Chapter 5 — Operation
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VCR Special Effects
Most special video playback features can be used while review-
ing a recording. Field oriented features such as field advance
or still field should work, if the VCR reproduces each video
field accurately. Fast forward will NOT produce a satisfactory
picture.
Video Motion Detection
During recording, the Simplex detects changes in camera video
at each of its camera inputs. It responds to activity at any
camera by increasing the rate at which that camera is encoded
(recorded); but the Simplex does not produce an alarm output
due to activity.
Motion detection is a powerful feature because it greatly in-
creases the efficiency with which cameras are recorded. Mo-
tion detection also helps to ensure that critical site activity is
recorded and displayed to the user.
How Motion Detection Works
The Simplex system continuously scans each camera input for
video. When video is detected, the unit captures one video
field in digital memory. It then measures the value of up to
192 target pixels in the picture and stores the results for refer-
ence. During the next scan, the Simplex measures the target
pixels again. The new and old target values are compared. If
the target values differ significantly, the Simplex assumes that
motion has occurred.
The goal of motion detection is to prioritize cameras for re-
cording. The Simplex gives priority to cameras where motion
is detected by sampling them more frequently. The result is
that cameras with motion update faster. This technique allows
the system to operate at highest efficiency while ensuring that
important events are recorded.
Motion Detection Setup
By default, all 192 motion detection targets are turned on for
each camera input. You can tailor motion detection for each
camera input by turning any unneeded targets off. Use the
motion setup screen to change target settings. See
Motion Setup
for details.
NOTE: For quad recordings, if you use time-lapse or pause
mode during playback, images may look blocky with
just one field displayed. If you press and hold the FUNC-
TION button, you can see both fields displayed. You
will get better results with a 2-hour playback speed.