
EP0648397B1 (de) 2002-09-18
DE69332309D1 (de) 2002-10-24
EP0648397A1 (de) 1995-04-19
EP0648397A4 (de) 1999-05-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee