When two or more stations are transmitting the same programming, it
would save bandwidth (bits) if, when a viewer/listener selects one
bitstream (station), their receiver was directed to another if it was simulcasting at that point.

It's a feature omitted from FreeView - the "red button" comes close, but
still obliges the viewer to take some action - and I'm pretty sure
wasn't in the original DAB.

Is it in DAB+? It would make more sense there; on FreeView, stations
have their allocated bitstreams, so it's _less_ needed (though still intellectually unsatisfying) there, but I believe DAB and DAB+ switch
bitrates quite a lot anyway, so it'd make sense for it to apply there -
then the available "bandwidth" could be used to give other stations
better quality when simulcasting was happening.

The only technical snag I can think of is problems telling the listeners
whose receiver has been switched, to switch back at the end of the joint programming; this could easily have been taken account of by having just
a few bytes in the bitstream to identify either which "stations" are
being carried, or that it's time for the receivers of listeners who
think they're listening to another station, to switch back; but I won't
be at all surprised to hear the standard does _not_ have any such
provision.
--
J. P. Gilliver. UMRA: 1960/<1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

Anyone can do any amount of work provided it isn't the work he is supposed to be doing at the moment. -Robert Benchley, humorist, drama critic, and actor (1889-1945)

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Would this not be a problem with national stations with local adverts?

I find myself not listening to what I call Radio Clone in the UK, since most
of it has degenerated into bland formmular radio because they think thhe advertises want that. Most would probably rather listen to white noise...
grin.

Brian

--

--:
This newsgroup posting comes to you directly from...
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Note this Signature is meaningless.!
"J. P. Gilliver (John)" <G6JPG@255soft.uk> wrote in message news:2GkN2D$$3uwiFw15@a.a...

When two or more stations are transmitting the same programming, it would save bandwidth (bits) if, when a viewer/listener selects one bitstream (station), their receiver was directed to another if it was simulcasting
at that point.

It's a feature omitted from FreeView - the "red button" comes close, but still obliges the viewer to take some action - and I'm pretty sure wasn't
in the original DAB.

Is it in DAB+? It would make more sense there; on FreeView, stations have their allocated bitstreams, so it's _less_ needed (though still intellectually unsatisfying) there, but I believe DAB and DAB+ switch bitrates quite a lot anyway, so it'd make sense for it to apply there -
then the available "bandwidth" could be used to give other stations better quality when simulcasting was happening.

The only technical snag I can think of is problems telling the listeners whose receiver has been switched, to switch back at the end of the joint programming; this could easily have been taken account of by having just a few bytes in the bitstream to identify either which "stations" are being carried, or that it's time for the receivers of listeners who think
they're listening to another station, to switch back; but I won't be at
all surprised to hear the standard does _not_ have any such provision.
--
J. P. Gilliver. UMRA: 1960/<1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

Anyone can do any amount of work provided it isn't the work he is supposed
to
be doing at the moment. -Robert Benchley, humorist, drama critic, and
actor
(1889-1945)

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)