Videotek TVM9100PKG Installation And Operation Handbook page 280

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Key Cut In a key effect, this is the video which designates the portion of background
video which is removed.
Key Fill In a key effect, this is the video which is used to replace the portion of
background video which was removed. This may be the same video as the Key Cut
video.
Key Invert In a key effect, this is an electronic action which reverses the polarity of
the key cut signal. It makes black appear as white, and white appear as black.
Key Mask In a key effect, it uses a wipe pattern from the wipe pattern generator to
restrict the key cut from removing video in a portion of the screen. This requires the
use of the wipe pattern generator and the Mask/Preset Size controls.
Key Source Another term which is the same as key cut.
Legalization The modification of serial digital video to conform to analog color
space rules, as required by users.
LCD Liquid Crystal Display
LED Light-Emitting Diode
LFE Low Frequency Effects
Lissajous A display of the amplitude and phase relationships between two input
signals.
LS Left Surround
LTC Longitudinal Time Code, A SMPTE timecode standard usually recorded onto the
linear audio track of a VTR.
Luminance The degree of brightness (black and white portion of the video signal) at
any given point in the video image. A video signal is comprised of luminance,
chrominance and sync. If luminance is high, the picture is bright and if low the picture
is dark. Changing the chrominance does not affect the brightness of the picture.
Main Level A range of allowed picture parameters defined by the MPEG-2 video
coding specification with maximum resolution equivalent to standard definition
television.
Main Profile A subset of the syntax of the MPEG-2 video coding specification that is
supported over a large range of applications. Applications include, MP@HL (Main
profile at high level) and MP@ML (Main profile at main level).
Mask/Preset Size Uses the wipe pattern generator in the keyer portion of the effects
generator. This is used to adjust the size of a preset pattern or for adjusting the size of a
mask to block a portion of the key cut (source) from use in the keyer.
Matte Generator An internal generator which can make any color, is used for border
color and may be used for key fill. It is identical to the Color Background Generator,
but simply used in other areas of the switcher.
Mbps Megabits Per Second
mV Millivolts
256 TVM Series Installation and Operation Handbook
Copyright © 2008, Harris Corporation