Grass Valley Kayenne v.3.0 - Manual (Page 46)

46 KAYENNE — User Manual
Section 2 — Concepts
allow some background to show through the key (watermarks). The level
of the key cut signal determines where and how deeply the hole will be cut
into the background. The intended soft edge and translucency of the key
can then be faithfully reproduced (
Figure 18 ).
Figure 18. Linear Keying
Note The soft edges in the illustrations in this part of the manual are simulated. The
key edges are actually gradients, which allows these edges to blend smoothly
with the background.
Fixed and Adjustable Linear Keys
The Kayenne system supports both fixed and adjustable linear keys. A
fixed linear key uses clip and gain values defined in system configuration
to create the key cut signal. Typically these values are Clip 50% and unity
Gain (equivalent to Clip Hi 100%, Clip Lo 0%). Once fixed linear key values
are defined, these sources can be used easily without the operator having
to set up the key every time it is used.
An adjustable linear key provides the operator limited control over Clip
and Gain (or Clip Hi/Lo) values. This lets the operator fine tune the set-
tings if the normal fixed linear values are not producing a good enough key.
Background Video
Key Cut Key Control
(typically unchanged)
Completed
Linear Key
Key Fill
LOGO LOGO
LOGO LOGO
+
Key Hole in Background
x
Clip
Gain
Invert
0618_00_61
LOGO LOGO
L O G O
L O G O