On 26/03/2008, Steve Jolly <[EMAIL PROTECTED]> wrote: > > Brian Butterworth wrote: > > On 26/03/2008, *Andrew Bowden* <[EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]>> wrote: > >> Each region however has its own, permanent, dedicated video stream > >> which broadcasts 24/7. I can't think of any channel on Sky which > >> reconfigures its video configuration on the fly (e.g. bandwidth, > >> bitrate, number of audio channels etc) > > > > Aside from the obvious point that there are number of channels that > > don't broadcast the whole day (BBC three, BBC FOUR, CBBC, CBeebies) that > > go to low or bitrate services AND the even more obvious point that the > > channels are statisitcially multipelxed together and therefore change > > bitrate on the fly the whole time. > > I think that of all the (15-odd) BBC 1 variants broadcast by satellite, > only the London region is statmuxed, isn't it? That's a lot of HD > services to find room for, and a very big (and expensive) upgrade to the > BBC's DSAT broadcast chain.
I think you are confusing Freeview with Freesat. On Freesat the multiple services are statmuxed together, on Freeview BBC ONE is in 4.9Mb/s, apart from Scotland, Wales and NI where the extra two radio channels mean the whole of mux 1 is statmuxed. As I said, ideally the BBC One (London) and BBC Two services would form the foundation of BBC ONE HD and BBC TWO HD, but it would be brilliant if they could switch to the MPEG 2 SD transmissions for the regional news. I'm sure ITV1 HD would LOVE to do the same, especially for all that regional advertisting they are required to do... So, there may be a slight frame pause going to the news at 6:28, 6:58, 7:28, 7:58, 8:28, 8:58, 13:30, 15:28, 18:30, 19:59 and 22:25, but it would be a better way of sorting out the problem - well, cheaper. It's hardly rocket science! A simpler way to get a similar effect would be to tell the receiver when > a programme was being simulcast in HD on a different service, so that it > could automatically switch over to it at the appropriate moment, if > that's what the user wanted, and back again at the programme's end. I > think TV-Anytime supports that kind of thing in the related content > table, IIRC. That would have the same effect, but I personally would perfer to have my content in MPEG4 rather than MPEG2. S > > - > Sent via the backstage.bbc.co.uk discussion group. To unsubscribe, please > visit http://backstage.bbc.co.uk/archives/2005/01/mailing_list.html. > Unofficial > list archive: http://www.mail-archive.com/[email protected]/ > -- Please email me back if you need any more help. Brian Butterworth http://www.ukfree.tv
