DE69728150D1 - Dynamische optimierung für mikrofonverstärkung in einer freisprecheinrichtung - Google Patents

Dynamische optimierung für mikrofonverstärkung in einer freisprecheinrichtung

Info

Publication number
DE69728150D1
DE69728150D1 DE69728150T DE69728150T DE69728150D1 DE 69728150 D1 DE69728150 D1 DE 69728150D1 DE 69728150 T DE69728150 T DE 69728150T DE 69728150 T DE69728150 T DE 69728150T DE 69728150 D1 DE69728150 D1 DE 69728150D1
Authority
DE
Germany
Prior art keywords
hands
dynamic optimization
free unit
microphone amplification
microphone
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
DE69728150T
Other languages
English (en)
Other versions
DE69728150T2 (de
Inventor
Scott Mcclennon
Heping Ding
Farra David Dal
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.)
Nortel Networks Ltd
Original Assignee
Nortel Networks Ltd
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 Nortel Networks Ltd filed Critical Nortel Networks Ltd
Publication of DE69728150D1 publication Critical patent/DE69728150D1/de
Application granted granted Critical
Publication of DE69728150T2 publication Critical patent/DE69728150T2/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)
  • Telephone Function (AREA)
  • Circuit For Audible Band Transducer (AREA)
DE69728150T 1996-08-08 1997-08-08 Dynamische optimierung für mikrofonverstärkung in einer freisprecheinrichtung Expired - Fee Related DE69728150T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/694,124 US5796818A (en) 1996-08-08 1996-08-08 Dynamic optimization of handsfree microphone gain
US694124 1996-08-08
PCT/CA1997/000579 WO1998007263A2 (en) 1996-08-08 1997-08-08 Dynamic optimization of handsfree microphone gain

Publications (2)

Publication Number Publication Date
DE69728150D1 true DE69728150D1 (de) 2004-04-22
DE69728150T2 DE69728150T2 (de) 2004-07-29

Family

ID=24787504

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69728150T Expired - Fee Related DE69728150T2 (de) 1996-08-08 1997-08-08 Dynamische optimierung für mikrofonverstärkung in einer freisprecheinrichtung

Country Status (6)

Country Link
US (1) US5796818A (de)
EP (1) EP0917796B1 (de)
AU (1) AU3935597A (de)
CA (1) CA2263540C (de)
DE (1) DE69728150T2 (de)
WO (1) WO1998007263A2 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731123B1 (fr) * 1995-02-27 1997-05-09 Prescom Sarl Correction de gain de haut-parleur pour un terminal telephonique mains-libres
US6009165A (en) * 1997-08-22 1999-12-28 Casio Phonemate, Inc. Full duplex speakerphone system
KR100283170B1 (ko) 1998-11-04 2001-03-02 윤종용 반향제거 장치 및 방법
ATE512506T1 (de) * 2000-10-05 2011-06-15 Alcatel Lucent Verstärkervorrichtung
KR100360664B1 (ko) * 2000-11-22 2002-11-13 엘지이노텍 주식회사 헬멧 마운티드 사이트의 음성입출력 시스템
JP3862545B2 (ja) * 2001-10-22 2006-12-27 沖電気工業株式会社 エコーキャンセラ
US9100490B2 (en) 2006-01-03 2015-08-04 Vtech Telecommunications Limited System and method for adjusting hands-free phone
US8374851B2 (en) * 2007-07-30 2013-02-12 Texas Instruments Incorporated Voice activity detector and method
US9691413B2 (en) * 2015-10-06 2017-06-27 Microsoft Technology Licensing, Llc Identifying sound from a source of interest based on multiple audio feeds

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600815A (en) * 1982-07-30 1986-07-15 Communications Satellite Corporation Automatic gain control for echo cancellers and similar adaptive systems
US4965822A (en) * 1989-04-10 1990-10-23 Videotelecom Corp. Full duplex speakerphone
FR2651077B1 (fr) * 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
NL9002790A (nl) * 1990-12-18 1992-07-16 Philips Nv Echocompensator met verbeterde dubbelspraak detectie.
FR2676881A1 (fr) * 1991-05-21 1992-11-27 Telecommunications Sa Procede pour optimiser la qualite des communications telephoniques.
CA2052351C (en) * 1991-09-27 2000-05-23 Gordon J. Reesor Telephone handsfree algorithm
US5271057A (en) * 1991-10-09 1993-12-14 Bell Communications Research, Inc. Audio processing system for teleconferencing system
JPH06216811A (ja) * 1993-01-20 1994-08-05 Toshiba Corp エコーキャンセラを備えた音声通信装置
US5600714A (en) * 1994-01-14 1997-02-04 Sound Control Technologies, Inc. Conference telephone using dynamic modeled line hybrid
JPH07264279A (ja) * 1994-03-18 1995-10-13 Nec Corp エコーキャンセラ装置
DE4445877A1 (de) * 1994-12-22 1996-06-27 Philips Patentverwaltung Verfahren und Anordnung zur Echokompensation
US5646990A (en) * 1995-09-21 1997-07-08 Rockwell International Corporation Efficient speakerphone anti-howling system
US5612996A (en) * 1995-09-21 1997-03-18 Rockwell International Corporation Loop gain processing system for speakerphone applications

Also Published As

Publication number Publication date
WO1998007263A2 (en) 1998-02-19
EP0917796B1 (de) 2004-03-17
CA2263540C (en) 2003-06-03
AU3935597A (en) 1998-03-06
CA2263540A1 (en) 1998-02-19
EP0917796A2 (de) 1999-05-26
DE69728150T2 (de) 2004-07-29
US5796818A (en) 1998-08-18
WO1998007263A3 (en) 1998-06-18

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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