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There have been a lot of people asking me how they can tell if their UHD TV has a 10bit panel or not, so I made some 10bit Gradient test patterns. These will show discreet steps on an 8bit panel.

The test patterns are 2160p 10bit HEVC gradient grayscale patterns. There are two different clips, one is a gradient from black to white, and the other is a gradient from black to about 75% gray.

The clips are only 10 seconds long, so you might need to pause them so you can get a good look up close to the screen.

I have included both .MP4 and .TS versions for compatibility reasons. Both versions have the same elementary streams inside, they just have different containers.

Here is the link:

https://drive.google.com/file/d/0B68jIlCvW85gWFp0NVUwTFdTNFE/view?usp=sharing

Stacey Spears created a 2160p HEVC Rotating 8bit and 10bit Quantization Artifact test pattern. He gave me permission to post it here.

https://drive.google.com/file/d/0B68jIlCvW85gMW5aX21CbU1IOGs/view?usp=sharing
 

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I tried this on my Sony 850C which I thought was supposed to be an 8bit panel. But I don't see discreet steps.

It looks very smooth.

This was using a USB drive connected to the TV. And using the TVs default video player app, as well as the VLC video app and the Archos video app.

EDIT: I just tried the same files from my VTEN media player going through one of the HDMI inputs. Playing it that way I do see discreet steps.
 

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I tried this on my Sony 850C which I thought was supposed to be an 8bit panel. But I don't see discreet steps.

It looks very smooth.

This was using a USB drive connected to the TV. And using the TVs default video player app, as well as the VLC video app and the Archos video app.

EDIT: I just tried the same files from my VTEN media player going through one of the HDMI inputs. Playing it that way I do see discreet steps.
Just adding what Aaron posted on this in the other thread:

aaronwt said:
After some quick research the VTEN supposedly only outputs 10bit at up to 30P and only with 4:2:0 and 4:2:2 video(since it's only HDMI 1.4). And you can't force it to those. And with the auto video output it's apparently outputting 4:4:4 which it will only do 8 bit with.
 

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How do we know that the gradient was smooth because of a 10-bit panel and not because of dithering?

This is a concern with the 850C.
 
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How do we know that the gradient was smooth because of a 10-bit panel and not because of dithering?

This is a concern with the 850C.
Also the 850C shows more of the Rec 2020 color space than some sets with 10 bit panels or OLED.
 

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Also the 850C shows more of the Rec 2020 color space than some sets with 10 bit panels or OLED.
Yes, but correct me if I'm wrong. An 10-bit isn't required for WCG. Rec 2020 is just the ability to display more of the DCI space, while the panel bits just deals with the shades of color with in the displayable area of the DCI color space.

In theory couldn't you have a 12-bit panel that only displays rec.709?The Vizio M-series is a 10-bit panel that doesn't have WCG. The 850c does display better WCG then other TVs but isn't 68% below the Rec.2020 requirement?
 

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Originally Posted by SnipeUout View Post
How do we know that the gradient was smooth because of a 10-bit panel and not because of dithering?

This is a concern with the 850C.
I don't think so because :

FWIW I've seen 6 bit to 8 bit B/W & color gradation tests on a Sony Bravia R450a with a 6 bit + high frc Samsung SPVA overdrive dither panel and the gradations are nowhere near as smooth as these are although it makes pretty decent 8 bit color for a 6 bit overdrive panel .

Your PC may have one of those also it's not all that uncommon outside of the more expensive monitors

The OP's 10 bit color gradient test video file played from a USB drive into the embedded Sony X850C Video Player run time app shows it to have a 10 bit panel .

Unless I'm wrong I don't believe it's an 8 bit + high frc to 10 bits overdrive panel the gradation is smooth with almost no segmentation and maybe indicative of a 10 bit panel IMO also my PC 's dGPU identifies it as a 10 bit panel .
 

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There have been a lot of people asking me how they can tell if their UHD TV has a 10bit panel or not, so I made some 10bit Gradient test patterns. These will show discreet steps on an 8bit panel.

The test patterns are 2160p 10bit HEVC gradient grayscale patterns. There are two different clips, one is a gradient from black to white, and the other is a gradient from black to about 75% gray.

The clips are only 10 seconds long, so you might need to pause them so you can get a good look up close to the screen.

I have included both .MP4 and .TS versions for compatibility reasons. Both versions have the same elementary streams inside, they just have different containers.

Here is the link:

https://drive.google.com/file/d/0B68jIlCvW85gTExvd01uYWVxRkk/view?pref=2&pli=1
Excellent!
On a 920V OLED Tv it shows some gradient bars (aprox 6mm) only in the darker areas. It has started a debate whether current OLEDS are actually 10bit or if they have problems rendering at near black.

Could you possibly make a similar ramp at 8 bit for comparison?
 

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Yes, but correct me if I'm wrong. An 10-bit isn't required for WCG. Rec 2020 is just the ability to display more of the DCI space, while the panel bits just deals with the shades of color with in the displayable area of the DCI color space.

In theory couldn't you have a 12-bit panel that only displays rec.709?The Vizio M-series is a 10-bit panel that doesn't have WCG. The 850c does display better WCG then other TVs but isn't 68% below the Rec.2020 requirement?
I figured the more colors a TV can show the smoother this test would be. And I figured any 10bit panel should have been able to show more colors than an 8bit panel. But I guess this is not necessarily the case.
 

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I figured the more colors a TV can show the smoother this test would be. And I figured any 10bit panel should have been able to show more colors than an 8bit panel. But I guess this is not necessarily the case.
Bit depth gives you steps in a color.

So with 8bit you get 256 steps of red, green, blue and gray.
But all 256 steps of red are exactly the same shade of red, and they could be any shade of red depending on the quality of the display.

Going to 10bit give 1024 steps. But doesn't change how much color is available.
 

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Bit depth gives you steps in a color.

So with 8bit you get 256 steps of red, green, blue and gray.
But all 256 steps of red are exactly the same shade of red, and they could be any shade of red depending on the quality of the display.

Going to 10bit give 1024 steps. But doesn't change how much color is available.
If I'm right ...the way I get it basically is bit depth = steps or gradients within a color space /gamut higher bit depth = more and smother steps within the color gamut /space and a wider color gamut and or color space means more colors like bt709 vs P3 DCI or rec 2020 .
 

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If I'm right ...the way I get it basically is bit depth = steps or gradients within a color space /gamut higher bit depth = more and smother steps within the color gamut /space and a wider color gamut and or color space means more colors like bt709 vs P3 DCI or rec 2020 .
Right, and those color spaces are defined by the backlight technology and the color filters used in a display.

With a wide enough gamut you may start to need more bits to make smooth transitions, but the number of extra bits isn't that much. For instance BT.709 is about 56% coverage of the uv space rec.2020 cover. So in order to cover rec.2020 with as much bit depth as 709 uses, you'd only need 9 bits. Granted for monochromatic transitions I still think we need at least 10 bits.
 

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Right, and those color spaces are defined by the backlight technology and the color filters used in a display.

With a wide enough gamut you may start to need more bits to make smooth transitions, but the number of extra bits isn't that much. For instance BT.709 is about 56% coverage of the uv space rec.2020 cover. So in order to cover rec.2020 with as much bit depth as 709 uses, you'd only need 9 bits. Granted for monochromatic transitions I still think we need at least 10 bits.
Cool .....I read somewhere that rec 2020 '10 bit color' is actually or was 11 bits it seemed like a legitimate technical website about LCD technology it was out of the UK ....it wasn't a forum .
 

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"Season 4", you mean page four don't you?

I have had those discs for some time.
 

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What type of account do you have? Sounds as it's one of those "streaming" deals.
I only have a DVD rental account.
 
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