Grass Valley Kayak HD v.6.9.3 - Manual (Page 49)

Kayak — User Manual 49
Transition
FAM transitions first fade a new picture to full intensity and then fade the
old picture out, but both full intensity pictures are mixed together to the
output during the transition. The resulting signal is clipped at white level
to prevent generating illegal video.
Wipes
A wipe is a transition from one picture to another in which the edge of a
shape moves across the screen, revealing the new picture. Wipe transitions
can be applied to backgrounds, to keys, or to both simultaneously. A wipe
transition shape can be selected from a variety of patterns, and these pat-
terns can be adjusted in several ways (position, aspect ratios, edge attri-
butes, etc.).
Each Kayak M/E has two separate transition wipe systems, each of which
can be assigned a different wipe pattern and be adjusted independently.
These systems can each use one of the two available complex wipe pattern
generators with advanced capabilities. It is also possible to combine these
wipes to create extremely complicated wipe transition shapes, and gener-
ally this is used only by advanced operators. Utility bus video signals can
also be used to generate a custom pattern for a wipe transition or other pur-
poses.
Other Wipe Pattern Generator Uses
Wipe pattern generator circuitry can be used for purposes that do not
involve transitions. Each Kayak M/E has the two complex wipe pattern
generators described above, and each of its four Keyers also has a simple
pattern generator and a box pattern generator, making a total of six wipe
generators. These pattern generators can also be used for Preset Pattern,
Masking, and Matte Washes.
Preset Black
Preset Black is a special type of transition, where the picture transitions to
black, and then transitions out of black to the new picture. Preset Black is
really two transitions, one to and one from black, and so requires two oper-
ator commands to complete. Preset Black can be used with any transition
type (cut, mix, or wipe). The entire picture goes to black, even if all the tran-
sition elements involved in the picture were not selected.
Fade to Black
The Fade to Black control in the DSK allows the Program output of the
switcher to be brought down to black at a predetermined transition rate.