Theory About Intel's HDMI Quantization Range Setting (Full 0-255) - Page 8 - AVS Forum | Home Theater Discussions And Reviews
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post #211 of 220 Old 03-01-2015, 07:51 PM
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hi I'm running intel i5 4440. The blacks looks grey and it's been driving crazy. This thread is 2yrs old and I was just wondering if the old hack is still current.


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Originally Posted by Wizziwig View Post
Wow... lots of great developments since I started this thread almost 4 months ago.

I can confirm that the registry setting works on both Sandy Bridge and Haswell iGPU. Glad this has finally been resolved after all these years.

Combined with the best available refresh rate accuracy for 23.976 and 59.940 content, the Haswell iGPU is now unbeatable for most HTPC usage.
how do I make it 0?

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Originally Posted by Foxbat121 View Post
Intel IGD will always convert 0-255 into 16-235 on your HDTV via HDMI (read this thread). You will have to use the registry key override posted in last page to force intel not to convert. So, did you use that registry hack when you posted that?
which registry hack did you use?


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Originally Posted by olyteddy View Post
This is a photo of a cheap Vizio 26" TV fed by an i7-2600 (HD2000 graphics). I've had no trouble getting 0-255 on either of my Vizios, both of which are fed by Intel HD graphics.


Here's the whole testchart:
<a class="attachment loginreq" href="/attachments/72478" title="">testchart.zip 122k .zip file
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post #212 of 220 Old 03-01-2015, 08:37 PM
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Quote:
Originally Posted by SweetLow View Post


Anyone, who want FullRange RGB HDMI output on Intel Graphic may try this:
1. Find your current Intel Graphic Adapter software registry instance under:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}\xxxx
(0000 on my PC).
2.Create DWORD value:
EnableRGBFullRange
and set it to 1
3. Reboot.
4. Enjoy.

AM I doing it wrong? why isn't it working? I shut it down and reset after following all 4 steps.

IT seriously took me an hour just to get this far. Please help.

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post #213 of 220 Old 03-02-2015, 06:57 AM
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IIRC, new Intel drivers added necessary UI for you to choose output range. No hacks needed but the hack will still work (you just need to find out the correct driver reg key to apply the hack).


Also, there are other issues you need to consider. The hack is only to override video driver settings (so it won't try to convert) but the particular video player of your choice may still output video at limited range instead of full range. You will need to make sure playback software, video driver and TV all configured correctly. There is no magic fix.
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post #214 of 220 Old 03-02-2015, 07:13 AM
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Quote:
Originally Posted by Foxbat121 View Post
IIRC, new Intel drivers added necessary UI for you to choose output range. No hacks needed but the hack will still work (you just need to find out the correct driver reg key to apply the hack).


Also, there are other issues you need to consider. The hack is only to override video driver settings (so it won't try to convert) but the particular video player of your choice may still output video at limited range instead of full range. You will need to make sure playback software, video driver and TV all configured correctly. There is no magic fix.
What do you do with the settings under color management/advanced/ windows color system defaults and icc rendering intent? Seems that these would also affect your output....would it not?
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post #215 of 220 Old 03-02-2015, 05:43 PM
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Quote:
Originally Posted by JimP View Post
What do you do with the settings under color management/advanced/ windows color system defaults and icc rendering intent? Seems that these would also affect your output....would it not?
No, those are typically for photo display, not affecting video playback at all.


Remember videos are always produced using limited range (16 as darkest black and 235 as brightest white). It will never match well with the default PC display range (0 as darkest black, 255 as brightest white) unless someone does the properly conversion. HDTVs, cable box, DVD and BD players are all designed to use limited range as its standard format, not the PC full range.
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post #216 of 220 Old 03-02-2015, 07:12 PM
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Quote:
Originally Posted by Foxbat121 View Post
you just need to find out the correct driver reg key to apply the hack).
So I had to input a reg key on registry ???? I'm not good with computers so you gotta explain to me in steps.
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post #217 of 220 Old 03-03-2015, 03:29 AM
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Quote:
Originally Posted by viziotvowner View Post
So I had to input a reg key on registry ???? I'm not good with computers so you gotta explain to me in steps.
No, just follow the instructions carefully. Or, you can google for a tool that can set the registry for you written by fellow forum member.


But remember, that's just one of the 3 major factors in determine the final outcome of a video black level. The other two are the video player software and HDTV. All three have to be perfectly matched. Yes, either one can be configured to use either full range or limited range.
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post #218 of 220 Old 03-04-2015, 01:13 PM
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Quote:
Originally Posted by Foxbat121 View Post
IIRC, new Intel drivers added necessary UI for you to choose output range.
For right hardware only.
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post #219 of 220 Old 03-10-2015, 03:39 PM
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I just had a bear of a weekend with my i3 NUC. The short version is that I do not believe that the latest drivers output "full range" correctly, and the registry switch does not appear to work (at least for me) with the most recent driver version. Setting quantization to full range in the drivers and with registry entry results in significantly elevated blacks, measured at 0.3cdm2 vs my televisions true calibrated black point of 0.045cdm2.

Interestingly, the drivers versioned 10.18.10.3958 (https://downloadcenter.intel.com/search?keyword=153330) do not exhibit this behaviour, and do not have the "quantization range" setting in the control panel. The registry setting does however work and 0-255 output can be achieved via hdmi out with appropriate black levels.

The only way for me to get correct black and white levels out of the current drivers with my i3 nuc is to set drivers: limited, input range: limited, TV: limited. The desktop actually gets compressed down to 16-235 so there are not any crushed blacks or whites for desktop relative to video.


More importantly, I was also able to conclude that Intel's DXVA implementation is broken, and does not output correct colors relative to other rendering methods. Using my meter I observed that white and primary color outputs using DXVA decoding and rendering measured consistently and significantly different than the same video files decoded and rendered using XBMC Software, XBMC Pixel Shaders, and MadVR. Additionally, the latter 3 all agreed with same color measurements taken using HCFR GDI Image Generator, and png's in Firefox. Back when I had NVIDIA driving my htpc I did not have this problem.

For owners of Intel graphics who DIY/professionally calibrate their displays you must choose from a set of non-optimal scenarios.
1 - Calibrate your display using video files rendered via DXVA.
Pro: You are calibrating with the videochain you will be viewing media from
Con: Everything else will have varying levels of error in calibration

2 - Calibrate using any non-DXVA chain. Render and decode media files using, for example, XBMC with pixel shaders or software implementations
Pro: Consistent colors across all applications
Con: Software decoding is cpu heavy and causes my NUC fan to turn on, which is highly annoying.

3 - Chuck it and get hardware which works as advertised.

I went with 1 as I value silence, and am able to have a setup where all of my decoding goes through dxva. The error isn't large enough that I care or notice in system menus etc.

Hardware: Intel NUC D34010WYK, Samsung ES8000 LCD, Denon 2310 AVR
Software: Windows 7, XBMC (Kodi) 14
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post #220 of 220 Old 06-10-2015, 09:46 AM
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Black levels

Hello. I'm going crazy with black levels. Buy a ZOTAC ZBOX PI320, which has an Intel card, which I set in the panel as intel video ouput driver Graphic FULL RANGE, the GPU (registry hack windows in FULL RANGE), the Samsung TV from 2013 Limited range and xbmc (Kodi) Limited range in rank. All with auto rendering method (dxva I guess), hardware acceleration on and use DXVA2. This configuration gives it AVS 709 calibration disc with whiter than white (all bars flashing) and black bars from 17 to up flashin (i dont know if this its blacker than black). The problem is that certain video black levels are correct (almost all in low definition) and some have to enter OSD configuration during playback of a video and then lower the brightness level within kodi and black levels again be correct.) You can try these videos inside apple in kodi trailers. FELT trailer and trailer EXETER black levels give erroneous. Correct this with the brightness level of the OSD kodi. Then I'll make the avs 709 test and I see no bar to shine and if I try the trailer "Bound to Vengeance" scenes are too dark and lost many details. Some people recommend disabling the automatic rendering and put software rendering, in addition to clear the Use DXVA2. But then I have to put my TV to 65 brightness bars to see shining on 709 test avs
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