Grass Valley Zodiak v.6.0 Mar 15 2006 - Manual (Page 119)

Zodiak — User Manual 119
2.5-M/E and 3-M/E Main Panel
Matte Fill Button
The Matte Fill button determines what signal will be used as the key fill by
the keyer. When off, the key fill signal currently selected on the fill bus will
be used. When on, a matte signal will be used. Selecting the
Matte Fill button
automatically delegates the Matte menu in the Menu panel. Matte adjust-
ments can only be made through this menu. Refer to
Matte Menus on
page 292 .
Video Key Button
The Video Key button determines what signal the keyer will use to cut the
hole in the background. When off, the key signal (if defined) of the source
selected on the cut bus will be used (the normal setting for a Linear key).
When on, the video signal of the selected source will be used (the normal
setting for a luminance key). If a source does not have a defined key signal,
when
Video Key is off the keyer will produce a full raster key signal, which
is useful when the image is manipulated with a Transform Engine or
external DVE.
Note Video Key is generally used only when the source's key signal is not appro-
priate. This would be the case for a character generator producing a wide key
(for a border or shadow) which the operator decides to matte fill. In this case,
the video signal defines the character area and usually produces a better
result.
Key Split Button
Each key source button normally controls crosspoints on two buses (key
cut, key fill) at the same time. The
Key Split modifier button is used to select
a different key cut signal to use with the currently selected key fill signal.
When Key Split is held down, the key bus lights the currently selected key
cut source button. Selecting a different source changes only the key cut bus
source, and leaves the key fill bus source unchanged. The
Key Split button
lights whenever the key is split. Also, while the Key Split button is held
down, the shift mode is temporarily forced to Latched to aid in selecting a
different key cut from shifted sources with one hand.
When Key Split is released, the Key source selector row immediately returns
to showing the key fill source and the Shift mode reverts to that defined in
User Prefs.
To cancel a key split, note the key fill source when Key Split is not held
down, then hold down Key Split and select that same source for use as the
key cut.