DE68916218D1 - Rechnergesteuerter anpassungsfähiger Lautfernsprecher. - Google Patents

Rechnergesteuerter anpassungsfähiger Lautfernsprecher.

Info

Publication number
DE68916218D1
DE68916218D1 DE68916218T DE68916218T DE68916218D1 DE 68916218 D1 DE68916218 D1 DE 68916218D1 DE 68916218 T DE68916218 T DE 68916218T DE 68916218 T DE68916218 T DE 68916218T DE 68916218 D1 DE68916218 D1 DE 68916218D1
Authority
DE
Germany
Prior art keywords
loudspeaker
computer controlled
adaptable
controlled adaptable
computer
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
DE68916218T
Other languages
English (en)
Other versions
DE68916218T2 (de
Inventor
Richard Henry Erving
William Albert Ford
Robert Raymond Ii Miller
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co 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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Application granted granted Critical
Publication of DE68916218D1 publication Critical patent/DE68916218D1/de
Publication of DE68916218T2 publication Critical patent/DE68916218T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04M9/085—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 digital techniques
DE68916218T 1988-12-28 1989-12-19 Rechnergesteuerter anpassungsfähiger Lautfernsprecher. Expired - Lifetime DE68916218T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/298,531 US5007046A (en) 1988-12-28 1988-12-28 Computer controlled adaptive speakerphone

Publications (2)

Publication Number Publication Date
DE68916218D1 true DE68916218D1 (de) 1994-07-21
DE68916218T2 DE68916218T2 (de) 1995-02-02

Family

ID=23150921

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68916218T Expired - Lifetime DE68916218T2 (de) 1988-12-28 1989-12-19 Rechnergesteuerter anpassungsfähiger Lautfernsprecher.

Country Status (8)

Country Link
US (1) US5007046A (de)
EP (1) EP0376582B1 (de)
JP (1) JPH02260856A (de)
AU (1) AU615820B2 (de)
CA (1) CA2004171C (de)
DE (1) DE68916218T2 (de)
ES (1) ES2055796T3 (de)
HK (1) HK43595A (de)

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US5021783A (en) * 1990-09-27 1991-06-04 Advanced Micro Devices, Inc. Method for operating an apparatus for facilitating communications
JP2634946B2 (ja) * 1990-11-19 1997-07-30 日本電気株式会社 ハンズフリー補助回路
US5187741A (en) * 1990-11-30 1993-02-16 At&T Bell Laboratories Enhanced acoustic calibration procedure for a voice switched speakerphone
FI89658C (fi) * 1991-11-04 1993-10-25 Nokia Telecommunications Oy Arrangemang foer styrning av en ekoslaeckare
US5297198A (en) * 1991-12-27 1994-03-22 At&T Bell Laboratories Two-way voice communication methods and apparatus
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
CA2151073A1 (en) 1994-07-28 1996-01-29 Bishnu Saroop Atal Intelligent human interface system
GB2293520A (en) * 1994-09-22 1996-03-27 Motorola Semiconducteurs Telephone circuit
US5715309A (en) * 1995-03-03 1998-02-03 Advanced Micro Devices, Inc. Conversion of compressed speech codes between attenuated and unattenuated formats
US5631899A (en) * 1995-05-31 1997-05-20 Lucent Technologies Inc. Acoustic echo canceler
US5825753A (en) * 1995-09-29 1998-10-20 Paradyne Corporation Echo canceler gain tracker for cellular modems
US5812537A (en) * 1995-09-29 1998-09-22 Paradyne Corporation Echo canceling method and apparatus for data over cellular
US5815496A (en) * 1995-09-29 1998-09-29 Lucent Technologies Inc. Cascade echo canceler arrangement
US5867573A (en) * 1996-02-06 1999-02-02 Lucent Technologies Inc. Telephone handset interface with feedback control
JP3483695B2 (ja) * 1996-03-14 2004-01-06 株式会社リコー 音声通信装置
DE19620031C1 (de) * 1996-05-17 1997-05-28 Siemens Ag Verfahren zur automatischen Justierung einer Schalteinrichtung zum automatischen Umschalten zwischen einer Empfangsbetriebsart und einer Sendebetriebsart bei einer Freisprecheinrichtung eines Kommunikationsendgerätes
US5907538A (en) 1997-02-18 1999-05-25 White; Donald R. Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input
US7072476B2 (en) * 1997-02-18 2006-07-04 Matech, Inc. Audio headset
US6442213B1 (en) * 1997-04-22 2002-08-27 Silicon Laboratories Inc. Digital isolation system with hybrid circuit in ADC calibration loop
US5867574A (en) 1997-05-19 1999-02-02 Lucent Technologies Inc. Voice activity detection system and method
US7046795B2 (en) * 1997-06-25 2006-05-16 Intel Corporation Method and apparatus for active latency characterization
US6868157B1 (en) 1997-09-16 2005-03-15 Sanyo Electric Co., Ltd. Echo canceling method, echo canceller and voice switch
US6408070B2 (en) * 1998-04-30 2002-06-18 Nortel Networks Limited Method and apparatus for echo control in a communication system
US6385176B1 (en) 1998-06-04 2002-05-07 Lucent Technologies Inc. Communication system based on echo canceler tap profile
US6173056B1 (en) * 1998-08-25 2001-01-09 Ericsson Inc. Methods for adjusting audio signals responsive to changes in a power supply level and related communications devices
US6535604B1 (en) * 1998-09-04 2003-03-18 Nortel Networks Limited Voice-switching device and method for multiple receivers
EP1163787A2 (de) * 1999-03-15 2001-12-19 Vocaltec Communications Ltd. Verfahren und vorrichtung zur unterdrückung von echos
DE19919370C2 (de) * 1999-04-28 2003-05-28 Siemens Ag Freisprecheinrichtung und Verfahren zum Betrieb einer solchen
GB2375688B (en) * 2001-05-14 2004-09-29 Motorola Ltd Telephone apparatus and a communication method using such apparatus
CA2537944C (en) * 2003-10-08 2010-11-30 Cisco Technology, Inc. System and method for performing distributed video conferencing
US8081205B2 (en) * 2003-10-08 2011-12-20 Cisco Technology, Inc. Dynamically switched and static multiple video streams for a multimedia conference
US8659636B2 (en) 2003-10-08 2014-02-25 Cisco Technology, Inc. System and method for performing distributed video conferencing
US7826805B2 (en) * 2003-11-11 2010-11-02 Matech, Inc. Automatic-switching wireless communication device
KR100851286B1 (ko) * 2003-11-11 2008-08-08 마테크, 인코포레이티드 단일 트랜스듀서를 갖는 쌍방향 통신 장치
US8315379B2 (en) * 2004-11-10 2012-11-20 Matech, Inc. Single transducer full duplex talking circuit
US20070033030A1 (en) * 2005-07-19 2007-02-08 Oded Gottesman Techniques for measurement, adaptation, and setup of an audio communication system
US8614732B2 (en) * 2005-08-24 2013-12-24 Cisco Technology, Inc. System and method for performing distributed multipoint video conferencing
US8713105B2 (en) * 2006-01-03 2014-04-29 Cisco Technology, Inc. Method and apparatus for transcoding and transrating in distributed video systems
US8427956B1 (en) 2006-03-06 2013-04-23 Cisco Technology, Inc. Facilitating packet flow in a communication network implementing load balancing and security operations
US8195095B2 (en) * 2006-05-19 2012-06-05 International Business Machines Corporation Mitigating audible acknowledgement volume in a vehicle security system
US7558823B2 (en) * 2006-05-31 2009-07-07 Hewlett-Packard Development Company, L.P. System and method for managing virtual collaboration systems
US7907594B2 (en) * 2006-06-01 2011-03-15 Cisco Technology, Inc. Marking keyframes for a communication session
US8054966B2 (en) * 2006-07-21 2011-11-08 Sony Ericsson Mobile Communications Ab Echo cancellation and noise reduction adaptation during ringing signal playback
US7911955B2 (en) * 2007-01-31 2011-03-22 Hewlett-Packard Development Company, L.P. Coordinated media control system
US8103363B2 (en) * 2007-01-31 2012-01-24 Hewlett-Packard Development Company, L.P. Device control system
US8334891B2 (en) 2007-03-05 2012-12-18 Cisco Technology, Inc. Multipoint conference video switching
US8264521B2 (en) 2007-04-30 2012-09-11 Cisco Technology, Inc. Media detection and packet distribution in a multipoint conference
US8179422B2 (en) 2007-12-20 2012-05-15 Cisco Technology, Inc. System and method for video conferencing
DE102008009446A1 (de) 2008-02-15 2009-08-20 Volkswagen Ag Verfahren zur Prüfung eines komplexen Systems auf Abweichungen von Qualitätsvorgaben und/oder auf Fehlerhaftigkeit und Vorrichtung zur Unterstützung einer Prüfperson bei einer solchen Prüfung

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US4368361A (en) * 1980-07-28 1983-01-11 Bell Telephone Laboratories, Incorporated Automatically adjustable bidirectional-to-unidirectional transmission network
US4368362A (en) * 1980-07-28 1983-01-11 Bell Telephone Laboratories, Incorporated Automatic telephone loaded/nonloaded facility type identification circuit
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
JPS5890832A (ja) * 1981-11-26 1983-05-30 Toshiba Corp 反響打消し装置
GB2137458B (en) * 1983-03-01 1986-11-19 Standard Telephones Cables Ltd Digital handsfree telephone
JPS59193660A (ja) * 1983-04-18 1984-11-02 Nec Corp 会議電話装置
IL70046A0 (en) * 1983-10-25 1984-01-31 Israel Electronics Corp Echo eliminator
JPS60117928A (ja) * 1983-11-30 1985-06-25 Fujitsu Ltd エコ−キヤンセラの収束方式
JPS60126950A (ja) * 1983-12-13 1985-07-06 Toshiba Corp 拡声電話装置
JPS613536A (ja) * 1984-06-18 1986-01-09 Toshiba Corp 反響信号打消し装置
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
JPS61195061A (ja) * 1985-02-25 1986-08-29 Fujitsu Ltd 音声会議装置の音量調整器
CA1233925A (en) * 1985-05-10 1988-03-08 Gordon J. Reesor Digital loudspeaking telephone
FI73341C (fi) * 1985-08-06 1987-09-10 Outel Oy Mellanfoerstaerkare som anvaends i tvaoledningsfoerbindelser i ett valbart telefonnaet samt foerfarande foer reglering av dess foerstaerkning.
JPS6260343A (ja) * 1985-09-10 1987-03-17 Seiko Epson Corp 電話器
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone

Also Published As

Publication number Publication date
AU615820B2 (en) 1991-10-10
CA2004171A1 (en) 1990-06-28
CA2004171C (en) 1994-08-02
US5007046A (en) 1991-04-09
JPH0544220B2 (de) 1993-07-05
DE68916218T2 (de) 1995-02-02
HK43595A (en) 1995-03-31
JPH02260856A (ja) 1990-10-23
AU4721689A (en) 1990-07-05
EP0376582A3 (en) 1990-12-05
EP0376582A2 (de) 1990-07-04
EP0376582B1 (de) 1994-06-15
ES2055796T3 (es) 1994-09-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: BLUMBACH, KRAMER & PARTNER, 65193 WIESBADEN

8339 Ceased/non-payment of the annual fee