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Posted by Jeff Rife on 04/15/06 17:01
~P~ (bmxtrix2005@cox.net) wrote in alt.tv.tech.hdtv:
> ??? - You are saying that film isn't stored on DVD at 480/24i?
Yes. For region 1 DVDs, the *only* legal encoding is 60i. There are
various geometries allowed, but *all* require 30 interlaced frames per
second (i.e., 60 interlaced fields per second). For some other regions,
50i is the only legal rate.
> This goes in direct contrast to what the link YOU provided states and which
> I quoted.
No, you just can't read.
> I am not sure what the MPEG2 header says - or what that has to do with what
> is actually put on the disc itself
Based on this, you also don't understand what any of what I have said
means.
> do you have any links or quotes from
> articles that has something to do with the header - since the very detailed
> page you linked to doesn't talk about the header at all.
Perhaps you could close your mouth for once and learn to do actual
research, instead of only being able to skim references that other people
must spoonfeed you.
> I can assure you
As we know by now, your assurances in *anything* technical are worthless.
> that DVD players pull off the frames in a flagged sequence that is
> specifically called 3:2 pulldown or 2-3 pulldown (depending on where you
> read it). Either way, this work is performed by the DVD player processing.
There is *no* "work" involved. The MPEG-2 decoder merely takes the next
field (NOT "frame") and outputs it. If that field is flagged to be the
same as the previous matching field (odd or even), then it outputs the
same thing as it did 1/30th of a second ago. There is *no* extra work
involved, as material encoded without repeat field flags is handled in
*exactly* the same way. Thus, the player is not performing "pulldown"
of any kind...that was already done in the encoding.
--
Jeff Rife |
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