Comment on [deleted]
slazer2au@lemmy.world 1 week ago
If the raw file is compressed to piss poor quality with an algorithm, the same algorithm could be used to faithfully live upscale the media file back while you are playing it.
Not really, compression takes an average over an area of video, you can’t really reconstruct the missing values by reversing the algorithm.
PiraHxCx@lemmy.dbzer0.com 1 week ago
webghost0101@sopuli.xyz 1 week ago
Once detail is removed it can never be restored faithfully.
If you somehow include the details as data all combined in a compressed format you save space but the result is not a lower res, but a lossless compressed native res in which case upscaling is irrelevant.
LastYearsIrritant@sopuli.xyz 1 week ago
No
Wrufieotnak@feddit.org 1 week ago
Let’s try to explain compression with a mathematical example:
You have the numbers 10, 35, 56 and 59. You form an average out of those values, which is 40. Now you give that average number to me. You tell me it’s made up of 4 numbers and ask me what those numbers were. I can form a guess, based on other examples you send me before and told me afterwards what numbers were in there. But I will at most randomly guess the right values by chance.
Compression is nothing different than this example except the mathematical numbers represent colors.