IT8521356A0 - Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito. - Google Patents
Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito.Info
- Publication number
- IT8521356A0 IT8521356A0 IT8521356A IT2135685A IT8521356A0 IT 8521356 A0 IT8521356 A0 IT 8521356A0 IT 8521356 A IT8521356 A IT 8521356A IT 2135685 A IT2135685 A IT 2135685A IT 8521356 A0 IT8521356 A0 IT 8521356A0
- Authority
- IT
- Italy
- Prior art keywords
- circuit
- telephone set
- hands
- reception paths
- speech transmission
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title 1
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Analogue/Digital Conversion (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08416415A GB2161047B (en) | 1984-06-28 | 1984-06-28 | Improvements in telephone instruments |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8521356A0 true IT8521356A0 (it) | 1985-06-28 |
IT1206478B IT1206478B (it) | 1989-04-27 |
Family
ID=10563086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8521356A IT1206478B (it) | 1984-06-28 | 1985-06-28 | Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito. |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS6115451A (it) |
AU (1) | AU4346785A (it) |
DE (1) | DE3522915A1 (it) |
ES (1) | ES8609854A1 (it) |
FR (1) | FR2566980A1 (it) |
GB (1) | GB2161047B (it) |
IT (1) | IT1206478B (it) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4724540A (en) * | 1986-09-02 | 1988-02-09 | Motorola, Inc. | Speakerphone with fast idle mode |
GB2197166A (en) * | 1986-11-07 | 1988-05-11 | Storno As | Controlling gain in speech-controlled telephones |
EP0290952B1 (de) * | 1987-05-15 | 1992-11-04 | Alcatel SEL Aktiengesellschaft | Schaltungsanordnung zur Sprachsteuerung für ein Endgerät der Nachrichtentechnik |
CA1291837C (en) * | 1987-07-15 | 1991-11-05 | Juro Ohga | Electronic telephone terminal having noise suppression function |
US4879745A (en) * | 1988-10-12 | 1989-11-07 | Ibm Corporation | Half-duplex speakerphone |
US4901346A (en) * | 1988-12-28 | 1990-02-13 | American Telephone And Telegraph Co. | Computer controlled speakerphone for adapting to a communication line |
US4887288A (en) * | 1988-12-28 | 1989-12-12 | American Telephone And Telegraph Company | Self calibration arrangement for a voice switched speakerphone |
US5007046A (en) * | 1988-12-28 | 1991-04-09 | At&T Bell Laboratories | Computer controlled adaptive speakerphone |
US4959857A (en) * | 1988-12-28 | 1990-09-25 | At&T Bell Laboratories | Acoustic calibration arrangement for a voice switched speakerphone |
KR920017511A (ko) * | 1991-02-28 | 1992-09-26 | 빈센트 죠셉 로너 | 집적된 스피커폰 회로 및 스피커폰용 직렬 포트 인터페이스 |
DE4130045A1 (de) * | 1991-09-10 | 1993-03-18 | Standard Elektrik Lorenz Ag | Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes |
CA2052351C (en) * | 1991-09-27 | 2000-05-23 | Gordon J. Reesor | Telephone handsfree algorithm |
DE4416550C1 (de) * | 1994-05-10 | 1995-09-21 | Siemens Ag | Schaltungsanordnung für Fernsprechendgeräte mit dem Leistungsmerkmal "Lauthören" |
US6978009B1 (en) | 1996-08-20 | 2005-12-20 | Legerity, Inc. | Microprocessor-controlled full-duplex speakerphone using automatic gain control |
JPH10304030A (ja) * | 1997-04-28 | 1998-11-13 | Saitama Nippon Denki Kk | 携帯電話装置 |
FR3028375B1 (fr) * | 2014-11-07 | 2017-11-24 | Euro Prot Surveillance | Procede de communication vocale, interface audio d'un systeme d'alarme social et systeme d'alarme social |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
GB2122851B (en) * | 1982-06-10 | 1986-03-19 | Standard Telephones Cables Ltd | Loudspeaking telephones |
-
1984
- 1984-06-28 GB GB08416415A patent/GB2161047B/en not_active Expired
-
1985
- 1985-06-11 AU AU43467/85A patent/AU4346785A/en not_active Abandoned
- 1985-06-27 ES ES544628A patent/ES8609854A1/es not_active Expired
- 1985-06-27 JP JP60139218A patent/JPS6115451A/ja active Pending
- 1985-06-27 DE DE19853522915 patent/DE3522915A1/de not_active Withdrawn
- 1985-06-28 FR FR8509903A patent/FR2566980A1/fr active Pending
- 1985-06-28 IT IT8521356A patent/IT1206478B/it active
Also Published As
Publication number | Publication date |
---|---|
AU4346785A (en) | 1986-01-02 |
GB2161047B (en) | 1987-09-16 |
JPS6115451A (ja) | 1986-01-23 |
DE3522915A1 (de) | 1986-01-09 |
GB2161047A (en) | 1986-01-02 |
GB8416415D0 (en) | 1984-08-01 |
FR2566980A1 (fr) | 1986-01-03 |
ES8609854A1 (es) | 1986-07-16 |
IT1206478B (it) | 1989-04-27 |
ES544628A0 (es) | 1986-07-16 |
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