JVC RS4500 (native 4K laser projector)

[mark_h]

When you say 'remeasure' is there a way to do this?  When the video is delayed, can one correct that in a device like a Lumagen (I'm just curious, not about to buy a Lumagen for TV, lol).

Lumagen has no support for lipsync.  I've asked many many times over the years...

I use a Syncheck 3 to measure a/v delay in my system and use my Meridian processor to correct it.

[mark_h]

One interesting thing - it seemed like turning on CMD to high improved audio sync, and it didn't have any affect on the picture ( since it's already shot on video, at least what I watched at the time ).

CMD *adds* a massive a/v delay, so it could be that it's moving it closer to some delay that works in your system.  In mine the delay is so big that I cannot correct it at all.  Fortunately I have no used for the CMD.

[Madfloyd]

My Denon X7200WA has audio delay for each source, so that's how I'm going to do it. Haven't got it totally dialed in yet though. One interesting thing - it seemed like turning on CMD to high improved audio sync, and it didn't have any affect on the picture ( since it's already shot on video, at least what I watched at the time ).

Craig, my issue is that the audio is delayed, not the video.   If it was video, I could fix it in the manner you describe (by adding an audio delay in my pre/pro).  That said, I'll try CMD and see what happens.  I did try DVR'd (recorded) material and while the audio was still off, it wasn't off to the same degree.

[mark_h]

Craig, my issue is that the audio is delayed, not the video.   If it was video, I could fix it in the manner you describe (by adding an audio delay in my pre/pro).  That said, I'll try CMD and see what happens.  I did try DVR'd (recorded) material and while the audio was still off, it wasn't off to the same degree.

Video delay is unusual.  Audio is usually passed much faster.  How are you routing your audio?

Turn on the CMD otherwise - it really slows the video down and may help you out.

[AVSCraig]

Craig, my issue is that the audio is delayed, not the video.   If it was video, I could fix it in the manner you describe (by adding an audio delay in my pre/pro).  That said, I'll try CMD and see what happens.  I did try DVR'd (recorded) material and while the audio was still off, it wasn't off to the same degree.

We just switched yesterday from Dish to U Verse. No change - still has the lip sync issue. Has to be something about the RS4500, since I did not have a lip sync issue with my RS600 ( or any other projector ). I also tried the low lag setting, but CMD high seemed better. DVR'd material doesn't seem to have a lip sync problem here either - very strange !

[AVSMike]

Thanks for the clarification.  Ken didn't measure the contrast and I thought it only improved with the dynamic laser, so I will now assume that with the aperture at -7 (which is where I have it) that the contrast is higher than 8k.

At -7 on the manual iris, you will be getting a lot better than 8,000:1.

[AVSMike]

I see them on black scenes (e.g. fade to blacks).

Do you see this when you feed 1080P content to the projector?

[Madfloyd]

Do you see this when you feed 1080P content to the projector?

Yes.  I think it's also there on 4k content but to be honest I'm not entirely sure since I've mostly been playing my movie server (ripped 2k blurays).  But I don't use the dynamic laser with non-4k content (in case that's where you were going with this).

[Kris Deering]

Just wanted to give a heads up for owners, the Arve tool that JVC owners have been using to generate custom HDR curves for their projectors does work with the 4500. I was able to generate a few curves last night and they loaded just fine. This enabled me to use the projector in mid laser with a great looking image until I figure out how to quiet down the projector in high laser. So if you're itching to get the best HDR performance possible, I'd look into using the tool! There is TONS of information on how to use it over at AVS in the other JVC threads.

[Madfloyd]

Just wanted to give a heads up for owners, the Arve tool that JVC owners have been using to generate custom HDR curves for their projectors does work with the 4500. I was able to generate a few curves last night and they loaded just fine. This enabled me to use the projector in mid laser with a great looking image until I figure out how to quiet down the projector in high laser. So if you're itching to get the best HDR performance possible, I'd look into using the tool! There is TONS of information on how to use it over at AVS in the other JVC threads.

Thanks, that's exciting news!  One quick question before I dive in: is this something that only calibrators can use - or put another way, does it require expensive calibration tools and a steep learning curve?

[Kris Deering]

Thanks, that's exciting news!  One quick question before I dive in: is this something that only calibrators can use - or put another way, does it require expensive calibration tools and a steep learning curve?

No calibration tools required at all, just a laptop that can connect to the projector via Cat5. There is a learning curve, but there are also some quick guides over at AVS that will get you good results with ease. Plus, there is ZERO risk of screwing anything up and when you learn how to use the tool you can just continually change the parameters and dial in the image to your liking. You can save up to three different curves on the projector, but I can create and load one faster than I typed this post, so updates are simple.

[Madfloyd]

No calibration tools required at all, just a laptop that can connect to the projector via Cat5. There is a learning curve, but there are also some quick guides over at AVS that will get you good results with ease. Plus, there is ZERO risk of screwing anything up and when you learn how to use the tool you can just continually change the parameters and dial in the image to your liking. You can save up to three different curves on the projector, but I can create and load one faster than I typed this post, so updates are simple.

Sounds awesome.  Thanks, Kris.

[mark_h]

Just wanted to give a heads up for owners, the Arve tool that JVC owners have been using to generate custom HDR curves for their projectors does work with the 4500. I was able to generate a few curves last night and they loaded just fine. This enabled me to use the projector in mid laser with a great looking image until I figure out how to quiet down the projector in high laser. So if you're itching to get the best HDR performance possible, I'd look into using the tool! There is TONS of information on how to use it over at AVS in the other JVC threads.

This is my backup plan if the Lumagen HDR Intensity Mapping doesn't work as hoped...

[AVSMike]

Yes.  I think it's also there on 4k content but to be honest I'm not entirely sure since I've mostly been playing my movie server (ripped 2k blurays).  But I don't use the dynamic laser with non-4k content (in case that's where you were going with this).

Using dynamic dimming mode 2 and with the latest firmware you should not see any bright corners, because the laser turns completely off on a fade to black with 1080P content. And even with 4K content, it turns almost all the way off. So much so that I can't make hand puppets on my screen, so it should not show bright corners.

[Madfloyd]

Using dynamic dimming mode 2 and with the latest firmware you should not see any bright corners, because the laser turns completely off on a fade to black with 1080P content. And even with 4K content, it turns almost all the way off. So much so that I can't make hand puppets on my screen, so it should not show bright corners.

I rarely use the dynamic laser since it is very distracting and imo needs a lot of improvement.  Of course with 1080p content we now know (courtesy of Kris) that is very problematic.