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...the copy-protection is quite visible during retrace/vertical blanking on all my sets when you look at the scope, but is only visible 'on screen' on some of them. (btw, is this Macrovision on dvd or something else.)
I think a lot depends on the set's video output circuitry, many old tv's tend to blank this out along with the rest in the VBI but others have obnoxious lines at the top.
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