SE469677B - Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering - Google Patents

Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering

Info

Publication number
SE469677B
SE469677B SE9200062A SE9200062A SE469677B SE 469677 B SE469677 B SE 469677B SE 9200062 A SE9200062 A SE 9200062A SE 9200062 A SE9200062 A SE 9200062A SE 469677 B SE469677 B SE 469677B
Authority
SE
Sweden
Prior art keywords
filter
signal
branch
echo
correlation
Prior art date
Application number
SE9200062A
Other languages
English (en)
Swedish (sv)
Other versions
SE9200062L (sv
SE9200062D0 (sv
Inventor
T M Andre
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 SE9200062A priority Critical patent/SE469677B/sv
Publication of SE9200062D0 publication Critical patent/SE9200062D0/xx
Priority to AU34117/93A priority patent/AU665231B2/en
Priority to EP93902608A priority patent/EP0620956B1/de
Priority to KR1019940702392A priority patent/KR940704084A/ko
Priority to JP5512372A priority patent/JPH07503109A/ja
Priority to CA002125658A priority patent/CA2125658A1/en
Priority to BR9207028A priority patent/BR9207028A/pt
Priority to DE69232501T priority patent/DE69232501D1/de
Priority to ES93902608T priority patent/ES2173092T3/es
Priority to PCT/SE1992/000872 priority patent/WO1993014566A1/en
Priority to AT93902608T priority patent/ATE214850T1/de
Priority to MX9300074A priority patent/MX9300074A/es
Publication of SE9200062L publication Critical patent/SE9200062L/
Publication of SE469677B publication Critical patent/SE469677B/sv
Priority to NO942418A priority patent/NO306278B1/no
Priority to US08/271,246 priority patent/US5428681A/en
Priority to FI943271A priority patent/FI943271A0/fi

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H21/0067—Means or methods for compensation of undesirable effects
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • 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)
  • Filters That Use Time-Delay Elements (AREA)
SE9200062A 1992-01-10 1992-01-10 Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering SE469677B (sv)

Priority Applications (15)

Application Number Priority Date Filing Date Title
SE9200062A SE469677B (sv) 1992-01-10 1992-01-10 Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering
AT93902608T ATE214850T1 (de) 1992-01-10 1992-12-17 Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter
BR9207028A BR9207028A (pt) 1992-01-10 1992-12-17 Aparelho para reduzir o risco de desvio indesejável dos parâmetros de um filtro adaptador usuado para cancelamento de eco
ES93902608T ES2173092T3 (es) 1992-01-10 1992-12-17 Aparato para reducir el riesgo de derivas indeseables de los parametros de un filtro adaptable utilizado para eliminacion de eco.
KR1019940702392A KR940704084A (ko) 1992-01-10 1992-12-17 에코제거를 위해 이용되는 적응필터의 바람직하지 않은 파라미터드리프트의 위험을 감소시키는 장치(apparatus for reducing the risk of undesirable parameterdrift of an adaptive filter used for echo cancellation)
JP5512372A JPH07503109A (ja) 1992-01-10 1992-12-17 エコー抑止に用いる適応フィルタの不要なパラメータ・ドリフトの危険性を減少させる装置
CA002125658A CA2125658A1 (en) 1992-01-10 1992-12-17 Apparatus for reducing the risk of undesirable parameter drift of an adaptive filter used for echo cancellation
AU34117/93A AU665231B2 (en) 1992-01-10 1992-12-17 Apparatus for reducing the risk of undesirable parameterdrift of an adaptive filter used for echo cancellation
DE69232501T DE69232501D1 (de) 1992-01-10 1992-12-17 Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter
EP93902608A EP0620956B1 (de) 1992-01-10 1992-12-17 Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter
PCT/SE1992/000872 WO1993014566A1 (en) 1992-01-10 1992-12-17 Apparatus for reducing the risk of undesirable parameterdrift of an adaptive filter used for echo cancellation
MX9300074A MX9300074A (es) 1992-01-10 1993-01-08 Aparato para reducir el riesgo de una variacion indeseable de parametros de un filtro adaptable utilizado para cancelacion de eco.
NO942418A NO306278B1 (no) 1992-01-10 1994-06-24 Anordning for Õ redusere risikoen for uönsket parameteravdrift for et adaptivt filter brukt for ekkokansellering
US08/271,246 US5428681A (en) 1992-01-10 1994-07-07 Apparatus and method for reducing the risk of undesirable parameter drift of an adaptive filter used for echo cancellation
FI943271A FI943271A0 (fi) 1992-01-10 1994-07-08 Laite kaiun poistoon käytetyn adaptiivisen suodattimen parametrien ei-toivotun ajelehtimisen riskin vähentämiseksi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9200062A SE469677B (sv) 1992-01-10 1992-01-10 Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering

Publications (3)

Publication Number Publication Date
SE9200062D0 SE9200062D0 (sv) 1992-01-10
SE9200062L SE9200062L (sv) 1993-07-11
SE469677B true SE469677B (sv) 1993-08-16

Family

ID=20384984

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9200062A SE469677B (sv) 1992-01-10 1992-01-10 Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering

Country Status (15)

Country Link
US (1) US5428681A (de)
EP (1) EP0620956B1 (de)
JP (1) JPH07503109A (de)
KR (1) KR940704084A (de)
AT (1) ATE214850T1 (de)
AU (1) AU665231B2 (de)
BR (1) BR9207028A (de)
CA (1) CA2125658A1 (de)
DE (1) DE69232501D1 (de)
ES (1) ES2173092T3 (de)
FI (1) FI943271A0 (de)
MX (1) MX9300074A (de)
NO (1) NO306278B1 (de)
SE (1) SE469677B (de)
WO (1) WO1993014566A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430189A1 (de) * 1994-08-25 1996-02-29 Sel Alcatel Ag Verfahren zur adaptiven Echokompensation
US5852661A (en) * 1995-02-17 1998-12-22 Advanced Micro Devices, Inc. Adaptive echo cancellation used with echo suppression to reduce short and long duration echoes
US5592548A (en) * 1995-05-31 1997-01-07 Qualcomm Incorporated System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
US5689556A (en) * 1995-09-15 1997-11-18 Hughes Electronics Method of detecting narrow-band signals in an echo canceller
US6728223B1 (en) * 1996-06-28 2004-04-27 Mci Communications Corporation Echo canceller system
JP2001525147A (ja) * 1998-01-30 2001-12-04 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 通信システムにおいてエコーキャンセル方法、通信システム、通信装置、及び、コードレス電話機の無線基地局
TW441171B (en) * 1999-09-16 2001-06-16 Ind Tech Res Inst Learning method and apparatus for adaptive digital filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672665A (en) * 1984-07-27 1987-06-09 Matsushita Electric Industrial Co. Ltd. Echo canceller
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
CA1242541A (en) * 1985-11-25 1988-09-27 Dany Sylvain Echo cancellation in two-wire transmission path repeaters
US4845746A (en) * 1987-06-23 1989-07-04 Rockwell International Corporation Echo canceller with relative feedback control
DE3840433A1 (de) * 1988-12-01 1990-06-07 Philips Patentverwaltung Echokompensator

Also Published As

Publication number Publication date
FI943271A (fi) 1994-07-08
NO942418D0 (de) 1994-06-24
ES2173092T3 (es) 2002-10-16
AU665231B2 (en) 1995-12-21
JPH07503109A (ja) 1995-03-30
SE9200062L (sv) 1993-07-11
KR940704084A (ko) 1994-12-12
MX9300074A (es) 1993-07-01
EP0620956A1 (de) 1994-10-26
DE69232501D1 (de) 2002-04-25
EP0620956B1 (de) 2002-03-20
WO1993014566A1 (en) 1993-07-22
FI943271A0 (fi) 1994-07-08
US5428681A (en) 1995-06-27
ATE214850T1 (de) 2002-04-15
CA2125658A1 (en) 1993-07-22
AU3411793A (en) 1993-08-03
BR9207028A (pt) 1995-12-05
NO306278B1 (no) 1999-10-11
SE9200062D0 (sv) 1992-01-10
NO942418L (no) 1994-06-24

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