Invisible wrote:
> Well, the article states that it's supposed to resist somebody pointing 
> a video camera at their TV screen, so a 1-pixel alteration won't do.

Probably different watermarks encoded, without actually looking visibly 
different in a way you could tell. Otherwise, someone might just rip it 
twice and change the file to use (say) 1364 frames of ocian.

-- 
   Darren New, San Diego CA, USA (PST)
   I ordered stamps from Zazzle that read "Place Stamp Here".

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