[linux-dvb] New UK DVB-T broadcasts

[Dave Chapman <dave@dchapman.com>]

Hello,

For UK DVB-T users - the 3 "ex-ITV Digital" multiplexes (B, C and D)  are now 
broadcasting using QAM 16, Code Rate 2/3.  

At the moment, these multiplexes are either broadcasting test channels, or 
nothing at all.  For example, the Crystal Palace transmitter in London is 
broadcasting a test channel on Multiplex B (the BBC's new multiplex), and 
nothing on C and D..

The other 3 multiplexes (1, 2 and A) are still broadcasting using the old QAM 
64, Code Rate 3/4 parameters.  The latest rumours are that multiplex 1 (BBC) 
will switch to QAM 16 sometime in October, but that multiplexes 2 and A will 
remain at QAM 64 for the foreseeable future.

If my information is correct, QAM 16, Code Rate 2/3 gives a bandwidth of 18 
Mbit/s, and QAM 64, Code Rate 3/4 gives 24 Mbit/s.

For VDR users, these changes mean that VDR needs patching to allow different 
DVB-T parameters (at least QAM and Code Rate) on a channel by channel basis.

Regards,

Dave.


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