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Author Topic: Are digital intermediates uncompressed? Greg Anderson Jedi Master Film Handler Posts: 766 From: Ogden Valley, Utah Registered: Nov 1999 posted 05-30-2006 04:12 PM                        I saw a presentation at NAB last month in Las Vegas. At the time, I thought it was "4K" because the resolution was 7680 by 4320 with 22.2 channel sound (4x the horizontal and 4x the vertical resolution of HDTV... or 16x the total resolution). But now I see that it was actually NHK's "Super Hi-Vision" and actually a step above this 4K that you folks are discussing. Hmmm. Anyway, it was very nice stuff. This is what I always thought HDTV and/or Digital Cinema should look like. But I have no idea when anyone plans to produce or present any feature-length stuff in 7680 by 4320.  |  IP: Logged Mike Schindler Phenomenal Film Handler Posts: 1039 From: Oak Park, IL, USA Registered: Jun 2002 posted 05-30-2006 06:33 PM                     jhawk, For video, it's common to express picture quality in terms of lines of horizontal resolution. I assumed that lines of vertical resolution would be the easiest way to express what 4K is a value of.  |  IP: Logged Ron Curran Jedi Master Film Handler Posts: 504 From: Springwood NSW Australia Registered: Feb 2006 posted 05-30-2006 07:52 PM                        Totally agree, Bobby. While we are at it, why do we have 4x3 and 16x9 when proper aspect ratios are 1.37, 1.85 and 2.35? and why do we have 8, 16, 35, 65 and 70 milimeter film when people insist on expressing image areas in fractions of an inch? Is the intention to confuse?  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 05-30-2006 08:35 PM                     Just remember, Ron, the world is not as it seems. Dimension A is 1.377 +/- 0.001 inches, or 34.975 +/- 0.025 mm, per SMTPE 139 (SMPTE STANDARD for Motion-Picture Film (35-mm) ---- Perforated KS). So 35mm film is not 35mm wide. --jhawk  |  IP: Logged Bobby Henderson "Ask me about Trajan." Posts: 10973 From: Lawton, OK, USA Registered: Apr 2001 posted 05-30-2006 09:02 PM                     All of the shorthand terms, such as "4K" or levels of "megapixels" touted for digital cameras is all -to put it bluntly- laziness. Or just call it taking the path of least resistance. Something like "1920 by 1080" doesn't roll off the tongue as easily as a far less exact term like "1080P," which is now being twisted into meaning two different things.  |  IP: Logged Ron Curran Jedi Master Film Handler Posts: 504 From: Springwood NSW Australia Registered: Feb 2006 posted 05-31-2006 02:07 AM                        Thanks for the info, John. I have changed all the projector rollers over to SMPTE spec +/- .025mm and the image has improved by that much  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 05-31-2006 02:38 AM                        quote: Dave Macaulay Scanning and film recording take considerable time, so only a few minutes of film should need to be online at any time Unless you're carrying out digital restoration or other post-production work, in which case you might want random access to more footage. But as you say, HDD storage is now so cheap (and getting cheaper all the time), that if you can afford HD scanners and film recorders, you can easily afford several terabytes of HDD space. Agreed on the timescale, though; I recently had a tour of this lab, and their 6k Cineon scanner was chomping through a reel of 35mm camera negative at the rate of 25 seconds per frame or thereabouts. The owner told me that it took around 3 days or so to scan a typical 1,000 foot reel at maximum resolution.  |  IP: Logged

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