JVC RS3000

[AVSMike]

It’s around 5.1m if it’s in the back room ( projector room ). Low lamp mode.

If I put in shelf in room ( mid way ) it’s 4.40m
Thank you mike

In low lamp with wide open iris you are probably looking at 32/33FL. That is very bright for SDR. I would close the iris down to around -10 to -12 range. For HDR you could run in low with iris open or in high with iris closed down to around -5. It is easy to get used to all that brightness with iris fully open, but you are raising the black floor much higher than it should be and when your lamp ages, you have nowhere to go. 

[Franin]

In low lamp with wide open iris you are probably looking at 32/33FL. That is very bright for SDR. I would close the iris down to around -10 to -12 range. For HDR you could run in low with iris open or in high with iris closed down to around -5. It is easy to get used to all that brightness with iris fully open, but you are raising the black floor much higher than it should be and when your lamp ages, you have nowhere to go.

Thanks Mike but I’m in low lamp for HDR I’m trying -9 but manual atm. Doesn’t look too bad.

[woofer]

You REALLY need a light meter..

[AVSCraig]

Great article on the new HDR Dynamic Tone Mapping - 

https://www.soundandvision.com/content/hands-jvc-s-dynamic-tone-mapping-update

[AVSCraig]

You REALLY need a light meter..

It's a super handy item to have. Not having one is like riding high end bicycles but not owning a tire pressure gauge ! 

[DLCPhoto]

Great article on the new HDR Dynamic Tone Mapping -

https://www.soundandvision.com/content/hands-jvc-s-dynamic-tone-mapping-update

Interesting article - thanks!

Is there any reason JVC has apparently been so 'coy' about explaining more precisely how the various new options work?  There is plenty of speculation, but precious little information.

For example, with Frame-by-Frame "Auto" - is MetaData used to determine whether Low/Medium/High?  Is this determination a one-time event, or is it ongoing?  Kris said this in the article:

According to JVC, when in Auto mode the projector will measure the incoming video signal in real time and determine which level (Low/Medium/High) to use based on the brightness of the incoming frame or scene.

This almost implies it's a dynamic process, which would be interesting - having the Low/Medium/High scaling determined in a dynamic fashion, and then within that scaling, having the Dynamic Tone Mapping operate underneath that.  I'm not sure this really makes sense, though, or if this is what they meant to imply.

I'm not expecting them to reveal details of proprietary algorithms used, but defining how these options work, to provide some logical rationale for how to choose them, would certainly be useful.

[AVSCraig]

It is dynamic - it measures the video content, similar to what the Lumagen does. Metadata is unreliable or non existent half the time.

[DLCPhoto]

It is dynamic - it measures the video content, similar to what the Lumagen does. Metadata is unreliable or non existent half the time.

Interesting.  Many, including myself, had the impression that a single value (Low, Medium or high) was chosen when using Auto mode, based on whatever criteria JVC built into the process, and it stayed that way throughout.

But if the selection when in Auto mode may vary from one frame or scene to another, depending on the incoming signal, that could potentially provide optimal results, regardless of the content.  I'll have to explore using Auto, and see what it does, or doesn't do, with a variety of content.

Still, it would be extremely helpful if JVC put out a PDF of some type, not necessarily a formal 'White Paper' as such, but at least providing some level of detail as far as what the different options do, how they interact, more precise guidelines for their usage, etc.

Thanks for the reply, Craig.

[Franin]

You REALLY need a light meter..

Any recommendations of a good one woofer. Not too expensive but reliable as I will only use it a couple of times. 

[Franin]

Still, it would be extremely helpful if JVC put out a PDF of some type, not necessarily a formal 'White Paper' as such, but at least providing some level of detail as far as what the different options do, how they interact, more precise guidelines for their usage, etc.

I agree I would love to know what the different options do.

[Franin]

Just curious has anyone tried scene by scene vs frame by frame ? Ive tried it but couldn't see much difference. 

[AVSCraig]

Any recommendations of a good one woofer. Not too expensive but reliable as I will only use it a couple of times.

Cheap but seems to work -
Dr.Meter LX1330B Digital Illuminance/Light Meter, 0 - 200,000 Lux Luxmeter

Better but more expensive -
Sper Scientific 840020C Lux Light Meter

You will use one off and on as long as you own a projector.

[AVSCraig]

Interesting.  Many, including myself, had the impression that a single value (Low, Medium or high) was chosen when using Auto mode, based on whatever criteria JVC built into the process, and it stayed that way throughout.

But if the selection when in Auto mode may vary from one frame or scene to another, depending on the incoming signal, that could potentially provide optimal results, regardless of the content.  I'll have to explore using Auto, and see what it does, or doesn't do, with a variety of content.

Still, it would be extremely helpful if JVC put out a PDF of some type, not necessarily a formal 'White Paper' as such, but at least providing some level of detail as far as what the different options do, how they interact, more precise guidelines for their usage, etc.

Thanks for the reply, Craig.

That would be a static tone map - we already had that. The revolutionary thing about this is analyzes the video and adjusts the HDR frame by frame ( or scene by scene ).

[DLCPhoto]

That would be a static tone map - we already had that. The revolutionary thing about this is analyzes the video and adjusts the HDR frame by frame ( or scene by scene ).

We may be talking past each other here Craig.

I understand what the basic Dynamic Tone Mapping means, where it analyzes the image on a frame-by-frame or a scene-by-scene basis, completely different from any of the static Tone Mapping previously available.

What I'm questioning is what using the "Auto" setting does.  The other available options are Low, Medium, and High, and the quote from Kris Deering (reporting on what JVC told him) seemed to imply that the Auto setting is Dynamically assigning the Low, Medium, or High setting, based on the incoming visual signal.

So we seem to be looking at 2 different 'levels' of Dynamic modification of Tone Mapping: there's the frame-by-frame or scene-by-scene mapping, which seems relatively straightforward, but the quote implies that the assignment of Low, Medium, or High is also being dynamically adjusted.

In other words, we have Low, Medium, and High being dynamically assigned, which would seem to provide different parameters to govern the lower level frame-by-frame or scene-by-scene dynamic tone mapping.

Kind of hard to put in words, but hopefully this will clear it up.

[AVSCraig]

We may be talking past each other here Craig.

I understand what the basic Dynamic Tone Mapping means, where it analyzes the image on a frame-by-frame or a scene-by-scene basis, completely different from any of the static Tone Mapping previously available.

What I'm questioning is what using the "Auto" setting does.  The other available options are Low, Medium, and High, and the quote from Kris Deering (reporting on what JVC told him) seemed to imply that the Auto setting is Dynamically assigning the Low, Medium, or High setting, based on the incoming visual signal.

So we seem to be looking at 2 different 'levels' of Dynamic modification of Tone Mapping: there's the frame-by-frame or scene-by-scene mapping, which seems relatively straightforward, but the quote implies that the assignment of Low, Medium, or High is also being dynamically adjusted.

In other words, we have Low, Medium, and High being dynamically assigned, which would seem to provide different parameters to govern the lower level frame-by-frame or scene-by-scene dynamic tone mapping.

Kind of hard to put in words, but hopefully this will clear it up.

I understand what you are asking now. According to Kris in his most recent post on the " other forum ", auto seems to pick medium. I don't think there are two levels of DTM going on.