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© 2003 Michael J Archer
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Chapter 2 –Configuration
Switches the video signal format (PAL / NTSC) set to PAL for UK systems. Should be set to PAL.
Determines video processing thread CPU priority. When
“Real-time”
position is chosen all procedures
of less priority would be suspended until LJD-Video™ system is active. This mode is applicable if the
standard CPU loading is not higher than 80%. We set to Highest as standard.
Specify the number of skipped fields to enable signal stabilization after commutation procedure. This
parameter is valuable when two or more asynchronous cameras are connected to the system. The result
of this skip fields is that the frame rate recorded will decrease, because the system has to ignore a frame
capture to stabilize the picture. Remember you need to adjust this value for all cards, sometimes you
may find a camera has very bad jumping, this we’ve seen and found the input sync from that camera
was found to be faulty. We do suggest that you can move around the camera inputs in the case of
multiple card systems, to try to give the lowest skip fields, resulting in a better frame rate.
Switches the hardware video filtering (smoothing). Picture is clearer and sharp when filtering is not
selected but the noise level becomes noticeable as well.
Keep this setting enabled, because it reduces size of recording frame while keeping details legible
enough. If recording of slight differences in small details is required (especially when high optical
zoom is used), one may disable this feature to improve quality (sharpness) of details as much as
possible.
TURBO MODE is a special regime that gives the possibility to record video streams around real-time
speed (25 fps in PAL and 30 fps in NTSC). It is available for a configuration where only one camera is
connected to each capture card/s. If you connect more than one camera you will not be able to select
the TURBO MODE. So it is possible to have four cameras at 25fps with a 16 camera system.
The selection between B&W and Colour cameras is by the Icon
which is B&W and
for
colour.
Each card can be only B&W or Colour, so in groups of four channels or camera inputs can you select
what each input is able to support. If you use black and white cameras, the recording data requirement
is half as much as colour.
So for a four camera system, you can only have all colour or all Black & White cameras.
For a Eight camera system, you can have 100% colour 100% Black & White, or 50 – 50 split
And logically for a 12 and 16 you can mix between either. With the 12 camera system having three
cards, and the 16 camera system having four cards respectively.
Intelligent Security & Fire Ltd