GRASS VALLEY Kayak, Руководство пользователя, Страница: 46 / 558

46 Kayak — User Manual
Section 2 — Concepts
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 Kayak 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
.
Mix
A mix is a transition from one picture to another where the new picture
fades in as the existing picture fades out. During a standard mix transition
a superimposition of both pictures, each at a lower intensity, is visible.
The Kayak system allows mixing from one background to another and to
mix up to four separate keys on or off over a background. Background and
key mixes can be done separately or simultaneously.
Full Additive Mix
Full Additive Mix (FAM) is a special mix transition that the Kayak system
supports besides normal crossfade transitions. Picture elements in FAM
transitions are composited differently through the time of the transition.
Figure 17. Normal and FAM Mixes
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