ES8503907A1 - Un dispositivo para telefono de manos libres - Google Patents
Un dispositivo para telefono de manos libresInfo
- Publication number
- ES8503907A1 ES8503907A1 ES530194A ES530194A ES8503907A1 ES 8503907 A1 ES8503907 A1 ES 8503907A1 ES 530194 A ES530194 A ES 530194A ES 530194 A ES530194 A ES 530194A ES 8503907 A1 ES8503907 A1 ES 8503907A1
- Authority
- ES
- Spain
- Prior art keywords
- speech
- channels
- circuit arrangement
- hands free
- free telephone
- 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
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
Abstract
DISPOSITIVO PARA TELEFONO DE MANOS LIBRES.CONSTA DE CANALES SEPARADOS PARA LA CONVERSION DE SALIDA Y LA DE ENTRADA, EN DONDE CADA CANAL SE MUESTREA A INTERVALOS PRESELECCIONADOS Y LOS RESULTADOS DE LOS MUESTREOS SE COMPARAN CADA UNO CON UNA AMPLITUD DE UMBRAL PRESELECCIONADO, EN DONDE EL NIVEL DE RUIDO DE FONDO EN LOS CANALES SE SUPERVISA Y LA AMPLITUD DE UMBRAL PARA CADA UNO DE LOS CANALES SE AJUSTA PARA QUE SEA IGUAL AL NIVEL DE RUIDO SUPERVISADO. CADA UNO DE LOS CANALES INCLUYE UN ATENUADOR CUYO VALOR SE AJUSTA DE ACUERDO CON LOS RESULTADOS DE LAS COMPARACIONES, ACTIVANDOSE Y DESACTIVANDOSE CADA CANAL DE CONVERSACION SEGUN LOS RESULTADOS DE LA COMPARACION.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08305572A GB2137458B (en) | 1983-03-01 | 1983-03-01 | Digital handsfree telephone |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8503907A1 true ES8503907A1 (es) | 1985-03-16 |
ES530194A0 ES530194A0 (es) | 1985-03-16 |
Family
ID=10538762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES530194A Granted ES530194A0 (es) | 1983-03-01 | 1984-03-01 | Un dispositivo para telefono de manos libres |
Country Status (8)
Country | Link |
---|---|
US (1) | US4560840A (es) |
EP (1) | EP0120325B1 (es) |
JP (1) | JPS59210758A (es) |
AU (1) | AU2505684A (es) |
BE (1) | BE899042R (es) |
DE (1) | DE3471221D1 (es) |
ES (1) | ES530194A0 (es) |
GB (1) | GB2137458B (es) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4712231A (en) * | 1984-04-06 | 1987-12-08 | Shure Brothers, Inc. | Teleconference system |
US4706274A (en) * | 1984-05-11 | 1987-11-10 | Southwestern Bell Telecommunications, Inc. | Cordless telephone system |
US4696032A (en) * | 1985-02-26 | 1987-09-22 | Siemens Corporate Research & Support, Inc. | Voice switched gain system |
US4715062A (en) * | 1985-03-22 | 1987-12-22 | Tie/Communications, Inc. | Speakerphone control circuit having low gain states and method for controlling gain of speakerphone |
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 |
US5022074A (en) * | 1985-07-01 | 1991-06-04 | Rockwell International Corporation | Digital echo suppressor |
US4748665A (en) * | 1985-07-01 | 1988-05-31 | Rockwell International Corporation | Analog echo suppressor |
US4700382A (en) * | 1986-03-03 | 1987-10-13 | American Telephone And Telegraph Company, At&T Information Systems, Inc. | Voice-switched telephone circuit with center idle state |
JPH0622344B2 (ja) * | 1986-07-26 | 1994-03-23 | 日本電気株式会社 | 移動通信システム |
JPS63108251U (es) * | 1986-12-27 | 1988-07-12 | ||
US4851104A (en) * | 1987-02-27 | 1989-07-25 | General Signal Corporation | Instrument for potentiometric electrochemical measurements |
FR2612029B1 (fr) * | 1987-03-03 | 1989-05-12 | Connan Jean Louis | Dispositif pour la realisation de la fonction " mains-libres " dans un poste telephonique, associant les fonctions de commutation de gain et d'annulation d'echo |
US4741018A (en) * | 1987-04-24 | 1988-04-26 | Motorola, Inc. | Speakerphone using digitally compressed audio to control voice path gain |
US4843621A (en) * | 1987-04-24 | 1989-06-27 | Motorola, Inc. | Speakerphone using digitally compressed audio to detect acoustic feedback |
DE3810068A1 (de) * | 1988-03-25 | 1989-10-05 | Telefonbau & Normalzeit Gmbh | Verfahren zur erkennung von sprachsignalen |
FR2636797B1 (fr) * | 1988-09-16 | 1990-11-09 | Sgs Thomson Microelectronics | Circuit integre pour poste telephonique avec detecteur d'enveloppe de signal |
US5007046A (en) * | 1988-12-28 | 1991-04-09 | At&T Bell Laboratories | Computer controlled adaptive speakerphone |
US5199064A (en) * | 1990-12-03 | 1993-03-30 | Advanced Micro Devices, Inc. | Fully-integrated telephone unit |
DE4130045A1 (de) * | 1991-09-10 | 1993-03-18 | Standard Elektrik Lorenz Ag | Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes |
GB2278984A (en) * | 1993-06-11 | 1994-12-14 | Redifon Technology Limited | Speech presence detector |
FI108830B (fi) * | 1993-12-23 | 2002-03-28 | Nokia Corp | Menetelmä ja laite kaiun vaimentamiseksi puhelinlaitteessa |
US6535604B1 (en) | 1998-09-04 | 2003-03-18 | Nortel Networks Limited | Voice-switching device and method for multiple receivers |
AU3188300A (en) * | 1999-03-15 | 2000-10-04 | Vocaltec Communications Ltd. | Echo suppression device and method for performing the same |
GB2375688B (en) * | 2001-05-14 | 2004-09-29 | Motorola Ltd | Telephone apparatus and a communication method using such apparatus |
DE602005008914D1 (de) | 2005-05-09 | 2008-09-25 | Mitel Networks Corp | Verfahren und System zum Reduzieren der Trainingszeit eines akustischen Echokompensators in einem Vollduplexaudiokonferenzsystem durch akustische Strahlbildung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL267461A (es) * | 1960-10-04 | 1900-01-01 | ||
GB979825A (en) * | 1962-03-09 | 1965-01-06 | Gylling & Co Ab | Amplifier for two way speech transmission |
GB1261521A (en) * | 1968-02-05 | 1972-01-26 | Post Office | Improvements in or relating to telecommunication systems |
US3751602A (en) * | 1971-08-13 | 1973-08-07 | Bell Telephone Labor Inc | Loudspeaking telephone |
FR2255762B1 (es) * | 1973-12-21 | 1976-07-23 | Ibm France | |
US3970786A (en) * | 1974-06-27 | 1976-07-20 | Stromberg-Carlson Corporation | Loudspeaking telephone with improved receive sensitivity |
CA996692A (en) * | 1974-12-12 | 1976-09-07 | Russell W. Brown | Digital control of a loudspeaking telephone system |
DE2651688A1 (de) * | 1976-11-12 | 1978-05-24 | Siemens Ag | Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete |
JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
US4465902A (en) * | 1982-10-08 | 1984-08-14 | Zenith Electronics Corporation | Digital space phone system |
-
1983
- 1983-03-01 GB GB08305572A patent/GB2137458B/en not_active Expired
-
1984
- 1984-02-27 AU AU25056/84A patent/AU2505684A/en not_active Abandoned
- 1984-02-28 DE DE8484102045T patent/DE3471221D1/de not_active Expired
- 1984-02-28 EP EP84102045A patent/EP0120325B1/de not_active Expired
- 1984-02-29 US US06/584,579 patent/US4560840A/en not_active Expired - Fee Related
- 1984-03-01 BE BE2/60356A patent/BE899042R/fr not_active IP Right Cessation
- 1984-03-01 JP JP59039697A patent/JPS59210758A/ja active Pending
- 1984-03-01 ES ES530194A patent/ES530194A0/es active Granted
Also Published As
Publication number | Publication date |
---|---|
GB2137458A (en) | 1984-10-03 |
EP0120325A1 (de) | 1984-10-03 |
GB2137458B (en) | 1986-11-19 |
JPS59210758A (ja) | 1984-11-29 |
GB8305572D0 (en) | 1983-03-30 |
AU2505684A (en) | 1984-09-06 |
EP0120325B1 (de) | 1988-05-11 |
DE3471221D1 (en) | 1988-06-16 |
BE899042R (fr) | 1984-09-03 |
US4560840A (en) | 1985-12-24 |
ES530194A0 (es) | 1985-03-16 |
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