ES2038904B1 - Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos. - Google Patents
Procedimiento y dispositivo de cancelacion adaptativa de ecos acusticos.Info
- Publication number
- ES2038904B1 ES2038904B1 ES09102024A ES9102024A ES2038904B1 ES 2038904 B1 ES2038904 B1 ES 2038904B1 ES 09102024 A ES09102024 A ES 09102024A ES 9102024 A ES9102024 A ES 9102024A ES 2038904 B1 ES2038904 B1 ES 2038904B1
- 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.)
- Expired - Fee Related
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.
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 ES2038904A2 (es) | 1993-08-01 |
ES2038904R ES2038904R (es) | 1994-07-01 |
ES2038904B1 true 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) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2101633B1 (es) * | 1994-05-31 | 1998-03-01 | Alcatel Standard Electrica | Terminal celular fijo para servicios de telecomunicaciones a dos hilos. |
US5535194A (en) * | 1994-07-14 | 1996-07-09 | Motorola, Inc. | Method and apparatus for echo canceling with double-talk immunity |
DE69713805T2 (de) * | 1996-04-03 | 2003-08-07 | British Telecomm | Korrektur einer akustischen rückkopplung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4621172A (en) * | 1982-12-22 | 1986-11-04 | Nec Corporation | Fast convergence method and system for echo canceller |
JPS62176337A (ja) * | 1986-01-30 | 1987-08-03 | Oki Electric Ind Co Ltd | 適応形エコ−キヤンセラ |
ATE77719T1 (de) * | 1986-11-17 | 1992-07-15 | Alcatel Nv | Einstellbarer echokompensator. |
NL8701633A (nl) * | 1987-07-10 | 1989-02-01 | Philips Nv | Digitale echocompensator. |
EP0310055B1 (en) * | 1987-10-02 | 1994-01-12 | Advanced Micro Devices, Inc. | Adaptive echo-canceller with double-talker detection |
SE461308B (sv) * | 1988-06-03 | 1990-01-29 | Ericsson Telefon Ab L M | Adaptivt digitalt filter omfattande en icke rekursiv del och en rekursiv del |
IT1228106B (it) * | 1988-12-21 | 1991-05-28 | Sits Soc It Telecom Siemens | Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo |
-
1991
- 1991-09-10 ES ES09102024A patent/ES2038904B1/es not_active Expired - Fee Related
-
1992
- 1992-08-26 AT AT92114499T patent/ATE161376T1/de not_active IP Right Cessation
- 1992-08-26 EP EP92114499A patent/EP0531796B1/en not_active Expired - Lifetime
- 1992-08-26 DE DE69223565T patent/DE69223565T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69223565T2 (de) | 1998-06-25 |
EP0531796A2 (en) | 1993-03-17 |
EP0531796A3 (en) | 1993-10-20 |
ES2038904R (es) | 1994-07-01 |
ES2038904A2 (es) | 1993-08-01 |
EP0531796B1 (en) | 1997-12-17 |
DE69223565D1 (de) | 1998-01-29 |
ATE161376T1 (de) | 1998-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20100504 |