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AUTO COLOR
Lighting conditions can vary dramatically from one remote Skype source to the next. Ensuring
consistent color and avoiding unwelcome brightness or color shifts as conditions change can be
troublesome, and expensive.
To help you overcome these problems, TalkShow provides Auto Color, a unique feature capable of
dynamically adapting the color characteristics of your video sources as lighting conditions vary. For
many productions, simply enabling the Auto Color switch is all it takes to produce a show that looks
amazingly consistent.
MULTICAM
By default, each source with Auto Color enabled is processed uniquely – without reference to video
other Skype calls. For VS 4000, even greater consistency can be achieved by treating sources in
similar illumination environments as a group. Enable Multicam for several sources causes Auto
Color to evaluate and adjust them in unison. You might, for example, enable Multicam for multiple
Skype feeds from a boardroom with consistent lighting.
LISTEN ONLY
Again, for VS 4000 only, the Listen Only switch allows you to include a source in the Multicam group
without adding its own feed to the group evaluation. Thus a camera trained on a giant purple
dinosaur can be automatically corrected without disproportionately biasing the group evaluation
and consequent Auto Color correction. Alternatively, one might enable Multicam for a number of
sources, turning Listen Only on for all but one camera – effectively making that camera the color
reference all other cameras in the group will follow.
Note: The Proc Amp, discussed next, is downstream of the Auto Color system. This allows you to
apply further manual color adjustments to your individual sources, whether for fine tuning or to
achieve a specific “look”.
PROC AMP
A switch at the top of the Proc Amp control group toggles the feature on/off. Other controls operate
as follows:
Brightness: Adjustment range from -50 to +50 IRE (the default being 0). As reference, the full
luminance range of the visible portion of a video signal can be thought of as ‘100 IRE units’
(named for the Institute of Radio Engineers) – ignoring minor regional variations.
Contrast – Adjustment range from 25 - 400% (default 100%).
Hue – Adjustment range between -180° and +180°. Adjusts the master color of the video signal
from the attached source, swinging the entire image through the color wheel’s spectrum.
Saturation – Adjustment range from 0-500%. Zero saturation results in a ‘black and white’
picture; increased saturation results in richer colors. High saturation values can exaggerate the
color portion of the signal.
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