Grass Valley Indigo AV Mixer v.1.2.2 - Manual (Page 164)

164 INDIGO AV Mixer User Manual
Glossary
Clip
A threshold level adjustment to which the
keying attribute (luminance, chrominance) is
compared for generating the internal key
control signal. Clip, in conjunction with gain,
sets the switching point between the back-
ground and the key fill. Also see Gain.
Composite Video
An encoded video signal that combines color
information with luminance information.
NTSC, PAL, and D-2 are examples of com-
posite video.
Compositing
Combining two or more video signals to-
gether into one output signal.
Control Signal
A signal used to perform an alteration or
transition of video signals. For example, con-
trol signals are used for keying, masking,
and wipe transitions.
Control Surface
The set of controls available to a single oper-
ator. These controls may reside on separate
but related control panels.
Cross Fade
See Mix.
Crossbar
Mechanical device with push-buttons to con-
nect various inputs and outputs.
Crosspoint
An electronic switch, usually controlled by a
button on the panel, that allows video or au-
dio to pass when the switch is closed.
Cut
An instantaneous switch from one picture to
another. Switching circuitry allows cuts only
during the vertical interval of the video sig-
nal to prevent disruption of the picture.
D
Delegate
To assign panel controls to a particular oper-
ating function. Some panel controls (buttons,
knobs, Joystick) can affect more than one
function. The operator can choose an alterna-
tive function by delegating the panel controls
to that function (typically by pressing or
holding down a panel button).
Deserializer
A device that converts serial digital informa-
tion to parallel.
Dissolve
See Mix.
DHCP (Dynamic Host Configuration Protocol)
A protocol for automatically assigning ad-
dresses to clients when they connect to a net-
work, and recovering the addresses when
they disconnect.
Digipot
Abbreviation for DIGItal POTentiometer. A
Digipot facilitates to control an analog out-
put by a digital input.
DPM (Digital Picture Manipulator)
A digital video effects systems which can
manipulate a video picture to change its size,
shape, angle, etc.
DVE (Digital Video Effect)
Visual effect that provides interesting transi-
tions from one scene to another (for example,
fades, wipes, page turns, etc.) rather than just
switching signals.
DVI-D
DVI-D is an interface for transferring digital
video information. It is commonly used for
high definition (HD) signals, for example,
from PC to TFT monitor.