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This is a common misconception caused by the "a 120Hz LCD is cool because it can really display 24p because 120 is a multiple of 24" you read on the net. This is a result of markeing trying to sell complicated things to Average Joe without really understanding them. This is how the LCD TV refresh rate myth was born.

Once they sold 24p to customers they focussed on the natural 24p judder and introduced frame interpolation. What do they use again to market it? Yep, higher refresh. And because the frame interpolation implementation was subpar before, it's now 240Hz they sell as "better". And yes, the panel itself still is a 5ms panel.

24fps always has some judder (not the same as NTSC judder though), because there is only that frames to display. But it's not really judder, it's just that fast movement looks jumpy but it's always constant.

Usually people see this because they are not used to watching something on a "non-flickering" display. On a CRT between the frames the brain interpolates stuff. This is why CRTs appear to be smoother in fast movement scenes. In digitial cinema projection they instert black frames between the real frames to simulate classic projection technique. Various manufactures have introduced similar stuff so simulate a more CRT like presentation but they don't really work well.

Current frame interpolation usually introduces motion artificats and sometimes can't handle a scene well and make it look jumpy like you play a few frames at two times the speed.

But the worst thing is when dealing with close up of people. Erradic movement like eye movement, blinking just feels wrong. It's hard to explain but if you analyze frame by frame you see why. It's casued by motion artifacts. Our brain is very good when dealing with facial expressions. This is why the motion artificats really ruin things here.

Frame interpolation looks awesome on some slower landscape pans though. It works great with sports as well.

<blockquote data-quote="Scythe42" data-source="post: 490878" data-attributes="member: 95833">This is a common misconception caused by the &quot;a 120Hz LCD is cool because it can really display 24p because 120 is a multiple of 24&quot; you read on the net. This is a result of markeing trying to sell complicated things to Average Joe without really understanding them. This is how the LCD TV refresh rate myth was born.Once they sold 24p to customers they focussed on the natural 24p judder and introduced frame interpolation. What do they use again to market it? Yep, higher refresh. And because the frame interpolation implementation was subpar before, it's now 240Hz they sell as &quot;better&quot;. And yes, the panel itself still is a 5ms panel.24fps always has some judder (not the same as NTSC judder though), because there is only that frames to display. But it's not really judder, it's just that fast movement looks jumpy but it's always constant. Usually people see this because they are not used to watching something on a &quot;non-flickering&quot; display. On a CRT between the frames the brain interpolates stuff. This is why CRTs appear to be smoother in fast movement scenes. In digitial cinema projection they instert black frames between the real frames to simulate classic projection technique. Various manufactures have introduced similar stuff so simulate a more CRT like presentation but they don't really work well.Current frame interpolation usually introduces motion artificats and sometimes can't handle a scene well and make it look jumpy like you play a&nbsp; few frames at two times the speed. But the worst thing is when dealing with close up of people. Erradic movement like eye movement, blinking just feels wrong. It's hard to explain but if you analyze frame by frame you see why. It's casued by motion artifacts. Our brain is very good when dealing with facial expressions. This is why the motion artificats really ruin things here. Frame interpolation looks awesome on some slower landscape pans though. It works great with sports as well.</blockquote>

[QUOTE="Scythe42, post: 490878, member: 95833"] This is a common misconception caused by the "a 120Hz LCD is cool because it can really display 24p because 120 is a multiple of 24" you read on the net. This is a result of markeing trying to sell complicated things to Average Joe without really understanding them. This is how the LCD TV refresh rate myth was born. Once they sold 24p to customers they focussed on the natural 24p judder and introduced frame interpolation. What do they use again to market it? Yep, higher refresh. And because the frame interpolation implementation was subpar before, it's now 240Hz they sell as "better". And yes, the panel itself still is a 5ms panel. 24fps always has some judder (not the same as NTSC judder though), because there is only that frames to display. But it's not really judder, it's just that fast movement looks jumpy but it's always constant. Usually people see this because they are not used to watching something on a "non-flickering" display. On a CRT between the frames the brain interpolates stuff. This is why CRTs appear to be smoother in fast movement scenes. In digitial cinema projection they instert black frames between the real frames to simulate classic projection technique. Various manufactures have introduced similar stuff so simulate a more CRT like presentation but they don't really work well. Current frame interpolation usually introduces motion artificats and sometimes can't handle a scene well and make it look jumpy like you play a few frames at two times the speed. But the worst thing is when dealing with close up of people. Erradic movement like eye movement, blinking just feels wrong. It's hard to explain but if you analyze frame by frame you see why. It's casued by motion artifacts. Our brain is very good when dealing with facial expressions. This is why the motion artificats really ruin things here. Frame interpolation looks awesome on some slower landscape pans though. It works great with sports as well. [/QUOTE]