Originally Posted by mrvideo
It isn't. In this particular reference, the input is already at 120 Hz. The projector, as indicted by the chart, will display it at 120 Hz. It is not the same as taking a TV video signal at 29.97 Hz and refreshing the display at 119.88 Hz (needs to be a multiple of 29.97). Based on the chart, if I am reading it correctly, is that the projector will display all computer video inputs at its native rate. There is no option, that I can find, that tells the projector to refresh the incoming video at 120 Hz.
Of course it works. The projector displays the incoming video at its native refresh rate.
That is what I wrote.
If whatever video resolution you feed the projector fills the screen, and that input resolution is smaller than 1920x1080, then the video was upscaled in the projector. Otherwise a 1280x720, or 1280x800, will be placed in the center of the screen, with black all around it. In the case of 1280x800, it should be upscaled to 1728x1080 with pillar bars on the left and right.
The DMD chips won't be doing any upscaling. There are chipsets that will handle the upscalling. It can also be done in software. A prime example of that is the VLC program that plays videos on your computer screen. It can upscale, or downscale video, totally via software.
And yes, an upscaled video won't look as sharp as a native 1080p/2160p video. A 720p source will look better than an analog video converted to 480i and then upscaled to 1080p. That said, there are damn great 480i/576i 1080p upscalers out there. A prime example of said conversion is the recently released Monty Python's Flying Circus TV series BD release. The original was 625 PAL, digitized to 576i and upconverted to 1080i.
I'm not sure what you're trying to say, it's very convoluted and confusing.
My point was the projector can accept a 1280x800 signal at 120Hz, and display it at 120Hz.
Don't you mean 1280x720p?
When playing a video there will be black bars even if the format is 16:9 since 800 has more lines than 700.
With the the 16:9 video keeping it's ratio/format, not stretched out vertically.
This projector is native 3840x2160/1920x1080. 1280x720 will scale to 1920x1080. The extra 100 lines aren't there in this projector. 1280x800 is 16:10, which this projector is not.
Apples and oranges. The page you reference is the supported input computer resolutions and refresh rates. It has nothing to do with the projector taking the input and refreshing @120 Hz. The 1280x720p TV video will be displayed at 1920x1080 (upconverted).
Selecting 720p from NVCP results in the entire 16:9 screen being filled.
The GPU (in this case) sends the 1280x800 120Hz to the projector which upscales it to 1920x1080 with black bars on the sides, since this is the only way 1280x800 fits into 1920x1080. The refresh rate is 120Hz.
The 120Hz scroll is smooth:
Again the language is very confusing:
It is not the same as taking a TV video signal at 29.97 Hz and refreshing the display at 119.88 Hz (needs to be a multiple of 29.97). Based on the chart, if I am reading it correctly, is that the projector will display all computer video inputs at its native rate. There is no option, that I can find, that tells the projector to refresh the incoming video at 120 Hz.
I never said tells the projector to refresh the incoming video at 120 Hz.
And what does that even mean, interpolation?
If a 29.97fps video is played while the display is at 1280x800 in 120Hz, the same 29.97 frames will be repeated four times each second.
If the frame rate of the video is 23.976 then the same frames will be displayed five times.
If the video's frame rate is not a multiple of 120 it will be fitted as many times as possible, similar a 23.976fps on a 60Hz display (3:2 pulldown).
If a video game is able to run stably at 120Hz then it will be displayed in 120Hz. More and and the display won't accept, less and there will be some repeated frames.
I don't know if you have anything to object here, seems pretty straightforward.