Re: HOWTO: Quick Frame Transport (QFT) - Large Vertical Totals (reduce lag, reduce crosstalk)
Posted: 30 Jan 2023, 02:24
Who you gonna call? The Blur Busters! For Everything Better Than 60Hz™
https://forums.blurbusters.com/
The divergence is usually because it's calculating based on the pixel clock, because your QFT 60Hz mode matches the monitor's 360Hz EDID's horizontal scanrate and pixel clock! While you will need tests to see if QFT lag reductions have been achieved, the divergence indirectly confirms your QFT is already functional.roro13200 wrote: ↑30 Jan 2023, 03:39thank you for your answers .
the problem is that the game i play rtss does not work.
is there a way to know if our qft mode is functional?
when I activate a qft mode for a 60hz mode from 360hz (aw 2521h).
the indicator on the panel tells me 60hz, but in the osd it tells me 360hz.
There is a difference between these two questions:
Would it be possible to build a device to convert the HDMI signal of a 60fps console to a 60fps QFT (240fps output speed)?Chief Blur Buster wrote: ↑26 Oct 2022, 20:01Unfortunately, this won't help because QFT is not supported in original retro consoles.FlameOnion wrote: ↑25 Oct 2022, 08:06Does increasing Vertical Total helps to reduce lag when converting from cvbs(retro console,nes) to hdmi or vga?
QFT needs to be done by a supported chip (e.g. NVIDIA, AMD)
It works on some CRTs but it has some severe side effects like very flat image size.
Large VBIs often create weird effects with CRT beam steering.
However, it would only work with a GPU (AMD/NVIDIA) capable of VGA output, or if you used a low-lag converter like a HDFury that converts digital output to analog.
This won't work because retro consoles don't have QFT support built into them.FlameOnion wrote: ↑25 Oct 2022, 08:06Increasing vertical Total works with this: scart(rgb) to vga (https://www.geocities.ws/podernixie/htp ... l#scartvga)
This cable lets you connect a DVD player, DTV receiver or any other device with RGB scart output to an Arcade or PC monitor.(nes composite>DVR scart rgb> vga xl2411 or crt)
You have to use an emulator from a PC to use QFT, and use QFT via the NVIDIA/AMD GPU, because the GPU generates the QFT.
Yes, in theory (would have lag), so would serve only as crosstalk reduction.sonicgenfan wrote: ↑18 Feb 2023, 20:36Would it be possible to build a device to convert the HDMI signal of a 60fps console to a 60fps QFT (240fps output speed)?
my strobed vg279qm does this on the scaler with a pretty big latency penalty, I can tell because of the lack of crosstalk with nativescan 60hz inputs. just to be clear for sonicgenfan the vg79qm does not single strobe 60hz without hardware modifications.Chief Blur Buster wrote: ↑19 Feb 2023, 06:11Yes, in theory (would have lag), so would serve only as crosstalk reduction.sonicgenfan wrote: ↑18 Feb 2023, 20:36Would it be possible to build a device to convert the HDMI signal of a 60fps console to a 60fps QFT (240fps output speed)?
Past scanning backlights were mediocre because of internal backlight diffusion (under 100:1 contrast ratio) creating more strobe crosstalk than global-flash. You need roughly a 500:1 contrast ratio between nearby segments to prevent even LCD black from looking like LCD gray (and showing any remnant LCD GtG's).elexor wrote: ↑22 Feb 2023, 12:54my strobed vg279qm does this on the scaler with a pretty big latency penalty, I can tell because of the lack of crosstalk with nativescan 60hz inputs. just to be clear for sonicgenfan the vg79qm does not single strobe 60hz without hardware modifications.
chief do you know when they are going to start utilizing fald in a scanning backlight fashion i'd imagine a fast monitor like the xg2431 equipped with even a modest zone count fald backlight would be able to hide the 60hz nativescan crosstalk band fully, since the xg is already doing pretty well with a global flash backlight.
You make some good points about the viability of using scanning backlights for blur reduction with current FALD tech, thanks. will be waiting for some flexible bfi oleds.