Cytavision Network Architecture
The network architecture can be seen below (Figure 4).
The network consists of the Digital Head-end,
the Backbone and the network
at the customer premises.
The Digital Head-end receives live
programs from satellite and decodes them. It consists of:
Receivers-Decoders-Descramblers:
These Decode and descramble the video signal received from different
sources.
Digital video IP streamers:
These encapsulate MPEG-2 streams over IP to send over the telecom
network.
Video Server:
It is where all the movies are stored for Video on Demand.
Digital Rights Management and Conditional Access(CA):
The conditional access guaranties the safety of content from the
head-end to the STB by using scrambling algorithm.
The Backbone consists of IP or ATM nodes.
The network at the customer premises
consists of:
- Splitter
- Modem
- Wiring
- Set-Top-Box and TV
The Set-Top-Box (STB) is connected to the ADSL modem and to the
TV. The STB decodes the MPEG signal that is received from the ATM
packets to PAL TV format. It supports IP (i.e. IGMP, TCP, UDP, etc.)
HTML and Java.
After the necessary wiring is done by the customer (Installation
Instructions), the following equipment will be installed at
the customer:
- ADSL modem (multiple 10BaseT interface ports)
- Splitter/Filters
- Set-Top-Box
- Remote control
- Wireless keyboard
- Security card
|
