This is topic DLP problems in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.
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Posted by Tom Kroening (Member # 201) on 10-02-2000, 06:00 PM:
I've kinda been thinking about DLP. I know an issue that we have right now is scratched and dirty prints. Now the way I understand it, movies will be digitized and then compressed. Does anyone know if this will be lossfull or lossless compression? If its lossfull compression then its still an imperfect medium, just like film. DLP could also be subject to frame rate drop due to data corruption (especially if read over and over from a cd like DTS). Im sure patrons wouldn't appreciate a jumpy movie!
Posted by Scott Norwood (Member # 30) on 10-02-2000, 06:20 PM:
It's definitely lossy compression.
The early DLP demos were run directly off of a D-5 videotape (HDTV-resolution, probably processed with extra edge-enhancement).
The Star Wars DLP shows were run off a 300 (?)-gig Pluto RAID array and were compressed at a fairly low ratio (no, I don't know what that was, but I didn't notice any compression artifacts).
The current DLP installations are using a Qubit hard-disk system and a standard feature-length movie takes up about 40gigs of space. This is pretty serious compression and the artifacts are very noticeable in some scenes and not at all noticeable in others. It's weird, though, since the picture "looks" sharp at first glance, but, after watching it for a while, it becomes obvious how much detail is really lacking.
I've posted this before, but in case anyone cares and has missed the earlier posts, I have some pictures and longish reviews here.
Posted by Greg Mueller (Member # 17) on 10-03-2000, 09:20 AM:
"pretty serious compression and the artifacts are very noticeable"
"it becomes obvious how much detail is really lacking."HA-HA 
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Greg Mueller
Amateur Astronomer, Machinist, Filmnut