Grass Valley Indigo AV Mixer v.1.2.2 - Manual (Page 166)

166 INDIGO AV Mixer User Manual
Glossary
GPI (General Purpose Interface Input)
see GP
GPO (General Purpose Interface Output)
see GP
GVG-100/200
Protocol to send commands via serial link.
H
HD
Abbreviation for High Definition.
Digital HD video provides a higher resolu-
tion (up to 1920 x 1080 pixels) and thus
shows much more details than standard def-
inition video.
Hi-Res, HiRes
Abbreviation for High Resolution.
Usually describes screen or video resolutions
of 800 x 600 pixels or higher.
House Sync
Sync generated within a facility that is used
as a reference for generating and/or timing
other signals.
HR
See Hi-Res.
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.
K
Key
An effect where a portion of a background
scene is replaced by a new video. Key cut
and key fill signals are involved, though in
some cases the same signal may be used for
both (self key).
Key Cut
In key effects, the key cut signal is used to
specify where to cut a hole in the background
that will be filled with the key fill video. The
key cut signal determines the shape of the
key effect.
Key Fill
In key effects, the video signal which fills the
hole cut in the background video.
Key Frame
A complete definition of an effect at a single
point in time. Default keyframe values can
be set. See Snapshot.
Key Invert
Reversing the polarity of a key, such that ma-
terial formerly keyed out will be keyed in,
and vice versa.
Key Mask
A key mode which allows use of a wipe pat-
tern generator to prevent some undesirable
portions of the key cut signal from cutting
holes in the background video.