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.
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.
S
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