Upscaling V's True HD ?

Discussion in 'General TV Discussions Forum' started by samhain, Oct 25, 2005.

  1. samhain

    samhain
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    Just wondered to all those that upscale to various resolutions above 576i, how does this upscaling compare to a true HD source ?
     
  2. phillfyspoon

    phillfyspoon
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    u cant polish a turd is one of the sayings. U cant reveil detail that isnt there in the first place so upscaled just isnt the same.
     
  3. oscarmadfish

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    u cant polish a turd :rotfl: :rotfl: :rotfl: :rotfl: :rotfl: :rotfl: :rotfl: :rotfl:
     
  4. Stephen Neal

    Stephen Neal
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    Upscaling can make SD sources look as good as they possibly can - it can also make them look dreadful. It won't make them look as good as good HD, but bad HD may look worse than good SD...

    In general upconverted SD will not look as good as decent HD, though it may look better than non-upconverted SD. Or it may not...
     
  5. Welwynnick

    Welwynnick
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    I think upscaled SD can look good if it is done well, but look at all those HD ready displays being fed SD broadcasts. That is obviously up-converted (by the display), but always looks terrible.

    If you watch DVDs on a good display using a good scaler or HTPC, then I think it can get close to 720p if there is not too much motion. 1080 resolution remains a big step ahead, however.

    Nick
     
  6. lordnoize

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    i thought 720p is better for motion...
     
  7. TheDoctor

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    For me, when I compare high-standard upconverted SD (which is excellent) versus high-standard HD, the difference is significant. High-standard HD is in a league of its own.
     
  8. Nick_UK

    Nick_UK
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    Even the most expensive scalers can't display picture information that was never sent. They can make "educated guesses" on the missing material, but it's never as good as the real thing. Scalers can make a real difference by converting to progressive scan, if the display can handle it.
     
  9. Stephen Neal

    Stephen Neal
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    720p native capture is better for motion if used in 50p or 60p.

    However 720p used to carry film sourced information is no different in motion terms to 1080i - both can happily carry 24p or 25p sources with no issues. 1080i does it with greater horizontal and vertical resolution. (Though not much greater vertically)
     
  10. Kalos Geros

    Kalos Geros
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    720 is "better" for (fast) motion simply because it basically has less data to be compressed than 1080 so it is potentially less prone to macroblocking on fast motion, nothing else (doesn't have anything to so with 50 or 60Hz which is actually the standard, not 25 or 30Hz/fps)...
     
  11. Jeff

    Jeff
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    Done well, upscaled always looks better standard SD and I'll take good upscaled SD over bad HD any day of the week. Artefact free comes before higher resolution IMO, so no compression, deinterlacing or motion artefacts.
     
  12. StevenBagley

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    Actually that's not true -- even in uncompressed HD 720p50 will handle motion better than 1080i25. This is because the resolution drops to 540p in 1080i footage during fast motion because of the amount each object moves between each field is so large that the eye can't integrate the resolution from the two fields.

    Steven
     

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