TR200001967T2 - Bir bağlantının iki ucunda da oluşan ekonun kontrol edilmesi için yöntem ve ekipman. - Google Patents

Bir bağlantının iki ucunda da oluşan ekonun kontrol edilmesi için yöntem ve ekipman.

Info

Publication number
TR200001967T2
TR200001967T2 TR2000/01967T TR200001967T TR200001967T2 TR 200001967 T2 TR200001967 T2 TR 200001967T2 TR 2000/01967 T TR2000/01967 T TR 2000/01967T TR 200001967 T TR200001967 T TR 200001967T TR 200001967 T2 TR200001967 T2 TR 200001967T2
Authority
TR
Turkey
Prior art keywords
cancel
echo
connection
mobile phone
controlling
Prior art date
Application number
TR2000/01967T
Other languages
English (en)
Inventor
Eriksson Gunnar
Svensson Tommy
Trump T�Nu
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Publication of TR200001967T2 publication Critical patent/TR200001967T2/tr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

Tek bir iki-uçlu eko iptalcisi (102) verilmekte olup bu iptalci eko yolunun impuls cevabini modellemek ve baglantinin PSTN tarafindan çikan ekoyu iptal etmek için bir adaptif FIR filtresi (112) ve baglantinin mobil telefon tarafindan çikan ekoyu iptal etmek için giris sinyal seviyeleri ile kontrol edilen bir lineer olmayan islemci (114) kullanir. Lineer islem fonksiyonu mobil telefon tarafindaki ekolari iptal etmek için kullanilmadigindan baglantinin her iki yanindaki ekolari tahmin ve iptal etmek için yönlendirilen algoritmalar tüm avantajlari ile birlikte tek bir DSP içinde çalistirilir.
TR2000/01967T 1997-03-26 1998-03-24 Bir bağlantının iki ucunda da oluşan ekonun kontrol edilmesi için yöntem ve ekipman. TR200001967T2 (tr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/825,017 US6064873A (en) 1997-03-26 1997-03-26 Method and apparatus for controlling echo on both sides of a connection

Publications (1)

Publication Number Publication Date
TR200001967T2 true TR200001967T2 (tr) 2000-09-21

Family

ID=25242913

Family Applications (2)

Application Number Title Priority Date Filing Date
TR2000/01967T TR200001967T2 (tr) 1997-03-26 1998-03-24 Bir bağlantının iki ucunda da oluşan ekonun kontrol edilmesi için yöntem ve ekipman.
TR1999/02332T TR199902332T2 (tr) 1997-03-26 1998-03-24 Bir baglantinin iki ucunda da olusan ekonun kontrol edilmesi için yöntem ve ekipman

Family Applications After (1)

Application Number Title Priority Date Filing Date
TR1999/02332T TR199902332T2 (tr) 1997-03-26 1998-03-24 Bir baglantinin iki ucunda da olusan ekonun kontrol edilmesi için yöntem ve ekipman

Country Status (10)

Country Link
US (1) US6064873A (tr)
EP (1) EP0972355B1 (tr)
JP (1) JP2001521705A (tr)
CN (1) CN1192510C (tr)
AU (1) AU6754398A (tr)
DE (1) DE69842257D1 (tr)
MY (1) MY123985A (tr)
PL (2) PL187647B1 (tr)
TR (2) TR200001967T2 (tr)
WO (1) WO1998043368A2 (tr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI105864B (fi) * 1997-04-18 2000-10-13 Nokia Networks Oy Kaiunpoistomekanismi
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
US6487177B1 (en) * 1998-06-12 2002-11-26 Nortel Networks Limited Method and system for enhancing communications efficiency in data communications networks
US6678254B1 (en) 1999-05-03 2004-01-13 Nortel Networks Limited Method and communication device for optimizing echo cancellation
US6925174B2 (en) * 1999-12-09 2005-08-02 Broadcom Corporation Interaction between echo canceller and packet voice processing
US7920697B2 (en) * 1999-12-09 2011-04-05 Broadcom Corp. Interaction between echo canceller and packet voice processing
US20150117441A1 (en) * 2013-10-28 2015-04-30 Michael Pascazi System and method for cell phone to cell phone signal transmission via the internet
JP2002050986A (ja) * 2000-08-03 2002-02-15 Matsushita Electric Ind Co Ltd エコーキャンセル方法及びエコーキャンセル装置
US6766020B1 (en) 2001-02-23 2004-07-20 3Com Corporation System and method for comfort noise generation
US7251213B2 (en) * 2002-09-17 2007-07-31 At&T Corp. Method for remote measurement of echo path delay
US7536007B2 (en) * 2004-12-30 2009-05-19 Alcatel Lucent Echo cancellation using adaptive IIR and FIR filters
US7596220B2 (en) * 2004-12-30 2009-09-29 Alcatel Lucent Echo cancellation using adaptive IIR and FIR filters
CN1937657B (zh) * 2005-09-20 2011-04-20 华为技术有限公司 对线性回波进行控制的方法
US8078659B2 (en) * 2005-10-31 2011-12-13 Telefonaktiebolaget L M Ericsson (Publ) Reduction of digital filter delay
US8873742B1 (en) * 2006-03-15 2014-10-28 Sprint Communications Company L.P. Echo canceller auditor
WO2013121306A2 (en) 2012-02-14 2013-08-22 Koninklijke Philips N.V. Audio signal processing in a communication system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
JPH0650829B2 (ja) * 1986-09-16 1994-06-29 日本電気株式会社 エコ−キヤンセラ方式モデム
JPH03159423A (ja) * 1989-11-17 1991-07-09 Fujitsu Ltd エコーキャンセラにおけるダブルトーク検出方式
JP2518433B2 (ja) * 1990-01-24 1996-07-24 日本電気株式会社 ダブルト―ク検出回路
US5157653A (en) * 1990-08-03 1992-10-20 Coherent Communications Systems Corp. Residual echo elimination with proportionate noise injection
GB2256351B (en) * 1991-05-25 1995-07-05 Motorola Inc Enhancement of echo return loss
US5477535A (en) * 1991-11-04 1995-12-19 Nokia Telecommunications Oy Method of preventing a divergence of an adaptive echo canceller in a noisy signal environment
US5295136A (en) * 1992-04-13 1994-03-15 Motorola, Inc. Method of performing convergence in a, least mean square, adaptive filter, echo canceller
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
JP2508574B2 (ja) * 1992-11-10 1996-06-19 日本電気株式会社 多チャンネルエコ―除去装置
JPH07288493A (ja) * 1994-04-18 1995-10-31 Fujitsu Ltd ダブルトーク検出装置
US5587998A (en) * 1995-03-03 1996-12-24 At&T Method and apparatus for reducing residual far-end echo in voice communication networks
US5610909A (en) * 1995-05-31 1997-03-11 Lucent Technologies Inc. Multistage echo canceler including time variation compensation

Also Published As

Publication number Publication date
CN1257624A (zh) 2000-06-21
CN1192510C (zh) 2005-03-09
EP0972355A2 (en) 2000-01-19
MY123985A (en) 2006-06-30
DE69842257D1 (de) 2011-06-16
TR199902332T2 (tr) 2000-03-21
EP0972355B1 (en) 2011-05-04
JP2001521705A (ja) 2001-11-06
US6064873A (en) 2000-05-16
WO1998043368A3 (en) 1999-01-21
WO1998043368A2 (en) 1998-10-01
AU6754398A (en) 1998-10-20
PL187658B1 (pl) 2004-08-31
PL335881A1 (en) 2000-05-22
PL187647B1 (pl) 2004-08-31

Similar Documents

Publication Publication Date Title
TR200001967T2 (tr) Bir bağlantının iki ucunda da oluşan ekonun kontrol edilmesi için yöntem ve ekipman.
EP1236376B1 (en) Noise suppression system with dual microphone echo cancellation
FI962562A (fi) Kaikusalpa ja kaiunpoistajan epälineaarinen prosessori
FI863169A0 (fi) Fullstaendigt dubbelriktad hoegtalartelefon foer radio- och kabeltelefonsystem.
ES462189A1 (es) Perfeccionamientos en dispositivos de anulacion del eco parasistemas sincronos por baudios de transmision de informaciondigital.
CA2174366A1 (en) Subband echo cancellation method using projection algorithm
CA2088684A1 (en) Residual echo elimination with proportionate noise injection
CA2171492A1 (en) Acoustic Echo Canceler
DE69110700D1 (de) Akustischer Teilband-Echokompensator.
CA2017898A1 (en) Echo canceler-suppressor speakerphone
GR3024103T3 (tr)
DE69636570D1 (de) Echokompensation und -unterdrückung
CA2051147A1 (en) Echo canceller using impulse response estimating method
SE9803636D0 (sv) Nonlinear processor for acoustic echo canceller
CA2162571A1 (en) Echo canceler and method for learning for the same
WO2005011234A3 (en) Echo cancellation filter
DE60017559D1 (de) Symmetrisch basierter teilbandechokompensator
KR950701165A (ko) 에코제거시 자기발진 방지방법(a method for avoiding self-oscillation in conjunction with echo cancellation)
KR960006346A (ko) 가입자와 통신하는 장치
CA2319639C (en) Locating network echos
SE9503545D0 (sv) Förafrande vid telefonsystem
JPS6221457B2 (tr)
JPH07303065A (ja) エコーキャンセラ
SE9704010D0 (sv) Improvements in, or relating to, near-echo suppression
JPH07303073A (ja) ノイズ低減回路およびこの回路を用いたエコーキャンセラ