Originally Posted by shawnb44
Originally Posted by tgm1024
I don't understand. Please rephrase. The issue with 120hz and frame dropping has to do with being driven from a source with a 120hz signal (which it will take but discard frames on output). The 120Hz you see quoted about most commonly has to do with taking a 24, 30, or 60 Hz input and interpolating out to 120Hz. Different issue. I'll go deeper into this for you, but I'm not sure I understand the question yet.
if i were to plug my computer into this tv, will the tv change from 120hz to 60hz or can it be set to 120hz? i'm looking for a 120hz set that will work with a computer, so that 1080/24p will play properly. With a 60hz television it cant properly display 24 frames for blu ray correct meaning, it will cause judder?
Ah....now I see what you're worried about. A form of progressive telecine judder and pulldown.
For this discussion, since we're talking about progressive only, I'll interchange "fps" with "hz" based upon what folks are most used to for the number.
Ok. Starting with the first question and marching forward: If you plug your computer into your TV, the TV will auto sense 120Hz input (as far as we know for 1080p and 720p, but possibly other resolutions), but for 1080 it'll not display those 120 frames a second because it'll start dropping some of those frames before displaying. This has nothing to do with what the TV is attempting to do for interpolating. It could well be attempting interpolation on the way out.
First know that for a blu-ray player playing a 1080p/24 BD, this TV does understand how to receive 1080p24 directly. It'll adjust when it sees it if that's what the BDB is sending it.
For a media PC running a blu-ray movie, it would depend if the drivers of that PC & video card support sending 24fps natively to the TV. This I don't know, and you should ask in one of the HTPC forums. IF your PC were to maintain a 120Hz signal to the TV regardless of what the blu-ray is playing, then the PC (or driver or card) would be doing 5x frame duplication and sending those out (technically called a "progressive 5:5 pulldown"). You're gaining nothing there. Especially since the TV will receive the frames and toss some out (I don't know what the drop rate is) before displaying.
If your media PC running a blu-ray movie is running hardware that can only output 60hz (either from the drive or the video card or crappy drivers), I have no idea what it'll decide to do. For this TV, you'd ideally want a 24fps movie to be sent as 24fps to the TV.
Hope that wasn't too much. Long and short of it is you don't want to connect your PC via 120Hz to your TV to watch a movie if there's a way to avoid it PC side.