Home of Professional Cinematography since 1996

Uprez 720

Published : 19th November 2003


I never thought I'd actually respond to a discussion with this title, as no one has ever demonstrated that Newtons Laws of Physics are true in ever instance except video. Uprezzing works very well for purposes of format convenience but there is no free lunch. If you transfer 10 gallons of video from a 2" pipe which holds exactly that amount of video to a 4" pipe, which is now half full, there is still only 10 gallons of video. You can adjust the flow rate to make it appear that the 4" pipe is full, or you can simply wish upon a star, but there is still 10 gallons of video there.

Having said that, 720 does "uprez" very well to 1080 especially if the 720 is P and the 1080 is I. Or if the 720P is True Frame Progressive and the 1080P is not...

And on the subject of computer villages, it does not take a computer village to raise a film. S-Two's business is based on reusable / rotatable digital (hard disk) mags which are used, then ingested directly into the workflow of post or thru any of a number of intermediate digital holding tanks, limiting the on-set data storage devices to a manageable, film mag style cache. It needs some tweaking, yes, but what HD technology didn't even two years ago.

GEORGE C. PALMER
HDPIX, INC.
HD and Digital Imaging Services
www.hdpix.com



George Palmer wrote :

>Or if the 720P is True Frame Progressive and the 1080P is not...


George

What does 480P on the LDK 2000 and TrueFrame Progressive, a Phillips brand name have to do with upressizing 720 to 1080?

A not so clever way of saying "not Progressive Segmented Frames" Oh do I hope the weasels aren't back with their weasel words.

Michael "doesn't want to hear that Psf isn't really progressive…again" Bravin
Chief Technology Officer
Band Pro Film & Digital
www.digiprimes.com



Michael Bravin wrote :

>For the use of quoted middle name, a donation will be made to Jeff >Kreines' mag attachment for the Arri HD cam project.

Ha!

Before I did that, I'd build a 400 foot mag for my A-Minima...

Besides, Arri is working with BayTech on a RAM recorder for the Arri camera.

However, Michael, your tab is getting quite expansive...

Jeff "tabs by Dalsa?" Kreines



George C. Palmer wrote :

>Or if the 720P is True Frame Progressive and the 1080P is not...

Say what?

A progressively captured frame is a progressively captured frame, no matter how it's recorded on tape (or disk, or film).

Even if it's recorded in a segmented-frame format -- that's merely a storage medium.

Jeff "loves to bash Sony, but only when appropriate" Kreines



The point is you can't get more resolution than the original by uprezzing.

GEORGE C. PALMER
HDPIX, INC.
HD and Digital Imaging Services



I'm not really all that concerned as to whether the Sony 900 outputs a truly-true progressive frame or not, as I'd never use that camera in a million years. It's too big, it's overloaded with controls, and it throws too much information away.

Jeff Kreines