IT1160803B - 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
IT1160803B
IT1160803B IT20047/83A IT2004783A IT1160803B IT 1160803 B IT1160803 B IT 1160803B IT 20047/83 A IT20047/83 A IT 20047/83A IT 2004783 A IT2004783 A IT 2004783A IT 1160803 B IT1160803 B IT 1160803B
Authority
IT
Italy
Prior art keywords
procedure
door phone
useful signals
related circuitry
video door
Prior art date
Application number
IT20047/83A
Other languages
English (en)
Other versions
IT8320047A1 (it
IT8320047A0 (it
Inventor
Pier Antonio Brasi
Original Assignee
Comelit Cie Elettronica Italia
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Comelit Cie Elettronica Italia filed Critical Comelit Cie Elettronica Italia
Priority to IT20047/83A priority Critical patent/IT1160803B/it
Publication of IT8320047A0 publication Critical patent/IT8320047A0/it
Priority to EP84102363A priority patent/EP0121757A1/en
Priority to ES530371A priority patent/ES530371A0/es
Publication of IT8320047A1 publication Critical patent/IT8320047A1/it
Application granted granted Critical
Publication of IT1160803B publication Critical patent/IT1160803B/it

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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Photoreceptors In Electrophotography (AREA)
IT20047/83A 1983-03-11 1983-03-11 Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa IT1160803B (it)

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 ES530371A0 (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 IT8320047A0 (it) 1983-03-11
IT8320047A1 IT8320047A1 (it) 1984-09-11
IT1160803B true 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) ES530371A0 (it)
IT (1) IT1160803B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6121886A (en) * 1985-06-25 1987-01-30 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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
ES8501184A1 (es) 1984-11-01
EP0121757A1 (en) 1984-10-17
ES530371A0 (es) 1984-11-01
IT8320047A1 (it) 1984-09-11
IT8320047A0 (it) 1983-03-11

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