Multistream or Efficient Satellite Distribution of Terrestrial TV and Mobile TV Content
Multistream is a main advantage of the DVB-S2 standard that allows users to aggregate a number of independent transport streams or IP streams into one satellite carrier in a fully transparent manner, maintaining the integrity of the original content.
Where to use?
Multistream is ideally used for Primary Distribution of Digital Terrestrial TV (DTT) and Mobile TV over satellite
How does it work?
The different ASI input streams (Terrestrial TV, Mobile TV, Radio, IP) coming from broadcasters are combined in the aggregator. The aggregator supports multiple ASI inputs and combines the different multiplexes in one single baseband stream (= Multistream) which is inserted into the broadcast modulator.
In case of a large number of ASI transport streams other aggregators can be put into parallel or subgroups in order to feed the modulator. The modulator sends the signal (single carrier) over satellite to the required towers.
At the other side of the satellite link the multiple ASI-output satellite receiver is capable of demodulating multiple MPEG streams in Multistream mode. The transport streams are separated again based on their DVB-S2 Input Stream Identifier (ISI).
Your Advantages?
• Lowest investment/CAPEX cost
- From head-end equipment to tower equipment, lowest number of devices
- No need for re-multiplexing at the towers
- 1-4 multiplexes distribution with only 1 Receiver (e.g. compared with 4 IRD’s!)
• Lowest operational/OPEX cost
- Less satellite bandwidth needed compared with DVB-S
- Distribution of multiple services (Terrestrial TV, Mobile TV, Radio and IP) in a single carrier
- Ability to saturate the transponder and gain up to 12% bandwidth on top of the gain brought by DVB-S2.
• Lower startup cost & faster startup
- Single Frequency Network (SFN) compliant
- Lower number of frequencies necessary
- Fully interoperable, transparent and compliant with the DVB-S2 standard
