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17th March 2019, 22:40 | #55383 | Link | |
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I tried the test pattern and I do see what you mentioned about the banding in PC mode on the C6. I goes away disabling PC mode and switching to the YCbCr444 color space in the control panel. To my eyes, the banding is slight and with some madVR setting tweaks, it can be pretty much eliminated in videos but at the cost of more processing power. I can deal with it but hopefully TV manufactures can sort out PC mode better in the near future. |
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17th March 2019, 23:22 | #55384 | Link |
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Do you guys think, it might be that the Banding is actually gone in other modes, because the LG's internal processor is applying its own debanding? So with PC mode, it's actually doing the raw input without internal deband, and thereby exhibiting the natural output ? It doesn't seem right that the banding comes back so consistently on multiple products, unless something internal has been set intentionally.
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18th March 2019, 01:25 | #55385 | Link | |
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All the other modes have some or all of the enhancements available. I enjoy the over all picture quality of C6 in conjunction with madVR in PC mode. Best thing to do is just experiment with the other modes and choose what looks best for YOU. |
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18th March 2019, 12:41 | #55387 | Link |
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Having a play with one of the latest test builds of HDR->SDR now I have a graphics card that can handle it. I think it looks really nice, but unsure if this is because my SDR is calibrated more for blacks and whites (using test patterns and nothing fancy) and going from HDR to an HDR -> SDR comparison is hard to compare as I cannot really calibrate the HDR side, so the SDR looks brighter and punchier for an initial comparison.
Any expert or more experienced person done a more in depth analysis with an LED TV and have any thoughts ?
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18th March 2019, 13:22 | #55388 | Link |
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So I just measured a 50 point saturation sweep using 20% pattern stimulus on my LG C8 in PC HDMI input mode (4:4:4 chroma) vs standard HDMI input mode.
All picture enhancement settings were disabled. GPU was set to RGB Full 8-bit. That pretty much confirms the banding I'm seeing when using pc-mode. I didn't even bother to check other colors. Last edited by j82k; 18th March 2019 at 13:30. |
18th March 2019, 14:07 | #55389 | Link | |
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If you want to check if the LG is running a debanding algorithm on its inputs when not in PC mode, you can disable dithering in madVR and then compare PC and standard mode again.
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18th March 2019, 14:41 | #55390 | Link | |
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Though I've successfully created a 48Hz custom refresh rate (using 50Hz as a base) as a workaround and that way you can get proper cadence for movie content even in pc-mode. Last edited by j82k; 18th March 2019 at 14:44. |
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18th March 2019, 15:55 | #55391 | Link | |
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2.40 (madVR) -> 2.20 (display) Because the image is actually getting brighter at the display, I increased the real display peak nits / lower limit in madVR to 225 nits to prevent the image from appearing washed out. Set like above, the difference in brightness between HDR and SDR is actually reasonably close when the dynamic target nits in the test builds is making the decision on the end display brightness as the movie plays. UHD Blu-ray actually looks better than SDR Blu-ray in most cases, with some exceptions where SDR Blu-ray is noticeably brighter. For a fair comparison, use full-bitrate UHD rips and not any of the UHD torrents out there that suffer from visual loss of quality.
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18th March 2019, 17:19 | #55392 | Link | |
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SO they make the panel, they probably have to do a sweep / precalibration of some sort My point is maybe that table gets disabled in PC mode to trade for response time or something. So you're getting a more raw version of what the panel should look like . This may actually be a better mode to calibrate under, because then correction is not happening twice, once by chip, once by gpu. How do calibrated luts look on this mode ? still banding ?
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18th March 2019, 17:43 | #55393 | Link |
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What I assume could be happening is that the TVs internal lut works at less precision in pc-mode. If it is input lag related then the game preset which has the same input lag as pc-mode should also suffer from increased banding. Gonna check that out later.
I did create a 3dlut calibration in pc-mode once but it didn't turn out good, which isn't surprising. To correct all of these banding errors (they are everywhere in the low end range) would require an insane amount of corrections. |
19th March 2019, 10:31 | #55396 | Link | |
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19th March 2019, 10:53 | #55397 | Link | |
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If you looking for an accurate picture mode for madvr and movies, try isf Expert mode first, this made for it. Game mode is alternative for people who want chroma 4:4:4. edit: Your input always should be set to PC, otherwise you trash Windows and apps quality. In this mode TV internally has fps-based source detection with different picture settings, so no reasons to switch input, if you dont watch tons of high framerate movies, of course. Last edited by thighhighs; 19th March 2019 at 12:02. |
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19th March 2019, 12:01 | #55398 | Link |
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anyone have a screenshot of what the madVR OSD shows when madVR is in fullscreen exclusive mode?
I ask because mine just says full screen windowed. Also there isn't that delay when going fullscreen. Manually triggering it via shortcut doesn't seem to do anything either. |
19th March 2019, 12:25 | #55399 | Link |
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@thighhighs
Wow, there is so much wrong with what you just said and I'm not even gonna bother correcting your statements. It seems like you didn't even read (or understand) my previous posts.... edit: also the issues discussed were specific to watching movies via madVR on LG Oleds and not about windows usage. Last edited by j82k; 19th March 2019 at 12:40. |
19th March 2019, 12:57 | #55400 | Link | |||
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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