Tektronix Grass Valley 3000 - Manual (Page 162)

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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.