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DVR CARDS |
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Main
Functions
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Division
Display - 1,4,6,9,12,16
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Motion
Detection
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Record
Reservation
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Over
Writing Function
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System
Watch Dog Function
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Quick
and Easy Search
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Remote
Access - LAN, PSTN,
TCP-IP
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Pan / Tilt
/ Zoom
Control
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Digital
Analog
 
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Clause
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Details
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Digital
Video Recording System
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Video
Tape Recording System
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Function
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Recording
method
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Digital
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Analog
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Recording
medium
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Hard
Disk Drive
-Semi permanent
-No
more management expenses
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Video
Tape
-Repeat
record occurs to bad quality image
-Troublesome
in management
and expenses
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Image
quality
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Good
recording quality
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Bad
recording quality
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Multiplex
record
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Equipped
it's own body
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Need
another equipment (Frame Switcher, Quad, Multiplexer, VTR etc...)
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Screen
division
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Equipped
it's own body
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Need
another equipment (Quad,
8 screen division, 12 screen division etc)
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Frame/sec
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From
1Frame/sec to 30 Frame / sec
Enough
to realize live video image
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Commonly
1Frame/3sec
(Static
video image)
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Convenience
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Researching
|
Simple
-Research
the remote by time,
camera,
event at once.
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Inconvenience
-Researching
the whole tape's contents
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Image
data out put
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Possible
-Printer
out put
-Remote
transmission
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Impossible
-Necessary
needs another equipment
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Data
storage
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Simple
-Hard
Disk Drive
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Complication
-Management
expenses
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Economic
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Maintenance
cost
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NONE
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High
cost
-Video
tape purchase
-The
cost of storage and management
-The
cost of exchanging VCR
as HEAD ware out
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Up-grade
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Up-Gradable according to
technical development
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Impossible:
The limit of analog technical development
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Institution
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Low
cost
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High
cost
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