Luminance and linear keying operations – Tektronix Grass Valley 3000 User Manual
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Section 4— Switcher Operations
Luminance and Linear Keying Operations
Keys enable you to insert one picture into another to create a
composite effect. For example, you may want to add a caption to
a scene. For more information about keying, refer to Section 3:
Switcher Concepts.
To create a luminance or linear key, do the following:
1.
Select
Key 1
on the M/E 1 Transition Subpanel.
2.
Select the Title 1 crosspoint button on the Key 1 Bus. When
you select a crosspoint, Key Memory automatically recalls the
key type and the adjustments last used with that crosspoint.
3.
Press
AUTO SELECT KEY
on the M/E 1 Keyers Subpanel
to
create a key using both the fill and the external key source
assigned to the crosspoint
1
. Selecting
VIDEO KEY
produces a
self key using the fill video assigned to the crosspoint to both
key from and fill with.
4.
Select
LUM KEY
or
LIN
(linear)
KEY
. Note that
LUM KEY
is often
used for video self keys, and
LINEAR KEY
is typically used
when keying from anti-aliased graphics, characters, or digital
effects images that provide an external keying signal in
addition to their fill video.
1. A key from the video portion of the Title will result if no key is assigned to Title 1. This is done in the
Config/Inputs/Map Inputs Menu.