Dolby Vision is significantly altering colors. Why?

[Noremac Mij]

Originally Posted by Buck Turgidson

So what's the issue exactly? I have a panasonic 820 with an LG C1 65". The DV looks good to me is there something I'm missing?

All else being equal, it seems like at least on my C8, the Dolby Vision Cinema User picture setting is desaturating the colours. Dolby Vision Cinema “Home” User looks about the same as HDR10.

[oddbox83]

If LG TVs say “User” after the preset name, doesn’t that mean it’s been altered from the preset?

[Noremac Mij]

Originally Posted by oddbox83

If LG TVs say “User” after the preset name, doesn’t that mean it’s been altered from the preset?

Both Cinema presets say User. Both calibrated the same. Yet there’s an obvious difference between the two. Not sure why or what LG is doing.

[oddbox83]

Originally Posted by Noremac Mij

Both Cinema presets say User. Both calibrated the same. Yet there’s an obvious difference between the two. Not sure why or what LG is doing.

Then surely that indicates both have been tinkered with and aren’t at LGs factory settings. If it hasn’t been professionally calibrated, you can’t be blaming LG if they are no longer at presets.

[Geoff D]

Originally Posted by Noremac Mij

All else being equal, it seems like at least on my C8, the Dolby Vision Cinema User picture setting is desaturating the colours. Dolby Vision Cinema “Home” User looks about the same as HDR10.

Or it's actually showing them as they should be and maybe you're forcing a wider gamut on HDR10 which is oversaturating it? That's a question, not an attack.

[ronand]

On LG sets Cinema and Cinema Home give different results (obviously). Out of the box the "cinema home" seems better to my eyes. Cinema is supposed to replicate a theatre environment but I find it a bit on the cool side on my set and don't use it.

[Noremac Mij]

Originally Posted by Geoff D

Or it's actually showing them as they should be and maybe you're forcing a wider gamut on HDR10 which is oversaturating it? That's a question, not an attack.

I posted pictures of Wide gamut as well as Auto gamut on the previous page. Take a look at those 4 pictures. Only the Dolby Vision Cinema User (last picture) looks desaturated. The rest look fine to me. Dolby Vision looks good on the Dolby Vision Cinema Home User setting.

[kristoffer]

At about 5 min. in thry talking about the most accurate DV mode on the newest LG OLEDS
“Cinema Home switches on DV vision IQ” and DV Cinema is the most accurate mode.

YouTube

[INdetectableMAN]

Originally Posted by Buck Turgidson

So what's the issue exactly? I have a panasonic 820 with an LG C1 65". The DV looks good to me is there something I'm missing?

Dolby Vision should be the most accurate HDR format, but the truth is that Sony and LG are not.

In LG, Cinema mode, you have already seen how the image is darker throughout the EOTF tracking. For example, at 50% stimulus where it should be 100 nits the LG displays 50.

CALMAN / LG 65C1 DOLBY VISION CINEMA FW 03.33.11


CHROMAPURE PROFESIONAL / LG 65C1 DOLBY VISION CINEMA FW 03.33.11


Reviewers insist in their reviews on how correct EOTF ST2084 HDR10 tracking is on LG and Sony displays, but deliberately leave out Dolby Vision accuracy when most HDR content we watch is Dolby Vision.

If you want to see Dolby Vision properly, you need a Panasonic OLED in LED-TV mode.

In LG C1 the Home Theater mode is imprecise, and the Cinema mode, which is the mode that should be rigorously faithful, is not either because it tracks PQ inaccurately, which is somewhat darker than it should be, and this is not can calibrate, you have to live with it.

However, it is not something that is fortunately perceived to the point of ruining the viewing experience, but since the image is somewhat darker in its most critical part, you should be in a completely dark environment to try to alleviate, in the as much as possible, the effect, but whatever you do, your C1 is not accurate in Dolby Vision, and neither is any LG or Sony.

What's more, if you put a 0% stimulus, you will see how the black is not zero, what on the LG it is partially raised. You can't fix this, because if you drop the brightness one notch you will squash the shadow detail.


https://www.avsforum.com/threads/dol...-oled.3175856/

Ultimately, if you're looking for 100% accuracy, don't go with LG and Sony on Dolby Vision, go with calibration 3DLUT SDR or HDR10 up to 1000 nits. And at LG I also don't use DTM Dynamic Tone Mapping in HDR because it's grossly inaccurate.

[CreasyBear]

Originally Posted by Buck Turgidson

So what's the issue exactly? I have a panasonic 820 with an LG C1 65". The DV looks good to me is there something I'm missing?

No, because you're a sane person using normal settings who understands what natural skin tone is supposed to look like.

[CreasyBear]

Originally Posted by INdetectableMAN

[Show spoiler]Dolby Vision should be the most accurate HDR format, but the truth is that Sony and LG are not.

In LG, Cinema mode, you have already seen how the image is darker throughout the EOTF tracking. For example, at 50% stimulus where it should be 100 nits the LG displays 50.

CALMAN / LG 65C1 DOLBY VISION CINEMA FW 03.33.11


CHROMAPURE PROFESIONAL / LG 65C1 DOLBY VISION CINEMA FW 03.33.11


Reviewers insist in their reviews on how correct EOTF ST2084 HDR10 tracking is on LG and Sony displays, but deliberately leave out Dolby Vision accuracy when most HDR content we watch is Dolby Vision.

If you want to see Dolby Vision properly, you need a Panasonic OLED in LED-TV mode.

In LG C1 the Home Theater mode is imprecise, and the Cinema mode, which is the mode that should be rigorously faithful, is not either because it tracks PQ inaccurately, which is somewhat darker than it should be, and this is not can calibrate, you have to live with it.

However, it is not something that is fortunately perceived to the point of ruining the viewing experience, but since the image is somewhat darker in its most critical part, you should be in a completely dark environment to try to alleviate, in the as much as possible, the effect, but whatever you do, your C1 is not accurate in Dolby Vision, and neither is any LG or Sony.

What's more, if you put a 0% stimulus, you will see how the black is not zero, what on the LG it is partially raised. You can't fix this, because if you drop the brightness one notch you will squash the shadow detail.


https://www.avsforum.com/threads/dol...-oled.3175856/

Ultimately, if you're looking for 100% accuracy, don't go with LG and Sony on Dolby Vision, go with 3DLUT or HDR10 calibrated SDR up to 1000 nits. And at LG I also don't use DTM Dynamic Tone Mapping in HDR because it's grossly inaccurate.

So play HDR discs in HDR10 calibrated SDR?

[INdetectableMAN]

Originally Posted by CreasyBear

So play HDR discs in HDR10 calibrated SDR?

No. SDR Calibrated SDR/709

HDR10 is done on PQ ST2084 / BT2020

[jess1581]

Since this is an intense subject on HDR maybe someone can help me with something. I don't have an LG or Sony, I have a Vizio QLED.... When I watch DV in calibrated dark, I notice something peculiar. There's some kind of backlight control going on except that settings is turned off. When there's a dark scene it's kinda dim, but when there is a light source that shows up in the scene, the brightness kicks up, daylight, flashlights, a well lit room, etc.

Example, if a scene has a panning shot of say a sunrise landscape and it gradually gets to the sun, the brightness gradually increases, and then decreases when the shot moves away from it. Like the backlight is reacting to light sources organically. I notice this the most when I have the setting menu up on screen off to the side. The brightness goes in and out whenever there's any light source in a scene.

I know there's local dimming, but mine doesn't have that according to reviews and specs. This only happens with Dolby Vision set to calibrated dark.

Anybody have any idea what it's doing?

[CreasyBear]

Originally Posted by jess1581

Since this is an intense subject on HDR maybe someone can help me with something. I don't have an LG or Sony, I have a Vizio QLED.... When I watch DV in calibrated dark, I notice something peculiar. There's some kind of backlight control going on except that settings is turned off. When there's a dark scene it's kinda dim, but when there is a light source that shows up in the scene, the brightness kicks up, daylight, flashlights, a well lit room, etc.

Example, if a scene has a panning shot of say a sunrise landscape and it gradually gets to the sun, the brightness gradually increases, and then decreases when the shot moves away from it. Like the backlight is reacting to light sources organically. I notice this the most when I have the setting menu up on screen off to the side. The brightness goes in and out whenever there's any light source in a scene.

I know there's local dimming, but mine doesn't have that according to reviews and specs. This only happens with Dolby Vision set to calibrated dark.

Anybody have any idea what it's doing?

Do you have the light sensor or auto dimming or whatever Vizio calls it turned on?

[jess1581]

Originally Posted by CreasyBear

Do you have the light sensor or auto dimming or whatever Vizio calls it turned on?

No nothing like that. And it only happens on DV calibrated dark, no other mode.

[Geoff D]

Originally Posted by jess1581

No nothing like that. And it only happens on DV calibrated dark, no other mode.

Sounds like the metadata isn't timed correctly, not by the disc but by the TV, this is why the brightness jumps are so pronounced. (Someone on here said their Panasonic OLED had the same issue with DV.)

[jess1581]

Originally Posted by Geoff D

Sounds like the metadata isn't timed correctly, not by the disc but by the TV, this is why the brightness jumps are so pronounced. (Someone on here said their Panasonic OLED had the same issue with DV.)

So the DV on my TV is not working right? It wouldn't be my player?

[SeeMoreDigital]

Originally Posted by jess1581

When I watch DV in calibrated dark, I notice something peculiar....

To confirm...

Are you spinning store bought discs or viewing content from genuine media service providers?

[jess1581]

Originally Posted by SeeMoreDigital

To confirm...

Are you spinning store bought discs or viewing content from genuine media service providers?

Store bought discs. To be honest I thought it was just something that calibrated dark did in conjunction with DV, but now I'm not so sure.

[SeeMoreDigital]

Originally Posted by jess1581

Store bought discs. To be honest I thought it was just something that calibrated dark did in conjunction with DV, but now I'm not so sure.

Just trying to ascertain more details about your Dolby Vision sources and playback device.

Sufficed to say, any "downloaded" content has not necessarily been muxed/re-muxed correctly with the appropriate meta-data flagging!