Improving Video/Picture Quality

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Forums › Home Theatre (including HTPC and EPG Collector) › Improving Video/Picture Quality

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richms

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#1004957 13-Mar-2014 14:08

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4:2:2 makes UI and games look worse particually fine text. and is only good if you have exact 1:1 pixel mapping between the mpeg decoder and the output which most graphics cards do their best to prevent. ive not seen artifacts that were not also present when using RGB output as well and we're only masked a bit more in 4:2:2 mode because of the blurry as he'll colour. I have only played with mid range Samsungs however.

Ideally if hdmi wasn't such a POS interconnect it would be able to switch on the fly without a blanking of the display.

Richard rich.ms

Masterpiece

247 posts

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#1005204 13-Mar-2014 20:54

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This is the fundamental problem, setting your PC and display correctly for video will make games look crushed. Setting for games will make video washed out.

The trouble is software and hardware and OS all try to guess what you want, sometimes it works, sometimes it doesn't. It isn't HDMI's fault, that is just a transport, limited as it may be.

The key thing to remember, video is 16~235 Rec709, pc is 0~255 sRGB
Get this set right first.

The primary colours are actually the same between Rec709 and sRGB, but the ranges are not, incorrectly set and you will cause banding, crushing and other issues. 1:1 pixel mapping is another issue, which again PC's try to auto set things up and get it wrong all the time.

PC monitors are designed for sRGB, TV's quite often have 1 HDMI port that is a PC input, typically you find a red and white sound RCA's beside the PC input, my cheapo Samsung TV has this on HDMI 2 for example. This one might handle sRGB better, or RGB 4:4:4, this is what your games are, but you only degraded down to 4:2:2 then back to RGB display.
As I noted previously, video is 4:2:0, has been for ages. TV's generally do a better job of 4:2:2 or 4:2:0 than 4:4:4 from video sources. The odd display can handle 4:4:4, but it is rear.

Devices like PS3's PS4 are designed quite well, they have their issues, but are better than PC's with regards outputting video verse game levels.

Personally, I'd avoid trying to do games on a PC based media centre, that way you can set it and hopefully forget it, until you update a driver and have to reset everything.

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