GRASS VALLEY Ignite SDC Series Instruction Manual page 112

Glossary
Frame
One complete scan of a video image. For in-
terlace video, alternate lines are scanned so a
frame containing all the picture information
consists of two fields. Also see Field.
Frame Rate
The number of frames presented per second.
For interlace systems the frame rate is half
the field presentation rate.
G
GPI (General Purpose Input)
GPO (General Purpose Output)
A digital signal interface, used to activate a
device or piece of equipment for limited re-
mote control of a device's functions.
H
HD
High Definition
House Sync
Sync generated within a facility that is used
as a reference for generating and/or timing
other signals.
Hue
The location of a color on the color spectrum
(i.e. red, yellow, green, blue). Chroma, hue,
and luminance make up the three character-
istics of television color.
I
Interlace
A system of video scanning where the odd
and even numbered lines of a picture are pre-
sented consecutively as two separate inter-
leaved fields. The two fields required to
make a complete picture are called a frame.
112
IP (Internet Protocol)
A data-oriented protocol used for communi-
cating data across a packet-switched inter-
network.
J
Jitter
An undesirable variation in the timing of
transitions in a digital signal.
K
L
LCD
Liquid Crystal Display
LED
Light-Emitting Diode
Luminance
The brightness of the picture or area of the
screen being considered. Chroma, hue, and
luminance make up the three characteristics
of television color.
The color video picture information contains
two components: luminance (brightness and
contrast) and chrominance (hue and satura-
tion).
Lux
A measurement of illumination. The metric
equivalent of foot candle.
Ignite Glossary