Originally Posted by gunner842
I was asking you about video settings not long ago, I tried Custom and noticed very slight jaggies in lettering vs source direct which smoothed things out. I currently use source direct because of this, but not watched enough 1080p content to decide if that is the only main difference.
I know you did some testing, and just wondered if you come to a conclusion on what you prefer out of source direct or custom so the player upscales 720p/1080p instead?
From looking at other posts you've made, I'm assuming you're talking about with an LG GX. I have an LG C9 which may be somewhat similar, but some to all of what I'm saying here may differ from the GX. No easy answer to this. You have to decide which you think produces the best results.
All the upscaling to 4k is happening in the UDP-203 using Auto or Custom UHD Auto. I do get the slight jaggies on 720/1080 lettering (and lines in test patterns that are between vertical and horizontal). However I've only noticed this on computer and video generated lettering. I'm not seeing it if the lettering is from a film source. Oppo appears to be using something other than simple nearest neighbor to perform the upscaling (bicubic perhaps?). I can tell this because when presenting a 1080p alternating pixel pattern, I'm not getting 2x2 pixel blocks of black alternating with 2x2 pixel blocks of white. Instead I get a bright white pixel, two gray pixels, a black pixel, two gray, bright white, etc. Theoretically at least, bicubic (or whatever the Oppo is doing) should be superior. The Oppo also seems to pass full bandwidth chroma when upscaling.
With Source Direct my C9 is doing the upscaling. With the C9's Sharpness set to 0, it's obvious that the C9 is performing simple nearest neighbor upscaling. That means each individual 1080 pixel becomes a square 2x2 block of 4k pixels, and each individual 720 pixel becomes a square 3x3 block of 4k pixels. (This is really the "truest" form of upscaling in my opinion.) This too will produce the slight jaggies on 720/1080 lettering. However, as the C9's Sharpness is increased to 10, anti-aliasing is introduced that hides the jaggies. High frequency chroma seems to be muted when the C9 is doing the upscaling (tested on an earlier C9 software than what's current).
For now I'm going with the Oppo doing the upscaling, and living with the occasional jaggy edge to get the full chroma bandwidth. I'm not really sure if that is better or worse than having the C9 do the scaling. I do like the anti-aliasing that the C9 does, but it comes with tradeoffs.
The Spears & Munsil HD Benchmark, 2nd Edition
is the best tool I know of for evaluating the differences. However some of the Mehanik HDR10 calibration and test patterns
were more useful for evaluating the anti-aliasing on the C9. I didn't mention 480 because it doesn't integer scale (not directly divisible by, not to mention not having square pixels) to 4k, so it gets a lot more complicated. I hope this helps.