SW-D7000U, 9CH. COLOR VIDEO MULTIPLEXER
28 JVC PROFESSIONAL, IMAGING PRODUCTS
The
SW-D7000U
offers motion detection capabilities, including built-in Activity Detection. Activity
detection is used to adjust the rate at which cameras are recorded and can activate an output relay to
cause automatic external actions such as speed change on the VCR, or floodlights, or audio
announcements and so on.
3.5.1
ACTIVITY DETECTION
Activity detection simply looks for changes in the luminance in various selected areas of the
screen, and if changes are above a set threshold (sensitivity) then the activity detector interprets
that to be activity. Typically, activity detection is used to detect activity in crowded areas, where
activity is not the result of intruders and where human traffic is normal and expected.
If activity is detected the
SW-D7000U
will automatically change recording speed according to its
programmed settings. If a relay has been programmed to be activated, then it will respond as
programmed until the activity ceases.
Indicators:
If enabled in programming, the indicator ‘
M
’ will appear in each camera scene whenever activity
motion has been detected. The indicator is not present on full-screen analog displays. This
motion indicator will stay on each active camera’s display for at least 2 seconds after the motion
has ceased.
If alarm input is activated by one of the
SW-D7000U
internal motion detector channels, the unit
will react in exactly the same way as for any other external sensor activating that alarm input.
The system does not differentiate between input from another alarm sensor and the input
activated by the link from the internal motion detection.
3.6
SPECIAL FUNCTIONS
3.6.1
VIDEO LOSS
Indication:
LED on front panel, with on-screen display of
"V"
in each affected cameo of the multi-screen
display and
‘VDL’
on corresponding full-screen displays. An additional indication in the form of
an LED is provided on the front panel atop the Alarm key. This LED will flash on and off on video
loss detection of any camera input.
Further indication of video loss can be programmed. A relay can be closed whenever video loss
is present, and the buzzer can be activated during video loss.
Video Loss action in Live mode:
Monitor-A:
If the camera is being displayed at the time that video loss occurs, the camera
image will be frozen. However, if sequencing is in progress, the display will be
blanked when it is switched to a camera experiencing video loss.
Monitor-B:
The Monitor-B display cannot freeze images, and so the display will always be
blanked while a camera with video loss is selected.
Video Loss action in RECORD Mode:
When video loss is detected, the affected camera is temporarily removed from the record list,
and the coded digital data recorded with each field will be updated to indicate a video loss
situation on the affected camera. This video loss status is then shown during Playback. The
SW-D7000U
continues to monitor cameras that have video loss and will automatically restore the
cameras when video loss ceases.
