ES2037153T3 - Procedimiento para la amortiguacion vocalmente controlada en circuitos de transmision telefonica. - Google Patents
Procedimiento para la amortiguacion vocalmente controlada en circuitos de transmision telefonica.Info
- Publication number
- ES2037153T3 ES2037153T3 ES198888112418T ES88112418T ES2037153T3 ES 2037153 T3 ES2037153 T3 ES 2037153T3 ES 198888112418 T ES198888112418 T ES 198888112418T ES 88112418 T ES88112418 T ES 88112418T ES 2037153 T3 ES2037153 T3 ES 2037153T3
- Authority
- ES
- Spain
- Prior art keywords
- frequency sub
- band
- procedure
- bands
- speech
- 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 - Lifetime
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
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Transmitters (AREA)
- Interface Circuits In Exchanges (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
EN EL PROCEDIMIENTO PARA LA REGULACION DE AMORTIGUACION DIRIGIDA VOCALMENTE EN CIRCUITOS DE TRANSMICION TELEFONICA, ESPECIALMENTE PARA DISPOSITIVOS TELEFONICOS ESTA PREVISTO UN DISPOSITIVO DE MANDO DONDE LA BANDA DE FRECUENCIA VOCAL QUE LLEGA SE DESCOMPONE EN VARIAS BANDAS DE FRECUENCIA PARCIALES MEDIANTE BANCOS DE FILTRO POLIFACETICOS DE ANALISIS. PARA CADA BANDA DE FRECUENCIA PARCIAL ESTAN PREVISTAS ARTICULACIONES DE AMORTIGUACION AJUSTABLES PARA LA DIRECCION DE TRANSMISION, QUE SE DIRIGEN DESDE BALANZAS DE NIVEL. LAS BALANZAS DE NIVEL RECIBEN DU ORDEN DE AJUSTE DE COLOCACIONES LOGICAS DE VALORACION QUE SE CONECTAN PARA LA BANDA DE FRECUENCIA PARCIAL INDIVIDUALES SE VUELCEN A REUNIR TRAS LA REGULACION DE AMORTIGUACION A UNA BANDA DE FRECUENCIA VOCAL GENERAL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3728109A DE3728109C1 (de) | 1987-08-22 | 1987-08-22 | Verfahren fuer die sprachgesteuerte Daempfungsregelung in Fernsprechuebertragungskreisen |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2037153T3 true ES2037153T3 (es) | 1993-06-16 |
Family
ID=6334313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES198888112418T Expired - Lifetime ES2037153T3 (es) | 1987-08-22 | 1988-07-30 | Procedimiento para la amortiguacion vocalmente controlada en circuitos de transmision telefonica. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4991167A (es) |
EP (1) | EP0304674B1 (es) |
AT (1) | ATE83109T1 (es) |
DE (1) | DE3728109C1 (es) |
ES (1) | ES2037153T3 (es) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5148426A (en) * | 1990-06-08 | 1992-09-15 | Dsc Communications Corporation | Integrated echo canceling multiplexor |
DE4021787A1 (de) * | 1990-07-09 | 1992-01-16 | Telefunken Electronic Gmbh | Elektro-akustisches system |
US5153875A (en) * | 1991-03-25 | 1992-10-06 | Level One Communications, Inc. | Adaptive balancing network |
US5280525A (en) * | 1991-09-27 | 1994-01-18 | At&T Bell Laboratories | Adaptive frequency dependent compensation for telecommunications channels |
US5271057A (en) * | 1991-10-09 | 1993-12-14 | Bell Communications Research, Inc. | Audio processing system for teleconferencing system |
DE4228407C2 (de) * | 1992-08-26 | 1994-06-30 | Ant Nachrichtentech | Teilnehmer für eine Gesellschaftsleitung sowie Verfahren zum Aufbau einer Verbindung zwischen Teilnehmern einer Gesellschaftsleitung |
US5548638A (en) * | 1992-12-21 | 1996-08-20 | Iwatsu Electric Co., Ltd. | Audio teleconferencing apparatus |
US5434912A (en) * | 1993-08-11 | 1995-07-18 | Bell Communications Research, Inc. | Audio processing system for point-to-point and multipoint teleconferencing |
US5471527A (en) | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
JP2606167B2 (ja) * | 1994-12-07 | 1997-04-30 | 日本電気株式会社 | 電話機 |
US5587998A (en) * | 1995-03-03 | 1996-12-24 | At&T | Method and apparatus for reducing residual far-end echo in voice communication networks |
WO1997045995A1 (en) * | 1996-05-31 | 1997-12-04 | Philips Electronics N.V. | Arrangement for suppressing an interfering component of an input signal |
DE19650410C1 (de) * | 1996-12-05 | 1998-05-07 | Deutsche Telekom Ag | Verfahren und Vorrichtung zur Stör- und Echounterdrückung |
US5973740A (en) * | 1997-10-27 | 1999-10-26 | International Business Machines Corporation | Multi-format reduced memory video decoder with adjustable polyphase expansion filter |
DE19805942C1 (de) * | 1998-02-13 | 1999-08-12 | Siemens Ag | Verfahren zur Verbesserung der akustischen Rückhördämpfung in Freisprecheinrichtungen |
DE19919370C2 (de) * | 1999-04-28 | 2003-05-28 | Siemens Ag | Freisprecheinrichtung und Verfahren zum Betrieb einer solchen |
US6798881B2 (en) | 1999-06-07 | 2004-09-28 | Acoustic Technologies, Inc. | Noise reduction circuit for telephones |
US6608898B1 (en) | 1999-10-06 | 2003-08-19 | Acoustic Technologies, Inc. | Band pass and notch filters for echo reduction with less phase distortion |
US6963642B1 (en) * | 1999-12-30 | 2005-11-08 | Acoustic Technology, Inc. | Band-by-band full duplex communication |
US6931124B1 (en) | 2000-01-13 | 2005-08-16 | Acoustic Technology, Inc. | Soft mute circuit |
US20030123644A1 (en) * | 2000-01-26 | 2003-07-03 | Harrow Scott E. | Method and apparatus for removing audio artifacts |
US7433462B2 (en) * | 2002-10-31 | 2008-10-07 | Plantronics, Inc | Techniques for improving telephone audio quality |
US20050286443A1 (en) * | 2004-06-29 | 2005-12-29 | Octiv, Inc. | Conferencing system |
US20050285935A1 (en) * | 2004-06-29 | 2005-12-29 | Octiv, Inc. | Personal conferencing node |
US7486979B2 (en) * | 2005-09-30 | 2009-02-03 | Nellcor Puritan Bennett Llc | Optically aligned pulse oximetry sensor and technique for using the same |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699271A (en) * | 1970-11-16 | 1972-10-17 | Bell Telephone Labor Inc | Speech processor using multiband controlled center clipping |
US3900708A (en) * | 1972-03-31 | 1975-08-19 | Siemens Ag | Selective echo suppressor |
US3946170A (en) * | 1973-11-29 | 1976-03-23 | Brooks Fred A | Self regulating telephone sets |
DE2714132C3 (de) * | 1977-03-30 | 1980-02-07 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung für ein sprachgesteuertes Lautfernsprechgerät |
FR2412210A1 (fr) * | 1977-12-14 | 1979-07-13 | Cit Alcatel | Poste telephonique a haut-parleur |
JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
US4600815A (en) * | 1982-07-30 | 1986-07-15 | Communications Satellite Corporation | Automatic gain control for echo cancellers and similar adaptive systems |
JPS59193660A (ja) * | 1983-04-18 | 1984-11-02 | Nec Corp | 会議電話装置 |
DE3407203A1 (de) * | 1984-02-28 | 1985-08-29 | Siemens AG, 1000 Berlin und 8000 München | Fernsprechstation mit freisprechen |
DE3431141A1 (de) * | 1984-08-24 | 1986-03-06 | Siemens Ag | Transversalfilter-echokompensator fuer lange akustische echos |
US4641339A (en) * | 1985-03-27 | 1987-02-03 | Itt Corporation | Variable bandwidth handsfree telephone using switched capacitor filtering |
GB2174578B (en) * | 1985-05-04 | 1988-11-09 | Stc Plc | Loud speaking telephone |
CA1233925A (en) * | 1985-05-10 | 1988-03-08 | Gordon J. Reesor | Digital loudspeaking telephone |
JPH0746791B2 (ja) * | 1985-07-17 | 1995-05-17 | 日本電信電話株式会社 | ハウリング抑圧回路 |
DE3528973A1 (de) * | 1985-08-13 | 1987-02-26 | Telefonbau & Normalzeit Gmbh | Schaltungsanordnung fuer die sprachgesteuerte daempfung zweier signalwege mit gegeneinander gerichteten uebertragungsrichtungen |
US4715063A (en) * | 1985-08-20 | 1987-12-22 | Motorola, Inc. | Speakerphone for radio and landline telephones |
DE3706540A1 (de) * | 1986-03-03 | 1987-09-10 | Head Stereo Gmbh | Einrichtung zur verbesserung der rueckhoerdaempfung bzw. schleifenverstaerkung bei gegensprecheinrichtungen |
JPS6343451A (ja) * | 1986-08-11 | 1988-02-24 | Mitsubishi Electric Corp | 拡声通話回路 |
-
1987
- 1987-08-22 DE DE3728109A patent/DE3728109C1/de not_active Expired
-
1988
- 1988-07-30 AT AT88112418T patent/ATE83109T1/de not_active IP Right Cessation
- 1988-07-30 EP EP88112418A patent/EP0304674B1/de not_active Expired - Lifetime
- 1988-07-30 ES ES198888112418T patent/ES2037153T3/es not_active Expired - Lifetime
-
1989
- 1989-02-06 US US07/307,324 patent/US4991167A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0304674A3 (en) | 1989-06-07 |
EP0304674A2 (de) | 1989-03-01 |
US4991167A (en) | 1991-02-05 |
DE3728109C1 (de) | 1989-03-16 |
EP0304674B1 (de) | 1992-12-02 |
ATE83109T1 (de) | 1992-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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