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RGB scart Vs componant video

Discussion in 'TVs' started by chopper dave, Jan 19, 2004.

  1. chopper dave

    chopper dave
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    Can anyone shed any light on which type of connection will provide the better image from my Pioneer 656A DVD to my LG re44sz21rd. I ask as i fear that the lg has no RGB input but does have componant video input. The 'man down the pub' says that RGB is better.

    Can anyone shed any light on this?

    Thanks

    Chopper Dave
     
  2. pward

    pward
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    Hi,

    Using a component connection should provide a better image than using RGB.

    Perhaps your man in the pub was confusing 'component' connections with 'composite' connections...RGB will provide a significantly better image than composite. So, in order of quality (highest first):

    1. Component
    2. RGB
    3. Composite

    Paul
     
  3. jigglynuts

    jigglynuts
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    Shouldn't s-video be 3rd?
    Surely that's better than composite?
     
  4. eviljohn2

    eviljohn2
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    Both RGB and component should be roughly equal, unless you can use progressive scan which will make a significant improvement and can only be used with component.

    The picture information on a DVD is stored in component form, so if you use component then the TV must convert to:

    RGB which is a direct feed to the red, green and blue sections of the television.

    It follows that projectors/flat displays don't have an RGB section (as they form the image in a different way unless using a CRT projector) so should ideally use component. These displays don't usually incorporate RGB for this reason (although you may get RGBHV which is yet another format!).

    Essentially, using RGB or component in their standard form (ie. not prog scan) will produce very similar results.
     
  5. eviljohn2

    eviljohn2
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    The qualities go something like:

    1 - DVI
    2 - RGBHV
    3 - Component
    4 - RGB
    5 - S-Video
    6 - Composite
    7 - RF
     
  6. pward

    pward
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    Yes, s-video is better than composite, but I didn't mention is because the original question didn't mention s-video. My list was not intended to be exhaustive...

    Cheers,

    Pau
     
  7. chopper dave

    chopper dave
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    Thanks all

    Chopper Dave
     
  8. cerebros

    cerebros
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    1 - HDMI
    2 - DVI
    3 - RGBHV
    4 - Component
    5 - RGB
    6 - S-Video
    7 - Composite
    8 - RF

    any more?
     
  9. malaga

    malaga
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    for a tv is better the image in component (no progressive) or rgb ??????

    i have a loewe articos and a qed 29 in the scart3 with component.

    exist any diference in a tv???
     
  10. bonzobanana

    bonzobanana
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    Why is RGBHV rated higher than RGB? Surely the RGB signal is the same its only the fact that one has seperate syncs compared to the other having combined syncs. I realise RGB as in Scart RGB may have a lesser cable compared to RGBHV using bayonent connectors etc but in real world use would it really make a difference? Personally I see Scart RGB superior (slightly) to interlace component as long as the equipment aren't mismatched.

    My AE100 projector clearly gives a better picture via VGA (RGB) than component. If nothing else the colours are more dynamic and cleaner.
     
  11. MartinImber

    MartinImber
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    Theoretically DVB RF would be around RGB in quality
     
  12. Nic Rhodes

    Nic Rhodes
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    Why a difference between HDMI and DVI?

    Re the list which I agree with on principle, practical electronic considerations often change a few of these positions though chipsets are now getting much better at this. RGB and component can easily swap around according to how the electronics is done. Sililarly svideo has been know to beat RGB due to the 'down sampling' of some display devices. It is all down to how you do it. The AE100 is a classic example, by forcing 480wide the rgb input bypasses some cheap and nasty internal electronics and gives a better picture!
     
  13. eviljohn2

    eviljohn2
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    I suppose we need to decide if we're considering encoded digital signals, or decoded analogue signals (for example, DVB RF into a digibox, but still using RGB from box to display).

    This is because VGA is RGBHV rather than "plain" RGsB used via scart.

    As The Beekeeper (one of the resident physicists) points out, any processing carried out at either end can have a more significant effect on the signal than the cable itself.

    Personally, I've always maintained that the actual cable quality is negligible if they've been poorly terminated (impedence matched, well soldered etc)
     
  14. MartinImber

    MartinImber
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    Pretend that a DVD player could output the MPEG stream as DVB-T RF to an IDTV - should be little difference between RGB and that.

    However COFDM encoders cost ALOT!!!!
     
  15. eviljohn2

    eviljohn2
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    I see. I can't see it happening though with the high expense and questionable difference!
     
  16. Nic Rhodes

    Nic Rhodes
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    I'm a resident engineer, physicists.... yuk ;)
     
  17. eviljohn2

    eviljohn2
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  18. cerebros

    cerebros
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    Actually more a personal preference - as HDMI will also take your audio signals as well (up to the full 5.1/6.1 + SACD & DVD-Audio eventually), it gets my vote on the less cables required ticket. Picture quality wise, I don't know if there would be much, if anything, different between the two (barring cock-ups in the implementation)
     

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