JVC RS4500 (native 4K laser projector)

[AVSCraig]

Are you guys feeding the projector SDR from the player letting it do the HDR to SDR convertion?
If so what SDR gamma are you running.?

No - 4K HDR. This projector is HDR capable. Watching 4K Blu-rays with a Panasonic UB900, using the projector's HDR pre-set mode. 

[AVSMike]

Are you guys feeding the projector SDR from the player letting it do the HDR to SDR convertion?
If so what SDR gamma are you running.?

If watching 4K with HDR, I do not convert it to SDR.

[jetsen]

Are you guys feeding the projector SDR from the player letting it do the HDR to SDR convertion?
If so what SDR gamma are you running.?

Also watching HDR with the Panasonic, with the new added dynamic range feature on the Panasonic mostly on +5, laser in mid and auto laser dimming mode on 2.
I like what I see so far, no complaints a little to much noise perhaps as the Z1 is right above my head and in mid laser it gets a bit louder.

[stridsvognen]

Also watching HDR with the Panasonic, with the new added dynamic range feature on the Panasonic mostly on +5, laser in mid and auto laser dimming mode on 2.
I like what I see so far, no complaints a little to much noise perhaps as the Z1 is right above my head and in mid laser it gets a bit louder.

Can you please snap a picture of the panasonic menu where you set the new dynamic range feature.

Have any of you trying to calibrate a lower gamma, and not touching the clipping poins, preserving the full level of information, just compressing it a bit by straightening out the gamma, wich ramps it out of black faster ?
Not adjusting in the player as it seems to always add clipping.

It looks to me like the SDR output of the Panasonic (HDR converted to SDR) will work much better if the projector is calibrated to around 2.0-2.2 SDR gamma, depending the movie, and not touching the convertion slider in the player.
I do it in a Lumagen radiance to manipulate the gamma curve, i wonder how that would work on the JVC.

[AVSCraig]

Can you please snap a picture of the panasonic menu where you set the new dynamic range feature.

Have any of you trying to calibrate a lower gamma, and not touching the clipping poins, preserving the full level of information, just compressing it a bit by straightening out the gamma, wich ramps it out of black faster ?
Not adjusting in the player as it seems to always add clipping.

It looks to me like the SDR output of the Panasonic (HDR converted to SDR) will work much better if the projector is calibrated to around 2.0-2.2 SDR gamma, depending the movie, and not touching the convertion slider in the player.
I do it in a Lumagen radiance to manipulate the gamma curve, i wonder how that would work on the JVC.

JVC RS4500 (native 4K laser projector)

That's the best I can do right now - but you will only see the slider on the actual on screen menu with a 4K HDR signal present if I'm not mistaken. 

[stridsvognen]

So its actually the same thing as the HDR convertion adjustment slider, to compensate for missing light output in the display device by just adjusting the white clipping point/ contrast.?

I wonder why nobody can make a true gamma adjustment feature where they just adjust the gamma curve without messing up the clipping points, Lumagen do the same thing setting the gamma factor, it messes up both ends.

Would be interested to hear if anyone here have experience with calibrating the gamma curve in the projector instead, maintaining the full range of image information.

[stanger89]

Can you please snap a picture of the panasonic menu where you set the new dynamic range feature.

Have any of you trying to calibrate a lower gamma, and not touching the clipping poins, preserving the full level of information, just compressing it a bit by straightening out the gamma, wich ramps it out of black faster ?
Not adjusting in the player as it seems to always add clipping.

It looks to me like the SDR output of the Panasonic (HDR converted to SDR) will work much better if the projector is calibrated to around 2.0-2.2 SDR gamma, depending the movie, and not touching the convertion slider in the player.
I do it in a Lumagen radiance to manipulate the gamma curve, i wonder how that would work on the JVC.

That's what all of use with RSX00's are doing with Arve's tool and custom "gammas".  There's a ton of info in the RS600 and V6 autocal threads in the other forum. 

[AVSCraig]

[stridsvognen]

Whats going on with the SMPTE pattern here, that looks all messed up, is that normal.?

[AVSCraig]

Whats going on with the SMPTE pattern here, that looks all messed up, is that normal.?

Don't know what they are doing or feeding it. Kris Deering thought the scaling was top notch.

[Madfloyd]

Whats going on with the SMPTE pattern here, that looks all messed up, is that normal.?

Pardon my ignorance, but what's messed up about it?

[stridsvognen]

Pardon my ignorance, but what's messed up about it?

The resolution section changes colors and distorted, might be some convergence scaling, or other kind of enhancement processing.

Ill guess someone here with the projector has tested it, and know if its normal.. Do you guys have a UHD SMPTE pattern as well.?

[jetsen]

The resolution section changes colors and distorted, might be some convergence scaling, or other kind of enhancement processing.

Ill guess someone here with the projector has tested it, and know if its normal.. Do you guys have a UHD SMPTE pattern as well.?

I can't recall that I have seen this kind of problems when testing it, i think there is an UHD SMPTE pattern in the 4K Muridio generator, i will try and test it again when I have the time, but I can't imagine that someone is feeding a Z1 with interlaced signals.

[stridsvognen]

I can't recall that I have seen this kind of problems when testing it, i think there is an UHD SMPTE pattern in the 4K Muridio generator, i will try and test it again when I have the time, but I can't imagine that someone is feeding a Z1 with interlaced signals.

The one shown in the video is the 1920 x 1080 pattern, so its nothing to do with interlaced signals, i guess it might be the upscaling messing it up, but if someone had a UHD SMPTE pattern it would be fun to see if its capable of resolving that one, and also find out whats going on with the upscaled pattern.

Is the Z1 panels aligned mecanically so they are converging perfect, or are they using a convergence adjustment that adds processing.?

[Kris Deering]

Or is it possible this is an artifact from the video itself. I didn't look at that pattern with the RS4500. I looked at others though and saw no issues. May have panel alignment on, or not in native for aspect. There are A LOT of settings that can have effects on fine resolution patterns. You just have to start from 0 and see how it goes.