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Patent Searching and Data


Title:
VIDEO DOORPHONE SYSTEM
Document Type and Number:
Japanese Patent JP2007006416
Kind Code:
A
Abstract:

To perform digital transmission of video signals from a slave unit to a master unit using a two-wire cable.

A slave unit 1 comprises a packet converting circuit 117 for converting a digital video signal from an imaging apparatus 11 into a packet and a modulation means 121 for performing digital modulation upon the packet in an FSK scheme and providing a transport packet, and the transport packet is transported through a two-wire cable 3 to a master unit 2. The master unit 2 comprises a demodulation means 221 for demodulating the received transport packet as a packet and a packet converting circuit 235 for converting the packet into a digital video signal, and a video image from the slave unit 1 is displayed on a video display device 23.


Inventors:
HAYASHI YOSHIHARU
Application Number:
JP2005000187380
Publication Date:
January 11, 2007
Filing Date:
June 27, 2005
Export Citation:
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Assignee:
SHARP KK
International Classes:
H04N7/18; H04M9/00
Attorney, Agent or Firm:
Tai Oshima
Shuzo Hinode
Seiji Goto
Junko Ohara