Specifications

Glossary
VTM-200 Installation and Operation Handbook E-6
LCD Liquid Crystal Display
LED Light-Emitting Diode
LFE Low Frequency Effects
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
M/E Mix/Effects System
MP@HL Main Profile at High Level
MP@ML Main Profile at Main Level
MPEG Refers to standards developed by the ISO/IEC JTC1/SC29 WG11, Moving
Picture Experts Group.
MPEG-2 Refers to ISO/IEC standards 13818-1 (Systems), 13818-2 (Video), 13818-3
(Audio), and 13818-4 (Compliance).
Multi-Level Effects Applies to any effects generator which can do more than one
effect at a time. Typically, a multi level switcher can produce a Key and a Background
transition in the same effects generator at one time.
NTSC National Television Systems Committee. The color television system used in
the United States, Canada, Mexico and Japan.
Packet Identifier (PID) A unique integer value used to associate elementary streams
of a program in a single or multi-program transport stream.
Packet A packet consists of a header followed by a number of contiguous bytes from
an elementary data stream. It is a layer in the system coding syntax.