"fake" 120hz LCDs/TVs

I got a 42inch LG tv with a "TruMotion" 120hz technology which simply re-applies fps and overlaps them to make things look more fluid.

This is already old tech, I know, but I was wondering... why hasn't this techonolgy been used on GPUs? (as far as I know, maybe they are using it heh). The thing is... it is a very simple and cheap way to increase fps and fluidity. Sure it may not always work well but when it does, it boosts some games from the 30fps area to a smoother near 60fps level.

After reading about this motion interpolation, I can see why it wouldn't benefit most movies, but most games might get a decent bump in fluidity.

 

Anyway, some games do something similar with "motion blur". It makes framerates appear smoother than they actually are. It's particularly obvious in Crysis.

 

Motion interpolation takes two frames of animation and generates an 'in between' frame (similar to morphing two images).

The reason it isn't used for gaming should be blatantly obvious. You can't create an 'in between' frame in real time, you have to wait until the both frames have been rendered, and by then, you are too late, the frames have already happened and if you delay displaying them to create an interpolation it just lags the action even further.

 

Thanks. Yeah motion blur does help when running low fps and it did help me enjoy crysis at a bit higher settings that I could run because of it. This thing is similar to motion blur I guess, but less refined and simple. Actually, when a game has motion blur and you put this fps tech on, it looks weird yet fluid sometimes.

EDIT: Oh, I found this is called anti judder too, besides motion interpolation as V_C noted. "Also, anti judder technology is not the same as motion blur reducing technology, but is frequently lumped together with it." from wikipedia.

 

Interesting. I haven't noticed any lag generated by using this feature on yet. But I don't think its effect is as sever as it sounds because my creating additional frames and displaying in them at the same period of time does not cause lag, since the same 2 seconds happened, but more frames were displayed, thus it helps give a bit more smooth image. It simply is a fake smoothing but it does help sometimes (some games don't benefit, at all...).

But as I mentioned, in movies it sucks because instead of seeing the 24fps, you get 48fps and it just breaks the cinematic feel of the movie, and looks more like a documentary film.

Anyways you are right. Specially games that already run fluid enough, they will get additional lag. I found the following:

"but due to gamers' sensitivity to lag even in the 200ms range, it is often better to turn off all video enhancement effects for video game" which makes sense probably for games that require too much precision.