From
http://en.wikipedia.org/wiki/DVB-T2
Γενικά καλύτερο bit rate
1)Forward Error Correction (FEC)
DVB-T
Convolutional Coding + Reed Solomon 1/2, 2/3, 3/4, 5/6, 7/8
DVB-T2
LDPC + BCH 1/2, 3/5, 2/3, 3/4, 4/5, 5/6
2)Modulations
DVB-T
QPSK, 16QAM, 64QAM
DVB-T2
QPSK, 16QAM, 64QAM, 256QAM
3)Guard Interval
DVB-T
1/4, 1/8, 1/16, 1/32
DVB-T2
1/4, 19/256, 1/8, 19/128, 1/16, 1/32, 1/128
4)Discrete Fourier transform (DFT) size
DVB-T
2k, 8k
DVB-T2
1k, 2k, 4k, 8k, 16k, 32k
5)Scattered Pilots
DVB-T
8% of total
DVB-T2
1%, 2%, 4%, 8% of total
6)Continual Pilots
DVB-T
2.6% of total
DVB-T2
0.35% of total
For instance, a UK MFN DVB-T profile (64-QAM, 2k mode, coding rate 2/3, guard interval 1/32) and a DVB-T2 equivalent (256-QAM, 32k, coding rate 3/5, guard interval 1/128) allows for an increase in bit rate from 24.13 Mbit/s to 35.4 Mbit/s (+46.5%). Another example, for an Italian SFN DVB-T profile (64-QAM, 8k, coding rate 2/3, guard interval 1/4) and a DVB-T2 equivalent (256-QAM, 32k, coding rate 3/5, guard interval 1/16), achieves an increase in bit rate from 19.91 Mbit/s to 33.3 Mbit/s (+67%).[18]