Section 9.4 background and dsk layers, Section 9.5 selecting sources – NewTek TriCaster 2 Elite (3 RU) User Manual
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SECTION 9.4
BACKGROUND AND DSK LAYERS
The concept of
video layers
is central to understanding how the
Switcher, M/E
and
Transition
controls relate
to one another, and how they combine to form the video seen on
Program
output.
•
The
Background
layer (often shortened to simply ‘BKGD’) is always the base for the video
composition displayed on
Program
output.
•
DSK
(Down Stream K
eyer, or ‘overlay’) layers may appear above (in front of) the
Background
.
DSK
layers are typically used for overlaying graphics, titles, etc., though they may serve other purposes as
well. In addition to BKGD, up to five
additional ‘primary layers’
can contribute to the final
Program
output
at any given moment:
•
Overlay layers (
DSKs
)
are
c
omposed above the
BKGD
layer on output.
DSK 2
appears ‘in front of’
DSK
1
on
Program Output
–
that is, closest to the viewer
–
and so on in order.
•
FTB
(Fade to Black) constitutes a final overlay layer
–
one that obscures all other layers when applied.
Recall, too, that the
BKGD
layer itself is often a composite of sub-layers:
▪
It may include mixed video from both the
Program
or
Preview
rows.
▪
Selecting an
M/E
as source on
Program
or
Preview
can add many sub-layers to the
BKGD
composition,
including the
M/E
’s
primary
Inputs
and dedicated
KEY
layers (which are similar to
DSK
layers but,
being upstream of the main
Switcher
, appear composed in the background layer).
Note: Since M/Es are reentrant, the BKGD layer can at times reach very high numbers of sub-layers.
SECTION 9.5
SELECTING SOURCES
In standard
Switcher
mode, video sources for
PGM
(Program) and
PVW
(Preview) rows are selected
individually by pressing buttons on those rows. By contrast, selecting a button on the single row in
Express
mode first places the designated source on the (unseen)
Preview
bus, then immediately switches it to
Program
output.
•
Program
•
Preview
BKGD
DSK 1
DSK 2
DSK 3
DSK 4
FTB
Program
Out
The
Preview
row
appears in standard
Switcher
mode. Selections
determine which source is queued up for display in the
Background
layer by a subsequent (BKGD)
Take
or
Transition
operation.