Grass Valley Karrera Video Production Center v.4.0 - Manual (Page 57)

KARRERA — User Manual 57
MEs and Keyers
Access Keyer Menu and Delegate Keyer
On the Menu Panel, touch Keyer , Mode . You can also double press the Chr
button in the Multi-Function area to access this menu. Delegate the keyer
you wish to set up on the left side of the screen, then touch the
Chroma Key
Mode button ( Figure 22 ).
Figure 22. Keyer Chroma Menu, Pri Suppress Controls
Primary Suppression
Primary suppression is the most critical chroma key parameter, and the
easiest to set. Auto Setup should take care of this, but manual adjustments
can be made if desired. If primary suppression is set wrong, however, it will
be impossible to achieve a good chroma key with the other controls.
Primary Suppression should be set while looking at the foreground. Ideally
the backing color will appear as a small dot on the vector scope and a per-
fectly flat line on the waveform display, but this never occurs due to set
lighting variations, shadows, etc. This means you will need to pick the best
suppression for the overall look of the key.
1. Touch the stage 1 Pri Suppress data pad, if necessary, to activate these
controls ( Figure 22 ).