Markus Rechberger wrote:
Anyway do you know the exact difference between DVB-T in Australia and
other countries?
I can answer that. AS4599 and AS4933 are the standards for DVB-T in
Australia. It is basically ETSI standard DVB-T. It defines the
meanings of content descriptors and ratings and introduces descriptor
0x83 for the recommended channel (which I think is a UK standard), none
of which should impact on the driver. It also defines which streams
should be used for various formats. There is a lot to do with PAL
compatibility (for set top boxes etc)
The actual frequencies for broadcast are the same channels as used for
analog. All channels are 7Mhz (except UHF27 which is only 6MHz and not
used although it /might/ get used in the future for radio). Long term
the ACMA want to use SFN but I don't know if anyone does yet. Channels
may use (with the permission of the ACMA) a +/-125kHz offset to prevent
interference with other services etc. The channels suitable for DVB-T
range from 177500000 through to 816500000 (center frequency)
Transmission may use 2k or 8k COFDM carrier. Transmitters may use
hierarchical modes but I don't think any currently do.
Basically, the major difference is 7Mhz channels.
I have done a lot of research on DVB-T in AUS if anyone whats more details.
John.
Markus
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