Glossary

Annex A

The following list covers most of the abbreviations, acronyms and terms as used in Ericsson Manuals, User and Reference Guides. All terms may not be included in this Reference Guide.

μ

Micrometre (former name - micron): a unit of length equal to one

m

millionth (10-6) of a metre.

 

1000BaseT

The term for the Electrical Gigabit Ethernet interface. This is the

 

most common interface for Gigabit Ethernet. Most Gigabit-enabled

 

PCs and equipment use this interface.

3:2 pull-down

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

 

Mbps 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

Authorization Control Computer.

ADT

Audio, Data And Teletext.

AFC

Automatic Frequency Control.

AFS

Automation File Server.

AGC

Automatic Gain Control.

EN/LZT 790 0005 R1A

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