[opendtv] Re: New Thread: What becomes of Legacy Analog Equipment

  • From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Tue, 27 Nov 2007 14:25:29 -0500

Bob Miller wrote:

> Yes all current STMB or DVB-T systems are saddled with
> legacy receivers but not idiotic ways of thinking about
> updating their systems.

All systems are saddled with legacy the same way. So all will be very
careful when they do decide to upgrade.

One *good* thing about 8T-VSB is that we can benefit from smarter
receivers right away, without having to change the transmission
standard. And that is because when 8T-VSB was invented, the receivers
just were not smart enough to demod the signal very well. In other
words, the system was set to a higher spectral efficiency than the
receiver technology could work with reliably.

In a sense, that can be good. As we discussed years and years ago,
Moore's Law works to the advantage of ATSC in this regard.

Before going on with the inflexibly negative comments, I would think the
naysayers would consider how off they were on so many facts. For
example, indoor reception that was originally deemed practically
impossible, or reception in Rayleigh channels that was originally deemed
imnpossible, or reception in Brazil E specifically that the know-it-alls
declared would never be possible with 8T-VSB, or SFN applicability, or
availability of a HM-like mode, or cost, or power requirements.

At some point, one would think people would pause before making
inflexible declarations?

Bert
 
 
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