Progressive Segmented Frame? Someone explain.

[dbzgundam]

http://en.wikipedia.org/wiki/Progressive_segmented_Frame

If I'm reading this correctly, the frames are stored as actual frames, but halved into fields upon playback? If this is a "replacement" for 3:2 pulldown, what's the advantage to anyone who knows more on this?

[Awatef]

Nothing really new or revolutionary.
Many PAL DVDs are stored that way. DGIndex reports "Interlaced" but you don't see interlacing at all, since it is a progressive stream stored in interlaced form.
The best way remain to encode progressive all the way through, I don't know any DVD player that can't deal with progressive encoded stuff, in all possible framerates: 23,976 - 25 or 29.97fps

[dbzgundam]

Hmm, could this be used for some kind of VFR implementation?

[foxyshadis]

You have double the base framerate available, abuse at will. It's simple enough to convert any VFR video into 60i or 50i, with blending or stuttering, and it's not like hundreds of other movies haven't done it.

Although it's no longer "Progressive Segmented", it's just "Messed Up".

[Mug Funky]

is that what the little "s" stands for?

i get tons of PAL tapes that have that written on them. they're always progressive... i guess they've been transferred from NTSC (or HD) PsF and sped up.

i guess it's just the pro way of saying "progressive" even though you're using media that could be interlaced (for example, digital betacam stores 4:2:2 yuv, which is ideal for interlaced and progressive alike).

in theory you could store it on VHS too, but timebase problems would mean you get combs anyway.