BR9910310A - Processo e disposição para compesação de eco em faixas parciais - Google Patents

Processo e disposição para compesação de eco em faixas parciais

Info

Publication number
BR9910310A
BR9910310A BR9910310-9A BR9910310A BR9910310A BR 9910310 A BR9910310 A BR 9910310A BR 9910310 A BR9910310 A BR 9910310A BR 9910310 A BR9910310 A BR 9910310A
Authority
BR
Brazil
Prior art keywords
arrangement
partial
echo compensation
partial ranges
compensation
Prior art date
Application number
BR9910310-9A
Other languages
English (en)
Inventor
Horst-Juergen Kratschmann
Konrad Bertignoll
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of BR9910310A publication Critical patent/BR9910310A/pt

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)

Abstract

Patente de Invenção: <B>''PROCESSO E DISPOSIçãO PARA COMPENSAçãO DE ECO EM FAIXAS PARCIAIS''<D>. Compensador de eco com várias faixas parciais, no qual apenas em uma faixa parcial é usado um filtro de FIR (FIR1) completo e nas faixas parciais restantes estão previstos filtros de FIR (FIR2)encurtados, que estão respectivamente ligados em série com um elemento de retardamento (Z) ajustável.
BR9910310-9A 1998-05-08 1999-05-03 Processo e disposição para compesação de eco em faixas parciais BR9910310A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19820690A DE19820690C2 (de) 1998-05-08 1998-05-08 Verfahren und Anordnung zur Echokompensation in Teilbändern
PCT/DE1999/001320 WO1999059260A1 (de) 1998-05-08 1999-05-03 Verfahren und anordnung zur echokompensation in teilbändern

Publications (1)

Publication Number Publication Date
BR9910310A true BR9910310A (pt) 2001-01-16

Family

ID=7867143

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9910310-9A BR9910310A (pt) 1998-05-08 1999-05-03 Processo e disposição para compesação de eco em faixas parciais

Country Status (5)

Country Link
US (1) US6690791B1 (pt)
CN (1) CN1308791A (pt)
BR (1) BR9910310A (pt)
DE (1) DE19820690C2 (pt)
WO (1) WO1999059260A1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953347A1 (de) * 1999-11-05 2001-06-28 Infineon Technologies Ag Echokompensationsvorrichtung
US7068780B1 (en) * 2000-08-30 2006-06-27 Conexant, Inc. Hybrid echo canceller
TW200845718A (en) * 2007-03-09 2008-11-16 Fortemedia Inc Method and apparatus for echo cancellation
CN103379070B (zh) * 2012-04-18 2017-03-29 电信科学技术研究院 一种re检测方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431141A1 (de) 1984-08-24 1986-03-06 Siemens Ag Transversalfilter-echokompensator fuer lange akustische echos
JPH06318885A (ja) * 1993-03-11 1994-11-15 Nec Corp 帯域分割適応フィルタによる未知システム同定の方法及び装置
JPH06338829A (ja) * 1993-05-28 1994-12-06 American Teleph & Telegr Co <Att> 通信システム内の反響除去方法と装置
US5631957A (en) * 1995-03-09 1997-05-20 National Semiconductor Corporation Band-energy near-end echo reducer for tonal signalling detectors
JP3199155B2 (ja) * 1995-10-18 2001-08-13 日本電信電話株式会社 反響消去装置
US5970154A (en) * 1997-06-16 1999-10-19 Industrial Technology Research Institute Apparatus and method for echo cancellation

Also Published As

Publication number Publication date
CN1308791A (zh) 2001-08-15
DE19820690A1 (de) 1999-11-18
WO1999059260A1 (de) 1999-11-18
DE19820690C2 (de) 2000-05-25
US6690791B1 (en) 2004-02-10

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7A, 8A E 9A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO PUBLICADO NA RPI 1962 DE 12/08/2008.