VTM-2400 Installation and Operation Handbook
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Appendix E
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Glossary
601
An international standard (ITU-R BT.601) for component digital television. It defines the
sampling systems, matrix values, and filter characteristics for digital television.
8 VSB
Vestigial sideband modulation with 8 discrete amplitude levels.
16 VSB
Vestigial sideband modulation with 16 discrete amplitude levels.
Advanced Television Systems Committee (ATSC)
The parent organization that
developed, tested and described the form and function of the US digital television formats.
AES/EBU
A digital audio standard established jointly by the Audio Engineering Society (AES)
and the European Broadcasting Union (EBU).
Artifacts
Unwanted visible effects in the picture created by disturbances in the transmission
or image processing, such as edge crawl or ‘hanging dots’ in analog pictures or ‘pixelation’ in
digital pictures.
Aspect Ratio
The ratio of horizontal to vertical dimensions. A square has an aspect of 1:1
since the horizontal and vertical measurements are always equal. Current television screen
aspect ratios are 4:3 and 16:9.
Asynchronous Serial Interface (ASI)
A transmission method adopted by the DVB, and
called DVB-ASI. The transmission method allows for the transport of varying data payloads in
a constant data stream. The DVB-ASI transport stream rate is 270 Mb/s.
Audio Breakaway
Routing video and accompanying audio in separate signal paths.
Audio-Follow
Routing video and accompanying audio together in the same signal path.
Auto Trans
Automatic transition. The execution of a single wipe or fade from current
picture to another picture by way of an automatic device.
Bandwidth
The range of frequencies used to transmit information such as picture and sound.
Baseband Video
An unmodulated video signal.
Black
Also color black, blackburst. A composite color video signal that has the composite
sync, reference burst, and a black video signal.
Blanking Processor
A circuit which removes sync, burst and blanking from the program
video and then replaces it with sync, burst and blanking from the reference input. The process
ensures constant sync and burst levels on program video.
Border
An electronically-generated picture member which is used in wipes to separate the
two video sources used in the wipe. It is of even thickness and has color produced by the
matte generator.
Broadcast Legal
Encoding video signal parameters to conform to prescribed limits for
broadcast. Encoding rules vary by NTSC, PAL, country and broadcast facility.
BTSC
Broadcast Television Standards Committee. A US standard for stereo audio encoding in
NTSC broadcast television.
