BR9306205A - Processo para evitar auto-oscilaçao em um enlace de quatro fios juntamente com cancelamento de eco efetuado com o auxílio de um filtro - Google Patents

Processo para evitar auto-oscilaçao em um enlace de quatro fios juntamente com cancelamento de eco efetuado com o auxílio de um filtro

Info

Publication number
BR9306205A
BR9306205A BR9306205A BR9306205A BR9306205A BR 9306205 A BR9306205 A BR 9306205A BR 9306205 A BR9306205 A BR 9306205A BR 9306205 A BR9306205 A BR 9306205A BR 9306205 A BR9306205 A BR 9306205A
Authority
BR
Brazil
Prior art keywords
filter
oscillation
aid
transfer function
echo cancellation
Prior art date
Application number
BR9306205A
Other languages
English (en)
Inventor
Bengt Gustav Lofmark
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
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR9306205A publication Critical patent/BR9306205A/pt

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Pressure Sensors (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Vibration Prevention Devices (AREA)
  • Vehicle Body Suspensions (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Gyroscopes (AREA)
  • Filters That Use Time-Delay Elements (AREA)
BR9306205A 1992-04-09 1993-03-11 Processo para evitar auto-oscilaçao em um enlace de quatro fios juntamente com cancelamento de eco efetuado com o auxílio de um filtro BR9306205A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9201145A SE470119B (sv) 1992-04-09 1992-04-09 Metod för att undvika självsvängning i en fyrtrådsslinga i samband med ekosläckning
PCT/SE1993/000218 WO1993021695A1 (en) 1992-04-09 1993-03-11 A method for avoiding self-oscillation in conjunction with echo cancellation

Publications (1)

Publication Number Publication Date
BR9306205A true BR9306205A (pt) 1998-06-23

Family

ID=20385920

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9306205A BR9306205A (pt) 1992-04-09 1993-03-11 Processo para evitar auto-oscilaçao em um enlace de quatro fios juntamente com cancelamento de eco efetuado com o auxílio de um filtro

Country Status (16)

Country Link
US (1) US5446787A (pt)
EP (1) EP0635178B1 (pt)
JP (1) JPH07505986A (pt)
KR (1) KR100271343B1 (pt)
AT (1) ATE179849T1 (pt)
AU (1) AU668558B2 (pt)
BR (1) BR9306205A (pt)
CA (1) CA2131890A1 (pt)
DE (1) DE69324806T2 (pt)
DK (1) DK0635178T3 (pt)
ES (1) ES2132229T3 (pt)
FI (1) FI944726A (pt)
GR (1) GR3030748T3 (pt)
NO (1) NO306919B1 (pt)
SE (1) SE470119B (pt)
WO (1) WO1993021695A1 (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5612996A (en) * 1995-09-21 1997-03-18 Rockwell International Corporation Loop gain processing system for speakerphone applications
US6243366B1 (en) * 1997-06-20 2001-06-05 At&T Corp. Method and apparatus for providing interactive two-way communications using a single one-way channel in satellite systems
KR100477638B1 (ko) * 2001-09-11 2005-03-23 삼성전자주식회사 ２ｄ／３ｄ 겸용 디스플레이
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US7215765B2 (en) * 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
JP4425919B2 (ja) * 2003-09-23 2010-03-03 エヌエックスピー ビー ヴィ 適応フィルタ
WO2008058493A1 (de) * 2006-11-17 2008-05-22 Siemens Aktiengesellschaft Verfahren und anordnung zur steuerung von adaptiven filtern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS583430A (ja) * 1981-06-30 1983-01-10 Nec Corp まわり込信号抑圧装置
US4712235A (en) * 1984-11-19 1987-12-08 International Business Machines Corporation Method and apparatus for improved control and time sharing of an echo canceller
US4811261A (en) * 1985-03-04 1989-03-07 Oki Electric Industry Co., Ltd. Adaptive digital filter for determining a transfer equation of an unknown system
US4894820A (en) * 1987-03-24 1990-01-16 Oki Electric Industry Co., Ltd. Double-talk detection in an echo canceller
US5111481A (en) * 1989-11-17 1992-05-05 Nynex Corporation Dual mode LMS channel equalizer

Also Published As

Publication number Publication date
KR100271343B1 (ko) 2000-11-01
NO943781D0 (no) 1994-10-07
US5446787A (en) 1995-08-29
FI944726A0 (fi) 1994-10-07
JPH07505986A (ja) 1995-06-29
DE69324806D1 (de) 1999-06-10
GR3030748T3 (en) 1999-11-30
ES2132229T3 (es) 1999-08-16
ATE179849T1 (de) 1999-05-15
DE69324806T2 (de) 1999-10-07
CA2131890A1 (en) 1993-10-28
FI944726A (fi) 1994-10-07
EP0635178B1 (en) 1999-05-06
NO306919B1 (no) 2000-01-10
AU3963893A (en) 1993-11-18
KR950701165A (ko) 1995-02-20
EP0635178A1 (en) 1995-01-25
WO1993021695A1 (en) 1993-10-28
DK0635178T3 (da) 1999-11-15
AU668558B2 (en) 1996-05-09
NO943781L (no) 1994-10-07
SE470119B (sv) 1993-11-08
SE9201145L (sv) 1993-10-10
SE9201145D0 (sv) 1992-04-09

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