RFDVB-T vs. DVB-T2: Key Differences Explained
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This page compares DVB-T and DVB-T2, highlighting the key differences between them.
Introduction to DVB
DVB (Digital Video Broadcasting) is a widely used terrestrial digital video standard. Its popularity has grown with the decreasing costs of DVB receivers. DVB has been adopted for its higher transmission capacity, which addresses spectrum scarcity issues.
DVB-T and DVB-T2: An Overview
The initial version of the standard is DVB-T, while DVB-T2 is a later, more advanced version. DVB-T2 offers greater capacity, improved spectral efficiency, and enhanced robustness. Regions already using DVB-T can easily migrate to DVB-T2. Both DVB-T and DVB-T2 use OFDM modulation. They support various bandwidth options, modulation/FEC rates, multiple carriers, and multiple guard intervals. As shown in the table below, DVB-T2 supports more options compared to DVB-T, including multiple PLPs, LDPC coding, and MISO.
DVB-T vs. DVB-T2: Key Differences
The following table summarizes the differences 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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