1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

screen colours & ntsc judder

Discussion in 'Projectors, Screens & Video Processors' started by micks_address, Nov 8, 2002.

  1. micks_address

    micks_address
    Well-known Member

    Joined:
    Nov 29, 2001
    Messages:
    4,322
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    83
    Location:
    Dublin
    Ratings:
    +171
    Hi folks,

    As we're still between homes and renting for a month i've had to improvise when using my pj - (sony hs1) i just have a few questions. Last night we watched Notting Hill Region 3 NTSC and on panning scenes there was a slight judder in the picture noticable. Is this due to the pull down used in NTSC material? If so is there anyway to eliminate it? Would a progressive scan player help?

    The other point is that we were projecting onto a wall which was pained terracotta in colour and the picture was surprisngly good. When we get into our new house - hopefully by the end of November i will have a dedicated room for the pj and initially anyway i was planning on projecting onto one of the walls. I should be able to paint the wall what ever colour i like so my question is what is the best colour to use to get the best results?

    Thanks,
    Mick
     
  2. Mr.D

    Mr.D
    Well-known Member

    Joined:
    Jul 14, 2000
    Messages:
    11,040
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    133
    Ratings:
    +1,111
    Yes its probably 3:2 pulldown judder. The only wayy to get rid of this is to use a refresh thats a multiple of 24 and hopefully get an HTPC or suitable deinterlacer to inverse telecine out the 3:2 pulldown. This isn't really an option in your case as the sony most likely has a native refresh rate of 60Hz on the panel itself regradless and feeding it anything other than this will involve the use of the units onboard/deinterlacer and scaler ... normally not ideal.

    You might have gotten lucky with the terracota colour balancing with a likely greenish cat from the sonys bulb. It will be a bit hit or miss without proper colorimetry equipment and knowledge ( similar to the FLD filter use). If you like it go for it but bear in mind you'll likely be taking a hit on the peak brighness and may be losing osme detail near black.)
     

Share This Page

Loading...