[opendtv] Re: STB hunting

  • From: cbenham@xxxxxxxxxxx
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Mon, 23 Jan 2006 18:05:29 +0000

 -------------- Original message ----------------------
From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
> >> A simple change of *one* component, the demod, makes a DVB-T
> >> box into an ATSC box.
> >
> >Doubtful. This is an oversimplification if I've ever heard one.
> Do yourself a favor. Study this:
> http://www.st.com/stonline/products/literature/bd/11219.pdf
> and pay particular attention to Figures 1-3.
> Remember that the "tuner" they show in the block diagrams comes
> in all-standards formats from several manufacturers.

But will they work with 8VSB as well as with COFDM? 
John Shutt just answered this question quite well:

He wrote:
"And yet it is that one simple component that has caused the entire US 
Digital transition to be stalled since 1999 while we wait for it to be 

The problem is, even when it is "perfected" it still won't perform as well 
as a COFDM receiver in a real world application.  Media-Flo and DVB-H are 
multi-carrier solutions.  DAB is a multi-carrier solution.  IBOC is a 
multi-carrier solution.  ISDB-T is a multi-carrier solution.  Even the 
Digital Television Systems in development in China are multi-carrier 
solutions.  For wireless broadcasting, I sense a trend in modulation 
schemes, but I can't quite place my finger on what all other standards have 
in common."

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