MX9800175A - Compensacion de ruido espectral para cancelacion de eco. - Google Patents

Compensacion de ruido espectral para cancelacion de eco.

Info

Publication number
MX9800175A
MX9800175A MX9800175A MX9800175A MX9800175A MX 9800175 A MX9800175 A MX 9800175A MX 9800175 A MX9800175 A MX 9800175A MX 9800175 A MX9800175 A MX 9800175A MX 9800175 A MX9800175 A MX 9800175A
Authority
MX
Mexico
Prior art keywords
signals
subband
send
input signal
receive
Prior art date
Application number
MX9800175A
Other languages
English (en)
Inventor
Roland E Genter
Original Assignee
Tellabs Operations Inc
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 Tellabs Operations Inc filed Critical Tellabs Operations Inc
Publication of MX9800175A publication Critical patent/MX9800175A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
    • 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
    • H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Optical Communication System (AREA)

Abstract

Un cancelador de eco (10) incluye un banco de filtro de análisis (24) para dividir una señal de entrada de envío (SI) y una señal de entrada de recepcion (RI) en señales de entrada de envío sub-banda (SCI-SC16) y señales de recepcion sub-banda (RCI-RC16). Cada una de las señales de recepcion sub-banda (RCI-RC16) forma espiras con una funcion de respuesta de impulso que pertenece a la trayectoria de eco, que acopla a la señal de recepcion con la señal de entrada de envío dentro de cada sub-banda, dando señales de eco estimadas (EC1-EC16), que después se substrae de la señal de entrada de envío sub-banda correspondiente para producir señales de error (ER1-ER16). Los componentes de eco residuales dentro de las señales de error se atenuan por un atenuador variable señal de error atenuada para compensar la atenuacion del ruido de fondo incidental a la atenuacion variable de las señales de error.
MX9800175A 1995-07-06 1998-01-07 Compensacion de ruido espectral para cancelacion de eco. MX9800175A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/498,632 US5561668A (en) 1995-07-06 1995-07-06 Echo canceler with subband attenuation and noise injection control

Publications (1)

Publication Number Publication Date
MX9800175A true MX9800175A (es) 1998-11-29

Family

ID=23981871

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9800175A MX9800175A (es) 1995-07-06 1998-01-07 Compensacion de ruido espectral para cancelacion de eco.

Country Status (8)

Country Link
US (2) US5561668A (es)
EP (1) EP0872028A4 (es)
JP (1) JP2000502520A (es)
CN (1) CN1092870C (es)
AU (1) AU697941B2 (es)
CA (1) CA2226083C (es)
MX (1) MX9800175A (es)
WO (1) WO1997002664A1 (es)

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Also Published As

Publication number Publication date
US5561668A (en) 1996-10-01
CA2226083C (en) 2008-12-16
CN1194068A (zh) 1998-09-23
US5721730A (en) 1998-02-24
CN1092870C (zh) 2002-10-16
AU6451596A (en) 1997-02-05
EP0872028A1 (en) 1998-10-21
JP2000502520A (ja) 2000-02-29
CA2226083A1 (en) 1997-01-23
AU697941B2 (en) 1998-10-22
WO1997002664A1 (en) 1997-01-23
EP0872028A4 (en) 1999-07-28

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