[mythtv] Ticket #2811: BBC Series link patch

Stuart Auchterlonie stuarta at squashedfrog.net
Wed Jan 17 10:32:16 UTC 2007

On Tue, Jan 16, 2007 at 04:49:19PM +0000, David Matthews wrote:
> MythTV wrote:
> > #2811: BBC Series link patch
> > Comment:
> > 
> >  With the default authority, is this used in a similar way to EIT data with
> >  the EITa being the "authoritive" source for that mux, or is the
> >  information
> >  used to form the fully qualified CRID and that info is broadcast
> >  consistently
> >  across the muxes?
> I'm not sure I've understood your question so rather than start a 
> discussion on trac I'm replying to mythtv-dev.
> The full form of a CRID from ETSI TS 102 323 is a URI of the form
> crid://<CRIDAuthority>/<data>
> e.g.
> crid://fp.bbc.co.uk/ABC123
> To save space in the EIT when sending the episode and series IDs it is 
> only necessary to send the data part beginning with a slash ("/ABC123"). 
>   The full CRID is created by adding the "default authority" (and 
> "crid://" to be strictly accurate).  The default authority can be 
> transmitted in any of NIT, BAT or SDT.  Currently it is transmitted on 
> the SDT but it seems they will be transmitting it on the NIT in the 
> future.  I assume that the default authority to be used for the episode 
> or series ID for a particular programme is the default authority for the 
> channel on which the programme will appear, rather than for the 
> transport on which the EIT data is being transmitted.

This is essentially what I was after. That the default authority is
a static bit of information, much like a channel name, but isn't
sent out with the data, rather it's sent out with the other
descriptive information for the channel.

Right, now i can sort this out :)


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