Grass Valley Karrera Video Production Center v.4.0 - Manual (Page 252)

252 KARRERA — User Manual
Section 7 — Advanced Operations
Super Additive
“Super Additive” mode replaces the key signal of the selected source with
a full field of black, while in the additive key mode. The opacity of the fine
and semi-transparent video is greatly increased based on its luminance.
This is very much a “fashion-statement” kind of keying which has been
very popular with entertainment shows. Additionally, Super Additive
mode is very useful for keying over credits and other text because it
brightens and increases transparency.
When Additive Key mode is On, the Super Add button is displayed
( Figure 132 ) and defaults to Off. Touch the Super Add button to turn it
On/Off.
The Super Add button is also returned to “Auto” state by selecting or re-
selecting a Keyer Mode button.
Figure 132. Keyer, Mode Menu—Additive Key/Super Add Button
From the Control Panel
In the Multi-Function area of the Control Panel, the Addv Key button is pro-
vided. For Super Add, DPOP the Addv Key button ( Addv Key button changes
from high tally white to high tally orange).