Title:
VIDEO INTERPHONE SYSTEM FOR MULTIPLE DWELLING HOUSE
Document Type and Number:
Japanese Patent JP3657637
Kind Code:
B2
Abstract:
PURPOSE: To provide a video interphone system for multiple dwelling house in which a video signal is sent without use of a coaxial cable, the number of wires is reduced and wiring installation is facilitated by non-polarity design.
CONSTITUTION: The system is provided with a lobby interphone 1 installed at a common entrance and provided with a video camera, a housing interphone installed to each house with a monitor television unit 6 added thereto, and a video control panel 3 receiving a video signal from the video camera of the lobby interphone 1 and supplying a television drive power supply to the monitor television unit 6 of the housing interphone 4 installed to each house. The video control panel 3 supplies a video image power supply superimposing signal obtained by superimposing a television drive power supply onto the video signal sent from the video camera of the lobby 1 to the monitor television unit 6 through video lines 9a in pairs.
Inventors:
Akihiko Hasegawa
Inukai Tatsuo
Kazuhiko Kono
Inukai Tatsuo
Kazuhiko Kono
Application Number:
JP31738994A
Publication Date:
June 08, 2005
Filing Date:
December 20, 1994
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
H04N7/18; H04M1/65; H04M9/00; (IPC1-7): H04N7/18; H04M1/65; H04M9/00
Domestic Patent References:
| JP2268056A | ||||
| JP5207166A |
Attorney, Agent or Firm:
Hiroyuki Nakai
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