Originally Posted by aeneas01
I'm hoping that someone can explain exactly how the 6050ub handles 4k (3840 x 2160) video files given the pj's 1920 x 1080 (1920 x 1080 x 2) native resolution? the pj can of course accept 3840 x 2160 signals but what does it do with that signal? downscale it to 1920 x 1080 so that it can apply its 4k enhancement? thanks!
Is uses the full 3840 x 2160 (8M pixels) worth of information to choose the best colors to render each of the two shifted 1920 x 1080 frames (4M pixels) on the screen. It does NOT first downscale to 2M pixels and then upscale (with 4k enhancement) to 4M pixels. You'll notice that "4k Enhancement" is only active and available to be turned on if you feed it a 1080p signal. If you feed it a 4k signal the option is off and disabled.
If the source is a true 4k (not upscaled source like a lot of movies with special effects that themselves are only mastered at 2-4M pixels and then upscaled since true 8M pixel CGI is far too expensive yet) then you'll notice an improvement in apparent sharpness of the image vs downscaling it first to 1920 x 1080 outside of the projector and letting the projector's 4k enhancement fill in (i.e. "guess") 4M pixels from only 2M source pixels. So, the more source pixels you send to it the better the picture can be. You may not notice a difference from your viewing distance, and depending on the source there may also be very little difference in picture. But in theory, feeding it a full real 8M pixels worth of information from a source that has never been upscaled should give the projector more / better information to work with and produce a better image.
If you watch a lot of movies with special effects, there will be very little to no difference in picture between a true 4k display (8M pixel display) and an Epson pixel shifter (4M pixels) because the source is likely only a 2M or 4M pixels source post-CGI and then upscaled to 4k / 8M pixels on the media you have (or in the data file you are streaming from).
Finally, most of what you use to determine picture quality has little to do with the amount of pixels on the screen though (the resolution). The camera itself, the color space (SDR / REC.709 vs HDR / BT.2020), focus and aperture settings of the original camera, contrast and black levels, colors and color accuracy, greyscale and greyscale accuracy, and brightness (and especially brightness), as well as any image processing that went into the source and that are processed by the equipment in your signal path all have a much higher impact on perceived picture quality than resolution.
Hope that helps.
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Last edited by jch2; Yesterday at 10:29 PM.