Adobe PPro question (High quality vs Progressive High quality)

In Adobe PPro Export to DVD...
What's the difference between "NTSC DV High quality 4Mb VBR 2pass"
and
"NTSC Progressive High quality 4Mb VBR 2 pass" ?

 

Progressive High Quality creates a "Progressive scan" DVD. As in one frame
for each frame as opposed to upper and lower fields.

If you have a progressive scan DVD player and an HDTV (others might work
too) you can actually WATCH progressive scan DVD's.

They have been totally out distanced by HDTV and the like.

Tom P.

 

Can this "Progressive scan DVD" then not be viewed on a normal, interlaced
DVD player and TV?

Is it even worth generating a "Progressive scan DVD", assuming that source
material is interlaced (e.g. all DV footage)?


The other question I have is, if you actually can make a Progressive scan
DVD, would you ever want to? I mean, newer DVD players can convert to
progressive scan, HDTV's will convert to progressive scan (typically), and
computer DVD software players have similar algorithms to deal with this.
Why would you want the DVD to do the conversion, when the display devices
may have better converters anyway?

Not a rant, just curious so that I may understand the advantages of this...

TIA.

 

Yes, it can but it will be turned back into an interlaced picture and all
the picture artifacts that go along with that.

Yes. Programs like PPro and others already analyze the fields in the clip
and present them as one frame (one frame of DV is actually two interlaced
fields). There are camcorders out now that can shoot progressive (Cannon
XL2, Panasonic DVX-100A) which is better but the programs do a darn good
job. I can't remember ever seeing a moire on anything I've shot.

The argument being, PPro can take it's time and really analyze the frame and
it's component fields and apply various edge finding algorithms and so
forth... really do a good throughou job of turning interlaced into
progressive. The DVD player or TV or what have you has less than 1/60th of
a second (considering all the other stuff that is going on, considerably
less) to translate the image AND present it on screen. They may have
hardware converters but they may not be any better than being able to spend
a full minute doing difference algorithms between fields.

It's that extra time that can be spent figuring out as much as possible that
is the difference.

At least as I understand it anyway.

Tom P.