Hz televisions

[fredreed]

What is the difference between 60hz, 120 hz,240hz,and 600hz? I mean how are they when playing back movies on blu-ray or watching regular cable on them.

[MOVIEGEEK]

http://reviews.cnet.com/240hz-lcd-tvs-what-you-need-to-know/

http://www.pcmag.com/article2/0,2817,2379206,00.asp

http://lcdtvbuyingguide.com/lcdtv/120hz-240hz-60hz.html

Some people like the difference between 60 Hz and 240 Hz on LCD but the 600Hz is for plasma screens, both of my HDTV's are 60 Hz and they look fine for sports and Blu-Ray.

[jagabo]

Basic TV runs at 60 Hz. Film sources are 24 fps so to make 60 Hz they repeat frames 2 or 3 times each (ie 2/60 second or 3/60 second), alternating between the two (on average 2.5 times, 24 * 2.5 = 60). That unequal display time of frames creates a noticeable judder on top of the inherent jerkiness of 24 fps film.

120 and 240 Hz TVs can duplicate film frame 5 times (5 * 24 = 120) or 10 times (10 * 24 = 240) each to eliminate the judder. But that leaves you with with jerkiness of film. So in addition, they interpolate motion to create in-between frames. For example, you can generate one frame between each of the 24 fps film frames to make 48 different frames every second. A 240 Hz TV can then display those frames 5 times each (5 * 48 = 240). The end result is much smoother motion.

Film purists don't like those smooth motions. They feel it takes away from the surrealness of film. In addition, the techniques used to generate those in-between frames can lead to weird artifacts in some situations. See the videos the following posts to see some of the artifacts:

https://forum.videohelp.com/threads/339017-Motion-Interpolation-%28VidFIRE%29-Software?...=1#post2107214
https://forum.videohelp.com/threads/305001-Current-HD-standard-is-a-FAIL?p=1872955&view...=1#post1872955

Those were generated with software that works like that in 120/240 Hz TVs.

[jman98]

Basic TV runs at 60 Hz. Film sources are 24 fps so to make 60 Hz they repeat frames 2 or 3 times each (ie 2/60 second or 3/60 second), alternating between the two (on average 2.5 times, 24 * 2.5 = 60). That unequal display time of frames creates a noticeable judder on top of the inherent jerkiness of 24 fps film.

While this is certainly correct, I would argue that many people will actually not notice it or won't care about it.

Basically every different Hz TV has people who love it and people who hate it. I've read reviews from people who like 120 Hz TVs and hate 240. I've read reviews from the exact opposite. It's foolish for us to even guess what your personal preference will be so you would be well served now that you have an explanation for what it means to go somewhere and look at different TVs with different refresh rates and see what you think. It wouldn't surprise me if you don't see a big difference between any of them. What we really want to avoid here is a situation where you buy something blind and then hate it, so definitely check out what you are going to buy before you make the purchase.

[jagabo]

Basic TV runs at 60 Hz. Film sources are 24 fps so to make 60 Hz they repeat frames 2 or 3 times each (ie 2/60 second or 3/60 second), alternating between the two (on average 2.5 times, 24 * 2.5 = 60). That unequal display time of frames creates a noticeable judder on top of the inherent jerkiness of 24 fps film.

While this is certainly correct, I would argue that many people will actually not notice it or won't care about it.

They may not care, and may not have noticed before, but everyone I've pointed it out to can see the jerks/flicker of 24 fps film, even 30 fps progressive video. With the right kind of shot it's very obvious.

[montevo]

ı have a 100 hz lcd tv.it only makes 25 fps input to 50 fps.what comes in goes double times.i like this.but ı hate lcd tv companies.they are all liers.they give you just a big panel.and nothing more.ı use my pc on lcd tv.lcd tv cannot proccess at time.this is input lag.they use low speed processers.maybe 3000-5000 dollars tvs do not have input lag.but there is no reasonto give a tv about 4000 dollars