Grass Valley Zodiak v.6.0 Mar 15 2006 - Manual (Page 405)

Zodiak — User Manual 405
Chroma Key Operating Notes
earlier steps and readjust previous settings to optimize the key. Under-
standing what the chroma key controls do will help you decide what
adjustments are required for your individual situation.
Access Keyer Menu and Delegate Keyer
Press the Keyer Menu panel button, then touch the Mode category selection
button to access the Keyer Chroma menu. You can also double press the Chr
button in the Keyers subpanel 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 284 ).
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 perfectly 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 284 ).