IT8320047A0 - Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa. - Google Patents
Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa.Info
- Publication number
- IT8320047A0 IT8320047A0 IT8320047A IT2004783A IT8320047A0 IT 8320047 A0 IT8320047 A0 IT 8320047A0 IT 8320047 A IT8320047 A IT 8320047A IT 2004783 A IT2004783 A IT 2004783A IT 8320047 A0 IT8320047 A0 IT 8320047A0
- Authority
- IT
- Italy
- Prior art keywords
- procedure
- useful signals
- related circuitry
- video intercom
- wire video
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/186—Video door telephones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
- Photoreceptors In Electrophotography (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20047/83A IT1160803B (it) | 1983-03-11 | 1983-03-11 | Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa |
EP84102363A EP0121757A1 (en) | 1983-03-11 | 1984-03-05 | A method for processing useful signals in a four-wire videointerphone and relative circuitry |
ES530371A ES8501184A1 (es) | 1983-03-11 | 1984-03-07 | Circuito para tratar senales utiles en un video-interlocutor de cuatro conductores. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20047/83A IT1160803B (it) | 1983-03-11 | 1983-03-11 | Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa |
Publications (3)
Publication Number | Publication Date |
---|---|
IT8320047A0 true IT8320047A0 (it) | 1983-03-11 |
IT8320047A1 IT8320047A1 (it) | 1984-09-11 |
IT1160803B IT1160803B (it) | 1987-03-11 |
Family
ID=11163397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20047/83A IT1160803B (it) | 1983-03-11 | 1983-03-11 | Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0121757A1 (it) |
ES (1) | ES8501184A1 (it) |
IT (1) | IT1160803B (it) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0230473B1 (en) * | 1985-06-25 | 1994-02-09 | Matsushita Electric Works, Ltd. | Monitoring device applying noctovision for a doorphone system |
IT1294377B1 (it) * | 1997-04-30 | 1999-03-24 | Bitron Spa | Sistema di connessione elettrica per impianti citofonici e/o videocitofonici. |
CN103248968B (zh) * | 2013-05-21 | 2016-04-27 | 广东安居宝数码科技股份有限公司 | 楼宇传呼的对讲装置、层间设备及系统 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1926314A1 (de) * | 1969-03-07 | 1970-11-26 | Heider Gmbh | Schaltungsanordnung fuer kombinierte Tuersprech- und OEffneranlagen in Mehrwohnungshaeusern |
FR2494064B1 (fr) * | 1980-11-12 | 1987-10-23 | Pfister Marcel | Systeme d'appel selectif pour installations de sonnerie et autres commandes a distance |
IT1165528B (it) * | 1980-12-15 | 1987-04-22 | Urmet Spa | Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno |
-
1983
- 1983-03-11 IT IT20047/83A patent/IT1160803B/it active
-
1984
- 1984-03-05 EP EP84102363A patent/EP0121757A1/en not_active Ceased
- 1984-03-07 ES ES530371A patent/ES8501184A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0121757A1 (en) | 1984-10-17 |
IT1160803B (it) | 1987-03-11 |
IT8320047A1 (it) | 1984-09-11 |
ES530371A0 (es) | 1984-11-01 |
ES8501184A1 (es) | 1984-11-01 |
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