Key Memory - Sony MVS-8000X User Manual

Edge type and key fill/key source position
The key edge modification function has two modes: a
mode ("key drop ON mode") in which the key fill/key
source position moves downward, and a mode ("key drop
OFF mode") in which it does not move downward.
Key drop ON mode: The key fill/key source position
moves downward by eight scan lines or four scan lines.
When a drop border or shadow is selected, it is
possible to apply a border to the top edge of the key.
Key drop OFF mode: The key fill/key source position
does not move. When a drop border or shadow is
selected, it is not possible to apply a border to the top
edge of the key.
In the key drop ON mode, a menu setting selects between
the mode ("4H mode") in which the key fill/key source
position is lowered by four scan lines, and the mode ("8H
mode") in which the key fill/key source position is lowered
by eight scan lines.
When Fine Key is on, the edge width is forced to the range
0.00 to 4.00.
Note that in the following situations, the key drop mode is
forcibly turned on.
• When the edge type is border, outline, or emboss
• When the edge type is normal with soft edge being on
• When Fine Key is on
To fix key fill / key source in key drop off mode
Switch frame delay mode on.
Regardless of the fine key and edge type settings, key fill
and key source are fixed in key drop off mode. In this mode
key image has a one-frame delay.
Notes
This function uses the resizer, and therefore the normal
effect of the setting is not obtained while using DME wipe
or other effect that uses the resizer.
Edge fill
When a border, drop border, or shadow modifier is
selected, you can select a signal to fill these edge effects.
The edge fill may be either the signal from the dedicated
color matte generator, or the signal currently selected on
the utility 1 bus.
In the case of an outline, there is no edge fill signal
selection, because the key fill signal fills the outline, and
the rest of the image remains as the background.
For the emboss effect, in place of the edge fill signal, the
emboss fill matte 1 and emboss fill matte 2 signals are
used.
Masks
A mask is used to inhibit the effect of a key over a part of
the image. This allows parts of the background which
would otherwise be keyed to be protected, or to correct the
key if it is not of the desired shape.
For details of masking operations, see "Masks" (pages
103 and 112).
Key mask and background mask
There are two types of mask: a key mask and a background
mask.
Key mask: This masks out a part of the key, which will
result in the background appearing.
Background mask: This masks out a part of the
background, which will result in the key fill appearing.
Key mask
Background mask
Main mask and subsidiary ("sub") mask
Each keyer allows two masks to be used simultaneously,
and these are referred to as the main mask and the sub
mask. The signal that determines the mask shape and size
is termed the mask source, and different sources are used
for the main mask and sub mask.
Main mask: This uses the signal from the dedicated box
generator provided on each keyer, or the signal from
the dedicated pattern generator as the mask source.
When the box generator is selected, a rectangular mask
is formed. You can adjust the positions of the four
sides of the box separately.
When the pattern generator is selected, you can select
the pattern and apply modifiers.
Sub mask: This uses the wipe generator signal or the
signal selected on the utility 1 bus, as the mask source.
When the wipe generator is selected, the patterns and
the pattern modifiers are the same as in a wipe
transition.

Key Memory

The key memory function allows the keyer settings on
each cross-point button to be automatically stored, so that
Masked
area (box)
91
Overview