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"I can't tell much difference between putatively 4K content and clearly-1080P" I presume the TV does upscaling? Not an expert, but theoretically a kick-ass alg
by fsloth 10y ago
"I can't tell much difference between putatively 4K content and clearly-1080P"
I presume the TV does upscaling? Not an expert, but theoretically a kick-ass algorithm should be able to gleam more resolution out of a temporally changing signal than the native resolution - thus actually providing more than 1080 pixels worth of resolution out of the 1080p stream.
When I bought a HD TV either the Blu-Ray player or my TV (can't recall anymore) upscaled my old DVD:s with surpising quality - I can only presume the same applies for the current generation (haven't had the chance to do detailed analysis).
Experts please revise.
- jamiek88 10y agoHow can an algorithm create more resolution (i.e. information) from less information? Do you mean a wavering 4k sream outputted as 1080p?
- LeoPanthera 10y agoIt's using information from adjacent frames to add extra detail.
- Pharaoh2 10y agohttps://scholar.google.com/scholar?q=neural+network+video+upscaling https://scholar.google.com/scholar?q=neural+network+video+up...
- nitrogen 10y agoThe general term is "video super-resolution". There's software available off the shelf to do it, IIRC.
- kimburgess 10y agoVideo Upscaling via Spatio-Temporal Self-Similarity: http://vision.ucla.edu/papers/ayvaciJLCS12.pdf http://vision.ucla.edu/papers/ayvaciJLCS12.pdf The Freedman and Fattal paper they mention can be found here: https://pdfs.semanticscholar.org/7df0/39049948d54fd1f4d75526743f315cf4865f.pdf https://pdfs.semanticscholar.org/7df0/39049948d54fd1f4d75526...
- webmaven 10y agoWe all laughed at the ridiculous "Zoom and Enhance" bits on TV crime shows, but it's become much more plausible in the past couple of years. It's called super-resolution, or upsampling. Here is a good overview of techniques: http://www.robots.ox.ac.uk/~vgg/publications/papers/pickup08.pdf http://www.robots.ox.ac.uk/~vgg/publications/papers/pickup08... More recently, Google's RAISER: https://research.googleblog.com/2016/11/enhance-raisr-sharp-images-with-machine.html https://research.googleblog.com/2016/11/enhance-raisr-sharp-... This repo pulls together techniques from several papers with impressive results: https://github.com/alexjc/neural-enhance https://github.com/alexjc/neural-enhance Anyway, it's an area of active research, there are already four dozen relevant papers in 2017 alone: https://scholar.google.com/scholar?q="machine+learning"+"super+resolution"&as_ylo=2017 https://scholar.google.com/scholar?q="machine+learning"+"sup...