HCFR automatic pattern generator - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 15 Old 04-12-2019, 02:06 PM - Thread Starter
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HCFR automatic pattern generator

Hi there,

I have been trying to calibrate myself my tvs a few a times now. I just realized that i have been doing it wrong because of settings on my computer.
The first time i tried to calibrate using mp4 patterns but my LG tvs have 20 point greyscales and took forever. So I started to use the automatic pattern generator of HCFR. When I finished the real person movies colors seemed odd. The cheeks of most persons on the movies seemed like glowing too much.
Then i realized about full and limited RGB and that was messing my brightness and contrast initial settings and everything was off.

I think that I have fixed it, but not quite sure. This is my last setup:

Laptop with Intel graphics card. I have turned on YCbcr mode on the tv which is connected through HDMI (so the ouput goes on limited). I am using MP4 AVS709's patterns for brightness and contrast with MPC-HC player (i changed the ouput to 16-235). My LG tv is set with black levels to Low.

This should be the correct setup for the calibration right?

The other question i have is that my TV has a Y output of 0.204 at 0% white. Should i use a BT.1886 or power law?
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post #2 of 15 Old 04-12-2019, 04:31 PM
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good you found the control of vid card output and resulting picture.

been a long while but i thought HCFR had a pattern window that can be put on the "extended" display?
and read that many new patterns have been built in?
so HCFR is the pattern generator,

as far as which pixel state should be used,
settop boxes are mainly ycbcr 444 16-235.
HD SDR at this point but have read HDR is on the drawing board.

.204 nits? so about .070 fttl?


pretty damn high.
maybe you had full range 0-255 cal on it and then fed 16-235?

brightness and backlight control just how bright black is.
does the tv show signs of ABL?

I would get familiar with built in pat generator of HCFR and then make sure vid card is set to 16-235
and tv is expecting 16-235.

and look at HCFR "output range."

once i am sure the signal and tv are right, work with brightness and back light.

Personally, i go for the lowest black and sacrifice the back light overall brightness.

as far as bt 1886? your call once you get a handle on the black level lowest reading.

Loving D65
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post #3 of 15 Old 04-14-2019, 09:59 PM
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Quote:
Originally Posted by CalWldLif View Post
I would get familiar with built in pat generator of HCFR and then make sure vid card is set to 16-235
and tv is expecting 16-235.

and look at HCFR "output range."
The preferred setting for the internal patterns is 0-255 for the graphics card and 16-235 for HCFR. The “opposite” combination will also work, but is less accurate. 16-235 for both will be wrong.
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post #4 of 15 Old 04-15-2019, 03:40 PM - Thread Starter
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Thanks for the feedback. I tried with card (0-255), madVR(0-235) and TV (0-235) and it still was wrong. I think my Intel card is bad or the dongle i use from USB-c is doing some kind of conversation.
I pulled a nVidia eGPU and it worked! I was able to get down my Y to 0.015

Now I managed to calibrate my gamma to a [email protected]

On GoT season 8 episode 1 that was aired yesterday it was everything ok, but I see some banding when they were on a crypt scene. I suppose it might be because the low end of my greyscale is not absolutely perfect? I am attaching my file if someone can give it a look.
Attached Files
File Type: zip Despues.zip (41.6 KB, 5 views)
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post #5 of 15 Old 04-15-2019, 04:15 PM
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Quote:
Originally Posted by Gonzalo Márquez View Post
Thanks for the feedback. I tried with card (0-255), madVR(0-235) and TV (0-235) and it still was wrong.
Some graphic cards still output 16-235 when connected to a TV, even if you set the range to 0-255. madVR comes with a utility that can force the graphics card to 0-255.
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post #6 of 15 Old 04-15-2019, 05:17 PM - Thread Starter
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Quote:
Originally Posted by Dominic Chan View Post
Some graphic cards still output 16-235 when connected to a TV, even if you set the range to 0-255. madVR comes with a utility that can force the graphics card to 0-255.
Do you remember the utility name or how to activate it? thank you.
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post #7 of 15 Old 04-15-2019, 05:42 PM
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Originally Posted by Gonzalo Márquez View Post
Do you remember the utility name or how to activate it? thank you.
I don’t remember the exact name, but it’s installed in the main madVR directory along with the other files. Should be easy to spot as there are only one or two executables in that folder.
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post #8 of 15 Old 05-01-2019, 08:51 AM - Thread Starter
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Hi, well after playing a little bit more I discovered that the problem was being generated by local dimming.
When the local dimming is ON my Y at 0% is 0.015 but if I turn it off goes up to 0.185

I have done the calibration with local dimming on medium setting and I feel I have good results with Gamma power law 2.2 with black compensation.
I have done also the calibration with local dimming off, but it doesn't seem right.

Any thoughts?
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post #9 of 15 Old 05-04-2019, 07:53 PM
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What is the point of the HDR checkbox in the HCFR pattern generator menu...I check it off, HCFR switches my TV to HDR10 mode, the internal patterns show, but the resulting luminance curve is completely different from when doing the same using MadVR in HDR mode. MadVR says my HDR 50% is 94nit, internal HDR pattern says it's 136nit...which do I trust?

Paul

Sony X900F SDR and HDR Calibrations https://www.avsforum.com/forum/166-l...l#post57551552

Last edited by Anderegg; 05-04-2019 at 08:03 PM.
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post #10 of 15 Old 05-04-2019, 08:02 PM
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Originally Posted by Anderegg View Post
What is the point of the HDR checkbox in the HCFR pattern generator menu...I check it off, HCFR switches my TV to HDR10 mode, the internal patterns show, but the resulting luminance curve is completely different from when doing the same using MadVR in HDR mode. MadVR says my HDR 50% is 94nit, internal HDR pattern says it's 136nit...which do I trust?

Paul
I’ve always used the internal patterns and HDR 50% is 94 nits.

The HDR checkbox allows metadata to be sent to place the display in HDR mode. That only works with certain nVidia graphics cards.
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post #11 of 15 Old 05-04-2019, 08:09 PM
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I guess I should download a 50% HDR10 pattern video file and hit my HDMI input with that from my BlueRay player just to confirm which pattern is correct...where can I quickly get a 50% HDR10 video clip for testing?

I use Nvidia cards in all my PC's, and the HDR toggle in MadVR and HCFR works to force my TV into HDR10 even if I am not in Windows HDR mode and even if I am on my old Windows 7 PC. This causes severe issues on my second SDR monitor which just basically goes DOA as soon as the TV goes HDR...can't seem to find a way to limit the HDR toggle to only the primary TV output and not my control graph monitor.

Paul

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Originally Posted by Dominic Chan View Post
I’ve always used the internal patterns and HDR 50% is 94 nits.

The HDR checkbox allows metadata to be sent to place the display in HDR mode. That only works with certain nVidia graphics cards.

Sony X900F SDR and HDR Calibrations https://www.avsforum.com/forum/166-l...l#post57551552
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post #12 of 15 Old 05-04-2019, 08:17 PM
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Originally Posted by Anderegg View Post
I guess I should download a 50% HDR10 pattern video file and hit my HDMI input with that from my BlueRay player just to confirm which pattern is correct...where can I quickly get a 50% HDR10 video clip for testing?
https://www.avsforum.com/forum/139-d...terns-set.html
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post #13 of 15 Old 05-04-2019, 08:39 PM
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Thanks Dom, playback of 94nit test pattern showed 98nit (level 129) on HCFR using my calibrated settings from MadVR patterns...so any idea why my internal HCFR HDR patterns don't match? At least I know my calibration baseline so I can confirm when I get the internal generator working properly in HDR...MadVR is somewhat difficult to work with being always on top full screen etc.

Paul

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Originally Posted by Dominic Chan View Post

Sony X900F SDR and HDR Calibrations https://www.avsforum.com/forum/166-l...l#post57551552
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post #14 of 15 Old 05-04-2019, 09:14 PM
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Quote:
Originally Posted by Anderegg View Post
Thanks Dom, playback of 94nit test pattern showed 98nit (level 129) on HCFR using my calibrated settings from MadVR patterns...so any idea why my internal HCFR HDR patterns don't match? At least I know my calibration baseline so I can confirm when I get the internal generator working properly in HDR...MadVR is somewhat difficult to work with being always on top full screen etc.

Paul
Crap, nevermind, figured out that HDR internal patterns only work GDI full screen, GDI window, or floating window do not work right.

Paul

Sony X900F SDR and HDR Calibrations https://www.avsforum.com/forum/166-l...l#post57551552
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post #15 of 15 Old 05-05-2019, 07:38 AM
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Crap, nevermind, figured out that HDR internal patterns only work GDI full screen, GDI window, or floating window do not work right.

Paul
I have never seen HCFR produce different output levels for GDI full screen vs GDI window.
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