DE68916221D1 - Selbstabgleichungsanordnung für einen sprachumschaltbaren Lautfernsprecher. - Google Patents

Selbstabgleichungsanordnung für einen sprachumschaltbaren Lautfernsprecher.

Info

Publication number
DE68916221D1
DE68916221D1 DE68916221T DE68916221T DE68916221D1 DE 68916221 D1 DE68916221 D1 DE 68916221D1 DE 68916221 T DE68916221 T DE 68916221T DE 68916221 T DE68916221 T DE 68916221T DE 68916221 D1 DE68916221 D1 DE 68916221D1
Authority
DE
Germany
Prior art keywords
switchable
loudspeaker
language
self
balancing arrangement
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
DE68916221T
Other languages
English (en)
Other versions
DE68916221T2 (de
Inventor
Richard Henry Erving
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 DE68916221D1 publication Critical patent/DE68916221D1/de
Publication of DE68916221T2 publication Critical patent/DE68916221T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Set Structure (AREA)
DE68916221T 1988-12-28 1989-12-19 Selbstabgleichungsanordnung für einen sprachumschaltbaren Lautfernsprecher. Expired - Lifetime DE68916221T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/290,772 US4887288A (en) 1988-12-28 1988-12-28 Self calibration arrangement for a voice switched speakerphone

Publications (2)

Publication Number Publication Date
DE68916221D1 true DE68916221D1 (de) 1994-07-21
DE68916221T2 DE68916221T2 (de) 1995-02-02

Family

ID=23117494

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68916221T Expired - Lifetime DE68916221T2 (de) 1988-12-28 1989-12-19 Selbstabgleichungsanordnung für einen sprachumschaltbaren Lautfernsprecher.

Country Status (9)

Country Link
US (1) US4887288A (de)
EP (1) EP0376589B1 (de)
JP (1) JPH0654927B2 (de)
KR (1) KR970010838B1 (de)
AU (1) AU615819B2 (de)
CA (1) CA2004169C (de)
DE (1) DE68916221T2 (de)
ES (1) ES2055799T3 (de)
HK (1) HK148694A (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
AU7216991A (en) * 1990-02-08 1991-09-03 Chesilvale Electronics Limited Programmable telephone
US5172410A (en) * 1990-04-26 1992-12-15 Sound Control Technologies, Inc. Conference telephone system and method
US5187741A (en) * 1990-11-30 1993-02-16 At&T Bell Laboratories Enhanced acoustic calibration procedure for a voice switched speakerphone
DE4130045A1 (de) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes
US5297198A (en) * 1991-12-27 1994-03-22 At&T Bell Laboratories Two-way voice communication methods and apparatus
JPH0669834A (ja) * 1992-08-24 1994-03-11 Mitsubishi Electric Corp ２線４線変換器
US5506885A (en) * 1994-08-11 1996-04-09 Hamilton; Chris Method of adapting processing parameters in a call processing system
DE4447028C1 (de) * 1994-12-29 1996-03-28 Siemens Ag Freisprecheinrichtung für ein digitales Kommunikationsendgerät
US5715309A (en) * 1995-03-03 1998-02-03 Advanced Micro Devices, Inc. Conversion of compressed speech codes between attenuated and unattenuated formats
US5598466A (en) * 1995-08-28 1997-01-28 Intel Corporation Voice activity detector for half-duplex audio communication system
US6175634B1 (en) 1995-08-28 2001-01-16 Intel Corporation Adaptive noise reduction technique for multi-point communication system
US5844994A (en) * 1995-08-28 1998-12-01 Intel Corporation Automatic microphone calibration for video teleconferencing
US5734713A (en) * 1996-01-30 1998-03-31 Jabra Corporation Method and system for remote telephone calibration
US6453042B1 (en) 1996-01-30 2002-09-17 Jabra Corporation Method and system for remote telephone calibration
US5892823A (en) * 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
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
US6990190B2 (en) * 1997-11-17 2006-01-24 Gn Jabra Corporation Method and system for remote telephone calibration
US6662027B2 (en) * 2001-03-16 2003-12-09 Motorola, Inc. Method of arbitrating speakerphone operation in a portable communication device for eliminating false arbitration due to echo
WO2002098113A1 (en) * 2001-05-31 2002-12-05 Danacom A/S Self-configuring communication device interface unit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637954A (en) * 1969-05-22 1972-01-25 Bell Telephone Labor Inc Method and apparatus for dynamic testing of echo suppressors in telephone trunk systems
DE2853167C2 (de) * 1978-12-08 1980-10-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Teilnehmerschaltung
US4368362A (en) * 1980-07-28 1983-01-11 Bell Telephone Laboratories, Incorporated Automatic telephone loaded/nonloaded facility type identification circuit
US4414432A (en) * 1981-09-21 1983-11-08 Zenith Radio Corporation Pseudo-full duplex television/telephone loudspeaker system
JPS5890832A (ja) * 1981-11-26 1983-05-30 Toshiba Corp 反響打消し装置
JPS60117928A (ja) * 1983-11-30 1985-06-25 Fujitsu Ltd エコ−キヤンセラの収束方式
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
US4608462A (en) * 1984-06-29 1986-08-26 International Standard Electric Corporation Telephone instrument circuit
JPS6379449A (ja) * 1986-09-24 1988-04-09 Nec Corp 拡声機能付き音響エコ−キヤンセラ装置

Also Published As

Publication number Publication date
DE68916221T2 (de) 1995-02-02
US4887288A (en) 1989-12-12
AU4721589A (en) 1990-07-05
AU615819B2 (en) 1991-10-10
CA2004169C (en) 1994-07-19
EP0376589A3 (en) 1990-12-05
EP0376589B1 (de) 1994-06-15
EP0376589A2 (de) 1990-07-04
CA2004169A1 (en) 1990-06-28
ES2055799T3 (es) 1994-09-01
HK148694A (en) 1995-01-06
JPH0654927B2 (ja) 1994-07-20
JPH02260855A (ja) 1990-10-23
KR900011170A (ko) 1990-07-11
KR970010838B1 (ko) 1997-07-01

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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