GRASS VALLEY GV KORONA, Руководство пользователя, Страница: 402 / 415

Kayenne/Karrera/GV Korona
User Manual
405
Image Store
A device that captures, saves, and outputs still and movie video images.
Interlace
A system of video scanning where the odd and even numbered lines of a picture are
presented consecutively as two separate interleaved fields. The two fields required to make
a complete picture are called a frame.
Jitter An undesirable variation in the timing of transitions in a digital signal.
Joystick
A hardware positioner with control of multiple axes.
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 Invert
Reversing the polarity of a key, such that material formerly keyed out will be keyed in, and
vice versa.
Key Mask
A key mode which allows use of a wipe pattern generator to prevent some undesirable
portions of the key cut signal from cutting holes in the background video.
Key Priority
The stacking order of multiple keys. The keyed signal with the highest priority appears in
front of all the others. Keyed signals appear below higher priority keys and in front of lower
priority keys, in a stack. A key priority transition changes the order of the keys without
changing the background output.
Key Frame
A complete definition of an effect at a single point in time. Default keyframe values can be
set for a suite.
Learn
To save a panel setup using E-MEM.
Linear Key A key in which the keyer signal is faithfully reproduced in the final key effect. Linear keying
preserves soft key edges, and generally has a gain of 1, or unity.
Look Ahead
Preview
Looping,
Loop-
Through
Video that shows the result of the currently setup next transition.
An input that includes two connectors. One connector accepts the input signal, and the
other connector is used as an output for connecting the input signal to another piece of
equipment. On GV switchers, only the analog reference input is loop though.
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.
Luminance
Key
A key effect in which the portions of the key cut signal that are greater in luminance than the
clip level cuts the hole in the background scene. Generally used when the key cut and key fill
signals originate from the same source. Luminance key clip and gain is adjustable.