Difference between DVB-T and DVB-T2 | DVB-T vs DVB-T2
This page compares DVB-T vs DVB-T2 and mentions difference between DVB-T and DVB-T2.
Introduction:
DVB (Digital Video Broadband) is widely used and deployed terrestrial digital video standard.
It has become more popular due to reduction in prices of DVB receivers.
It has been adopted due to its higher transmission capacity to address
issues such as scarcity of the spectrum.
DVB-T and DVB-T2
Initial version of standard is DVB-T and later and more advanced version is DVB-T2. DVB-T2 offers more capacity, more spectral efficiency and more robustness. All the regions which have been deployed with DVB-T can easily be migrated to DVB-T2.
OFDM modulation is used in DVB-T and DVB-T2 technologies. Various bandwidth options, modulation/FEC rates, number of multiple carriers, multiple guard intervals are supported. As shown in the following table, DVB-T2 supports more options compare to DVB-T. DVB-T2 supports multiple PLPs, LDPC coding, MISO etc.
Difference between DVB-T and DVB-T2
Following table summarizes difference between DVB-T and DVB-T2.
| Features | DVB-T | DVB-T2 |
|---|---|---|
| FEC coding | Convolutional coding + RS : 1/2, 2/3, 3/4, 5/6, 7/8 | LDPC + BCH : 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 |
| Modulation | QPSK, 16QAM, 64QAM | QPSK, 16QAM, 64QAM, 256QAM with constellation rotation |
| Guard Interval | 1/4, 1/8, 1/16, 1/32 | 1/4, 19/128, 1/8, 19/256, 1/16, 1/32, 1/128 |
| FFT Size | 2K, 4K, 8K | 1K, 2K, 4K, 8K, 16K, 32K |
| Scattered pilots | 8% of total | 1%, 2%, 4%, 8% of total |
| Continual Pilots | 2.0% of total | 0.4%-2.4% |
| Bandwidth | 5, 6, 7, 8 MHz | 1.7, 5, 6, 7, 8, 10 MHz |
| Typical data rate | 24 Mbit/s | 40 Mbit/s |
| Max. data rate ( @ 20dB C/N ) | 31.7 Mbit/s | 45.5 Mbit/s |
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