IT1228106B - Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo - Google Patents

Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo

Info

Publication number
IT1228106B
IT1228106B IT8823032A IT2303288A IT1228106B IT 1228106 B IT1228106 B IT 1228106B IT 8823032 A IT8823032 A IT 8823032A IT 2303288 A IT2303288 A IT 2303288A IT 1228106 B IT1228106 B IT 1228106B
Authority
IT
Italy
Prior art keywords
echo
procedure
adaptive
cancellation
eco
Prior art date
Application number
IT8823032A
Other languages
English (en)
Other versions
IT8823032A0 (it
Inventor
Giacomo Cannalire
Roberto Ravasio
Giacomo Premoli
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Priority to IT8823032A priority Critical patent/IT1228106B/it
Publication of IT8823032A0 publication Critical patent/IT8823032A0/it
Priority to DE8989203107T priority patent/DE68905782T2/de
Priority to AT89203107T priority patent/ATE87779T1/de
Priority to EP89203107A priority patent/EP0375015B1/en
Priority to ES198989203107T priority patent/ES2041980T3/es
Application granted granted Critical
Publication of IT1228106B publication Critical patent/IT1228106B/it
Priority to US07/870,179 priority patent/US5418849A/en

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
    • H04B3/234—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 using double talk detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
IT8823032A 1988-12-21 1988-12-21 Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo IT1228106B (it)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT8823032A IT1228106B (it) 1988-12-21 1988-12-21 Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo
DE8989203107T DE68905782T2 (de) 1988-12-21 1989-12-07 Verfahren und anordnung zur adaptiven digitalen loeschung des im fernsprechverbindungen mit zeitvarianten eigenschaften erzeugten echos.
AT89203107T ATE87779T1 (de) 1988-12-21 1989-12-07 Verfahren und anordnung zur adaptiven digitalen loeschung des im fernsprechverbindungen mit zeitvarianten eigenschaften erzeugten echos.
EP89203107A EP0375015B1 (en) 1988-12-21 1989-12-07 Method and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics
ES198989203107T ES2041980T3 (es) 1988-12-21 1989-12-07 Procedimiento y dispositivo para la cancelacion digital adaptable del eco generado en conexiones telefonicas con caracteristicas cronovariables.
US07/870,179 US5418849A (en) 1988-12-21 1992-04-16 Procedure and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8823032A IT1228106B (it) 1988-12-21 1988-12-21 Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo

Publications (2)

Publication Number Publication Date
IT8823032A0 IT8823032A0 (it) 1988-12-21
IT1228106B true IT1228106B (it) 1991-05-28

Family

ID=11203092

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8823032A IT1228106B (it) 1988-12-21 1988-12-21 Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo

Country Status (5)

Country Link
EP (1) EP0375015B1 (it)
AT (1) ATE87779T1 (it)
DE (1) DE68905782T2 (it)
ES (1) ES2041980T3 (it)
IT (1) IT1228106B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2038887B1 (es) * 1991-04-18 1995-05-01 Aplicaciones Electronicas Quas Hibrida digital para multiconferencia.
ES2038904B1 (es) * 1991-09-10 1995-01-16 Alcatel Standard Electrica Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.
IT1254819B (it) * 1992-02-24 1995-10-11 Sits Soc It Telecom Siemens Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici non stazionari
FI935834A7 (fi) * 1993-12-23 1995-06-24 Nokia Corp Menetelmä kaikukohtaan sovittautumiseksi kaiunpoistajassa
US5535194A (en) * 1994-07-14 1996-07-09 Motorola, Inc. Method and apparatus for echo canceling with double-talk immunity
SE516835C2 (sv) * 1995-02-15 2002-03-12 Ericsson Telefon Ab L M Ekosläckningsförfarande

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1208769B (it) * 1983-10-12 1989-07-10 Cselt Centro Studi Lab Telecom Teristiche varianti nel tempo procedimento e dispositivo per la cancellazione numerica dell eco generato in collegamenti con carat

Also Published As

Publication number Publication date
IT8823032A0 (it) 1988-12-21
ES2041980T3 (es) 1993-12-01
EP0375015B1 (en) 1993-03-31
DE68905782D1 (de) 1993-05-06
DE68905782T2 (de) 1993-08-26
EP0375015A2 (en) 1990-06-27
ATE87779T1 (de) 1993-04-15
EP0375015A3 (en) 1992-04-01

Similar Documents

Publication Publication Date Title
ITMI920398A1 (it) Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici non stazionari
KR100233077B1 (ko) 반향소거장치
US6597787B1 (en) Echo cancellation device for cancelling echos in a transceiver unit
EP0627139B1 (en) Feedback level estimator between loudspeaker and microphone
US6868157B1 (en) Echo canceling method, echo canceller and voice switch
JP3679245B2 (ja) エコー消去システム及び方法、並びに移動通信装置
US5818945A (en) Subband echo cancellation method using projection algorithm
EP0174749A1 (en) Echo canceller
CA2170811A1 (en) Noise Cancelling Device Capable of Achieving a Reduced Convergence Time and a Reduced Residual Error After Convergence
JP2006191650A (ja) エコー打消装置においてエコーの位置を決定する方法
EP0121557B1 (en) Adaptive filter including controlled tap gain coefficient drift
US7394898B1 (en) Echo removing apparatus
US6185299B1 (en) Adaptive echo cancellation device in a voice communication system
US6108412A (en) Adaptive echo cancelling system for telephony applications
IT1228106B (it) Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo
US20040252826A1 (en) Echo canceller and a method of cancelling echo
KR100415525B1 (ko) 에코제거장치
US4578543A (en) Digital echo canceller
ATE54520T1 (de) Verfahren und einrichtung zur einstellung eines digitalen entzerrungsfilters bei gleichzeitiger adaptiver echoloeschung und adaptiven intersymbolinterferenzstoerungsbeseitigung.
US6947395B1 (en) Locating network echos
JPH0541681A (ja) エコーキヤンセラ
JPH07303067A (ja) エコーキャンセラ
DE69223565D1 (de) Verfahren und Vorrichtung zur adaptiven akustischen Echokompensation
JPH0897752A (ja) 音響反響除去装置
JPS6016032A (ja) 適応型反響消去装置

Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19961218