Grass Valley Zodiak v.6.0 Mar 15 2006 - Manual (Page 47)

Zodiak — User Manual 47
Transitions
Figure 14. Normal and FAM Mixes
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.
Wipe
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
attributes, etc.).
Each Zodiak M/E has two separate 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 gener-
ators with advanced capabilities. It is also possible to combine these wipes
to create extremely complicated wipe transition shapes, and generally 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 purposes.
Other Wipe Pattern Generator Uses
Wipe pattern generator circuitry can be used for purposes that do not
involve transitions. Each Zodiak 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. 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-
8126_00_24_r0
Crossfade
Transition
Start End
Midpoint
Current
Picture
Picture
Intensity
Next
Picture
Current
Picture
Next
Picture
FAM
Transition
Start End
Midpoint