DVB S2
DVB-S2, or Second Generation Digital Video Broadcasting, is the the successor for the popular and widely used DVB-S.
Key improved features from the original DVB-S are:
- The coding scheme is a powerful LDPC code. Chosen because of its low encoding complexity they have a special structure, known as Irregular Repeat-Accumulate Codes.
- VCM & ACM (Variable & Adaptive coding and Modulation) modes. This fully allows optimisation to the bandwidth by changing the transmission parameter dynamically.
- Enhanced modulation scheme up to 32APSK
- Backward Compatibility
DVB S2 achieves significantly better performance than all predecessors.
Satellite Models:
.
Input Interface
Modes
FEC
Modulation
Modulation Schemes
Interleaving
Pilots
DVB-S
Single Transport Stream (TS)
Constant Coding
Reed-Solomon (RS)
Single-Carrier QPSK
BPSK, QPSK, 8PSK, 16QAM
Bit-Interleaving
N/A
DVB-S2
Multiple Transport Stream and GSE
Variable and Adaptive Coding and Modulation
LDPC + BCH
Single-Carrier QPSK with multiple streams
BPSK, QPSK, 8PSK, 16QAM, 32APSK
Bit-Interleaving
Pilot Symbols
.