DE69024877D1 - Anordnung zur Echoverarbeitung, insbesondere akustisch, für Fernsprechleitung - Google Patents

Anordnung zur Echoverarbeitung, insbesondere akustisch, für Fernsprechleitung

Info

Publication number
DE69024877D1
DE69024877D1 DE69024877T DE69024877T DE69024877D1 DE 69024877 D1 DE69024877 D1 DE 69024877D1 DE 69024877 T DE69024877 T DE 69024877T DE 69024877 T DE69024877 T DE 69024877T DE 69024877 D1 DE69024877 D1 DE 69024877D1
Authority
DE
Germany
Prior art keywords
arrangement
telephone lines
echo processing
particular acoustically
acoustically
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 - Lifetime
Application number
DE69024877T
Other languages
English (en)
Other versions
DE69024877T2 (de
Inventor
Jean-Pascal Jullien Je Jullien
Tourneur Gregoire Le
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.)
Orange SA
Original Assignee
France Telecom SA
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 France Telecom SA filed Critical France Telecom SA
Application granted granted Critical
Publication of DE69024877D1 publication Critical patent/DE69024877D1/de
Publication of DE69024877T2 publication Critical patent/DE69024877T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence
DE69024877T 1989-08-18 1990-08-20 Anordnung zur Echoverarbeitung, insbesondere akustisch, für Fernsprechleitung Expired - Lifetime DE69024877T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR898911026A FR2651077B1 (fr) 1989-08-18 1989-08-18 Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique

Publications (2)

Publication Number Publication Date
DE69024877D1 true DE69024877D1 (de) 1996-02-29
DE69024877T2 DE69024877T2 (de) 1996-09-12

Family

ID=9384802

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69024877T Expired - Lifetime DE69024877T2 (de) 1989-08-18 1990-08-20 Anordnung zur Echoverarbeitung, insbesondere akustisch, für Fernsprechleitung

Country Status (6)

Country Link
US (1) US5343521A (de)
EP (1) EP0413641B1 (de)
JP (1) JPH04501498A (de)
DE (1) DE69024877T2 (de)
FR (1) FR2651077B1 (de)
WO (1) WO1991003116A1 (de)

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DK0570493T3 (da) * 1991-02-08 2000-06-26 Diatide Inc Technetium-99m-mærkede polypeptider til billeddannelse.
US7238340B1 (en) 1991-11-27 2007-07-03 Cis Bio International Monoamine, diamide, thiol-containing metal chelating agents
US5645815A (en) * 1991-02-08 1997-07-08 Diatide, Inc. Radiolabled compounds for thrombus imaging
FR2675648B1 (fr) * 1991-04-19 1993-08-20 France Telecom Dispositif de traitement de l'echo residuel d'un annuleur du signal d'echo d'un signal numerique de parole.
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EP0641222B1 (de) * 1992-05-21 2000-09-06 Diatide, Inc. Technetium-99m markierte peptide zur bilderzeugung von thrombus
US5968476A (en) * 1992-05-21 1999-10-19 Diatide, Inc. Technetium-99m labeled peptides for thrombus imaging
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US5548638A (en) * 1992-12-21 1996-08-20 Iwatsu Electric Co., Ltd. Audio teleconferencing apparatus
US5864560A (en) 1993-01-08 1999-01-26 Multi-Tech Systems, Inc. Method and apparatus for mode switching in a voice over data computer-based personal communications system
US6009082A (en) 1993-01-08 1999-12-28 Multi-Tech Systems, Inc. Computer-based multifunction personal communication system with caller ID
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US5546395A (en) 1993-01-08 1996-08-13 Multi-Tech Systems, Inc. Dynamic selection of compression rate for a voice compression algorithm in a voice over data modem
US5453986A (en) 1993-01-08 1995-09-26 Multi-Tech Systems, Inc. Dual port interface for a computer-based multifunction personal communication system
US5625684A (en) * 1993-02-04 1997-04-29 Local Silence, Inc. Active noise suppression system for telephone handsets and method
DE4305256A1 (de) * 1993-02-20 1994-08-25 Sel Alcatel Ag Verfahren zum Verbessern der akustischen Rückhördämpfung von elektroakustischen Anlagen
FR2702617B1 (fr) * 1993-03-08 1995-06-09 Le Scan Patrice Procede et dispositif de traitement d'echo entre deux voies de transmission presentant entre elles un couplage.
JPH06338829A (ja) * 1993-05-28 1994-12-06 American Teleph & Telegr Co <Att> 通信システム内の反響除去方法と装置
GB2281680B (en) * 1993-08-27 1998-08-26 Motorola Inc A voice activity detector for an echo suppressor and an echo suppressor
FR2715784B1 (fr) * 1994-02-02 1996-03-29 Jacques Prado Procédé et dispositif d'analyse d'un signal de retour et annuleur d'écho adaptatif en comportant application.
ZA95599B (en) * 1994-02-28 1996-02-06 Qualcomm Inc Doubletalk detection by means of spectral content
US5757801A (en) 1994-04-19 1998-05-26 Multi-Tech Systems, Inc. Advanced priority statistical multiplexer
US5682386A (en) 1994-04-19 1997-10-28 Multi-Tech Systems, Inc. Data/voice/fax compression multiplexer
US5668871A (en) * 1994-04-29 1997-09-16 Motorola, Inc. Audio signal processor and method therefor for substantially reducing audio feedback in a cummunication unit
JPH0832494A (ja) * 1994-07-13 1996-02-02 Mitsubishi Electric Corp ハンズフリー通話装置
JP2643852B2 (ja) * 1994-08-31 1997-08-20 日本電気株式会社 エコーキャンセラ
JPH08125593A (ja) * 1994-10-28 1996-05-17 Fujitsu Ltd フィルタ係数の推定装置
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
JPH08204619A (ja) * 1995-01-26 1996-08-09 Nec Corp エコーサプレッサ
US5852661A (en) * 1995-02-17 1998-12-22 Advanced Micro Devices, Inc. Adaptive echo cancellation used with echo suppression to reduce short and long duration echoes
FR2731123B1 (fr) * 1995-02-27 1997-05-09 Prescom Sarl Correction de gain de haut-parleur pour un terminal telephonique mains-libres
US5761638A (en) * 1995-03-17 1998-06-02 Us West Inc Telephone network apparatus and method using echo delay and attenuation
JP2928130B2 (ja) * 1995-04-19 1999-08-03 埼玉日本電気株式会社 ハンズフリー通信装置
US5592548A (en) * 1995-05-31 1997-01-07 Qualcomm Incorporated System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
US5612996A (en) * 1995-09-21 1997-03-18 Rockwell International Corporation Loop gain processing system for speakerphone applications
US5675644A (en) * 1995-09-26 1997-10-07 Qualcomm Incorporated Method and apparatus for canceling echo accounting for delay variations
US5812537A (en) * 1995-09-29 1998-09-22 Paradyne Corporation Echo canceling method and apparatus for data over cellular
US5764753A (en) * 1995-09-29 1998-06-09 Crystal Semiconductor Corp. Half-duplex controller
US5923749A (en) * 1995-12-06 1999-07-13 Telefonaktiebolaget Lm Ericsson Method and system for eliminating acoustic echos in a digital telecommunication system
US5668865A (en) * 1996-02-26 1997-09-16 Lucent Technologies Inc. Echo canceler E-side speech detector
TW432855B (en) * 1996-04-25 2001-05-01 Mitsubishi Electric Corp Echo eliminator
FR2748174B1 (fr) * 1996-04-30 1998-06-26 Sagem Poste telephonique mains-libres
US5838787A (en) * 1996-06-27 1998-11-17 Northern Telecom Limited Method and system for controlling echo return loss using a complementary variolosses in transmit path
US5796819A (en) * 1996-07-24 1998-08-18 Ericsson Inc. Echo canceller for non-linear circuits
US5796818A (en) * 1996-08-08 1998-08-18 Northern Telecom Limited Dynamic optimization of handsfree microphone gain
EP0895688B1 (de) * 1997-01-23 2006-02-15 Motorola, Inc. Gerät und verfahren für nichtlineare verarbeitung in einem kommunikationssystem
DE19753224C2 (de) * 1997-12-01 2000-05-25 Deutsche Telekom Ag Verfahren und Vorrichtung zur Echounterdrückung bei einer Freisprecheinrichtung, insbesondere für ein Telefon
US6178162B1 (en) * 1997-12-19 2001-01-23 Nortel Networks Corporation Method and apparatus for inhibiting echo in a channel of a communication system
US6236645B1 (en) * 1998-03-09 2001-05-22 Broadcom Corporation Apparatus for, and method of, reducing noise in a communications system
WO2001096984A2 (en) * 2000-06-14 2001-12-20 Sleep Solutions, Inc. Secure test and test result delivery system
US6744884B1 (en) * 2000-09-29 2004-06-01 Skyworks Solutions, Inc. Speaker-phone system change and double-talk detection
KR20020058116A (ko) * 2000-12-29 2002-07-12 조미화 음성 제어 텔레비젼 수상기 및 음성 제어 방법
US6889066B2 (en) * 2001-03-27 2005-05-03 Qualcomm Incorporated Network echo suppression in mobile stations
US7280737B2 (en) * 2004-02-23 2007-10-09 Warner Bros. Entertainment Inc. Method and apparatus for discouraging commercial skipping
US7395790B2 (en) * 2004-11-18 2008-07-08 S&S Cycle, Inc. Reed valve breather for evolution engine
RU2011118860A (ru) * 2011-05-12 2012-11-20 ЭлЭсАй Корпорейшн (US) Устройство (варианты) и способ обнаружения быстрых изменений коэффициента усиления эхо-сигнала в сети
EP2706670A3 (de) * 2012-09-06 2014-05-07 ST-Ericsson SA Verfahren in einem Prädiktionsfilter und ein solcher Prädiktionsfilter
US9456276B1 (en) * 2014-09-30 2016-09-27 Amazon Technologies, Inc. Parameter selection for audio beamforming

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US3499999A (en) * 1966-10-31 1970-03-10 Bell Telephone Labor Inc Closed loop adaptive echo canceller using generalized filter networks
US4129753A (en) * 1977-12-09 1978-12-12 Bell Telephone Laboratories, Incorporated Echo canceller using feedback to improve speech detector performance
US4707824A (en) * 1983-12-15 1987-11-17 Nec Corporation Method and apparatus for cancelling echo
US4712235A (en) * 1984-11-19 1987-12-08 International Business Machines Corporation Method and apparatus for improved control and time sharing of an echo canceller
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
JPS62117A (ja) * 1985-03-25 1987-01-06 Hitachi Denshi Ltd 適応デイジタルフイルタ
CA1242541A (en) * 1985-11-25 1988-09-27 Dany Sylvain Echo cancellation in two-wire transmission path repeaters
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
US4894820A (en) * 1987-03-24 1990-01-16 Oki Electric Industry Co., Ltd. Double-talk detection in an echo canceller
DE3887057T2 (de) * 1987-10-02 1994-08-25 Advanced Micro Devices Inc Adaptiver Echokompensator mit Doppel-Spracherkennung.

Also Published As

Publication number Publication date
EP0413641A1 (de) 1991-02-20
FR2651077B1 (fr) 1994-06-10
DE69024877T2 (de) 1996-09-12
JPH04501498A (ja) 1992-03-12
US5343521A (en) 1994-08-30
EP0413641B1 (de) 1996-01-17
FR2651077A1 (fr) 1991-02-22
WO1991003116A1 (fr) 1991-03-07

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Legal Events

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8364 No opposition during term of opposition