NO982596L - FremgangsmÕte og anordning ved eliminering av akustisk ekko i telekommunikasjonssystem - Google Patents

FremgangsmÕte og anordning ved eliminering av akustisk ekko i telekommunikasjonssystem

Info

Publication number
NO982596L
NO982596L NO982596A NO982596A NO982596L NO 982596 L NO982596 L NO 982596L NO 982596 A NO982596 A NO 982596A NO 982596 A NO982596 A NO 982596A NO 982596 L NO982596 L NO 982596L
Authority
NO
Norway
Prior art keywords
acoustic echo
telecommunication system
eliminating acoustic
aec
telephone
Prior art date
Application number
NO982596A
Other languages
English (en)
Other versions
NO982596D0 (no
Inventor
Sune Gustafsson
John-Erik Eriksson
Original Assignee
Ericsson Telefon Ab L M
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 SE9504369A external-priority patent/SE506152C2/sv
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of NO982596D0 publication Critical patent/NO982596D0/no
Publication of NO982596L publication Critical patent/NO982596L/no

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)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Paper (AREA)

Abstract

Nærværende oppfinnelse gjelder en metode og en an- ordning for å redusere akustisk ekko i forbindelse med en telefonsamtale der minst en av partene bruker et handfritt telefonapparat (10). Oppfinnelsens idé er i hovedsak å implementere en anordning (Acoustic Echo Control - AEC) (14) for å styre akustisk ekko i en digital telefonsentral (12) i et telekommunika- sjonssystem. AEC-funksjonen kan da nås fra alle te- lefonapparater som er tilknyttet den digitale sen- tralen.
NO982596A 1995-12-06 1998-06-05 FremgangsmÕte og anordning ved eliminering av akustisk ekko i telekommunikasjonssystem NO982596L (no)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9504369A SE506152C2 (sv) 1995-12-06 1995-12-06 Förfarande och anordning för eliminering av akustiska ekon i telekommunikationssystem
US891495P 1995-12-20 1995-12-20
PCT/SE1996/001612 WO1997021280A1 (en) 1995-12-06 1996-12-06 A method and arrangement for elimination of acoustic echoes in a telecommunication system

Publications (2)

Publication Number Publication Date
NO982596D0 NO982596D0 (no) 1998-06-05
NO982596L true NO982596L (no) 1998-08-05

Family

ID=26662445

Family Applications (1)

Application Number Title Priority Date Filing Date
NO982596A NO982596L (no) 1995-12-06 1998-06-05 FremgangsmÕte og anordning ved eliminering av akustisk ekko i telekommunikasjonssystem

Country Status (6)

Country Link
US (1) US5923749A (no)
EP (1) EP0865688A1 (no)
CN (1) CN1208518A (no)
AU (1) AU712952B2 (no)
NO (1) NO982596L (no)
WO (1) WO1997021280A1 (no)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6687373B1 (en) 1999-08-24 2004-02-03 Nortel Networks Limited Heusristics for optimum beta factor and filter order determination in echo canceler systems
US6549617B1 (en) 2000-01-19 2003-04-15 International Controllers, Inc. Telephone switch with delayed mail control system
US7796544B2 (en) * 2002-06-07 2010-09-14 Tokyo Electron Limited Method and system for providing an analog front end for multiline transmission in communication systems
CN100557994C (zh) * 2005-09-14 2009-11-04 华为技术有限公司 交换机中实现回声抵消的装置和方法
US8295475B2 (en) * 2006-01-13 2012-10-23 Microsoft Corporation Selective glitch detection, clock drift compensation, and anti-clipping in audio echo cancellation
US7773743B2 (en) * 2006-04-28 2010-08-10 Microsoft Corporation Integration of a microphone array with acoustic echo cancellation and residual echo suppression
US7831035B2 (en) * 2006-04-28 2010-11-09 Microsoft Corporation Integration of a microphone array with acoustic echo cancellation and center clipping
US8380253B2 (en) 2008-02-15 2013-02-19 Microsoft Corporation Voice switching for voice communication on computers
US8369251B2 (en) * 2008-06-20 2013-02-05 Microsoft Corporation Timestamp quality assessment for assuring acoustic echo canceller operability
CN107910014B (zh) * 2017-11-23 2021-11-09 苏州科达科技股份有限公司 回声消除的测试方法、装置及测试设备

Family Cites Families (26)

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Publication number Priority date Publication date Assignee Title
US3769466A (en) * 1970-10-14 1973-10-30 Siemens Ag Telephone transmission system with echo suppressors
BR7908973A (pt) * 1979-05-11 1981-04-14 Toa Electric Co Ltd Sistema de contole de chaveamento de voz
US4577310A (en) * 1984-05-16 1986-03-18 Tie/Communications, Inc. Station interface for digital electronic telephone switching system having centralized digital audio processor
US4726062A (en) * 1985-12-11 1988-02-16 Harris Corporation Duplex hands-free communications circuit
US4845746A (en) * 1987-06-23 1989-07-04 Rockwell International Corporation Echo canceller with relative feedback control
US5014306A (en) * 1988-11-14 1991-05-07 Transtream, Inc. Voice and data telephone communication system and method
FR2651077B1 (fr) * 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
JPH04207823A (ja) * 1990-11-30 1992-07-29 Toshiba Corp 無線通信システムの基地局装置
JPH04207825A (ja) * 1990-11-30 1992-07-29 Toshiba Corp 無線通信システムの基地局装置
US5195132B1 (en) * 1990-12-03 1996-03-19 At & T Bell Lab Telephone network speech signal enhancement
JPH04311197A (ja) * 1991-04-09 1992-11-02 Canon Inc 電話交換装置
JPH05292174A (ja) * 1992-04-10 1993-11-05 Toshiba Corp エコーキャンセラ
DE69123579T2 (de) * 1991-09-06 1997-06-12 Ibm Verfahren zur adaptiven Echokompensation und Einrichtung zur Durchführung des Verfahrens
FI89658C (fi) * 1991-11-04 1993-10-25 Nokia Telecommunications Oy Arrangemang foer styrning av en ekoslaeckare
FI915196A (fi) * 1991-11-04 1993-05-05 Nokia Telecommunications Oy Foerfarande foer konvergering av en ekoslaeckare i boerjan av ett samtal
US5327489A (en) * 1991-12-16 1994-07-05 At&T Bell Laboratories Method and apparatus for monitoring a network for customer signaling during the term of a call
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
KR960010891B1 (ko) * 1993-10-19 1996-08-10 재단법인 한국전자통신연구소 반향제거 기능의 장애발생시 통화유지가 가능한 통화경로 스위칭 제어장치 및 방법
JPH084243B2 (ja) * 1993-05-31 1996-01-17 日本電気株式会社 多チャンネルエコー除去方法および装置
US5475731A (en) * 1994-01-07 1995-12-12 Ericsson Inc. Echo-canceling system and method using echo estimate to modify error signal
US5473686A (en) * 1994-02-01 1995-12-05 Tandy Corporation Echo cancellation apparatus
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
US5550901A (en) * 1994-08-24 1996-08-27 Coherent Communications Systems Corp. Full-duplex adapter for PBX telephone system
JP3397269B2 (ja) * 1994-10-26 2003-04-14 日本電信電話株式会社 多チャネル反響消去方法
US5657384A (en) * 1995-03-10 1997-08-12 Tandy Corporation Full duplex speakerphone
US5666407A (en) * 1995-12-05 1997-09-09 Ncr Corporation Software-based bridging system for full duplex audio telephone conferencing

Also Published As

Publication number Publication date
AU1049097A (en) 1997-06-27
CN1208518A (zh) 1999-02-17
NO982596D0 (no) 1998-06-05
EP0865688A1 (en) 1998-09-23
AU712952B2 (en) 1999-11-18
US5923749A (en) 1999-07-13
WO1997021280A1 (en) 1997-06-12

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