Title:
VIDEO INTERPHONE SYSTEM
Document Type and Number:
Japanese Patent JP2001045469
Kind Code:
A
Abstract:
To provide an excellent video interphone system to which a plurality of video output devices can be connected and which can arrange the devices at any place on the system.
This video interphone system is provided with a doorphone slave unit 6 with a camera, an interphone master unit 1 with a monitor television set connected through a pair-wire signal line L and interphone sub master units 2 to 4 with a monitor television set connected to the unit 1 through the line L, the unit 1 and the units 2 to 4 are provided with high impedance video output circuits 1-1 to 4-4, and also, an indoor camera 5 having a high impedance video output can be connected to the line L.
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Inventors:
IWABUCHI KOUTA
ASAHIDA MASAHIRO
ASAHIDA MASAHIRO
Application Number:
JP21292499A
Publication Date:
February 16, 2001
Filing Date:
July 27, 1999
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
H04N7/18; H04M9/00; H04M9/08; (IPC1-7): H04N7/18; H04M9/00; H04M9/08
Attorney, Agent or Firm:
Junji Ando (1 person outside)