User guide

Reference Guide: RX1290 H.264 Contribution Receiver Page A-1
ST.RE.E10228.1
Annex A
A. Glossary
The following list covers most of the abbreviations, acronyms and terms as used in TANDBERG Television
Limited Manuals, User and Reference Guides. All terms may not be included in this Reference Guide.
µm Micrometre (former name - micron): a unit of length equal to one millionth (10
-6
) of a metre.
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 on all lines at
half the luminance rate.
422P@ML 422 Profile at Main Level: A subset of the MPEG-2 standard, which supports digital video
storage (DVD etc.) and transmissions up to 50 Mbit/s over various mediums.
Used for Contribution and Distribution applications.
5B6B 5 Binary Bits Encoded to 6 Binary Bits: Block code.
ADPCM Adaptive Differential Pulse Code Modulation: An advanced PCM technique that converts
analogue sound into digital data and vice versa. Instead of coding an absolute measurement
at each sample point, it codes the difference between samples and can dynamically switch
the coding scale to compensate for variations in amplitude and frequency.
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 Line-ups 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.