Appendix D ♦ Glossary - Videotek TVM9100PKG Installation And Operation Handbook

Appendix D ♦ 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.
Active Format Description (AFD) An ancillary data packet in a digital video
interface for the purpose of describing certain spatial characteristics of a high definition
or standard definition video image. Formatted according to SMPTE 2016, AFD
information is intended to guide video equipment regarding the presentation of video
of one aspect ratio on a display of another aspect ratio. Bar Data information is used to
signal the precise unused areas of active video when the active image does not
completely fill the picture area, in particular widescreen cinema material carried
letterboxed in a frame with bars top and bottom
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.
TVM Series Installation and Operation Handbook 251
Copyright © 2008, Harris Corporation