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Could anyone explain 24hz vs 60hz vs 120hz?

post #1 of 5
Thread Starter 
So my TV is a 60hz TV (UN40EH6030 by Samsung) and I found that it can display 24hz. That is, I can set 24hz on my computer to the TV and play Blu Rays. Now, would it be better to play it at 24hz over 60hz because the 60hz would require 3:2 pulldown and the 24hz wouldn't? I read that this is the reason that 120hz looks superior to 60hz in the case of playing movies from Blu Ray.

In otherwords, does setting my TV to 24hz avoid the need to use 3:2 Pulldown?
Could anyone clarify this?
Edited by awaizy - 3/31/13 at 6:10pm
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post #2 of 5
Hertz is a measurement of frequency, however in display terms it refers to the refresh rate. This is how many frames per second a display can well.... display. A 24hz display can show 24fps. 60hz 60 frames per second. 120hz is 120 frames per second. It shouldn't make a difference in watching movies because most movies are filmed at 24 frames per second.

It will make a difference gaming with twitch type games. I would suggest a display that supports at least 60hz.

Also, WOO pittsburgh ftw. Go pens.
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post #3 of 5
First off, 24hz is 23.96hz, the standard for video recording. 60hz is a simple multiple of 24, and that's what TV is broadcast at. 120hz is a misnomer, as that is interpolation (which produces a shakey affect, like a soap opera) and not truly how the movie looks.

As an aside, 72hz or 96hz are also multiples available on very high end TV's namely plasma's that are THX certified.

If a movie is shot in standard 24p, bumping it to 60hz gives no extra visual information. Bumping that to 120hz or 240hz gives no extra visual information as well. There really is no difference.

Leave it at 60hz for that TV, as that's what is it's standard.
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post #4 of 5
Thread Starter 
Quote:
Originally Posted by salamachaa View Post

Hertz is a measurement of frequency, however in display terms it refers to the refresh rate. This is how many frames per second a display can well.... display. A 24hz display can show 24fps. 60hz 60 frames per second. 120hz is 120 frames per second. It shouldn't make a difference in watching movies because most movies are filmed at 24 frames per second.

It will make a difference gaming with twitch type games. I would suggest a display that supports at least 60hz.

Also, WOO pittsburgh ftw. Go pens.

I understand that movies are shot in 24 frames per second. Now if I set my TV to 60hz, then it can display 60 frames per second. However, 24fps is not divisible into 60 evenly, so it does some 3:2 pulldown algorithm which may introduce artifacts. Does setting the TV itself to 24 hz eliminate the need for the pulldown algorithm?

And yeah, it's a pretty good time to be a Pens fan, except I heard that Crosby just suffered a major injury.
Quote:
Originally Posted by Phil~ View Post

First off, 24hz is 23.96hz, the standard for video recording. 60hz is a simple multiple of 24, and that's what TV is broadcast at. 120hz is a misnomer, as that is interpolation (which produces a shakey affect, like a soap opera) and not truly how the movie looks.

As an aside, 72hz or 96hz are also multiples available on very high end TV's namely plasma's that are THX certified.

If a movie is shot in standard 24p, bumping it to 60hz gives no extra visual information. Bumping that to 120hz or 240hz gives no extra visual information as well. There really is no difference.

Leave it at 60hz for that TV, as that's what is it's standard.


60hz is not a simple multiple of 24, which is why they have that 3:2 pulldown.

Now, I've crawled the internet a little further and apparently one problem with 24hz on the TV is that it can introduce flicker. I'm watching a Bluray right now (My TV info says 1080p/24p) at 24hz and I don't see flicker, but of course my experience of using the computer on the desktop is noticeably more jittery. It seems smooth when playing the movie, though.
Edited by awaizy - 3/31/13 at 6:44pm
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post #5 of 5
The info is displaying your resolution on your source on Samsung TV's, not what it is running at. It is running at 60hz NTSC

Run a DVD or 720p file, you will see that displayed.
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