DE69532394D1 - Verfahren und Vorrichtung zur Echokompensation mit Anwendung der "fast projection scheme" - Google Patents

Verfahren und Vorrichtung zur Echokompensation mit Anwendung der "fast projection scheme"

Info

Publication number
DE69532394D1
DE69532394D1 DE69532394T DE69532394T DE69532394D1 DE 69532394 D1 DE69532394 D1 DE 69532394D1 DE 69532394 T DE69532394 T DE 69532394T DE 69532394 T DE69532394 T DE 69532394T DE 69532394 D1 DE69532394 D1 DE 69532394D1
Authority
DE
Germany
Prior art keywords
echo cancellation
projection scheme
fast projection
fast
scheme
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
DE69532394T
Other languages
English (en)
Other versions
DE69532394T2 (de
Inventor
Yoichi Haneda
Shoji Makino
Masashi Tanaka
Yutaka Kaneda
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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
Priority claimed from JP01674594A external-priority patent/JP3268572B2/ja
Priority claimed from JP01744594A external-priority patent/JP3248551B2/ja
Priority claimed from JP01740994A external-priority patent/JP3248550B2/ja
Priority claimed from JP10241894A external-priority patent/JP3147207B2/ja
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of DE69532394D1 publication Critical patent/DE69532394D1/de
Application granted granted Critical
Publication of DE69532394T2 publication Critical patent/DE69532394T2/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
    • H04M9/082—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)
DE69532394T 1994-02-10 1995-02-08 Verfahren und Vorrichtung zur Echokompensation mit Anwendung der "fast projection scheme" Expired - Lifetime DE69532394T2 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP01674594A JP3268572B2 (ja) 1994-02-10 1994-02-10 反響消去装置及び方法
JP1674594 1994-02-10
JP01744594A JP3248551B2 (ja) 1994-02-14 1994-02-14 反響消去装置
JP1744594 1994-02-14
JP01740994A JP3248550B2 (ja) 1994-02-14 1994-02-14 反響消去装置
JP1740994 1994-02-14
JP10241894A JP3147207B2 (ja) 1994-05-17 1994-05-17 適応的未知系出力推定方法
JP10241894 1994-05-17

Publications (2)

Publication Number Publication Date
DE69532394D1 true DE69532394D1 (de) 2004-02-12
DE69532394T2 DE69532394T2 (de) 2004-11-04

Family

ID=27456636

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69532394T Expired - Lifetime DE69532394T2 (de) 1994-02-10 1995-02-08 Verfahren und Vorrichtung zur Echokompensation mit Anwendung der "fast projection scheme"

Country Status (4)

Country Link
US (1) US5539731A (de)
EP (1) EP0667700B1 (de)
CA (1) CA2142147C (de)
DE (1) DE69532394T2 (de)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0766446B1 (de) * 1995-09-26 2003-06-11 Nippon Telegraph And Telephone Corporation Verfahren und Einrichtung zur mehrkanaligen Kompensation eines akustischen Echos
US5815496A (en) * 1995-09-29 1998-09-29 Lucent Technologies Inc. Cascade echo canceler arrangement
US5812537A (en) * 1995-09-29 1998-09-22 Paradyne Corporation Echo canceling method and apparatus for data over cellular
US5825753A (en) * 1995-09-29 1998-10-20 Paradyne Corporation Echo canceler gain tracker for cellular modems
JP3199155B2 (ja) * 1995-10-18 2001-08-13 日本電信電話株式会社 反響消去装置
JP2842345B2 (ja) * 1995-11-29 1999-01-06 日本電気株式会社 エコーキャンセラ
US5774562A (en) * 1996-03-25 1998-06-30 Nippon Telegraph And Telephone Corp. Method and apparatus for dereverberation
CN1111973C (zh) * 1996-08-01 2003-06-18 北方电讯网络有限公司 改进了的数字蜂窝应用的回波消除器
FR2758677B1 (fr) * 1997-01-21 1999-04-02 Matra Communication Procede d'annulation d'echo et annuleur d'echo mettant en oeuvre un tel procede
GB2330744B (en) * 1997-10-24 2002-05-29 Mitel Corp Howling controller
DE19861341B4 (de) * 1997-10-24 2006-06-14 Zarlink Semiconductor Inc., City Of Ottawa Vorrichtung zur Vermeidung einer akustischen Rückkopplung
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
US6178162B1 (en) * 1997-12-19 2001-01-23 Nortel Networks Corporation Method and apparatus for inhibiting echo in a channel of a communication system
JP3211884B2 (ja) * 1998-08-14 2001-09-25 日本電気株式会社 音響エコーキャンセラ
KR100307662B1 (ko) * 1998-10-13 2001-12-01 윤종용 가변적인수행속도를지원하는에코제거장치및방법
JP2000252881A (ja) 1999-02-25 2000-09-14 Mitsubishi Electric Corp ダブルトーク検知装置並びにエコーキャンセラ装置およびエコーサプレッサー装置
WO2000072567A1 (en) * 1999-05-25 2000-11-30 British Telecommunications Public Limited Company Acoustic echo cancellation
US6959167B1 (en) * 2000-08-11 2005-10-25 Scansoft, Inc. Noise-level adaptive residual echo suppressor
DE10043064B4 (de) * 2000-09-01 2004-07-08 Dietmar Dr. Ruwisch Verfahren und Vorrichtung zur Elimination von Lautsprecherinterferenzen aus Mikrofonsignalen
US6963760B2 (en) * 2001-10-01 2005-11-08 General Motors Corporation Method and apparatus for generating DTMF tones using voice-recognition commands during hands-free communication in a vehicle
US6895086B2 (en) 2001-11-13 2005-05-17 Inmate Telephone, Inc. 3-Way call detection system and method
US7123651B2 (en) * 2002-07-31 2006-10-17 Lsi Logic Corporation Adaptable hybrid and selection method for ADSL modem data rate improvement
CA2534767A1 (en) * 2003-08-05 2005-03-17 Inmate Telephone, Inc. Three-way call detection using steganography
US7817797B2 (en) * 2006-06-07 2010-10-19 Mitel Networks Corporation Method and apparatus for detecting echo path changes in an acoustic echo canceller
EP1950739B1 (de) * 2007-01-23 2011-09-14 Siemens Aktiengesellschaft Österreich Verfahren zur Identifikation von Signalen gleichen Ursprungs
US20080201158A1 (en) 2007-02-15 2008-08-21 Johnson Mark D System and method for visitation management in a controlled-access environment
US8542802B2 (en) * 2007-02-15 2013-09-24 Global Tel*Link Corporation System and method for three-way call detection
DE112007003625T5 (de) * 2007-08-24 2010-07-15 Fujitsu Ltd., Kawasaki Echounterdrückungsvorrichtung, echounterdrückungssystem, Echounterdrückungsverfahren und Computerprogramm
US8094809B2 (en) * 2008-05-12 2012-01-10 Visteon Global Technologies, Inc. Frame-based level feedback calibration system for sample-based predictive clipping
EP2330752B1 (de) * 2008-09-24 2013-03-20 Mitsubishi Electric Corporation Echolöscheinrichtung
US8630726B2 (en) * 2009-02-12 2014-01-14 Value-Added Communications, Inc. System and method for detecting three-way call circumvention attempts
US9225838B2 (en) 2009-02-12 2015-12-29 Value-Added Communications, Inc. System and method for detecting three-way call circumvention attempts
JP5604275B2 (ja) * 2010-12-02 2014-10-08 富士通テン株式会社 相関低減方法、音声信号変換装置および音響再生装置
US9613634B2 (en) * 2014-06-19 2017-04-04 Yang Gao Control of acoustic echo canceller adaptive filter for speech enhancement
US10572961B2 (en) 2016-03-15 2020-02-25 Global Tel*Link Corporation Detection and prevention of inmate to inmate message relay
US9609121B1 (en) 2016-04-07 2017-03-28 Global Tel*Link Corporation System and method for third party monitoring of voice and video calls
US10027797B1 (en) 2017-05-10 2018-07-17 Global Tel*Link Corporation Alarm control for inmate call monitoring
US10225396B2 (en) 2017-05-18 2019-03-05 Global Tel*Link Corporation Third party monitoring of a activity within a monitoring platform
US10860786B2 (en) 2017-06-01 2020-12-08 Global Tel*Link Corporation System and method for analyzing and investigating communication data from a controlled environment
US9930088B1 (en) 2017-06-22 2018-03-27 Global Tel*Link Corporation Utilizing VoIP codec negotiation during a controlled environment call

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
EP0530423B1 (de) * 1991-09-06 1996-12-11 International Business Machines Corporation Verfahren zur adaptiven Echokompensation und Einrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
EP0667700A3 (de) 1996-07-31
CA2142147A1 (en) 1995-08-11
DE69532394T2 (de) 2004-11-04
EP0667700B1 (de) 2004-01-07
EP0667700A2 (de) 1995-08-16
US5539731A (en) 1996-07-23
CA2142147C (en) 2000-12-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition