Abekas AirCleaner, User Manual

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AirCleaner • User Guide 53
4. Operations
Theory of Operation
14.
TIME 53:00 |
After one more second has elapsed (53 seconds in total) the
defocus engine has been switched out of the video pathway. The video output
now displays “normal” unprocessed video (although it is still delayed by 40
seconds, as compared to the video input).
Figure 4-14. Theory of Operation Example: Elapsed time of 53:00 seconds
The scenario illustrated above provides the basic theory of operation for the video
delay inside AirCleaner. There are many other features inside AirCleaner that can be
used to tailor the machine to a particular application. Of course, in addition to
masking out video violations, AirCleaner can also be used to screen out audio
violations.
Not depicted in the scenario above is use of the Defocus Ramp parameter to “ramp
up” and “ramp down” the amount of defocus when switching the defocus engine in
and out of the video pathway. This ramping allows the transition from “normal” video
to the masked, defocused video (and vice-versa) to happen gradually; much like a
video camera going out of focus and back into focus. The result is a much more
realistic and natural visual effect.
If desired, AirCleaner can also be programmed to switch to an auxiliary “safe” video
input feed at the time of violation, rather than using the internal defocus engine.
Furthermore, AirCleaner can be programmed for Two-Screener operation, in which
two separate screening operators work in series inside AirCleaner’s delay pathway.
The audio/video
TAP OUT provides a monitoring point for the second screener to
monitor the output from the first screener. Two-Screener operation provides an extra
measure of security against violations making it to air, since the second screener has
an opportunity to mask out any portion of the violation which the first screener may
have missed.