GRASS VALLEY zodiak, User Manual

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Zodiak User Manual 41
Resource Sharing and Point Of Use
Resource Sharing and Point Of Use
The Zodiak system can share some resources for use at different locations.
The location where a resource is being used is called a point of use. Different
types of resources are shared differently.
Floating resources (like Chroma Keyers) move between points of use, and
the parameters controlling these resources are considered part of the point
of use. These resources are used at only one point of use at a time. When
the resource floats to the new location, its behavior changes. For example,
A Chroma Keyer set for specific parameters in M/E 1 Key 1 can be assigned
to another keyer and have different settings applied.
Other Zodiak system resources behave differently. For example, wipe
pattern generator resources can be used for an M/E wipe transition, as a
preset pattern, as a mask, or at other points of use. It is also possible to
assign the output of the same wipe pattern generator to different points of
use at the same time.
For efficient operation, the Zodiak system has divided the parameters con-
trolling wipe pattern generators and related utility bus functions into two
categories; shared generator parameters and point of use parameters. The set of
parameters for the shared generator are used by all points of use, so
changing one of these parameters will affect all locations where that wipe
pattern generator is being used at that time. Separate sets of point of use
parameters, however, are maintained for each Zodiak system point of use
(same as Chroma Keyers described above). These settings are used only by
each individual points of use, so changing them will not affect any other
point of use.
For example, a wipe shape (box, circle, etc.) is a generator parameter, but
the softness of the shape’s edges is a point of use parameter. If the same
wipe generator is used by both an M/E wipe transition and a preset pat-
tern, adjusting softness at one point of use will not affect the other’s soft-
ness settings. However, changing the pattern shape affects both locations.
Zodiak systems differ from the Grass Valley Group Model 4000 switchers
in the division between wipe pattern generator and point of use. In the
4000, the edge is created as part of the generator so all points of use have
the same softness and border width. The Zodiak system duplicates this cir-
cuitry allowing each point of use to have a different edge on the same basic
wipe pattern shape.