What is truly digital?

Discussion in 'Desktop & Laptop Computers Forum' started by RedRose, Jan 31, 2002.

  1. RedRose

    RedRose
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    I hear a lot about this Radeon card and wondered what the benefit was. If I connect the VGA output of my laptop (ATI Rage 8MB) to an LCD projector, I get a stunning picture. Now, I understand that this may be because there is little or no D-A/A-D conversion going on (SVHS, Component video etc.), but it's still an *analogue* RGB signal, right? Does the Radeon do something else, because I thought the only truly digital (ie frame buffer image gets a true one-to-one mapping to the projector's chip) connection is by using the new DVI standard.
    Am I talking b*****ks or can somebody enlighten me?
     
  2. Desmo

    Desmo
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    Without going into too much technical detail...becuase I haven't got a bloody clue what I'm talking about :) I'd say you were pretty much spot on.
     
  3. mjn

    mjn
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    only a DVI output on a VGA card is digital, all other forms of out put, s-video, RGB etc are all analogue.
     
  4. laurel

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    And all the flashy so called "Digital" monitors are actually analogue.

    The "digital" moniker is a marketing ploy used by the manufacturers and usually refers to the on-screen menu's used for geometry, brightness, contrast etc adjustments. i.e. they have no rotary controls - it's all done "digitally" - yeah right.

    Cheers

    Laurel
     
  5. Jeff

    Jeff
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    The important thing is that all the video processing (decoding, deinterlacing and scaling) is done in the digital domain and not corrupted by A/D D/A conversion. The final step from the video card to the projector is analogue but it's a very high standard of analogue.
     
  6. MAW

    MAW
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    I've never seen a projector with digital in, though some lcd panels have it. Can anyone correct me? If so, digi. out on your graphics card is pretty much a waste of money.
     
  7. Jeff

    Jeff
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    Actually DVI inputs on projectors is becoming quite common, the new Plus projectors have it.
     
  8. MAW

    MAW
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    The ones I've seen have a usb port, surely not enough bandwdth for dvd video, except mega expensive ones. iee1394 might be better, wonder if that's technically feasible (or desirable). Out of my depth here, excuse my ignorance. I thought about dvi when buying my projector, but as I say, the response to my queries in my price range struck me as 'not strictly true'
     
  9. zoolap

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