ES2038904A2 - Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos. - Google Patents

Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.

Info

Publication number
ES2038904A2
ES2038904A2 ES919102024A ES9102024A ES2038904A2 ES 2038904 A2 ES2038904 A2 ES 2038904A2 ES 919102024 A ES919102024 A ES 919102024A ES 9102024 A ES9102024 A ES 9102024A ES 2038904 A2 ES2038904 A2 ES 2038904A2
Authority
ES
Spain
Prior art keywords
filter
iteration
account
takes
generation
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.)
Granted
Application number
ES919102024A
Other languages
English (en)
Other versions
ES2038904B1 (es
ES2038904R (es
Inventor
Borrallo Jose Manuel Paez
Otero Mariano Garcia
Mezcua Belen Ruiz
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.)
Nokia Spain SA
Original Assignee
Alcatel Standard Electrics SA
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 Alcatel Standard Electrics SA filed Critical Alcatel Standard Electrics SA
Priority to ES09102024A priority Critical patent/ES2038904B1/es
Priority to AT92114499T priority patent/ATE161376T1/de
Priority to DE69223565T priority patent/DE69223565T2/de
Priority to EP92114499A priority patent/EP0531796B1/en
Publication of ES2038904A2 publication Critical patent/ES2038904A2/es
Publication of ES2038904R publication Critical patent/ES2038904R/es
Application granted granted Critical
Publication of ES2038904B1 publication Critical patent/ES2038904B1/es
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04M9/085—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 digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PROCEDIMIENTO Y DISPOSITIVO DE CANCELACION ADAPTATIVA DE ECOS ACUSTICOS. APLICABLE AL FILTRADO ADAPTATIVO DE SEÑALES ACUSTICAS DE BANDA ANCHA, CON LA FINALIDAD DE ELIMINAR PROBLEMAS DE ECOS ACUSTICOS. EL PROCEDIMIENTO INCLUYE UNA ETAPA ADICIONAL DE GENERACION DE UN VECTOR DE INHIBIDORES (22) ASOCIADO A LOS DIFERENTES SEGMENTOS DEL FILTRO QUE SE NUTRE DE INFORMACION DE LA ETAPA DE MONITORIZACION DE ACTIVIDAD (19) DE LAS LINEAS DE EMISION Y RECEPCION. LA GENERACION DEL VECTOR DE INHIBIDORES (22) TIENE EN CUENTA LA EXISTENCIA O NO DE DOBLE LOCUCION, E IMPLANTA UNA ESTRATEGIA DE ADAPTACION QUE FIJA LAS SECCIONES DEL FILTRO A ACTUALIZAR EN CADA ITERACION. EL CALCULO DEL PASO DE ADAPTACION, INDEPENDIENTE PARA CADA SEGMENTO DEL FILTRO NO INHIBIDO EN ESA ITERACION, TIENE EN CUENTA LAS CARACTERISTICAS ESPECTRALES LOCALES DE LA SEÑAL DE VOZ E INCLUYE UNA ESTRATEGIA DE CALCULO NUEVA. EL DISPOSITIVO IMPLEMENTA LAS DIFERENTES FASES Y ETAPAS DEL PROCEDIMIENTO. LA INVENCION PRESENTA LAS VENTAJAS DE AUMENTAR LA VELOCIDAD DE CONVERGENCIA DEL ALGORITMO CON INDEPENDENCIA DE LAS CARACTERISTICAS ESPECTRALES DE LA SEÑAL DE ENTRADA, MEJORAR EL RENDIMIENTO DEL CANCELADOR DE ECOS, Y UTILIZAR UN UNICO PROCESADOR DIGITAL DE SEÑALES.
ES09102024A 1991-09-10 1991-09-10 Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos. Expired - Fee Related ES2038904B1 (es)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES09102024A ES2038904B1 (es) 1991-09-10 1991-09-10 Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.
AT92114499T ATE161376T1 (de) 1991-09-10 1992-08-26 Verfahren und vorrichtung zur adaptiven akustischen echokompensation
DE69223565T DE69223565T2 (de) 1991-09-10 1992-08-26 Verfahren und Vorrichtung zur adaptiven akustischen Echokompensation
EP92114499A EP0531796B1 (en) 1991-09-10 1992-08-26 Method and device for acoustic echo adaptive cancellation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES09102024A ES2038904B1 (es) 1991-09-10 1991-09-10 Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.

Publications (3)

Publication Number Publication Date
ES2038904A2 true ES2038904A2 (es) 1993-08-01
ES2038904R ES2038904R (es) 1994-07-01
ES2038904B1 ES2038904B1 (es) 1995-01-16

Family

ID=8273490

Family Applications (1)

Application Number Title Priority Date Filing Date
ES09102024A Expired - Fee Related ES2038904B1 (es) 1991-09-10 1991-09-10 Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.

Country Status (4)

Country Link
EP (1) EP0531796B1 (es)
AT (1) ATE161376T1 (es)
DE (1) DE69223565T2 (es)
ES (1) ES2038904B1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2101633A1 (es) * 1994-05-31 1997-07-01 Alcatel Standard Electrica Terminal celular fijo para servicios de telecomunicaciones a dos hilos.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5535194A (en) * 1994-07-14 1996-07-09 Motorola, Inc. Method and apparatus for echo canceling with double-talk immunity
CA2249283C (en) 1996-04-03 2003-06-03 British Telecommunications Public Limited Company Acoustic feedback correction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111938A1 (en) * 1982-12-22 1984-06-27 Nec Corporation Fast convergence method and system for echo canceller
EP0272714A1 (en) * 1986-11-17 1988-06-29 Alcatel N.V. Adjustable echo canceller
EP0310055A1 (en) * 1987-10-02 1989-04-05 Advanced Micro Devices, Inc. Adaptive echo-canceller with double-talker detection
EP0347394A1 (en) * 1988-06-03 1989-12-20 Telefonaktiebolaget L M Ericsson Adaptive, digital filter including a non-recursive part and a recursive part
EP0375015A2 (en) * 1988-12-21 1990-06-27 Siemens Telecomunicazioni S.P.A. Method and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62176337A (ja) * 1986-01-30 1987-08-03 Oki Electric Ind Co Ltd 適応形エコ−キヤンセラ
NL8701633A (nl) * 1987-07-10 1989-02-01 Philips Nv Digitale echocompensator.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111938A1 (en) * 1982-12-22 1984-06-27 Nec Corporation Fast convergence method and system for echo canceller
EP0272714A1 (en) * 1986-11-17 1988-06-29 Alcatel N.V. Adjustable echo canceller
EP0310055A1 (en) * 1987-10-02 1989-04-05 Advanced Micro Devices, Inc. Adaptive echo-canceller with double-talker detection
EP0347394A1 (en) * 1988-06-03 1989-12-20 Telefonaktiebolaget L M Ericsson Adaptive, digital filter including a non-recursive part and a recursive part
EP0375015A2 (en) * 1988-12-21 1990-06-27 Siemens Telecomunicazioni S.P.A. Method and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2101633A1 (es) * 1994-05-31 1997-07-01 Alcatel Standard Electrica Terminal celular fijo para servicios de telecomunicaciones a dos hilos.

Also Published As

Publication number Publication date
ES2038904B1 (es) 1995-01-16
DE69223565D1 (de) 1998-01-29
ATE161376T1 (de) 1998-01-15
EP0531796A2 (en) 1993-03-17
EP0531796A3 (en) 1993-10-20
EP0531796B1 (en) 1997-12-17
ES2038904R (es) 1994-07-01
DE69223565T2 (de) 1998-06-25

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Legal Events

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FD1A Patent lapsed

Effective date: 20100504