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RGB or Component - Which is better (noob alert)

Discussion in 'Cables & Switches' started by jimborae, Jun 9, 2005.

  1. jimborae

    jimborae
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    I've just got my first projector (Sharp xv-z91) & I will be installing soon from the ceiling & i'm unsure which would be the best way to hook it.

    I have an Arcam DV88 dvd & it has outputs for component, s-video & RGB, although RGB can be sent via scart or component cables. The project only has RGB via 15pin d-sub connector (like on a pc monitor cable).

    So which will give the best picture, all advice gratefully recieved.

    Cheers

    Jim
     
  2. CJROSS

    CJROSS
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    Component - RGB - S-Video

    Although depending on the kit, S-video can appear just as good as RGB.

    Component PAL PS on a large display with a good DVD-V player is pretty stunning.
     
  3. pjclark1

    pjclark1
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    incorrect, this is the correct order of quality
    progressive RGB - progressive Componant - RGB - Component - S video
     
  4. vex

    vex
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    So whats the difference between RGB and Component?

    Does RGB normally include the 2 sync cores as well?
     
  5. CJROSS

    CJROSS
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    PJ Im not familiar with Progressive RGB TBH, But I assume Non Progressive Component is just normal Interlaced then ? If so then Component from my SD-9500 via my TV is nigh on identical to the PAL PS Component output which is better than RGB (From my old Pioneer 717) or S-Video (SD-9500 is superior to the 717 RGB).

    As such it depends on the kit as I mentioned.

    So actually IME with the player & display I have your correct order of quality does not tally to mine :

    Progressive Componant - Component - S video (better than my old RGB from 717) – RGB

    ATB dude & Vive le difference.
     
  6. owain_thomas

    owain_thomas
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    on my CRT TV the thing that makes the biggest difference is whether the signal is interlaced or not, prog scan component is lovely, rock solid and great colours. Interlaced component is pretty much the same as interlaced RGB for me, very good but not as pleasant as prog scan as it seems a bit blurry and imprecise.

    Just to muddy the waters a little further ;)
     
  7. chedmaster

    chedmaster
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    some people are talking RGB with sync on composite (i.e. scart) and some people (i think) are talking RGB HV or RGB S (think thats right - sync on one or two extra cables)

    The rule Component > RGB > s video > Composite is when RGB is via scart, with sync on composite.
     
  8. Joe Fernand

    Joe Fernand
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    Hello Jim

    See what you've started :)

    A Component Video signal is one where the video signal is split down into its various constituent parts.

    RGB and YUV (often called Component) are different 'formulas' for making that split.

    RGB comes in various flavours - some aimed at the Video and some aimed at the PC Data market.

    In the Home Theatre market a lot of emphasis is placed on YUV 'Component' as that is the standard adopted in the US for Progressive Scan' Extended and Higher Definition TV's.

    In your set up you have a DVD player that can Output Interlaced RGB on SCART or Interlaced YUV on 3RCA sockets - there is an upgrade option for your player that enables Progressive YUV on the same 3RCA sockets.

    Your Projector has the ability to Input Interlaced or Progressive YUV on 3RCA sockets and this would be my first choice connectivity - as far as I can tell the HD15 (VGA) RGB Input is a PC input; though possibly with an adapter you can Input an RGB Video signal from a SCART equipped source.

    Its less costly to go with the YUV connection and most likely will produce a better result as you wont require any adapters plus your DVD player has an excellent YUV output.

    Best regards

    Joe
     
  9. vex

    vex
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    So can someone actually confirm the connections required for each signal format. :confused:

    I thought the following, but happy to learn.

    RF - 1 TV type socket, carrying modulated video and audio (happy with that one) :smashin:

    Composite - 3 Phono / RCA connections, 1 Video, 2 Audio Left and Right

    Component - I thought 3 Phono / RCA Connections and this was infact RGB?

    RGB - So if component isnt RGB then what is RGB?

    YUV - Now I am really getting conffuzzed :suicide:

    Chris
     
  10. owain_thomas

    owain_thomas
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    hi chris,

    you were right about component (YUV) being carried over 3 RCAs, it usually is. RGB (in AV terms at least) is almost always carried by SCART cables, very occasionally it is done over RCAs but this is pretty rare IME.

    YUV is what most people mean when they say "component".

    HTH
    owain
     
  11. vex

    vex
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    So what does YUV stand for and what are the signals carried?

    I know that RGB stands for Red, Blue, Green and relates to the three different colours used to make up a tv picture. I though this was what was carried over the composite connections. Then you sometimes get an additional X and/or Y sync cable to bring them all back into line.

    Thanks so far Owain.
     
  12. Joe Fernand

    Joe Fernand
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  13. Nick_UK

    Nick_UK
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    YUV (or Y, Pr, Pb which is exactly the same) are colour difference signals.

    Y is the Luminance (or brightness) signal of the picture
    U or Pr is the Luminance - (minus) the Red signal
    V or Pb is the Luminance - (minus) the Blue signal

    So, if you add U and V together and subtract them from Y, you get the green component.

    The big difference between RGB and YUV (Y, Pr, Pb) is that in YUV only the Y signal is full bandwidth, because the colour information carried in the other two cables is reduced bandwidth.
     
  14. Baron Von Doom

    Baron Von Doom
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    Do You Need A Proper Component Cable Or Will Any Three Phono To Three Phono Do?
     
  15. chedmaster

    chedmaster
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    any three phono lead will work but it will not be very good at all - at least spend £6 on www.tvcables.co.uk on a proper component.
     
  16. Baron Von Doom

    Baron Von Doom
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    Seen A Thor Three Phono For £25.
     
  17. chedmaster

    chedmaster
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    good...
     
  18. Baron Von Doom

    Baron Von Doom
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    So This Would Be Fine For Component?
     
  19. chedmaster

    chedmaster
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    why dont you get a thor component cable?
     
  20. chedmaster

    chedmaster
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  21. Baron Von Doom

    Baron Von Doom
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    Shop Near Me Doesnt Have Any Component Cables. Already Got Proper Component But Three Meters. Only Need About 1 Meter
     
  22. pharris007

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    HI.

    I was told that using normal phono leads even expensive one will not do. In fact they must be digital phono leads (is it rf lead?)- the same for using the 5.1 sound feed from the dvd to the amp.

    so was i being fumbled?? :(
     
  23. chedmaster

    chedmaster
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    I think they have different resistances, 50 ohm for audio (analogue) 75 ohm for video / digital coaxial. But three phonos will work, it just wont be a true 75ohm connection (which is rare even in ixos and thor etc).
     
  24. Joe Fernand

    Joe Fernand
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    Hello all

    I think The Beekeeper (see sticky thread at the top of the Cable Forum) proved a piece of wet string will pass a signal!

    If your wanting to send a 'Component' Video signal at least get a set of three 75 Ohm video cables - a more than decent 1m set will cost you around £35.00.

    The quality of the cable can have a detrimental affect on the signal - you might as well stick with a decent S-Video connection if your going to stick poor cables in your 'Component' sockets.

    Best regards

    Joe
     
  25. CJROSS

    CJROSS
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    I currently use a Thor BNC-RCA 3 Component cable, very nice it is too.
     

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