Technology
User Manual for AZ110 Broadcast Satellite Modulator with ASI interface
version 3.2
75
SHAPING THE FUTURE SATELLITE OF COMMUNICATIONS
Newtec has developed a proprietary encapsulation format called XPE (Extended
Performance Encapsulation), which is much more efficient than MPE.
Figure 39 - Transport Stream Carried over DVB-S2
7.1.3.2
DVB-S2 Multi-Stream
A unique feature of DVB-S2 is the ability to carry different transport streams and/or
generic streams into separate baseband frames, on the same satellite carrier.
Each baseband frame is identified with an Input Stream Identifier. A sequence of
DVB-S2 baseband frames with the same ISI number is called a DVB-S2 stream. A
satellite carrier that transports several DVB-S2 streams is said to operate in Multi-
stream mode.
Figure 40 - DVB-S2 - Multi-Stream
7.1.3.3
DVB-S2 CCM, VCM and ACM
In DVB-S2 each baseband frame can be modulated with different error correction
and modulation parameters (in short, ModCod, for example QPSK 4/5). A DVB-S2
modulator is capable of detecting these parameters on the fly, without loosing
synchronization from one frame to the next.
Video, audio or IP
PID 1
PID 2
PID 3
TS
DVB-S2
modulation
DVB-S2 baseband
TS
IP data
IP data
DVB-S2 BBF
IS I 1
IS I 2
IS I 3
IS I 4
TS
Multi-stream
DVB-S2
modulation
