vertical banding

Discussion in 'Projectors, Screens & Video Processors' started by pioneerman, Mar 17, 2006.

  1. pioneerman

    pioneerman
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    might be a dumb question but do you get vertical banding on dlp?
     
  2. DaveHT

    DaveHT
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    No. VB is a LCD pj artifact (and some LCDs have it more than others). A good LCD pj has minimum VB, which will be invisible most of the time.

    Dave.
     
  3. pioneerman

    pioneerman
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    ok thanks dave.the reason i ask is that on sky and pal interlaced dvds i have vertical lines all the way across the screen,they are a few inches apart, i have tried various plug sockets and interchanged connections ie;s-video and component but still lines.is this normal on a 480p resoulution pj,that it prefers 570p. ntsc progressive is fine no lines :confused:
     
  4. pioneerman

    pioneerman
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    bumped if anyone can help
     
  5. pioneerman

    pioneerman
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    tonight i borrowed a freinds player which is pal progressive i switched between progressive and interlaced and on interlaced i still have the lines but not on pal progressive so it must be that my projectors built in deinterlacer is at fault so phone call to infocus in the morning.
     
  6. silasreid

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    is it really right that dlp does not get any vertical banding?

    i was watching fellowship of the ring last night on the sharp xv201e through progressive component and had the odd touch - not noticeable unless you're looking but definitely there.

    anybody else seen any vb on dlp progressive?
     
  7. chriskuta

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    I've heard that minor VB can be mistaken as noise from the AC power rail.

    A friend of mine works in AV setups for conferences etc and told me to make sure I run my PJ from a different AC outlet to my Audio equipment, he's seen interference on screens caused by tranny hum in high powered audio equipment.

    They normally run three phase power ( 240VACx3 here in AUST ) and use a single phase for Lighting, Video and Audio. Taking special care not to have low voltage data cables ( component ) anywhere near the AC lines.
     
  8. Peter Parker

    Peter Parker
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    I wouldn't have thought you'd get a 3 phase supply in a residential house as that can cause problems of having 415v within arms reach. Here in the UK we have each street on a seperate phase so the seperation should help prevent any hazardouse voltages being present.

    Gary
     
  9. chriskuta

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    You're right, we don't get 3 phase in residential areas either. I really meant that most of the sites my mate works on - large conference rooms - usually have 3 phase available.
     
  10. Peter Parker

    Peter Parker
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  11. spikerules

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    Well I'm sure my DLP PJ suffers from minor vertical banding... I have a PE7700 and on fast movements (i.e. games etc) I get, what looks to me, like v.banding issues?

    When it comes to LCD and DLP I'm pretty sure that the main artefacts the two differ from are LCD's screen door effect & DLP's rainbow effect (on single chip models). I may be wrong, but that wont be any surprise to people here;)
     

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