Grass Valley Kalypso User Manual V.15.0 - Manual (Page 75)

Kalypso — User Manual 75
Transitions
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. Sep-
arate sets of point of use parameters, however, are maintained for each
Kalypso system point of use (same as Transform Engines described above).
These settings are used only by each individual point 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.
Kalypso systems differ from the Grass Valley 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 Kalypso system duplicates this circuitry
allowing each point of use to have a different edge on the same basic wipe
pattern shape.
Transitions
A transition is a change from one image to another. The Kalypso system
supports three basic types of transitions:
• Cut
• Mix
• Wipe
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. See
Current and Next Stack
on page 78 for information on transitions involving
more than one element.
Cut
A cut is an instantaneous switch from one image to another (between suc-
cessive 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 Kalypso 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 an M/E are first selected on the Back-
ground B bus to allow previewing the upcoming picture before it is cut on-
air.