[opendtv] Re: Disney to Sell Moviebeam

John Shutt wrote:

>The press release said unused portions of the television spectrum, not 
>unused portions of the television picture.  MovieBeam is/was not based on 
>vertical interval blanking.  It was based on placing digital information in 
>the spaces between the Visual and Aural carriers.
>
>www.dotcast.com
>  
>


That web site implies that TV sets use some sort of synchronous (PLL?) 
detection of the
video. Huh? I've never seen a TV schematic that did not use a plain 
diode detector. Of course,
I stopped looking before ICs arrived. What the web page describes is a 
kludge QAM
system.

Doug McDonald


 
 
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