SVP UDR-70, User Manual

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UDR-70 H.265 Portable Receiver
USER’S MANUAL V1.0
D.2. DVB-T2
DVB-T2 is the world’s most advanced digital terrestrial
television (DTT) system, offering more robustness, flexibility
and at least 50% more efficiency than any other DTT system. It
supports SD, HD, UHD, mobile TV, or any combination thereof.
D.2.1. How Does It Work
Like its predecessor, DVB-T2 uses OFDM (orthogonal frequency
division multiplex) modulation with a large number of subcarriers
delivering a robust signal, and offers a range of different modes,
making it a very flexible standard. DVB-T2 uses the same error
correction coding as used in DVB-S2 and DVB-C2: LDPC (Low Density
Parity Check) coding combined with BCH (Bose-Chaudhuri-
Hocquengham) coding, offering a very robust signal. The number of
carriers, guard interval sizes and pilot signals can be adjusted, so that
the overheads can be optimised for any target transmission channel.
D.2.2. DVB-T2 New Features
The DVB-T2 standard has several improvements in comparison with
the DVB-T standard.
FEC coding
In the error correction stage, the DVB-T2 standard implements a
combination of LDPC codes with BCH codes. LDPC codes allow a close
performance to Shannon limit and the BCH codes are used to
eliminate the floor error of the LDPC codes.