It's a good idea actually. I'll dig out what I've written and stick it
as a text file on my webspace
>
> I can see that there is the extra complication for terrestrial that
> BBC One and Two HD are combined with non-BBC ITV, CH4 and Five
> channels to form the PSB3 mux. But there are regional versions of
> this, because ITV HD is regional. Are there as many ITV HD regions on
> terrestrial as there are on ITV SD?
No, currently I think STV West, HTV Wales (? not sure) Ulster, Granada,
Central West, Meridian SE, and London. So in England PSB 3 has four HD
macro regions. The BBC could use those for their corresponding regions
without too much faffing about (well, extra codec cards), but then (for
instance) they'd end up with BBC West Midlands going out in Devon and
Cornwall, because ITV do the same for Central.
>
> Are regional BBC news studios fitted with HD cameras yet, in
> anticipation of regional BBC One HD?
It's not just the cameras that need upgrading, it's the vision mixer,
station router, graphics engines, servers, etc etc
London, Salford, and Plymouth have been ready for some years, I think
Cambridge is also ready. Southampton was done in November. Newcastle is
next on the list.
However, I don't think all of them will ready in time for the great
switch on this autumn. And they don't need to be, those not converted
can just appear as upscaled SD until they are done.
>
> Was BBC One HD originally envisioned as not being regional, with
> regional news only on BBC One SD, and now BBC are facing calls for
> regional HD. Or was regional HD part of the plan all along but it's
> taken them a lot longer to implement it than ITV?
ITV did all their regions about 10 years ago. They adopted a new
production workflow and template, and they all natively output in HD.
The Beeb were way behind with that process, and only really decided on
the template very recently. So ITV are ahead of the game.
All of the ITV regions except for Border:Scotland and Channel TV are
available on satellite in HD.
However, in order to accommodate their regions in HD, they've reduced
the number of regions in SD via satellite.
I can't imagine the BBC doing that in the short term,
>
>
> How much spare transponder space is there on satellite, to accommodate
> regional BBC One HD in the same way as there are some (*) ITV HD regions?
Not sure !