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Originally Posted by ricodemus I don't really understand your second statement though. If most displays already upscale, why does anyone buy uspcaling dvd players? why does this forum exist? Bottom line is SD DVDs look like crap on my TV. In other words, they look like SD cable programming. |
There is no "magic" that can wrest more definition from a standard definition source. The best any upscaling process can do is guess at what's been stripped out by the low resolution recording process and try to put it back.
There's no "if" about it; if a pixel based display did not upscale an incoming 720x576 signal (say; that's PAL standard definition) then the on-screen image would occupy 720x576 pixels. On a 1920x1080 screen it would probably be in the middle of the screen - less than half the width, and about half the height - with a big black border around all four sides. Making it fit the whole screen
IS upscaling.
Why do people buy upscaling players? Good question and there are many possible answers, such as (guesswork):
- simple ignorance and/or salesman's spiel and/or misleading advertising
- player has a better scaler onboard than the one in the TV (possible but by no means a promise, and unlikely to be vastly different)
- upscaling players come with HDMI. Previously they've perhaps been inadvertently using composite video; they switch to HDMI and see a huge improvement - and they believe upscaling in the player is responsible
- differing settings in the TV for different sources...
etc.
Now, a standalone upscaler of semi-professional quality (costing, say, as much as a fairly large flat panel TV) may well give a visible improvement. These things have enough processing power to analyse, not just the one frame, but a succession of frames to try and work out the true shape of anything moving, and use that to help the guesswork.
Scaling is an inherently degrading process, in fact (although subjectively this may not be apparent) and is therefore best done only once. Scaling in the source, and ensuring that no further scaling is done can be tricky:
- the source needs to scale to exactly the resolution of the pixels in the screen
- the screen needs to be "willing" to accept this and not rescale it - known as 1:1 pixel mapping, and something of a
dark art on many screens.
...whereas scaling in the screen (only) is, by definition, done only once.
So
ALL OTHER THINGS BEING EQUAL there is little to be gained by scaling in the source, and the potential for loss.