[opendtv] Re: PBS National Datacast

Richard Hollandsworth wrote:

>Excuse me if I've been a llittle confused.  The below cited
>Moviebeam press release via Webwire says that Moviebeam
>is using National Datacasting technology.  And the National
>Datacasting website says that they employ PBS's DTV
>stations, with no mention of the older dotcast technology
>on NTSC PBS stations.

Not quite accurate, on that last point, Richard.

http://www.pbs.org/digitaltv/dataNS.html

talks about "current services" and "the digital difference," in which 
service over DTT "will begin" at some unspecified time. And "current 
services" are obviously over analog, although only the VBI technique is 
mentioned. So National Datacasting is somewhat agnostic about the physical 
layer details.

I think it's basically what John Shutt "stands by," although I seriously 
dount that PBS thinks Dotcast provides better coverage than ATSC can.

Bert

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