EDID thread (RTD1619BPD players)

Nearly:

Load a 400nit LLDV EDID from the first page which then gives an LLDV option in HDR settings.



Select that and set the PJ into its HDR mode.

What you're missing with the Vertex is the ability to send an HDR message with MaxCLL at 400nits when it receives LLDV which makes the whole thing seamless if you want to set HDR to Auto.

But as I say, try wit without and also compare the 400nit EDID to a 1000nit one.

Up to you how you handle processing in the Sony - I have a JVC and I send a 1000nit LLDV signal and use Frame by Frame DTM in the JVC. I don't think the Sony does true dynamic tone mapping, but experimentation and understanding what's going on is the key to all this.

 

Understood, time to experiment, just like audio there is no "one size fits all" setting.

Are there a few good movie scenes to "stress test" the configuration(s) which could be recommended and what to look for?

 

No, definitely no "one size fits all" which is also true of HDR in general.

Best advice is to use movies you know well.

 

Hello, since I have a HDFury Arcana, should I disable custom edid?

He are my Ziddo

Display/Color Settings/4K 50~60Hz: Priority YUV420 10BIT
Display/Color Settings/4K 23~30Hz: Priority YUV444 10BIT
Display/Color Settings/Non-4K: Priority YUV444 8BIT
Display/Color Settings/HDMI color range: 16-235
Display/Color Settings/Deep Colour compatibility mode: Turn Off
Display/Color Settings/HDMI Signal format: Enhanced format

Custom EDID:OFF
HDR Mode: LLDV
LLDV Player

HDFury Arcana:
Scale: 4k 444 8b LLDV
HDR: Auto
LLDV>HDR: On | Min Luminance: 0 | Max Luminance: 350

I don't know what I'm doing wrong but no matter what options I change on HDFury, the picture doesnt change.
Do I have to restart the zidoo everytime I change settings on Arcana?

 

I would probably use the Arcana rather than the Zidoo for the custom EDID.

No, you don't need to restart the Zidoo, but you probably need to close and re-open the settings app to refresh it when you make changes, depending on what you change.

 

Hello Mark,

I did receive my Z30 Pro 8k and trying to setup with my JVX DLA 7900.
I'm currently using the process described in your PDF "Setting up Zidoo boxes for LLDV on JVC Projectors without an HDFury device" , with your custom gamma curve file, many thanks for that.
Wich EDID would you recommend (my screen size is relatively small 2.4m, and I have quite a good level of luminance in the room, which is light controlled with black velvet surfaces everywhere). Is there any other one then 400 and 1000 nits (maybe 600 or 800 to test ?). Also, should I activate the VS10 engine ?

Also, what did you meant in your post "using frame by frame DTM in the JVC"

Thanks a lot for all your dedicated work here.

 

I would try the 400nit one first.

There is a 100 - 10,000 collection in the first post.

The newer JVC projectors support frame by frame dynamic tone mapping. I think it started on the NX range.

 

ah ok so not for mine then. I'll try the other EDID.
And what about VS10, should it be activated together with LLDV ?
Thanks again

 

You don't activate VS10 as such on the BPD models, just pick the HDR mode you want - in this case LLDV.

 

Thank you Mark.
So I'm converting everything to LLDV on my DLA7900 with your custom gamma curve, picture is really great.
One last thing I would like to optimize : my blacks are a little bit crushed sometimes, I'm loosing a few details in dark scenes, so wanted to ask you if the custom gamma curve can be edited with the JVC tool (or via the PJ) ? Or maybe there's other gamma curves to test I can load ?

 

PQ Gamma necessarily comes out of black quite slowly compared to Power Gamma.

I created it using Microsoft Excel and experimenting for months (maybe years!) in the early days of these projectors trying to maximise brightness without blooming and retaining tone mapping at the top end. The gamma file is a simple text file with output values for different percentage input values and the scale isn't linear.

If you open the file in a text editor you'll 3 lots of values, one each for RGB and these relate to the input stimuli - although it's not a linear scale.

0 is set at 0% stimulus and 1023 is set at 100% stimulus and you graph the values in between according to a PQ gamma curve but you have to steepen the curve more than a standard PQ curve because you need to roll off at the top to tone map.

The input vs output stimuli for that curve are shown here:

​

If you graph it, you can play with the figures so you could come out of black at a different rate:

​

 

Very interesting thank you.
I would say that the gain in overall picture quality with your LLDV process and the actual gamma curve is so interesting, that I could live with this little lost of some details in black scenes.
Maybe I can also simply play with the contrast parameter in the JVC... I don't think I will edit your file in xls, seems a bit to complex for me

Do you think another EDID could help also (currently using the 400 nits from the Zidoo list) ?

 

It's worth trying others, but in my experience, on my setup, 400nits was the sweet spot.

 

Hello,

I have an Epson 9300 projector. Which edid do you think is more compliant in order to convert HDR to SDR successfully with correct colors and brightness?

 

?? Why not simply use the VS10 to SDR EDID and call it a day?

 

EDID is irrelevant for HDR to SDR conversion.

 

Thank you for the update. I currently own the z9s which is not converting correctly hdr to sdr that's why I'm thinking to upgrade to z9x pro.
I thought EDID was about converting hdr to sdr.

 

No, it specifies the audio and video capabilities of the display and/or amp/receiver etc so the source knows what it can and can’t spit out.

 

Based on your experience what is the correct unit in order to convert correctly hdr to sdr? Z9x? Z20? Z30? etc

 

If I were you.. I would look for one of the devices in this thread's product line ..... using the 1919bpd chipset (Z9x Pro.. etc.. ) . Then select the HDR output option of VS10 engine output to SDR ... works great for projectors such as your Epson.