Re: Bit off topic ...


"Arfa Daily" <arfa.daily@xxxxxxxxxxxx> wrote in message
news:0CPci.92$RD3.43@xxxxxxxxxxxxxxxxxxxxxxx
I went to a cinema last night that I hadn't been to before, to see Ocean's
13. We sat about half way up the theatre, so not too close. Both of us
commented that the picture didn't look *quite* in focus, although that
didn't seem to quite cover it. When the picture stood still though, it was
pin sharp. During the advert session, they mentioned that some sporting
event or other, was going to be covered live via satellite, which got me
thinking that this must be an *electronic* cinema, using DLP projectors. It
then occured to me that what we were seeing as being 'out of focus' might
actually be motion blur, typical of digital display technology. With this
in mind, when I looked even closer, it seemed to me that the picture was
not evenly illuminated either - a bit like I see on this widescreen LCD
monitor that I'm using here. During the main presentation, a film-stock
'scratch' appeared at the left side of the screen. However, it went on for
a long time, and was absolutely dead straight, although it did jump back
and forth a bit, but very 'precisely'. Also, it's colour seemed to change
with the surrounding content, so if that was black, the 'scratch' would be
white, and so on, so I then got to thinking that this might be an error on
a line of mirrors on the DLP chip. As we left the cinema, I took a look up
at the booth window, as best I could, and there didn't seem to be any film
looping around the ceiling that I could see.

So, does anyone out there work on these DLP projectors - either commercial
or domestic ? *Was* it one of them that was showing this film ? Are these
DLP chips slow enough that you can see motion blur ? Was that 'scratch'
typical of a DLP chip problem ? ( it wasn't there at the beginning, and it
went away before the end )

Sorry it's a bit OT, but it seemed like an interesting subject, with a
potential repair-related angle, and we sometimes have some good
discussions on here about such things.

MPEG compression artifacts are very distracting when the scene is changing
rapidly. Don't know for sure if that is a factor in your post. Satellite
video seems very prone to this phenomenon.


.

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