How to force 4:2:0 chroma subsampling to allow 1080p / 120hz 3DTV Play?
Hello forum, I registered here to ask anyone if they knew of a way, official or otherwise, to force my videocard to enable a 1080p / 120hz custom resolution that uses YCbCr 4:2:0 so that you can get high frame rate 2D or 60hz per eye frame packing (3DTV Play) at 1080p My projector supports HDMI 1.4a bandwidth but even though I have a Maxwell GTX 970 with HDMI 2.0, I'd like to be able to force 120hz through within the HDMI input bandwidth limitations by exploiting chroma subsampling. NVidia, can you enable 4:2:0 as a user choice in the driver? Or is there a tweak app or registry setting or .inf file edit hack that I can use to add 1080p / 120hz at 4:2:0 YCbCr myself? Thanks! I tried looking for a 3D outboard HDMI processor that accepts 120hz input signals at 1080p using 300 mhz HDMI chips, but I'm at a loss to find one that will accept a single 120hz input at 4:4:4 and output a 120hz signal at 4:2:0
Hello forum, I registered here to ask anyone if they knew of a way, official or otherwise, to force my videocard to enable a 1080p / 120hz custom resolution that uses YCbCr 4:2:0 so that you can get high frame rate 2D or 60hz per eye frame packing (3DTV Play) at 1080p

My projector supports HDMI 1.4a bandwidth but even though I have a Maxwell GTX 970 with HDMI 2.0, I'd like to be able to force 120hz through within the HDMI input bandwidth limitations by exploiting chroma subsampling.

NVidia, can you enable 4:2:0 as a user choice in the driver? Or is there a tweak app or registry setting or .inf file edit hack that I can use to add 1080p / 120hz at 4:2:0 YCbCr myself?

Thanks! I tried looking for a 3D outboard HDMI processor that accepts 120hz input signals at 1080p using 300 mhz HDMI chips, but I'm at a loss to find one that will accept a single 120hz input at 4:4:4 and output a 120hz signal at 4:2:0

#1
Posted 01/22/2015 04:53 AM   
Even if it exists, you're look at $1000+ equipment.
Even if it exists, you're look at $1000+ equipment.

Inno3D RTX 2080 Ti iChill Black (330W Power Limit / +50 MHz Core / +750 MHz Memory)
Intel Core i9-9900X (4.6 GHz Core / 3.0 GHz Mesh)
Corsair Vengeance LPX 32 GB (4 x 8 GB) DDR4 CMK32GX4M4Z3200C16 (4000 MHz 18-20-20-40-1T)
MSI MEG X299 Creation
Asus ROG Swift PG27VQ / Dell S2417DG / 3D Vision 2 / Oculus Rift / Marantz SR6012 / LG OLED55B7T
Intel Optane 900P 280 GB / Tiered Storage Space (Samsung 950 PRO 512 GB / Seagate IronWolf Pro 10 TB)
Windows 10 Pro 64-bit

#2
Posted 03/19/2015 01:20 PM   
He's just looking for a driver hack. Before HDMI 2.0 became possible on Nvidia GPUs with the release of Maxwell/9XX Series, Nvidia pushed 3960x2140@60Hz using the available HDMI 1.4 bandwidth required for 3960x2140@30Hz. http://www.tomshardware.com/news/nvidia-kepler-4k-hdmi-1.4,27117.html More than likely he'd get an out of range error from the display, even if he could figure out a hack. I would think that 3DTV Play/3D Vision would not engage anyways using YCbCr 4:2:0
He's just looking for a driver hack.

Before HDMI 2.0 became possible on Nvidia GPUs with the release of Maxwell/9XX Series, Nvidia pushed 3960x2140@60Hz using the available HDMI 1.4 bandwidth required for 3960x2140@30Hz.

http://www.tomshardware.com/news/nvidia-kepler-4k-hdmi-1.4,27117.html

More than likely he'd get an out of range error from the display, even if he could figure out a hack. I would think that 3DTV Play/3D Vision would not engage anyways using YCbCr 4:2:0

#3
Posted 03/19/2015 05:56 PM   
Hey I was wondering did you find a way to force 4:2:0 chroma subsampling? Asking so I can use 4k 60fps gaming on a hdmi1.4 4k tv
Hey I was wondering did you find a way to force 4:2:0 chroma subsampling? Asking so I can use 4k 60fps gaming on a hdmi1.4 4k tv

#4
Posted 06/14/2015 04:48 PM   
You should be able to do 4K60 via 420 by switching into YCbCr in NVidia control panel. I managed to add an "HDMI 2.0" mode via CRU to my display but the projector can't handle it. 150Mhz pixel clock is a fundamental limitation of the Texas Instruments DMD controller so there is no way, even thru a hack. The new controller for UHD or Faux-K DLPs can do 300Mhz pixel clocks (they use two of them to achieve 600mhz required for 4K60), so it might be possible to input a 1080p120 input that way, on a 1080p DLP, by using the newer controller. I think the best chance of us getting a projector that can do 1080p60 frame sequential 3D (or 120hz in 2D), is one of the new Faux-K projectors with HDMI 2. Especially a 3-LCD type. 1080p120 is officially supported in HDMI 1.4 but you need 300Mhz chips which were basically non-existent until recently, for 4K. Entirely TI's fault. The only way to get 120hz prior to this was via 3-chip DLPs which use one controller per DMD, and they could theoretically go up to 1080p180 (3 x 60hz). We are more likely to get 1080p120 on an LCD projector, I believe.
You should be able to do 4K60 via 420 by switching into YCbCr in NVidia control panel.

I managed to add an "HDMI 2.0" mode via CRU to my display but the projector can't handle it.

150Mhz pixel clock is a fundamental limitation of the Texas Instruments DMD controller so there is no way, even thru a hack.

The new controller for UHD or Faux-K DLPs can do 300Mhz pixel clocks (they use two of them to achieve 600mhz required for 4K60), so it might be possible to input a 1080p120 input that way, on a 1080p DLP, by using the newer controller.

I think the best chance of us getting a projector that can do 1080p60 frame sequential 3D (or 120hz in 2D), is one of the new Faux-K projectors with HDMI 2. Especially a 3-LCD type.

1080p120 is officially supported in HDMI 1.4 but you need 300Mhz chips which were basically non-existent until recently, for 4K. Entirely TI's fault.

The only way to get 120hz prior to this was via 3-chip DLPs which use one controller per DMD, and they could theoretically go up to 1080p180 (3 x 60hz).

We are more likely to get 1080p120 on an LCD projector, I believe.

#5
Posted 07/02/2017 08:00 PM   
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