[mythtv] SVN 7245 thinks WB HDTV is encrypted?

Daniel Kristjansson danielk at cuymedia.net
Wed Sep 14 13:20:32 UTC 2005


On Wed, 2005-09-14 at 14:59 +0200, Kenneth Aafl°y wrote:
> Onsdag 14 september 2005 03:58, skrev Daniel Kristjansson:
> "CA_system_ID -- This is an 16 bit field indicating the type of CA system 
> applicable for either the associated ECM and/or EMM streams. The coding of 
> this is privately defined and is not specified by ITU -T | ISO/IEC."
Arg! So this is a hole in the standard...

I found a ATSC standard A/70a http://www.atsc.org/standards/a70a.html
No working link to it on the ATSC page.. (security thought obscrurity ;)
Anyway, it offers no help on the System ID, but it does specify that
the CA descriptor is only required in the PMT and CAT for ATSC.

> Is either "PES packet payload" or transport_scrambling_control set to anything 
> other than 0 in those streams?
The idea was to be able to do this from the tables without looking at
the actual streams..

> It could be that they are getting ready for ppv.
It is illegal for these broadcasters to encrypt main stream.
It looks more like a misconfiguration at the transmitter.

-- Daniel



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