[opendtv] Re: Brazil

John Shutt wrote:

> I can't wait to read DVB's rebuttal.

Simple: these tests are way obsolete. Check when the tests took place.

> The interesting thing was even in the fixed
> modes, ATSC's C/N advantage did not result in
> better far field reception.  Must have been
> an earlier generation ATSC chipset,

Do you think? Like, first gen receivers?

The interesting thing I learned from those viewgraphs is that ISDB
carries with it a real penalty in C/N margin required, in benign
multipath conditions. Like, 5 dB worse than 8-VSB, which I think is
getting to the point of being a real issue. Especially in a country
whose land mass is about half of the entire South American continent.

ATSC did itself a heck of a disservice by pushing undeveloped products
early on. That legacy is hard to shake. Also, one wonders why the
patents on 8-VSB receivers are even valid anymore, when it seems obvious
that some key early design concepts, e.g. the supposed advantage of
being able to use real-only equalizers, training methods, did not pan
out at all. If decent receivers can't be designed as originally intended
by 8-VSB patent holders, there ought to be some recourse.

Bert
 
 
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:

- Using the UNSUBSCRIBE command in your user configuration settings at 
FreeLists.org 

- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word 
unsubscribe in the subject line.

Other related posts: