Annex A

DSNG

Digital Satellite News-Gathering.

DSP

Digital Signal Processor.

DTE

Data circuit Terminating Equipment: A communications device that

 

originates (is the source) or is the end receiving unit (destination) of

 

signals on a network. It is typically a terminal or computer.

DTH

Direct-To-Home. The term used to describe uninterrupted

 

transmission from the satellite directly to the subscriber, that is, no

 

intermediary cable or terrestrial network utilized.

DTMF

Dual-Tone MultiFrequency

DVB

Digital Video Broadcasting: A European project which has defined

 

transmission standards for digital broadcasting systems using

 

satellite (DVB-S), cable (DVB-C) and terrestrial (DVB-T) medium,

 

created by the EP-DVB group and approved by the ITU. Specifies

 

modulation, error correction, etc. (see EN 300 421 for satellite,

 

EN 300 429 for cable and EN 300 744 for terrestrial).

DVB SI

Digital Video Broadcasting Service Information.

DVB-PI

DVB-Professional Interfaces: TTV Lan search shows – DVB

 

Physical Interfaces

DWDM

Dense Wavelength Division Multiplexing. A mechanism to utilize

 

existing fiber with even more bandwidth by adding extra signals

 

using other wavelengths/colors

Earth

Technical Earth: Ensures that all equipment chassis within a rack

 

are at the same potential, usually by connecting a wire between the

 

Technical earth terminal and a suitable point on the rack. This is

 

sometimes known as a Functional earth.

 

Protective Earth: Used for electric shock protection. This is

 

sometimes known as a safety earth.

EBU

European Broadcast Union.

ECM

Entitlement Control Message.

EDI

Ethernet Data Input

EIA

Electronics Industries Association (USA).

EIT

Event Information Table: Equipment: A component of the DVB-

 

Service Information (SI) stream generated within an Encoder,

 

containing information about events or programmes such as event

 

name, start time, duration, etc.

 

System: EIT (Present/Following) contains the name of the current

 

and next event. It may include an optional descriptor (synopsis)

 

giving brief details of content. EIT (Schedule) is used to produce a

 

full EPG. The EIT is the only DVB-SI table, which can be encrypted.

Elementary Stream A generic term for a coded bitstream, be it video, audio or other.

EMC

Electromagnetic Compatibility.

EMM

Entitlement Management Message.

A-6

EN/LZT 790 0005 R1A