[opendtv] Re: Disney to Sell Moviebeam
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 26 Sep 2005 14:00:18 -0500
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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