SE470119B - Metod för att undvika självsvängning i en fyrtrådsslinga i samband med ekosläckning - Google Patents

Metod för att undvika självsvängning i en fyrtrådsslinga i samband med ekosläckning

Info

Publication number
SE470119B
SE470119B SE9201145A SE9201145A SE470119B SE 470119 B SE470119 B SE 470119B SE 9201145 A SE9201145 A SE 9201145A SE 9201145 A SE9201145 A SE 9201145A SE 470119 B SE470119 B SE 470119B
Authority
SE
Sweden
Prior art keywords
coefficients
transfer function
echo
filter
limiting
Prior art date
Application number
SE9201145A
Other languages
English (en)
Swedish (sv)
Other versions
SE9201145L (sv
SE9201145D0 (sv
Inventor
Bengt Gustav Loefmark
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
Priority to SE9201145A priority Critical patent/SE470119B/sv
Publication of SE9201145D0 publication Critical patent/SE9201145D0/xx
Priority to PCT/SE1993/000218 priority patent/WO1993021695A1/en
Priority to JP5518219A priority patent/JPH07505986A/ja
Priority to FI944726A priority patent/FI944726L/fi
Priority to ES93909104T priority patent/ES2132229T3/es
Priority to DK93909104T priority patent/DK0635178T3/da
Priority to CA002131890A priority patent/CA2131890A1/en
Priority to DE69324806T priority patent/DE69324806T2/de
Priority to KR1019940703593A priority patent/KR100271343B1/ko
Priority to EP93909104A priority patent/EP0635178B1/en
Priority to BR9306205A priority patent/BR9306205A/pt
Priority to AU39638/93A priority patent/AU668558B2/en
Priority to AT93909104T priority patent/ATE179849T1/de
Priority to US08/044,050 priority patent/US5446787A/en
Publication of SE9201145L publication Critical patent/SE9201145L/
Publication of SE470119B publication Critical patent/SE470119B/sv
Priority to NO943781A priority patent/NO306919B1/no
Priority to GR990401832T priority patent/GR3030748T3/el

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)
  • Filters That Use Time-Delay Elements (AREA)
  • Pressure Sensors (AREA)
  • Vibration Prevention Devices (AREA)
  • Vehicle Body Suspensions (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Gyroscopes (AREA)
SE9201145A 1992-04-09 1992-04-09 Metod för att undvika självsvängning i en fyrtrådsslinga i samband med ekosläckning SE470119B (sv)

Priority Applications (16)

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
AT93909104T ATE179849T1 (de) 1992-04-09 1993-03-11 Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation
KR1019940703593A KR100271343B1 (ko) 1992-04-09 1993-03-11 에코제거시 자기발진 방지방법
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
FI944726A FI944726L (fi) 1992-04-09 1993-03-11 Menetelmä itsevärähtelyn välttämistä varten kaiunpoiston yhteydessä
ES93909104T ES2132229T3 (es) 1992-04-09 1993-03-11 Procedimiento para evitar las auto-oscilaciones durante la eliminacion del eco.
DK93909104T DK0635178T3 (da) 1992-04-09 1993-03-11 Fremgangsmåde til undgåelse af selvsving i forbindelse med ekkoundertrykkelse
CA002131890A CA2131890A1 (en) 1992-04-09 1993-03-11 A method for avoiding self-oscillation in conjunction with echo cancellation
DE69324806T DE69324806T2 (de) 1992-04-09 1993-03-11 Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation
PCT/SE1993/000218 WO1993021695A1 (en) 1992-04-09 1993-03-11 A method for avoiding self-oscillation in conjunction with echo cancellation
EP93909104A EP0635178B1 (en) 1992-04-09 1993-03-11 A method for avoiding self-oscillation in conjunction with echo cancellation
JP5518219A JPH07505986A (ja) 1992-04-09 1993-03-11 エコー相殺に関連する自励発振を回避するための方法
AU39638/93A AU668558B2 (en) 1992-04-09 1993-03-11 A method for avoiding self-oscillation in conjunction with echo cancellation
US08/044,050 US5446787A (en) 1992-04-09 1993-04-08 Method for avoiding self-oscillation in conjunction with echo cancellation
NO943781A NO306919B1 (no) 1992-04-09 1994-10-07 Fremgangsmåte for å unngå egenoscillasjon i forbindelse med ekko-kansellering
GR990401832T GR3030748T3 (en) 1992-04-09 1999-07-13 A method for avoiding self-oscillation in conjunction with echo cancellation.

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
SE9201145D0 SE9201145D0 (sv) 1992-04-09
SE9201145L SE9201145L (sv) 1993-10-10
SE470119B true SE470119B (sv) 1993-11-08

Family

ID=20385920

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9201145A SE470119B (sv) 1992-04-09 1992-04-09 Metod för att undvika självsvängning i en fyrtrådsslinga i samband med ekosläckning

Country Status (16)

Country Link
US (1) US5446787A (da)
EP (1) EP0635178B1 (da)
JP (1) JPH07505986A (da)
KR (1) KR100271343B1 (da)
AT (1) ATE179849T1 (da)
AU (1) AU668558B2 (da)
BR (1) BR9306205A (da)
CA (1) CA2131890A1 (da)
DE (1) DE69324806T2 (da)
DK (1) DK0635178T3 (da)
ES (1) ES2132229T3 (da)
FI (1) FI944726L (da)
GR (1) GR3030748T3 (da)
NO (1) NO306919B1 (da)
SE (1) SE470119B (da)
WO (1) WO1993021695A1 (da)

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
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7215765B2 (en) * 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
KR20060087575A (ko) * 2003-09-23 2006-08-02 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 필터 장치 및 필터링 방법
ATE494669T1 (de) * 2006-11-17 2011-01-15 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
SE9201145L (sv) 1993-10-10
DE69324806T2 (de) 1999-10-07
AU668558B2 (en) 1996-05-09
SE9201145D0 (sv) 1992-04-09
ATE179849T1 (de) 1999-05-15
WO1993021695A1 (en) 1993-10-28
NO306919B1 (no) 2000-01-10
KR100271343B1 (ko) 2000-11-01
JPH07505986A (ja) 1995-06-29
GR3030748T3 (en) 1999-11-30
NO943781L (no) 1994-10-07
NO943781D0 (no) 1994-10-07
EP0635178B1 (en) 1999-05-06
DE69324806D1 (de) 1999-06-10
CA2131890A1 (en) 1993-10-28
ES2132229T3 (es) 1999-08-16
AU3963893A (en) 1993-11-18
EP0635178A1 (en) 1995-01-25
FI944726A7 (fi) 1994-10-07
BR9306205A (pt) 1998-06-23
DK0635178T3 (da) 1999-11-15
FI944726A0 (fi) 1994-10-07
KR950701165A (ko) 1995-02-20
FI944726L (fi) 1994-10-07
US5446787A (en) 1995-08-29

Similar Documents

Publication Publication Date Title
CA1221180A (en) Method of and device for the digital cancellation of the echo generated in connections with time-varying characteristics
EP0829147B1 (en) System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
AU767771B2 (en) Digital adaptive filter and acoustic echo canceller using the same
EP0736235A1 (en) Method for determining the location of echo in an echo cancellar
KR19990035995A (ko) 입력 신호의 간섭 성분을 억제하기 위한 장치
US5428605A (en) Method and echo canceller for echo cancellation with a number of cascade-connected adaptive filters
SE470119B (sv) Metod för att undvika självsvängning i en fyrtrådsslinga i samband med ekosläckning
CA2171778A1 (en) Method and apparatus for adaptive filtering
EP1459510A1 (en) Echo canceller having spectral echo tail estimator
KR100561390B1 (ko) 디지털 에코 제거장치
GB2237483A (en) An adaptive fir filter having restricted coefficient ranges
EP1624590B1 (en) Method of adaptive step control in echo cancellers
JP2615808B2 (ja) エコーキャンセラー装置
JP3217618B2 (ja) 音響反響除去装置
KR20020055806A (ko) 적응 반향 제거 장치 및 방법
JP3217614B2 (ja) 音響反響除去装置
JP3217619B2 (ja) 音響反響除去装置
US1903875A (en) Transmission control
Lieu Robust line echo cancellation in complicated phone call environment
KR20010009502A (ko) 디지털 에코 제거 장치
JPH0964793A (ja) 拡声情報通信システム

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 9201145-1

Format of ref document f/p: F

NUG Patent has lapsed