DVB Board Ratifies Specification for Second Generation DTT Transmission
July 22, 2008 // Published as a news service by IHS
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The Digital Video Broadcasting (DVB) Steering Board ratified and published the DVB-T2 specification, which is a second generation transmission system for digital terrestrial television.
The specification introduces modulation and coding techniques to enable use of terrestrial spectrum for the delivery of audio, video and data services to fixed, portable and mobile devices.
Building on the foundations of the DVB-T system, DVB-T2 is designed to provide 30% to 50% increase in capacity in equivalent reception conditions, according to the DVB Project.
DVB-T2 uses orthogonal frequency division multiplex (OFDM) modulation and offers a range of different modes.
It employs the same low-density parity-check (LDPC ) codes used in DVB-S2 for error correcting performance in the presence of high noise levels and interference, said the DVB Project.
Features include physical layer pipes, support of multiple-input-single-output (MISO) and rotated constellations.
DVB-T2 was defined so that the standard can be enhanced in the future in a backwards compatible manner through the use of future extension frames, said the DVB Project.
The specification will be submitted to the European Telecommunications Standards Institute (ETSI) for approval.
Vendors are working on the design of DVB-T2 equipment with the first prototypes expected by the end of 2008.
In parallel, further work will be required within the DVB Project and elsewhere on the creation of implementation guidelines and validation testing.
Source: DVB Project.