Originally Posted by blee0120
Wouldn't you need 4k panels for all the things you talked about? It would be good if 2k panels could give us those things and would cost less. If the 4k inputs are just going to downconvert back to 2k, why not just continue with eshift. If the new hdmi is going to work with 2k panels, why add a 4k input?
The new HDMI standard will bring support for new modes which need higher bandwidth (for example 3D 4K at 48fps, or 3D 2K at 60fps), with HDMI 1.4 3D is limited to 24fps (except for 720p60). The new bluray 4K standard will need the new HDMI input, and hopefully will bring better color resolution than YCbCr420 encoding.
An eshift projector with 4K inputs will have to conform with the new HDMI interface in order to be compatible with future 4K sources (including the upcoming bluray 4K, or an HTPC/server with a compatible graphics card), which means the PJ will get internally the full native 4K picture. It will then use e-shift to display half (or a quarter) of the information in one 1080p frame, and another half (or quarter) in another frame shifted diagonally, but the idea would be that there is no upscaling/downscaling involved, only a temporal splitting of the information to display (a bit like an interlaced display, except with eshift you get an increase in resolution compared to 2K, just not the same as true 4K, only half).
The example given between 5.1 and stereo is wrong. To keep the analogy, eshift doesn't convert 5.1 to stereo. It converts stereo to virtual surround (it extrapolates info which isn't there to simulate virtual additional channels). Eshift with 4K input would convert 5.1 to virtual surround (convert real information to virtual channels, so no guesswork involved and clear improvement in accuracy), and true 4K would play native 5.1 (play real information to discrete channels, obviously the best solution but at a cost). This is why we can expect an increase in quality with e-shift with 4K inputs, as the information is real, not interpolated. And this is only taking horizontal/vertical resolution into account, not improved color resolution with less banding etc (ie how many discrete colors can be saved for each pixel in the 4K picture).
At the moment, the JVCs with eshift take a 1080p picture, upscale it to 4K (so invent information that isn't there with extrapolation) and then display two halves of the picture shifted diagonally. Highjinx has already - and correctly - explained the e-shift process.
A JVC with 4K inputs means that you don't do the upscaling (you don't invent information which isn't there), you take the native 4K picture with all the information and apply the eshift process to display it using 2K panels/optics. But at no time is the picture downscaled again.
Benefits are 1) no upscaling (or downscaling, you need to learn more about how eshift works if this is still unclear to you, it definitely doesn't downscale a 4K picture to 1080p, only displays part of it at any given time, say only even lines or something like that) which is very different; and 2) whichever benefits come with HDMI 1.5/2.0 and bluray 4K (like higher frame rates, increased color resolution etc) will still be fully there in the eshifted picture.Edited by Manni01 - 2/3/13 at 4:32am