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Old 16th April 2010, 19:36   #211  |  Link
guth
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Join Date: Apr 2003
Location: Uppsala, Sweden
Posts: 157
Quote:
Originally Posted by Dogway View Post
Because if I have the black bars (NAB) I would have to assume 704 width, therefore indicating my source is PAR 0.909. So my question is whether this only applies for direct digitalization (analog->digital) or it stands as well for DVD's digital content previous digitalized. Otherwise I would just need to assume PAR 0.888. I mean, I would like to know what do I have to base on to know if the manufacturer assumed 0.888 or 0.909. Mainly because when I do play any DVD (NTSC) on my laptop the object geometry is the same as using 0.888, and in practice it feels more natural than 0.909. Manufacturers must be doing it wrong?
I'm no expert on this subject, but I don't think the black bars tell you anything about the PAR. The table on the page I referred to above says that the sampling matrices 720x486, 720x480, 711x486, 704x486 and 704x480 all share the same PAR, namely 4320/4739. The table also mentions DV, DVB and DVD for that PAR.

If you think 0.888 looks better, maybe you're fooling your brain to think so, because you want it to be that way, or maybe you're used to looking at video like that, or... maybe the manufacturers are wrong. But I really don't think 0.888 is ever the correct PAR to use (except for correcting other's mistakes).
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