additional pattern generators are dedicated to color
wash generators. A single simple pattern generator
is available to each key.
• Trails — allows you to add trail effects to any key
type. Trail effects include Soft, Hard, Key, and Key
Smear trails. Soft and Hard trails apply to the video
in the key, and Key and Key Smear trails apply to
the key itself. In the case of a shaped key, the trails
are only visible within the key itself if a Soft or Hard
Trail is used. Select a Key or Key Smear Trail if you
need the trails to appear outside of the key.
The number of MEs depends on the size of your frame,
the number of MultiViewers installed, and the video
format you are operating in. Each MultiViewer or ME
option uses the same hardware in the frame.
• 4RU – expandable from 0 to 3.
• 8RU – expandable from 0 to 4.
UltraChrome
The UltraChrome chroma keyers uses patented advanced
video processing technology to provide exceptional blue
spill reduction and clean edges, even with difcult source
material. Glass, smoke, translucent materials, and natural
shadows are handled superbly.
Chroma key shadows can either be extracted from the
source image or simulated using the optional border
generators.
There is 1 oating Chroma Key available to each ME
and can be assigned to any keyer.
Color Correction
Color correction is performed by either Processing
Ampliers (Proc Amps) in the HSL (Y-Cr-Cb) color
space or by RGB Color Correctors in the RGB color
space. Both Proc Amps and RGB Color Correctors allow
you to apply color correction to video sources on the y
to input video signals, entire buses, or aux bus outputs.
• Input Based Correction — color correction is
applied to the video input regardless of which ME or
Aux Bus it is selected on. Input-based color correction
is not stored in switcher memories. Only supported
on the MultiProcessor Input board.
• ME Input Based Correction — color correction is
applied to all the video inputs to the ME. Not required
with the MultiProcessor Input boards.
• ME Bus Based Correction — color correction is
applied to the output of the assigned bus. Unlike the
other color correction types, bus-based color
correction is stored and recalled with memories. This
allows you to include a color correction element as
part of an effects dissolve.
• Aux Bus Based Correction — color correction is
applied to the output of an Aux Bus. Like input-based
color correction, Aux Bus color correction is not
stored in switcher memories.
Color correction is additive, allowing you to apply any
combination of Proc Amp and RGB Color Corrector
based adjustment to a video signal on the input, as well
as on the bus. If multiple color corrections are applied,
the input-based correction is applied rst, and the
bus-based correction is applied after that.
High Dynamic Range (HDR) and Wide
Color Gamut (WCG) Conversion
The RGB color correctors are used to convert between
different SDR and HDR ranges and between color gamuts
(WCG).
Note: HDR and WCG input conversion is only supported on the
MultiProcessor Input and 12G MultiProcessor Input boards.
Output conversion is supported on any Video Output board.
HDR and WCG conversion can be applied on the y to
input video signals, entire buses, or aux bus outputs.
To congure the dynamic range and color gamut
conversion of input sources you must set the
MultiProcessor Input to a mode that supports HDR/WCG
conversion. This will convert the input source to the
format that the switcher is operating in. Video signals
can again be converted for individual output BNCs.
Supported Color Gamuts:
• BT.709 — color gamut recommended for HD video
signals.
• BT.2020 — wide color gamut recommended for
UHDTV1 video signals.
Supported Dynamic Ranges
• SDR — Standard Dynamic Range.
• HLG — Hybrid Log Gamma.
• PQ — Perceptual Quantizer.
• S-Log3 — Sony
®
S-Log3.
Look Ahead Preview
This feature allows you to view different preview outputs,
depending on whether or not the ME is on-air. Look
Ahead preview works differently than the standard
Preview, as, instead of displaying the output of just the
Program or Preview, the output of the Look Ahead
preview changes depending on the on-air status of the
ME.
Any output BNC can be assigned as the Look Ahead
preview for an ME, except for the Program/Preset ME.
Acuity UHD Configuration Guide (v9.1) — Features • 9
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