THOMSON GRASS VALLEY KayakDD-1, User Manual

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KayakDD - Digital Production Switcher
2.8 Resource Sharing and Point Of Use
The KayakDD system can share some resources for use at different locations. The
location where a resource is being used is called a point of use.
The 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 KayakDD system has divided the parameters controlling
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 KayakDD system point of use.
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 pattern, adjusting softness at one point of
use will not affect the other’s softness settings. However, changing the pattern shape
affects both locations.
2.9 Transitions
A transition is a change from one image to another. The KayakDD system supports
three basic types of transitions:
•
Cut
•
Mix
•
Wipe
•
DPM (optional)
A transition can be applied to the entire picture, or to only the background
or keyed elements of the picture, and can include multiple elements.
2.9.1 Cut
A cut is an instantaneous switch from one image to another (between successive video
fields or frames). The simplest type is a hot cut , accomplished by selecting a different
source on a bus feeding an M/E output. This only changes that bus’s contribution to
the output, and does not change what elements may be involved in the output (the
same buses are involved).
The KayakDD system also provides cut transitions, where the elements involved in a
composite can be changed instantaneously. Different buses can be included or
excluded, causing changes in the resulting composite image. Background cut
transitions on The M/E are first selected on the Background B bus to allow previewing
the upcoming picture before it is cut “On Air”.
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