Ross Carbonite Ultra Series, Руководство пользователя

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Glossary
Interlaced
An Interlaced video format starts at the top of
the screen and draws all the odd number scan
lines and then all the even number scan lines
in sequence. This results in half the image being
drawn in one pass and the other half of the
image being drawn in the second. These two
passes are called Fields, where the first pass is
called Field 1 and the second pass is called Field
2. When both Field 1 and Field 2 have been
drawn, resulting in a complete image, you have
a single Frame.
Progressive
A Progressive scan video format draws each
scan line in sequence, starting from the top of
the screen and working to the bottom. Unlike
Interlaced, with Progressive scan the entire
image is drawn at one time, in a single pass. This
means that there are no fields in a Progressive
scan image.
Auto Key
A pairing of two video signals, a key video and
a key alpha, to create a key. In the switcher, you
associate the fill and alpha so that the switcher
knows which alpha to use when the video is
selected.
Auto Transition
An automatic transition in which the manual
movement of the fader handle is simulated
electronically. The transition starts when the
AUTO TRANS button is pressed and takes place
over a pre-selected time period, measured in
frames.
Chroma Key
Chroma Key is a key in which the hole is cut
based on a color value, or hue, rather than a
luminance value or alpha signal. The color is
removed and replaced with background video
from another source.
Cut
An instantaneous switch from one video signal
to another.
Dissolve
A transition from one video signal to another
in which one signal is faded down, while the
other is simultaneously faded up. The terms mix
or cross-fade are often used interchangeably
with dissolve.
Field
One half of a complete picture (or frame)
interval containing all of the odd, or all of the
even, lines in interlaced scanning. One scan of
a TV screen is called a field; two fields are
required to make a complete picture (which is
a frame).
Force, Mask
An effect that forces the masked region to the
foreground but is not bound by the key. For
example, if you have a key and apply a mask to
it. The masked area is bound by the edges of the
key. When force is turned on, the masked area
is filled with the video from the key (nothing
appears masked) but you can move the mask
outside of the key and the key video is still filling
the masked region.
Frame
One complete picture consisting of two fields of
interlaced scanning lines.
File Transfer Protocol
A network protocol that is used to transfer files
from one host computer to another over a
TCP-based network.
Gain
Gain represents the range of signal values
present in a video signal from a lowest to a
highest point (from black to white for example).
Increasing gain expands this range, while
decreasing gain compresses this range. Clipping
occurs if applied gain changes cause output
signal values to fall outside the allowable range.
Generally, increasing the gain for a specific color
component causes the video signal colors to
become increasingly saturated with that color.
Similarly, decreasing the gain for a specific color
component progressively removes that color
component from the output video signal.
Gamma
Gamma corrections introduce non-linear
corrections to a video signal. A gamma
Ultra User Manual (v6.6) — Glossary • 193