Originally Posted by traumadisaster
I've tested on Seiki 4k 50 inch and 4k 2014 models of:
I will google the brown test but I don't play that as a game. In games I don't notice anything.
1 - how does it matter for blu rays since they output in 4:2:0?
2 - could someone with better skills than me post a game pic side by side of 4:4:4 and 4:2:0 and draw an arrow to the difference?
Gaming: My experience is with the samsung 4K, not the sony.
On the samsung 4K, games played in 2D don't show degradation as much as there is color difference 420 vs 444. Since I don't game in 2D, I don't know if the colors can be fixed. But in 3D there is considerable degradation going from 444 chroma to 420 chroma. If one is Okay with seeing the world in 2D rather than natural realistic 3D, then I suppose 420 may be a viable alternative in games.
2. Blu Rays:
Perhaps your logic is that a 420 encoded blu ray will wind up being 420 regardless, but it doesn't work that way. 420 Chroma subsampling reduces the color resolution by 75%. So a 420 blu ray will be reduced to 1/4 color resolution on the disc, then get a second 75% reduction when the 420 HDTV reduces it when it sends it through a second 420 color reducer. If a 444 HDTV, then you don't get the second 75% reduction. If 420 HDTV, you get 1/4 of the color res of the 1/4 color res pixels on the disc. That's why the panasonic colors are so outstanding in 4K.
On a samsung, 2D blu rays look as good as any because they are upscaled to 4K/30Hz, so playback is in 444 chroma. But 3D blu rays are played back at 24Hz, so they get the second 75% reduction and are significantly ugly, you can see the degradation instantly. Luckily there's a fix, otherwise, I wouldn't even consider a samsung: The program is 'Stereoscopic Player' v2.14. There's an option for SBS mode which results in playback of 3D blu rays at 30Hz, so full 444 chroma playback. The image quality is outstanding! SOOOOO much better than any mainsteam player like the cyberlink which doesn't offer either SBS or top/bottom. It cost 39 euros (the vendor is in Austria) but worth 10 times that.