Dream Vision DM 7000-S

20. Glossary of terms

AC3

Dolby Digital, sound system

AGC

Automatic Gain Control. . This always provides the best picture quality. It

does not, however, guarantee a perfect picture, as the AGC is dependent on

the input signal. The poorer the input signal, the less the AGC can manage.

Analog

An ordinary signal transmission procedure, where the fluctuations of the

signal exactly correspond to the sound and picture waveforms of the source.

Aspect ratio

Ratio of lengths of picture sides, e.g. 4:3 or 16:9

Bouquets

A bouquet is (like a bouquet of flowers) a package of programmes from a

single Pay-TV provider.

Conditional Access. Control the user´s access to services and programmes

which are encrypted for copyright or commercial reasons.

Common Interface - Conditional Access Module. The basic idea of the

Common Interface (CI) is as follows. There is a uniform, standard interface for

the many television and radio programmes, Internet and software products

for which charges are levied.. To enable you to receive encrypted program-

mes with the satellite receivers Irdeto, Cryptoworks, Conax, Nagravision,

Viaccess, this is equipped for the age of Common Interface. Of course, all

Common Interface options are available to you with the multi-access modules

for the sat-receivers with CI. Pay-TV programmes are normally encrypted; the

screen is black, and there is no sound. After the subscription fees or a one-

time charge for the smartcard have been paid, the associated TV offerings

can be seen decrypted. The CI-CA module compares the code in the box

with the one broadcast. If they match, the relevant programmes are decryp-

ted and thus become visible. There are CI-CA modules for different encryp-

tion systems (Cryptoworks, Conax, Nagravision, Viaccess and soon also from

Irdeto). In order to watch Pay-TV programmes, as well as the CI-CA modules,

you need a Sat-Receiver with Common Interface, a multi-access module with

a CI slot and the corresponding smartcard from the programme supplier.

Coding systems

see Encryption systems.