[opendtv] Re: Letter to TV Technology
- From: "Bob Miller" <robmxa@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 8 Oct 2007 09:42:54 -0400
No people will always buy the latest and best receiver if any are
offered. The problem is how do you deploy a new architecture in
broadcasting. How do you deploy an SFN that will confound all legacy
receivers. How is doing that any different than switching to or
allowing a new modulation.
If you allow the deployment of an 8-VSB SFN that will not work with
older receivers why not allow the use of an alternate modulation that
while it also won't work with legacy receivers is far superior to in
every way to 8-VSB/A-VSB?
This has always been the problem with "fixing" 8-VSB. As soon as the
fix makes legacy receivers obsolete in any way you open the door to
the consideration of changing both the modulation and codec.
With DTMB, the Chinese standard, you are talking higher data-rate
reception than 8-VSB and similar data-rate reception than Dibcom
enabled DVB-T. With MPEG4 we are talking multiple HD programs per 6
MHz channel or even 1080P capability.
If we are going to trash far more legacy receivers than we were
talking about in 2000 then why not get more for the trashing than an
iffy SFN capability? Why not get double the data rate and state of the
art reception?
And all that Sinclair asked for was that another modulation be
allowed. That would do no more harm than allowing 8-VSB SFN's. No more
and no fewer legacy receivers would be trashed.
And why not?
Bob Miller
On 10/8/07, John Willkie <johnwillkie@xxxxxxxxxxxxx> wrote:
> So, people won't ever buy newer receivers to improve reception of TV
> signals?
>
> If not, just what is your value proposition with COFDM-t/t2/h/m? What is
> the value proposition of MediaFlo?
>
> I think they'd be willing to spend MUCH MORE money to improve reception in
> their living room than they'd pay to improve reception in their hand.
>
> John Willkie
>
> -----Mensaje original-----
> De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
> nombre de Bob Miller
> Enviado el: Sunday, October 07, 2007 10:37 PM
> Para: opendtv
> Asunto: [opendtv] Letter to TV Technology
>
> Ref: SFN TV Broadcasting in The United States?
>
> http://www.tvtechnology.com/pages/s.0079/t.8845.html
>
> Mr. Hoffman,
>
> One little problem with using SFN's with 8-VSB in the US.
>
> They only work with current generation receivers. This constitutes in
> affect the same thing as changing to a new modulation. The argument
> years ago when only a few thousand legacy receivers existed for not
> allowing or switching to the far superior COFDM based DVB-T was legacy
> receivers.
>
> We have far more legacy receivers today to protect so the argument
> against considering using this NEW 8-VSB that works with SFN's is far
> stronger than it was in 2000 or 2001.
>
> If we decide that we MUST use such SFN networks and in a sense then
> are switching to a new architecture that it all intents and purposes
> is a new modulation that makes all legacy receivers obsolete we MUST
> take advantage of this about face to consider all the latest
> modulations and advanced codecs at the same time.
>
> The logic is unassailable in my opinion. We would double the carrying
> capacity of a channel by going to MPEG4 and could upgrade to the
> Chinese modulation DTMB DTV standard which would give us a high
> data-rate mobile modulation that could deliver 1080P in a 6 MHz
> channel. Think about it, 1080P mobile.
>
> Why be satisfied with just the SFN capability. If we are going to
> finally bury the lame excuse of protecting legacy receivers lets go
> all the way. The extra cost would be minor compared to the incredible
> gains to be had. And we could bury A-VSB at the same time.
>
> Bob Miller
> Viacel Corp.
>
>
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