Videotek VTM-2000 Specifications download pdf (Page 103)

VTM-2000 Installation and Operation Handbook

D-1

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.

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.

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Videotek VTM-2000 Specifications Page 103