Originally Posted by R Harkness
I have the RS57 coming, which as we know accepts a 4K signal input. I also have the Lumagen 2041 video processor which can upscale 1080p to output
it as 4K. Of course I plan to try using the Lumagen to upscale to 4K to the projector, to see if there are any advantages to bypassing the internal 4K scaling of the JVC.
But some if the discussion in the Sony VW1000 thread about sending it 4K and the sony Reality Creation controls have me pondering the same situaiton wiht the
new JVC projectors. Sony's Reality Creation being the Sony version of JVC's MPC processing, used to add fine contrast/sharpness to the picture.
It seems with the Sony there are advantages in using the Lumagen to scale for a smoother image with less ringing. But then, also, it seems
to change the function of the Reality Creation controls. If not exactly de-activating the RC, at least making it much more subtle.
It's hard to predict the consequences of sending the JVC an upscaled 4K image. I'm wondering if any of the MPC picture processing controls will alter, or perhaps
become unavailable. The problem is JVC sends a very confused message as to what it is describing under the broad label "MPC." The JVC literature tends to refer
to talk about BOTH "upconversion/upscaling" AND additional image contrast/sharpness enhancement under the label "MPC." E.g. in such slides as these:
You can see in the description of the New Auto Mode MPC slide, followed by the slide depicting how the new MPC auto mode employs the "best upconvert automatically" how they have
smushed the two things together. Of course EVERY pixel is going to be upconverted, it has to be. What they mean by "best upconvert" seems instead to be "best, most intelligent application of the MPC fine contrast/detail enhancement process" that has been done by manual sliders until now.
But at it's core, from my understanding, upconversion is just the re-scaling of a lower pixel count source to a higher pixel count display. While some judicious
level of sharpening may be used in some upscaling processes, generally speaking, upscaling itself is not a sharpness/detail/contrast control, but has the job of
re-scaling the image.
On my RS55 this separation of duties can be seen in that I can turn E-shift on and off - on being the simple upscaling of the 1080p image to pseudo-4K and then optically shifted. Whereas engaging the "MPC" control afterward then begins to add fine contrast/sharpening to the image. But in the JVC literature it tends to refer to BOTH the upscaling process AND the additional
controls for adding fine contrast as "MPC" and call "MPC" "upconversion." Which is technically confusing.
I have a feeling JVC is using a sort of loose meaning of "upconversion" in that the public, back when there was the upscaling/upconversion DVD players to HD display furor going on, tended to be sold as "making SD look more like HD on your HD display." So "upconversion" in still being used as a catch-all phrase to include "making the lower resolution source look higher resolution, on your higher resolution display.
" Personally, I just wish JVC would be more careful in it's descriptions. For one thing, as I started off saying, since JVC places all sorts of processes under the banner "MPC" including upconversion, it leaves me wondering how JVC has actually conected those processes in it's projector. I would think that I could send the JVC
a 4K signal and there would still be MPC controls for adding the fine contrast/detail enhancement, just as if I had let the JVC itself upscale to 4K first. But...who knows? Maybe the MPC controls have been linked to the JVC doing the upscaling. Maybe the new auto mode will be unavailable when the JVC sees a 4K input signal, or maybe all the MPC image enhancement settings won't work. As far as I know, JVC hasn't said anything about what image enhancement features (MPC) will work with 4K signals or not.
Any predictions? (Or corrections to my understanding of the above...)