Key Memory - Sony MVS-8000X System User Manual

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
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 the next time the same cross-point button is
selected these settings are recalled automatically.
There are two modes for key memory: simple mode and full mode.
The parameters stored in each mode are as follows.
Simple mode: key type, clean mode (including the plane setting for chroma
keying), key position, key inversion, and adjustment values for the
particular key type (Clip, Gain, Density, Filter, etc. This includes color
vector key, wipe pattern key, key wipe pattern key, and chroma key.
Masked area (box)
Background mask
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Overview