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Can the EDID on the Q90R be read to determine if it supports TV variant 4K120 and perhaps point to an nvidia driver bug?
I laboriously parsed through the EDID data by hand, because I couldn't find a piece of software that reliably decoded all of it, and I figured in doing so I'd understand the standards a bit better.

I compared the EDID I got reading from both a straight HDMI 2.0b connection and from the Club3D HDMI 2.1 active adapter. They were identical, which is how it should be. The way Nvidia presents the results in its control panel is confusing, though; more on that below. Much of the info for parsing comes from CTA-861-G, which defines the standard profile for Digital TVs. Among other things, it defines extension data that appears within the overall EDID data; the base EDID data is defined by VESA. A small amount of info comes from the HDMI specification.

Here are the formats that the Q90R advertises using a data block within the CTA extension data, with various restrictions:

4096x2160p120 **
4096x2160p100 **
4096x2160p60 *
4096x2160p50 *
4096x2160p30
4096x2160p24
3840x2160p120 **
3840x2160p100 **
3840x2160p60 *
3840x2160p50 *
3840x2160p30
3840x2160p25
3840x2160p24
2560x1440p120 ***
1920x1080p120
1920x1080p100
1920x1080p60
1920x1080p50
1920x1080p30
1920x1080p25
1920x1080p24
1920x1080i60
1920x1080i50
1280x720p60
1280x720p50
720x576p50
720x480p60
720x576i50
720x480i60

With one exception, noted below, all of these formats are specifically defined in CTA-861-G.

In another EDID extension block, this one defined in the HDMI specification, the Q90R advertises that it supports 4:4:4, 10-bit, and 12-bit deep color modes. In yet another EDID extension block, also defined in the HDMI specification, the Q90R specifies that it only supports 4:2:0 for 10-bit color, not for 12-bit. The HDMI specification requires that 8-bit 4:2:0 also be supported for any format that supports any 4:2:0 deep color, so that's simply implied.

Just to make 4:2:0 even more complex, there are two more CTA data blocks that come into play. In one data block, the Q90R specifies that only 4 formats, the ones with a single * above, support 4:2:0 in addition to the color formats defined elsewhere. In the second data block, the Q90R specifies that 4 formats, the ones with a double ** above, only support 4:2:0, and nothing else.

So, put all that together, and the Q90R says 3840/4096x2160p100/120 can only be done with 8/10-bit 4:2:0, and 3840x2160p50/60 are the only other formats that support 8/10-bit 4:2:0.

There's one further wrinkle, which is the 2560x1440p120 format, marked with triple *** above. This format is not actually defined in CTA-861-G. The CTA extension block allows optional data blocks that can define arbitrary additional supported formats, and the Q90R uses that to advertise this format. You may ask where is 2560x1440p60 defined; well, turns out it's defined in the base VESA EDID data, so it's kind of a peculiar split.

Now, how to reconcile this with what you see in the Nvidia control panel? Beats me. Nvidia is categorizing some CTA resolutions as "PC" resolutions, and conversely categorizing some VESA resolutions (like 1680x1050) as "Ultra HD, HD, SD" resolutions. Seems somewhat arbitrary to me, but in the end it's just a categorization thing, not a protocol thing.

So, assuming I have understood things correctly this time, my take is that if the new consoles do turn out to support [email protected] 10-bit 4:2:0, then they should work with the Q90R. And apologies for any confusion I've caused before.
 

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I laboriously parsed through the EDID data by hand, because I couldn't find a piece of software that reliably decoded all of it, and I figured in doing so I'd understand the standards a bit better.

I compared the EDID I got reading from both a straight HDMI 2.0b connection and from the Club3D HDMI 2.1 active adapter. They were identical, which is how it should be. The way Nvidia presents the results in its control panel is confusing, though; more on that below. Much of the info for parsing comes from CTA-861-G, which defines the standard profile for Digital TVs. Among other things, it defines extension data that appears within the overall EDID data; the base EDID data is defined by VESA. A small amount of info comes from the HDMI specification.

Here are the formats that the Q90R advertises using a data block within the CTA extension data, with various restrictions:

4096x2160p120 **
4096x2160p100 **
4096x2160p60 *
4096x2160p50 *
4096x2160p30
4096x2160p24
3840x2160p120 **
3840x2160p100 **
3840x2160p60 *
3840x2160p50 *
3840x2160p30
3840x2160p25
3840x2160p24
2560x1440p120 ***
1920x1080p120
1920x1080p100
1920x1080p60
1920x1080p50
1920x1080p30
1920x1080p25
1920x1080p24
1920x1080i60
1920x1080i50
1280x720p60
1280x720p50
720x576p50
720x480p60
720x576i50
720x480i60

With one exception, noted below, all of these formats are specifically defined in CTA-861-G.

In another EDID extension block, this one defined in the HDMI specification, the Q90R advertises that it supports 4:4:4, 10-bit, and 12-bit deep color modes. In yet another EDID extension block, also defined in the HDMI specification, the Q90R specifies that it only supports 4:2:0 for 10-bit color, not for 12-bit. The HDMI specification requires that 8-bit 4:2:0 also be supported for any format that supports any 4:2:0 deep color, so that's simply implied.

Just to make 4:2:0 even more complex, there are two more CTA data blocks that come into play. In one data block, the Q90R specifies that only 4 formats, the ones with a single * above, support 4:2:0 in addition to the color formats defined elsewhere. In the second data block, the Q90R specifies that 4 formats, the ones with a double ** above, only support 4:2:0, and nothing else.

So, put all that together, and the Q90R says 3840/4096x2160p100/120 can only be done with 8/10-bit 4:2:0, and 3840x2160p50/60 are the only other formats that support 8/10-bit 4:2:0.

There's one further wrinkle, which is the 2560x1440p120 format, marked with triple *** above. This format is not actually defined in CTA-861-G. The CTA extension block allows optional data blocks that can define arbitrary additional supported formats, and the Q90R uses that to advertise this format. You may ask where is 2560x1440p60 defined; well, turns out it's defined in the base VESA EDID data, so it's kind of a peculiar split.

Now, how to reconcile this with what you see in the Nvidia control panel? Beats me. Nvidia is categorizing some CTA resolutions as "PC" resolutions, and conversely categorizing some VESA resolutions (like 1680x1050) as "Ultra HD, HD, SD" resolutions. Seems somewhat arbitrary to me, but in the end it's just a categorization thing, not a protocol thing.

So, assuming I have understood things correctly this time, my take is that if the new consoles do turn out to support [email protected] 10-bit 4:2:0, then they should work with the Q90R. And apologies for any confusion I've caused before.
Amazing work!
 

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Would a 4:2:2 option work for 4:2:0?
The consoles seem to always favour an 'auto' option by default so I see no reason why they wouldn't work with 420. The Nvidia driver also has an 'auto' option but it's dumb and will send 8bit regardless if you have HDR turned off/on in Windows. You have to manually select 10bit.
 

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I got tired of waiting for the eARC update and caved into getting the HDFury AVR Key (https://www.amazon.com/dp/B07DBB31HP/ref=cm_sw_r_cp_apa_i_2tWEFbY4AF1F4). I hate that we have to buy stuff like this to get the most out of a TV that costs so much. The AVR Key works great for my Xbox One X with my Q90R and my Pio SC-LX904, almost like it's directly connected to both. No more HDR stripping and no more lack of Atmos, though the refresh rate (defaults to [email protected]), ALL, and VRR are not selectable on the Xbox.

Sent from my SM-N986U using Tapatalk
 

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I got tired of waiting for the eARC update and caved into getting the HDFury AVR Key (Amazon.com: HDFury AVR Key 18Gbps with Enlarged Heatsink | HDMI Audio Extractor | 4K HDR Splitter). I hate that we have to buy stuff like this to get the most out of a TV that costs so much. The AVR Key works great for my Xbox One X with my Q90R and my Pio SC-LX904, almost like it's directly connected to both. No more HDR stripping and no more lack of Atmos, though the refresh rate (defaults to [email protected]), ALL, and VRR are not selectable on the Xbox.

Sent from my SM-N986U using Tapatalk
So if you don't get VRR, what does this get someone who has the XBox hooked directly into the sound bar for Atmos?
 

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So if you don't get VRR, what does this get someone who has the XBox hooked directly into the sound bar for Atmos?
My AVR was not allowing 4K HDR for Games and Movies at the higher bit rates. I had mostly red on my TV capabilities going through AVR, with AVR Key I now have all green checks (like when I connect directly to TV) except Dolby Vision (because our TV doesn't support DV).

Sent from my SM-N986U using Tapatalk
 

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Whats everybody's thoughts on running the OCB fiber through a wall above a ventless gas fireplace?

Sent from my SM-G973U using Tapatalk
 

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Whats everybody's thoughts on running the OCB fiber through a wall above a ventless gas fireplace?

Sent from my SM-G973U using Tapatalk
I don't think it's a great idea but plenty of people do it anyway.
 
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Hi everyone ... I have the Q90 65 and overall pleased, except for Directv 4k live sports. For some reason football, golf, etc that is on one of their dedicated 4k channels is so dark. I've toggled settings, including turning HDR on/off and very little change. The only thing that made a small difference was changing Color Space from native to auto. All other content on Directv is fine ... Streaming via Nvidia Shield is fine ... and Blu-Rays are fine! Just Directv live sports are dark.

I opened this thread over on Directv/AT&T to try and get help on that front.

Thanks in advance!
Rob
 

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Hi everyone ... I have the Q90 65 and overall pleased, except for Directv 4k live sports. For some reason football, golf, etc that is on one of their dedicated 4k channels is so dark. I've toggled settings, including turning HDR on/off and very little change. The only thing that made a small difference was changing Color Space from native to auto. All other content on Directv is fine ... Streaming via Nvidia Shield is fine ... and Blu-Rays are fine! Just Directv live sports are dark.

I opened this thread over on Directv/AT&T to try and get help on that front.

Thanks in advance!
Rob
Does other 4k HDR channel content have the same issue?

Do you see HDR engaged on the Picture Mode (e.g., Movie Mode)?

On my 82", all looks good. Some potential settings in Picture Expert Settings to look at that I have. Your results may vary:

Digital Clean View is Off
Local Dimming is High
Contrast Enhancer is Off
Color Tone is Warm2

HLG is 3. I notice if I lower this, the picture gets darker.

Color Space is Auto. Native makes the picture darker.

Any of this help?
 

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HI I am new here. I am just wondering whether Q90R supports 4k 60hz 10Bit RGB or not as it seems new gaming consoles are aiming to reach 4k 60hz HDR for most of AAA games. I do not think XSX can display 4k 120hz HDR without compromising graphic options. If Q90R can display 4k 60hz 10Bit RGB properly, It would be more than enough for me to play next gen games until "PS6"
 

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The TV was delivered promptly in the time window specified, no damage. Assembly of the base and set up to your home Wifi and cable provider is super simple, takes less than 15 minutes and minimal lifting help for such a large TV. I've had it running for around a years thus far, no issues. The picture quality is exceptional, sound appropriate for built in speakers, mine will eventually be connected to a surround system, as likey most people will do with a TV of this size. Overall very happy with the purchase.
 

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I am just wondering whether Q90R supports 4k 60hz 10Bit RGB
I should add, though, that to get 4:4:4 to display correctly you need to be in PC mode, and for HDR that results in a fairly significant drop in peak brightness, so using 10-bit RGB vs 10-bit YCbCr 4:2:2 is a tradeoff.
 

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Life ain't easy for a PC user. I normally use the TV as a monitor, running 1080p/120 in PC mode. If I want to watch a 4k HDR movie, I need to change resolution and turn on HDR in windows, switch the input from PC mode, switch to movie mode. Reverse all of that after the movie. None of it can be scripted apparently, and no shortcuts.
 
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