[opendtv] Re: Toward digital TV

  • From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Fri, 16 Dec 2005 16:39:54 -0500

John Shutt wrote:

> Hey Bert,
> What do you think COFDM receivers have done in the past
> couple of years, with literally tens of millions of
> units sold worldwide?  Their development haven't stood
> still either.

Hey John, there's a difference. The early 8-VSB receivers
were fairly completely inadequate, what with their echo
tolerance limited to 0 to +15 usec. So improvements on
these early designs was bound to be dramatic. More so
than improvements on a design which is already inherently
capable of reasonable symmetric echo toilerance, even in
2K mode.

Everything is a S curve. If you start at the bottom of
the S curve you're bound to see more dramatic improvement
than if you start a good way up.

> Bob Miller is right, and today's COFDM outperforms
> today's 8-VSB just as it did in 1999.

And I repeat that I am uninterested in professions of
faith, but very interested in real comparison results.

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