Originally Posted by cansari
So even though the RS400 is a native 1080p projector, the image quality of a 4k source is superior to a 1080p source? The 4k source quality does not get downgraded to 1080p quality?
Yes it will be a bit lower comparing to native 4K signal processing through 4k panel.
Its all about inbuilt panels, there are 2 1080p Panels which produce signal at the same time in 1080p and by eshifting technology it doubles the precision. So when feeding UHD signal, the reason I'm saying UHD signal is because its different to native 4K signal which is 4096x2160, this projector will crop signal on both ends and will output UHD 4k signal which is 3840x2160p and Video Industry now identifies full spec native 4k as 3840x2160p which is Ultra HD and will be the standard format for 4K resolution.
When it comes to down sampling the signal it always loosing portion in information just from the math law of Fourier transform, this algorithm is the basic of sampling signal and resampling.
The other reasonable question will you differ those changes, as algorithms are quite complex and well performed this etechnology 4 is showing very good results how it can increase performance from 1080p panels. A lot people might say well 4k native is always better comparing to any resampling - and theoretically the answer will be yes, however practically you won't notice a difference from 2-4 meters of your viewing distance.
The major improvement in this new lineup comparing to previous year it now supports 60 and 50 HZ of UHD 4K 3840x2160p, it still supports only 24 HZ when feeding NATIVE 4K 4096x2160p. Also power output of lamps is now increased to 1700 lumens comparing to 1300 lumens, but native contrast slightly dropped to 40,000:1 comparing to 60,000:1. It is very difficult to discuss and argue, until you see it with your eyes
so get to demo room or if someone have it and can invite you to watch it, have it a go and decide whether you want it or not, so far its one of the best projectors from High-End Market in our days, and JVC always stands for very rich colors, contrast and deep blackness.
As already mentioned UHD will be the new standard of highest quality to be sold, despite the fact that film makers shoot movies even in QUHD (full spec 8k) and 4K, TV giants and manufactures are not ready on serving this content via real 4K 4096x2160p, instead all content will be served as UHD and a lot TV companies call it just 4k or 4k UHD. New blu-ray will be UHD resolution not real 4k, so you really have to take this in count when comparing projectors with 4K panels and 1080p panels.