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Which connection is best?

Discussion in 'Plasma TVs Forum' started by doctorjuggles, May 13, 2005.

  1. doctorjuggles

    doctorjuggles
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    I have recently bought a new Yamaha RX-V1500 and was wondering something about the way upconversion works on it with regards to Sky.

    I'm wondering whether buying a good quality Scart -> S-Video cable and feeding that into the receiver for component upconversion will be an improvement/step backward in terms of picture quality when compared to the current set-up of the JSTech RGB to VGA converter.

    In a nutshell, will:
    Sky -> Scart to S-Video -> RX-V1500 upconvert -> component -> plasma

    be better than/worse than/equal to

    Sky -> scart -> JSTech RGB to VGA -> plasma?

    I know there's a forum for receivers, but I wasn't sure which this query fit with, and seeing as the great advice I got on buying a JSTech box came from in here, I figured someone would know this one too.

    Thanks! :smashin:
     
  2. FaxFan2002

    FaxFan2002
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    You could always convert to component before it hits the AMP, then all the AMP does is use video switching so..

    SKY -> RGB Scart to Component -> RX-V1500 -> Plasma

    JS Tech do a RGB Scart to Component convertor - this is assuming you have enough component connections available on your AMP? I do this and the PQ is very good (even tho I am using the cheaper CYP convertor).
     
  3. pragmatic

    pragmatic
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    Yea go for
    Sky (rgb) -> RGB To component converter -> 1500 -> display
     
  4. doctorjuggles

    doctorjuggles
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    Thanks guys.

    Hmm. I was afraid that might be the answer. If that's the case, isn't it best for me to just stick with the VGA converter that I already have? I'm not going to get any further benefit from the component option, surely?
     
  5. pragmatic

    pragmatic
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    There is not gonna be much difference, so use either.
     
  6. FaxFan2002

    FaxFan2002
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    shouldn't be much difference - maybe just easier to have everything going through the AMP.
     
  7. Dan L

    Dan L
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    I don't think any standard SKY boxes can output an s-video signal over SCART, so a SCART-s-video cable probably wouldn't work anyway.
     
  8. FaxFan2002

    FaxFan2002
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    Sky+ can send a svideo signal
     
  9. Gordon @ Convergent AV

    Gordon @ Convergent AV
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    The signal being broadcast by Sky is digital component.
    The signal the plasma needs to drive the panel is RGB.

    Sky box best output is RGBsync on composite from Scart. In this case the digital bcompressed broadcast signal has been decoded and converted from component to RGB in the Sky box.

    Ideally you want as few conversions from analogue to digital and component/svideo/rgb as possible to minimise possible induced errors.

    So the way you are running just now is probably the best. Sometimes, possibly due to varations n output levels of Sky boxes, there are issues with oversaturated colour with the VGA input from transcoders. Most devices do not have colour control for an RGB input signal. In those instances you are probably best using an RGB to Component convertor and going in to plasma on component.

    Downconverting to SVIDEO then up to component in the amp will result in loss of colour information and is best avoided.

    Gordon
     

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