[mythtv-users] UK: managing Freeview and Freesat

[Richard Lainchbury]

On Thu, Apr 7, 2011 at 2:49 PM, Ian Barton <lists at manor-farm.org> wrote:

> On 07/04/11 14:40, Mike Perkins wrote:
> > On 07/04/11 10:57, Nick Morrott wrote:
> >> On 6 April 2011 16:26, Mike Perkins<mikep at randomtraveller.org.uk>
> wrote:
> >>> On 06/04/11 14:42, Nick Morrott wrote:
> >>>>
> >>>> Below is what I posted to the xmltv-dev list in March - the lack of a
> >>>> functioning bathroom at present has temporarily stopped my work on
> >>>> this in the past few weeks, but I will pick it up again in the next
> >>>> week. My current work would seem to do almost everything everyone in
> >>>> the thread is after on a per-platform and per-postcode basis. It is
> >>>> yet to renumber one platform lineups to that of another (to allow easy
> >>>> mixing of multiple platforms on a single system), and leans toward
> >>>> aiding XMLTV configurations (it is part of the XMLTV lineups work),
> >>>> but it also allows matching of digital services by way of service ID.
> >>>>
> >>>> The overall idea for the lineups work is to allow configuration of
> >>>> XMLTV grabbers directly in MythTV via a series of simple
> >>>> question/answers to determine location, TV services and packages
> >>>> subscribed to.
> >>>>
> >>> (snip interesting script example)
> >>>>
> >>> Nick, I hope you'll include code which covers circumstances such as
> mine when
> >>> you finish up these scripts. For a single postcode, DVB-T viewers in
> this area
> >>> (RG14) can receive from three different transmitters - in three
> different TV
> >>> regions - depending on which way the topography allows them to position
> their
> >>> aerials. I'm sure this isn't the only one in the UK.
> >>>
> >>> When using the current xmltv scripts I have to check the result
> afterwards to
> >>> ensure the lineup it has given me corresponds with what I can actually
> receive.
> >>> (The display everything option is very helpful here!)
> >>
> >> One of the issues with adding support for postcode matching is that
> >> the only data we have (which was sourced from ukfree.tv which in turn
> >> was sourced from Sky and the BBC) provides a 1-to-1 mapping between
> >> postcodes and BBC/ITV regions, with no knowledge of other regional
> >> services receivable in a given postcode. I'm guessing that the
> >> estimated strongest signal received in a given postcode is the one
> >> listed. I have already made a few corrections to the mappings when
> >> users have volunteered the information, but there is no knowledge of
> >> transmitters receivable in a location.
> >>
> >> Based on older channels.conf data I think (some please correct me here
> >> if I am wrong) that each of the regional BBC1/ITV1 services on
> >> Freeview has a different service ID, so it should be possible to do
> >> the scan->XMLTV matching against _all_ of the possible regionalised
> >> services and configure the channel seen in the scan. At the moment
> >> however, the scripts use the mappings made available, which as you
> >> have written may not be optimal for all Freeview users.
> >>
> >> Perhaps asking at the outset for the user's BBC1/ITV1 region and then
> >> using this information for more behind the scenes configuration might
> >> help here? This can be used in addition to the user's postcode to
> >> allow for both regional and local TV services to be determined as best
> >> as possible.
> >>
> > I guess if you asked for the BBC and ITV regions you wouldn't need the
> postcode
> > at all... Ah, I see you mention 'local' TV services, whatever they are.
> >
> > I might do some checking of service ids this weekend, see what gets
> thrown up.
> > My aerial can see Hannington, Oxford and Crystal Palace :(
> >
>
> Asking for the region would make sense here. Depending on which way you
> decide to point your aerial, we can receive either Winter Hill (Granada)
> or Wrekin (Midlands). Either would be valid for our post code, but the
> correct answer  would depend on which way you decided to set up your
> aerial. Even this excludes people who choose to have two aerials, so
> they can get both regions.
>
> Ian.
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Does anyone know how current digiboxes decide?

Richard
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