HCFR automatic pattern generator - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 7 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 7 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 7 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 7 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, 2 views)
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post #5 of 7 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 7 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 7 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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