DE69232501D1 - Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter - Google Patents

Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter

Info

Publication number
DE69232501D1
DE69232501D1 DE69232501T DE69232501T DE69232501D1 DE 69232501 D1 DE69232501 D1 DE 69232501D1 DE 69232501 T DE69232501 T DE 69232501T DE 69232501 T DE69232501 T DE 69232501T DE 69232501 D1 DE69232501 D1 DE 69232501D1
Authority
DE
Germany
Prior art keywords
branch
transmitting
signal
filter
risk
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 - Lifetime
Application number
DE69232501T
Other languages
German (de)
English (en)
Inventor
Mikael Andre
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 DE69232501D1 publication Critical patent/DE69232501D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
DE69232501T 1992-01-10 1992-12-17 Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter Expired - Lifetime DE69232501D1 (de)

Applications Claiming Priority (2)

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
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

Publications (1)

Publication Number Publication Date
DE69232501D1 true DE69232501D1 (de) 2002-04-25

Family

ID=20384984

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69232501T Expired - Lifetime DE69232501D1 (de) 1992-01-10 1992-12-17 Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter

Country Status (15)

Country Link
US (1) US5428681A (https=)
EP (1) EP0620956B1 (https=)
JP (1) JPH07503109A (https=)
KR (1) KR940704084A (https=)
AT (1) ATE214850T1 (https=)
AU (1) AU665231B2 (https=)
BR (1) BR9207028A (https=)
CA (1) CA2125658A1 (https=)
DE (1) DE69232501D1 (https=)
ES (1) ES2173092T3 (https=)
FI (1) FI943271A7 (https=)
MX (1) MX9300074A (https=)
NO (1) NO306278B1 (https=)
SE (1) SE469677B (https=)
WO (1) WO1993014566A1 (https=)

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
EP0620956A1 (en) 1994-10-26
ATE214850T1 (de) 2002-04-15
AU3411793A (en) 1993-08-03
JPH07503109A (ja) 1995-03-30
US5428681A (en) 1995-06-27
NO942418D0 (https=) 1994-06-24
NO306278B1 (no) 1999-10-11
BR9207028A (pt) 1995-12-05
SE9200062D0 (sv) 1992-01-10
WO1993014566A1 (en) 1993-07-22
SE9200062L (sv) 1993-07-11
EP0620956B1 (en) 2002-03-20
SE469677B (sv) 1993-08-16
FI943271A0 (fi) 1994-07-08
NO942418L (no) 1994-06-24
KR940704084A (ko) 1994-12-12
CA2125658A1 (en) 1993-07-22
AU665231B2 (en) 1995-12-21
ES2173092T3 (es) 2002-10-16
FI943271A7 (fi) 1994-07-08
MX9300074A (es) 1993-07-01

Similar Documents

Publication Publication Date Title
AU680981B2 (en) Method for determining the location of echo in an echo cancellar
CA2189489A1 (en) Method and apparatus for reducing residual far-end echo in voice communication networks
KR960702965A (ko) 반향소거장치 및 반향경로 추정방법
ATE343874T1 (de) Echounterdrückung unter verwendung von vordergrund- und hintergrundfiltern
CA2132428A1 (en) Speech communication apparatus
KR100395196B1 (en) Method and apparatus for detecting near-end speech signal
CA2226083A1 (en) Spectral noise compensation for echo cancellation
FI963769A0 (fi) Akustisen kaiun kumoaja, jossa on adaptiivinen suodin, jossa siirrytään taajuustasoon
ATE341129T1 (de) Echokompensation und -unterdrückung
EP0766413A3 (en) Fast response gain tracker for echo canceller
EP0766412A3 (en) Echo canceller using initial training
DE69535121D1 (de) Echokompensator und dessen lernverfahren
WO1999060720A3 (en) Echo cancellation in digital data transmission system
DE69232501D1 (de) Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter
EP0817398A3 (en) Intelligent near-end speech detection
DE69324806D1 (de) Verfahren zum vermeiden von eigenschwingungen in zusammenhang mit echokompensation
ATE147211T1 (de) Verfahren zur nichtlinearen signalverarbeitung in einem echokompensator
SE8205840D0 (sv) Ekoeliminator
SE9503545L (sv) Adaptivt ekosläckningsförfarande
MX9605354A (es) Metodo y aparato para reducir el eco residual del extremo lejano en redes de comunicacion de voz.
ATE161376T1 (de) Verfahren und vorrichtung zur adaptiven akustischen echokompensation
ATE282925T1 (de) Verfahren und vorrichtung zur echounterdrückung bei einer freisprecheinrichtung, insbesondere für ein telefon
TW296528B (en) Method and apparatus for detecting a near-end speech signal
DE59603143D1 (de) Verfahren zur Echokompensation

Legal Events

Date Code Title Description
8332 No legal effect for de