Grass Valley 1200 Operation Manual - Manual (Page 29)

2-11
Concepts You’ll Need to Know
Z-Key™ Depth
The Depth option enables the switcher’s two effects keyers to key
a depth key input from a Grass Valley digital picture manipulator
over a switcher background. Depth keying creates an effect in
which one key layer appears closer to the viewer than a second
key layer does, and one key layer can “slice” through the other.
The Depth option also works with ordinary key signals. You can
assign different depth values to the two M/E keys and record
them. Then you can play the composite effect back and insert
additional key layers between the original two layers. The keys
cannot be made to intersect, and they may not create the visual
illusion of depth the way a true depth key does, but you can
composite multi-layered graphics with layers that slide in and out
between other layers.
In order to record a depth key, a 10-bit digital recorder with two
channels (video and key) is required to retain depth information.
E-MEM ® Effects Memory
E-MEM Effects Memory provides a way of storing switcher effects
for later use. With E-MEM you can set up an effect and “learn” a
snapshot of it into memory. Later, you can recall that effect at the
touch of a button, and the switcher will immediately return to the
state it was in when the effect was learned.
You can also learn automatic transitions as part of a stored effect.
When you learn an auto transition with an effect into a register,
recalling that register recalls the effect first, and then starts the
stored transition automatically.
The E-MEM system includes 20 effects storage registers arranged
in two “banks” of ten registers each. E-MEM register contents can
be saved to disk using the floppy drive and menu display.