Grass Valley Kalypso User Manual V.15.0 - Manual (Page 76)

76 Kalypso — User Manual
Section 2 — Concepts
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 Kalypso 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.
Mix Through Video
A Mix Through Video transition is a special mix transition that incorpo-
rates a third intermediate video source. This type of transition can mix from
one video source, through a matte or Utility bus video source, to the final
video source, all as one transition.
Non-Additive Mix, Full Additive Mix
Non Additive Mix (NAM) and Full Additive Mix (FAM) are special mix
transitions that the Kalypso system supports besides normal crossfade
transitions. Picture elements in NAM and FAM transitions are composited
differently through the time of the transition(
Figure 53 ).
Figure 53. Normal, NAM and FAM Mixes
NAM transitions pass only the brightest regions of each picture to the
output. During the first half of a NAM transition the original picture retains
its original intensity while the next picture mixes to full intensity. Brighter
areas in the new picture replace any corresponding darker areas of the pre-
vious picture. During the second half of a NAM transition the previous
picture mixes out of the darker areas of the new picture. FAM transitions
also 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 gen-
erating illegal video.
0618_00_68_r1
Crossfade
Transition
Start End
Midpoint
Current
Picture
Picture
Intensity
Next
Picture
Current
Picture
Next
Picture
NAM, FAM
Transition
Start End
Midpoint