[opendtv] Re: Accurian DTV STB from Radio Shack
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 10 Oct 2005 19:49:38 -0400
Bob Miller wrote:
> And the difference in the business model has
> everything to do with must carry. Without must
> carry broadcasters would not have been as
> complacent in the choice of modulation
This sounds reasonable. Either that, or they
believed that big improvements were right around
the corner. If the latter, we seem to have
rounded the corner.
> Instead of 45% of SUVs with rear seat TV
> screens it would be 95% of all vehicles, the
> success of XM and Sirius would be non existent
> or in serious trouble as the DTV broadcasters
> would be delivering 20 or so channels of
> digital radio mobile also.
That's not so believable. First, because it's
not clear why TV broadcasters would willingly
reduce their TV spectrum to transmit robust
radio streams. Secondly, the appeal of satellite
radio is all about being able to receive
zillions of the same channels *anywhere*, e.g.
while traveling. What you describe would not
provide that kind of continental coverage nor
as many radio channels.
Assume that robust radio requires 1 b/s/Hz.
Each TV frequency allocation would support
about 14 good quality and robust radio
channels (each 384 Kb/s), but only if
dedicated to radio. Not bad, actually, but not
as much as XM Radio and no ubiquitous
continental coverage. And no TV on that
channel, either.
If you want a DTT system that hopes to compete
with cable and DBS, at least somewhat
successfully, I don't see that diluting the
bandwidth for radio support is the right way to
go. Some think that a radical rethink of the
"business model" is the only salvation, so
move away from regular TV delivery entirely,
and change DTT into a mobile service only. To
me, that requires a far greater leap of faith
than what successful European DTT systems have
worked with.
Whether you're talking about TV optimized for
mobile platforms or TV optimized for hand-held
devices, raging success stories that would
eclipse DTT delivery to homes are not exactly
commonplace, are they?
Bert
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