DE69324806D1 - Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation - Google Patents

Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation

Info

Publication number
DE69324806D1
DE69324806D1 DE69324806T DE69324806T DE69324806D1 DE 69324806 D1 DE69324806 D1 DE 69324806D1 DE 69324806 T DE69324806 T DE 69324806T DE 69324806 T DE69324806 T DE 69324806T DE 69324806 D1 DE69324806 D1 DE 69324806D1
Authority
DE
Germany
Prior art keywords
transfer function
loop
echocompensation
filter
echo
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
DE69324806T
Other languages
English (en)
Other versions
DE69324806T2 (de
Inventor
Bengt Loefmark
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of DE69324806D1 publication Critical patent/DE69324806D1/de
Publication of DE69324806T2 publication Critical patent/DE69324806T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
  • Vehicle Body Suspensions (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Vibration Prevention Devices (AREA)
  • Gyroscopes (AREA)
  • Filters That Use Time-Delay Elements (AREA)
DE69324806T 1992-04-09 1993-03-11 Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation Expired - Fee Related DE69324806T2 (de)

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 (2)

Publication Number Publication Date
DE69324806D1 true DE69324806D1 (de) 1999-06-10
DE69324806T2 DE69324806T2 (de) 1999-10-07

Family

ID=20385920

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69324806T Expired - Fee Related DE69324806T2 (de) 1992-04-09 1993-03-11 Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation

Country Status (16)

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

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
US7215765B2 (en) * 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
EP1668854A1 (de) * 2003-09-23 2006-06-14 Koninklijke Philips Electronics N.V. Adaptives filter
DE502006008685D1 (de) * 2006-11-17 2011-02-17 Siemens Ag 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
DK0635178T3 (da) 1999-11-15
KR950701165A (ko) 1995-02-20
DE69324806T2 (de) 1999-10-07
GR3030748T3 (en) 1999-11-30
NO943781L (no) 1994-10-07
SE470119B (sv) 1993-11-08
FI944726A0 (fi) 1994-10-07
FI944726A (fi) 1994-10-07
US5446787A (en) 1995-08-29
WO1993021695A1 (en) 1993-10-28
ES2132229T3 (es) 1999-08-16
AU668558B2 (en) 1996-05-09
NO306919B1 (no) 2000-01-10
BR9306205A (pt) 1998-06-23
CA2131890A1 (en) 1993-10-28
SE9201145L (sv) 1993-10-10
ATE179849T1 (de) 1999-05-15
SE9201145D0 (sv) 1992-04-09
AU3963893A (en) 1993-11-18
EP0635178B1 (de) 1999-05-06
JPH07505986A (ja) 1995-06-29
EP0635178A1 (de) 1995-01-25
KR100271343B1 (ko) 2000-11-01
NO943781D0 (no) 1994-10-07

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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