About additive keyers, Using additive keyer from the menu – Grass Valley Kayenne K-Frame v.7.0 User Manual
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KAYENNE K-FRAME — User Manual
Section 8 — Advanced Operations
About Additive Keyers
In the keyer circuitry of the switcher, unshaped video is processed using a
multiplicative key and shaped video is processed using an additive key. In
the normal course of operation, this is done automatically. Shaped video
can be turned on or off (unshaped video) for a source’s linear key in the Key
Mode pane of the Eng Setup, Source Definition menu (
).
Figure 180. Eng Setup, Source Definition Menu
However, there are instances when manual control is useful:
•
A source’s key is not properly defined and you wish to correct the
shape by overriding the key type, or
•
You wish to key an artistic effect by changing the video to the “incor-
rect” video shaping.
Using Additive Keyer From the Menu
Additive Key
and
Super Add
buttons are provided in the menu for Fixed and
Adjusted Linear and Luma keys so you can override the video shape
selected in the Source Definition menu (changes from Auto to On or Off)
for that source.