Originally Posted by joka.
I'm looking to get an Onkyo or Integra A/V receiver and I noticed they have "4k upscaling" [3840 x 2160 or 4096 x 2160] which is something other receiver companies do not have [yet?]. They have the Marvell Kyoto G2H chip. I've been reading around and I'm trying to clarify some of the things I've read. Although the chip is able "guess" the missing information to upscale the resolution to 4k, does it make a difference if your tv's max resolution is 1080? Would this technology be used mostly for projectors or can it be used for tv's too?
It would be great if the chip could really guess what used to be in the image. Alas, it can't do that. If I took a picture and tore it in half, can you guess what the other half held? While there are techniques to generate "super resolution" images out of a series of stills, they can generate a ton of artifacts and at any rate, are not remotely economical to build into consumer electronic devices.
All these chips do is take the *same* image and represent it with more pixels. The image will not have any more detail. It will have, in the best case scenario, all the pixels you put in them. In the less than best case scenario, they actually add some artifacts of their own!
The only application of 4K is to reduce the pixel size of the display. If you have a 4K display, and 1080p (slightly less than 2K) then you have no choice but to manufacture new pixels to feed them. The manufactured pixels have been interpolated meaning they would represent the larger pixel of the source faithfully. If with your current display you don't see the pixels, then that reason goes out the window for needing or having 4K.
In your case, the scenario does not work at all. A current display will not accept a 4K feed. And even if it did, it would have to chop it back down to 1080p anyway since that is all the pixels it has. If you actually did the double conversion of 1080p to 4K in the AVR and 4K back to 1080p, all you would have is some degradation of video due to artifacts of each scaling and nothing more.
BTW, here is the spec sheet for the Marvel part: http://www.marvell.com/digital-entertainment/assets/qdeo_extended_technology_brief.pdf
. Not how there is nothing in their marketing material there about guessing anything, or inventing new pixels. What is there is perceptual techniques for making it look like there is more resolution than there really is. Those techniques can be applied just the same to 1080p images (just turn up the sharpness on your TV as an example).