| V-r0cK said: Hey all, im sure alot of you are gaming on HDTVs and im currently looking for a +50" HDTV mainly for gaming. Im wondering if there's a big difference gaming on a 240Hz over a 120Hz, and whether its worth the extra money to cough up for the 240Hz? Some HDTVs i've seen of the same brand, same size, the price jump of 120Hz to 240Hz can be up to an extra $1000. I've only played on a 60Hz HDTV before and not sure if it was judder that i saw or online lag lol. Thanks in advance. |
See: en.wikipedia.org/wiki/Telecine#Telecine_judder It applies to interlaced stuff but gives you an idea of why they are pushing for 120Hz/240Hz TVs.
Most movies are 24FPS so a 240Hz TV can display the same image 10 times 24x10=240Hz so no judder.
A 60Hz TV must display some of the images twice and others only once as 60/24=2.5 which is not a round number, which creates judder as you see some frames for twice as long as others.
This is why they sell 120/240Hz TV's, because as said above they can display movies with no judder as they don't need to repeat images a varying number of time or to blend them together but repeat each image 5 or 10 times.
More modern TV create intermediate images blending two frames instead of repeating a frame twice. This is not to reduce judder due to frequency mismatch but to reduce judder due to the low frequency of the original material (see here for more info: www.projectorcentral.com/judder_24p.htm).
As you might have noticed it has nothing to do with games.
These TV's AFAIK cannot receive a 240Hz signal. They just process the signal internally at that frequency. You could see this as upscaling the signal except instead of doing it spacially (from SD to HD) they do it temporally (in time, upscaling from 24 frames/seconds to 240 frames/seconds).
Furthermore, as others have noted, many TV's have game mode that disable these kind of processing needed to make movies better looking as they take time to be applied which increase the amount of time between when the TV receives the frame on its input and when it is displayed on the screen. If that time is too high you can notice it (google input lag), though how much lag is too much depends with people.
If you are going to watch a lot of movies on that TV then a 120/240Hz one might be worth it.
If you are going to play mostly games with the odd movie then it would be a waste of money.
As for the judder that you saw in game what were the conditions (hardware, resolution...)? As the only way I can imagine a game looking like it is "juddering" would be if has a serious frame drop so that each frame stays on screen too long. A bit like blinking very fast and continuously while moving/turning your head so you miss some of the "frames" instead of having a continuous vision.
With internet lag you would not have the whole screen juddering but you would see your opponents making quantum leaps (i.e. at one place in one frame and at another place much further the next frame without going through the intervening space) as their position is not refreshed at a high enough frequency due to the lag.
Hope this helps
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