TANDBERG TT1220 Series, Инструкция по эксплуатации

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Instruction Manual: Professional Decoder Page A-1
ST.TM.TT1220.1
Annex A
A. Glossary
The following list covers most of the abbreviations, acronyms and terms used in
TANDBERG Television Limited Manuals. All terms may not be included in this manual.
µ
m Micro metres (10 -6 metres).
3:2 pulldown A technique used when converting film material (which operates at 24 pictures per second) to 525-line video
(operating at 30 pictures per second).
4:2:0 Digital video coding method in which the colour difference signals are sampled on alternate lines at half the
luminance rate.
4:2:2 Digital video coding method in which the colour difference signals are sampled at half the luminance rate.
5B6B Block code (5 binary bits encoded to 6 binary bits).
ac Alternating Current.
ADPCM (Adaptive
Differential Pulse Code
Modulation) A reduced bit-rate variant of PCM audio encoding (see also PCM). This algorithm encodes the difference between an
actual audio sample amplitude and a predicted amplitude and adapts the resolution based on recent differential
values.
ACC Authorisation Control Computer.
ADT Audio, Data And Teletext.
AFC Automatic Frequency Control.
AFS Automation File Server.
AGC Automatic Gain Control.
AMOL I and II (Automatic
Measure of Lineups I and II) Used by automated equipment to measure programme viewing ratings.
ASI Asynchronous Serial Interface.
ASIC (Application-Specific
Integrated Circuit) A customised chip designed to perform a specific function.
Async Asynchronous.
ATM (Asynchronous
Transfer Mode) A source independent transport mechanism, supporting variable bit-rate transmission, which uses fixed length
packets (called cells) to transfer user data.
ATSC Advanced Television Standards Committee.
B3ZS Interface code (bipolar with three successive zeros substituted). Similar coding scheme to HDB3.
Backward Compatibility A newer coding standard is backward compatible with an older standard if decoders designed to operate with the
older coding standard are able to continue to operate by decoding all or part of a bit-stream produced according to
the newer coding standard.
BAT (Bouquet Association
Table) Part of the service information data. The BAT provides information about bouquets. It gives the name of the bouquet
and a list of associated services.