Grass Valley 4300 Krystal Reference Manual v.3.1 - Manual (Page 305)

Krystal 4300 Reference Glossary-1
Glossary
A
Appearance:
The “look” of the picture image itself, inde-
pendent of any picture transformation.
Aspect
The ratio between the width and the height
of an object such as a wipe pattern or a video
screen.
Axis
The point in 3-D space around which a pic-
ture rotates. See Source Axis and Target Axis.
B
Background
(1) External video that forms a background
scene into which a key may be inserted.
(2) Black or colored Mattes generated by the
DPM for use as background video in key ef-
fects.
Bias
In path control, determines whether the path
will be “pulled” towards the previous or the
following keyframe.
Border
Adding matte to the edges of the holes cut by
the key signal. On Krystal systems the border
fills in from the outside edge of the key.
Brightness
The relative intensity of light determined by
the sum of responses of the eye to the compo-
nent wavelengths. Directly related to Lumi-
nance.
B-Y
The designator used to describe the Blue mi-
nus Luminance color portion of a component
video signal.
C
CG
See Character Generator.
Camera Channel
Control channel that mathematically manip-
ulates pictures to represent an observer’s
viewpoint. The camera channel performs
transforms and translations, and controls
some Combiner functions.
Channel
A digital effects processing path for video
and key signals. On Krystal systems, the
term is used for several different types of
channels. See Camera Channel, Control
Channel, Global Channel, Logical Channel,
Physical Channel, Wireframe Channel.
Combiner
Optional Krystal hardware that combines
multiple sources into composite video/key
signals with control of picture layering (over,
under mix, etc.).