Index
VTM-2000 Installation and Operation Handbook
127
Demodulator
A receiver, such as for television broadcast, cable, and closed circuit
applications. A TV demodulator receives and processes off-air or cable RF signals and provides
baseband video and audio outputs.
DHCP
Dynamic Host Configuration Protocol
Differential Gain
A measurement that specifies how much the chrominance gain is affected
by the luminance level. Expressed as a percentage showing the largest amplitude change
between any two levels, it indicates how much color saturation variance occurs when the
luminance level changes.
Differential Phase
A peak-to-peak measurement that specifies the extent to which the
chrominance phase is affected by the luminance level. Expressed in degrees of subcarrier
phase, it indicates how much hue shift occurs with luminance level changes.
Digital Video Broadcasting (DVB)
A specific project office of the European Broadcast
Union. This group has produced a set of digital broadcasting standards.
DSK
Down Stream Key, a keyer which is electronically located after (or down stream from) all
other functions of a switcher. The key resulting will appear to be on top of all other pictures
from the switcher.
D-VITC
Digital Vertical Interval Time Code. Timecode information stored on specific lines in
the vertical blanking interval of a television signal.
EAV
End of Active Video in component digital systems.
EBU
European Broadcasting Union
Editor
A device or system which controls video tape recorders, video switchers, and other
related devices in order to electronically splice segments of recorded video into a finished
production.
EDH
Error Detection and Handling. A recommended practice defined in SMPTE RP 165. A
system to generate and then detect video data errors in serial digital video systems.
Effects Keyer
A keyer which is electronically located in the mix/wipe generator portion of a
switcher. The resulting key would appear under the down stream key.
EIA Rack Space or Unit
A specific size as designated by the Electronics Industry
Association. The rack unit is 19 inches wide, and is 1.75 inches tall. A device which requires 3
EIA rack units is 19 inches wide and 5.25 inches (3x1.75 = 5.25) tall.
Elementary Stream (ES)
A generic term for one of the coded video, audio or other
variable length bit streams which are packetized to form MPEG-2 transport streams. Consists
of compressed data from a single source (audio, video, data, etc.). One elementary stream is
carried in a sequence of PES packets with one and only one stream ID.
Embedded Audio
Digital audio information multiplexed onto a serial digital data stream.
Up to sixteen channels can be multiplexed on a single stream of 601 video, minimizing cabling
and routing requirement.
ENG
Electronic News Gathering
