■ Luma Key
Luma Key consists of one video source containing the video
image that will be stacked on top of the background.
All of the black areas defined by the luminance in the video
signal will be made transparent so that the background can be
revealed underneath.
So, the final composition does not retain any black from the
graphic because all of the black parts have been cut out of the
image.
■ Chroma Key
In a Chroma Key two images are combined using a special
technique and a color from one image is removed, revealing
another image behind it. Chroma Key is commonly used for
weather broadcasts, where the meteorologist appears to be
standing in front of a large map. In the studio the presenter is
actually standing in front of a blue or green background. This
technique is also referred to as color keying, color-separation
overlay, green screen, or blue screen.
■ CUT and AUTO
CUT performs a simple immediate switch between Program
and Preview. The selected transition WIPE, MIX or FADE is not
used.
AUTO performs an automated switch between Program and
Preview. The selected transition WIPE, MIX or FADE will also
be used.
■ T-Bar Manual Transition System
User can do the transition from the current Program source to
the selected Preview source. The selected transition effects will
work meantime.
When the T-Bar has travelled from B-BUS to A-BUS the
transition between sources is complete. The T-Bar has
indicators next to it which light when the transition is complete.
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