I think you are talking about DVB-T  this quote from 
http://en.wikipedia.org/wiki/DVB-T
 
"Time and frequency synchronization: the digital base band signal is searched 
to identify the beginning of frames and blocks. Any problems on the frequency 
of the components of the signal are corrected, too. The property that the guard 
interval at the end of the symbol is placed also at the beginning is exploited 
to find the beginning of a new OFDM symbol. On the other hand, continual pilots 
(whose value and position is determined in the standard and thus known by the 
receiver) determine the frequency offset suffered by the signal. This frequency 
offset might have been caused by Doppler effect, inaccuracies in either the 
transmitter or receiver clock, and so on."
 
This would imply that it is possible but haven't seen a device, we have ATSC 
here and the government is making cheap converters available maybe I should 
explore one.

GPS based standard would be the most common now.


----- Original Message ----
From: david brown <[EMAIL PROTECTED]>
To: time-nuts@febo.com
Sent: Wednesday, April 16, 2008 11:25:21 AM
Subject: [time-nuts] Digital TV signals

>From a complete amateur, is there any useful timing info to be gained 
from the newer format of digital tv transmission(Australia) to replace 
that available from current analogue transmissions.? My recently 
repaired TV derived frequency standard looks to  be becoming obsolete! 
David

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