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Scalers and plasma

Discussion in 'Plasma TVs' started by Tee Tee, Oct 23, 2003.

  1. Tee Tee

    Tee Tee
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    Hi all,

    I have Panny 6 and am chuffed to bits with it. There is, however, one thing that niggles me and that is posterisation/banding. I didn't notice it so much at first but now seem to see it everywhere even whem I'm not looking for it. The display is connected via scart to a Pace Telewest box and via component to the DVD player.

    The posterisation is most obvious with the Telewest feed and hardly noticeable from DVD. Maybe I don't have the plasma set up quite right (Cinema mode with contrast and input level turned down a bit) or maybe this is a problem inherent to this model, but I didn't notice it nearly as much on a friend's 5 series.

    My question, after this rather lengthy preamble, is would a scaler make any significant difference to the problem and if so which should I be considering?

    Thanks for reading this far and thanks in anticipation for any advice.
     
  2. Tee Tee

    Tee Tee
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    Anyone?

    Thanks
     
  3. NeilMcRae

    NeilMcRae
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    check that you haven't got low power mode and that the telewest box and dvd player are outputting RGB. Scaler will deliver a better image from a cable box for sure.

    Neil.
     
  4. blindlemon

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    AFAIK the new Panasonic plasmas use the "Acuity" system also found in the PD30 range of CRTs. which, when fed an RGB input, also exhibit colour banding/posterisation.

    It's much less noticeable with a component, s-video, or even (ugh!) composite feed. So you might want to try switching your Pace box to output composite for a while to see if this improves the problem, and if it does, invest in a good RGB->Component or RGB->S-Video converter for the longer term.
     
  5. Tee Tee

    Tee Tee
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    Thanks Neil,

    Checked low power mode and that's set to off. DVD and cable box are both set to RGB.

    I've seen a number of scalers mentioned on this forum, usually the Iscan Ultra. I've also seen the Zinwell Briteview on offer in the Power Buys section. Anybody any experience of these?

    Thanks all.

    Edit: Just seen your reply blindlemon - will try your composite suggestion on the Pace box. I'll post back with findings.

    Many thanks.
     
  6. AVWotcha

    AVWotcha
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    posterisation = what exactly ? a term for colour banding ?

    Could be compression on the Cable feed. I've noticed banding on heavily compressed material even on my 22" CRT.
     
  7. Tee Tee

    Tee Tee
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    AVWotcha

    Posterisation (I think) is the effect you get where there should be smooth colour change from (say) light to dark but in fact appears as a distinct series of colours - a bit like having a computer monitor with low colour resolution. It's particularly noticeable in large areas of colour such as sky or water.

    Somebody feel free to correct me!
     
  8. Jasonjo

    Jasonjo
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    Do you mean solarisation???

    ...whereby you get banded rings that appear around a light source which instead of being a smooth gradutation are banded/stepped?

    Maybe we need an AV forums glossary??? :D :D

    JJ
     
  9. Tee Tee

    Tee Tee
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    Oops! Thanks Jasonjo.

    Yep, definitely solarisation!

    Sorry for the confusion everyone!
     
  10. Tee Tee

    Tee Tee
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    Tried switching the cable box to composite but seemed to make little, if any difference. Thanks for the suggestion though, worth a try.

    Any scaler users out there got any advice?
     
  11. NeilMcRae

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    I'[ve got a brightview and it makes some difference, but to be honest I've not really noticed this effect on either my 5 or 6 panny.

    Neil.
     
  12. lmccauley

    lmccauley
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    I also notice this with my Panny 6, even with my DVD player. It's especially noticable at the start of Disney films when the Disney castle logo appears.

    Connections:
    Sky+ -> RGB SCART -> Pioneer 545 DVD -> RGB SCART -> RGB2VGA converter -> VGA cable -> VGA input of Panny 6

    Cheers,
    Liam
     
  13. Gordon @ Convergent AV

    Gordon @ Convergent AV
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    Let me know a specific bit of a film where this is obvious and I ma use it at Event2 in the plasma with/without cal and scaler demo.

    Also does anyone out there own a D6 with scart terminal board and also owns AVIA and a RGB scart outputting DVD player? If so please email me as I would like ocnfirmation on something I have come across.

    Gordon
     
  14. Tee Tee

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    Liam,

    Yes I see it on Disney intros as well (ahem - I don't watch them you understand, they're for my young son!), but the effect is far less pronounced with DVD than it is via cable.

    I have a Tosh 510 DVD player connected via component to the VGA input of the Panny 6 with cable TV and Panny HS2 recorder (both outputting RGB) connected via scart to a scart board on the plasma.

    If anyone's willing to lend me an Avia test disc I'll carry out Gordon's test! (My Panny is a D6).

    Cheers
     
  15. lmccauley

    lmccauley
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    Toy Story 2 - R1

    When you select Play Movie from the main menu, the castle appears and then 7 seconds in there's a bright light in the centre of the screen that turns into the words "Walt Disney". I can see solarisation clearly on on the bright light, even though it probably only lasts half a second.

    I'll see if I notice it elsewhere.

    Cheers,
    Liam
     
  16. Paden

    Paden
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    Finding Nemo throughs up a couple of nice effects on my PW6.
    In the scene where they travel down into the abyss after the diving mask & light blue goes to dark blue, I get some nice solarisation :smashin: :(
    Also around the Lantern fish's lantern.
    I also noticed on the same film that when Marlin (a bright orange fish) is against some blue backgrounds he has a lighter blue halo.

    Cheers, Paul
     
  17. Gordon @ Convergent AV

    Gordon @ Convergent AV
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  18. TheBigApple

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    I'd be interested to know if solarisation affects only certain models of plasma. Or does the brightness and contrast settings make a difference?

    The only reason I ask is because I've watched the described scenes on my Pioneer 433HDE and there is no solarisation.
     
  19. Gordon @ Convergent AV

    Gordon @ Convergent AV
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  20. TheBigApple

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    By devices do you mean DVD, Sky etc. If so would it also depend on the make and model?

    Ta
     
  21. Gordon @ Convergent AV

    Gordon @ Convergent AV
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