[opendtv] Re: Out of market coverage
- From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 25 Sep 2008 09:09:12 -0700
I just started coding data structures for the (probably) soon-to-be-released
ATSC M/H candidate standard last night. It's interesting see how the
document permits inter-market and even intra-market services.
But Craig, I think you might be engaged in legacy thinking when you refer to
"networks" as you speak of national networks. With the proper standard, new
networks could be deployed (aside from the business considerations) by
simply plugging content streams in.
It's somewhat difficult to do that today with MPEG-2, due to the need to
assign non-conflicting packet ids, which either means a lord and master as
"pid assignment overseer" or each station needing some type of (dynamic or
static) "pid remapper". Then, there's the matter of getting all the PSIP
generators working together (even for a few seconds), and getting EPG events
populated and linked together in PSIP.
Wouldn't it be "cool" if there was a broadcast infrastructure that was built
around a standard that had contemplated these issues and provided easy
solutions?
Will it happen? Time will tell.
John Willkie
-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de Craig Birkmaier
Enviado el: Thursday, September 25, 2008 5:53 AM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: Out of market coverage
At 4:28 PM -0400 9/24/08, Manfredi, Albert E wrote:
>
>I'll grant you this, though. Possibly with the much longer GI of DVB-T2,
>a "proper" SFN up and down the East Coast would become more feasible. Of
>course, that would only work with a network-based system, not local
>affiliates.
I believe there is plenty of room for both. It would actually be
easier to create local markets using SFNs because of the ability to
better control the power and direction of the emissions. And there
would be more channels available in each "market" since it would be
possible to re-use channels more efficiently (less concern about
high power levels reaching distant markets.
Every market could have the full complement of national networks AND
some channels with local services. This is just a matter of
determining local market boundaries and designing the network
contours to accommodate this.
The big question is whether the national networks would still choose
to use local affiliates? And then there is the question of how much
localism could be supported economically if the networks were
delivered as a national service?
Regards
Craig
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