Judder created by 24 frames per second video (also called 24p) makes camera movement look stuttered, and is especially noticeable with panning shots. It is a result of a mismatch between the refresh rate of a TV panel and the frequency of 24 hz video, and can occur both over a 24p signal and when a 24p video is sent via a 60p or 60i signal.
Luckily, some TVs are able to adjust themselves and play 24p movies judder-free. A few can also remove judder from 24p video sent via 60p and 60i signals. As part of our testing process, we check whether every TV can do judder-free 24p, and also judder-free 24p via 60p/60i.
When it matters
24p judder only matters when you watch movies, so if you don’t watch movies, you have nothing to worry about.
Overall, 24p judder is not a major problem; most people will never even notice it. If you’re wondering whether it’s an issue for you, take a look at this video and compare the look of 24p with judder (left) to judder-free 24p (right). If you don’t notice the judder on the left, or it doesn’t bother you, there’s no need to worry about getting a TV that can do judder-free 24p. If you do notice it and it bothers you, make a point of getting a TV that can.
What it is:
Judder-free movies over 24p signal.
When it matters:
Blu-ray and DVD movies; 24 hz PC signal.
This evaluation verifies whether a TV has judder on 24p videos sent via a 24 hz signal. This will tell you whether a DVD or Blu-ray player or a TV’s native streaming services, will have judder when playing movies. If you’re a big movie buff and use one of those mediums to watch movies, this test is somewhat important (more important if you’re bothered by 24p judder).
To conduct the test, we play a 24 fps video on the TV (download it here), sent from our PC over HDMI. The test video cycles a white square through 24 slots in one second. While it plays, we photograph the screen, using a 1-second exposure.
Pass (No judder)
To pass this judder-free 24p test, a TV must be able to recognize that a 24 fps video is playing and adjust its refresh rate so that the video is played at 24 frames per second. If the color of the squares is a uniform grayish color, it means each of the 24 slots displayed the square for the same amount of time, and so the TV has passed the test (above, left). If certain squares are light, and others are dark, it means the TV failed to play each frame for an even amount of time, and therefore had judder (above, right).
Judder-free 24p via 60p
What it is:
Judder-free movies over 60p signal.
When it matters:
Movies from streaming devices (Apple TV, Fire TV, etc.); 60 hz PC signal.
This test is to determine whether a TV has judder on 24p videos sent via a 60p signal. This will tell you whether movies played over a 60p signal (streaming devices, game consoles, etc) will have judder. If you hate judder and watch movies over one of those devices, you should get a TV that passes this test.
This test uses the same test process used in the judder-free 24p test, but with the 24p video sent over a 60hz progressive (60p) signal. To pass, a TV must be able to recognize that a 24 fps video is playing over a 60p signal, and adjust its refresh rate so that the video is played at 24 frames per second.
Once again, if the color of the squares in the resulting photo is not even, the TV has judder.
Judder-free 24p via 60i
What it is:
Judder-free movies over 60i signal.
When it matters:
Movies from cable/satellite boxes.
We also test whether a TV will have judder when playing a 24p video sent via a 60i signal. This will tell you whether movies played over a 60i signal (mainly cable & satellite boxes) will have judder. If you watch lots of movies through your set-top box and don’t like the look of judder on 24p video, this is an important test for you.
This test uses the same test process used in the judder-free 24p test, but with the 24p video sent over a 60hz interlaced (60i) signal. To pass, a TV must be able to recognize that a 24 fps video is playing over a 60i signal, and adjust its refresh rate so that the video is played at 24 frames per second.
As with the other 24p judder tests, if the color of the squares in the resulting photo is not even, the TV has judder.
The cause of judder on 24p video
TVs commonly have one of two refresh rates: 60 hz and 120 hz. 30 hz and 60 hz videos divide into those refresh rates evenly, which makes it easy for the TV panel to get the video to meet the panel refresh rate. For example, a 30 hz TV show would have each frame displayed four times on a 120 hz panel.
Likewise, most 120 hz panels can display 24 hz video without issue, because 24 goes into 120 five times. But some 60 hz TVs have difficulty. Because 24 does not divide into 60 evenly, doubling the frame rate still leaves 12 frames missing from meeting the TV’s refresh rate. To get to 60 fps, 60 hz TVs use a feature called ‘telecine,’ or 3:2 pulldown. This makes the video’s frames alternate displaying two and three times – hence 3:2 – which makes up the missing frames. The image below illustrates this.
The video lingering on some frames longer than others adds a jerkiness, or judder, to the movement when there is a camera pan. There’s jerkiness to other movements too, but it’s less obvious than what you see with a pan. To get around this, it’s necessary to get a TV with a film mode that reverses the telecine, as that will eliminate judder.
The cause of judder on 24p via 60p/60i video
If you’re watching a movie off of cable, or from a PC, you may see judder even if your TV can play movies from 24 hz sources judder-free.
The problem: the signal being sent from the cable box or PC is likely 60 hz (either 60p or 60i), so even though the movie is 24 hz, your TV is registering a 60 hz signal. This means telecine (3:2 pulldown) is altering the frame rate of the 24 fps video so that it is 60 fps, which could create judder.
How to get the best results
Here are the settings to enable to get judder-free 24p on compatible TVs.
Samsung: Automatic most of the time, but inconsistent – sometimes 24 fps video will have judder via 60p and 60i. For 480i and 1080i video, go to Menu > Picture > Picture Options and set ‘Film Mode’ to ‘On.’
On some TVs, setting 'Auto Motion Plus' to 'Custom' with both sliders to 0 will fix it without adding any soap opera effect.
Sony: Go to Menu > Picture and Display > Picture Adjustments. Set ‘MotionFlow’ to ‘TrueCinema,’ and set ‘Cinemotion’ to ‘High.’
Vizio: Go to Menu > Picture > More Picture and set ‘Film Mode’ to ‘Auto.’
LG: Go to Menu > Picture > Picture Mode Settings and set ‘Real Cinema’ to ‘On.’
Motion interpolation settings can also remove judder from 24p video. Keep in mind that interpolation can sometimes introduce occasional frame skipping to the video, and also adds the soap opera effect. We talk more about motion interpolation here.
When testing for 24p judder, we never use interpolation during these tests. It increases the frame rate, which defeats the point of testing for judder-free playback of 24 fps video.
24p judder makes camera movement in movies look stuttered. It’s not a huge deal for most but could be a pain for people who are sensitive to this kind of issue. We test to see whether a TV has judder on 24p movies sent via a 24p, 60p, and 60i signal, which covers just about any device or service you might use to watch movies.
To avoid 24p judder, get a TV that supports judder-free playback over whatever signal type you normally use to watch movies and then enable any of the necessary settings we outlined above.
Hello Rtings, love your reviews.
I am interested in buying the Samsung JU6500, which according to your reviews doesn't support 24p playback.
Is there anyway to make the problem less noticeable or is there any possibility of a firmware update to alleviate the playback judder?
Unfortunately, there's not really anything to be done about the judder, and the problem isn't really something that can be fixed with a firmware update.
The optimal real refresh rate of an LCD for 24p playback is 120Hz, because 120/24 = 5, a clean cut display without judder. Now if I feed 23.976fps instead, how is that displayed?
I'm in Europe, and refresh rates here aren't multiples of 24 (50,100,200). Is still possible to find a TV that outputs real 24p, and if so, how is it done?
In the majority of cases, 24p actually means 23.976 (or 24/1001 to be exact). A true 24p exists, but very few Blu-rays have that frame rate. The difference, 0.1%, is negligible, so the TV can just speed it up. Yes, it is possible to find a 24p supporting TV in Europe - just look for something called 'Real Cinema', '24p Cinematic Playback', 'Cinema Smooth', '24p True Cinema,' or the like. It is done by changing the refresh rate of the panel to 96Hz, for example.
I have a Vizio E700i-B3, which is a 60Hz set (120Hz effective). You say above that it supports 24p, but I am confused as to how a 60Hz set can handle 24p w/o 3:2 Pulldown. I will be very happy to confirm that it does, but I just don't understand how it can.
TVs don't have a fixed refresh rate anymore. They can alter it exactly to what they want. The 3:2 pulldown is more of a legacy issue. If you want to see all frame rates accepted by your TV, connect it via HDMI to a PC. Your PC will be able to list all combinations of supported resolutions and frame rates.
How does the playback work when a regular computer running Windows outputs a 24p movie to a 60Hz TV via HDMI? How about a computer plays a 24p MKV file? As the Windows system detects the supported refresh rate of the TV - let's say 60Hz - when it's not playing any video, it should output whatever refresh rate is configured, which is 60Hz in this case (assuming it's set to max). Now will there be any "judder" if the computer plays a 24p movie? Will this be the same as outputting a video feed directly from a Blu-ray player?
It does a 3:2 pulldown by default, so yes, there will be judder. The graphics card outputs at a constant 60fps, so even if the computer plays a 24fps file, it needs to match 60fps. An HTPC dedicated OS (like Windows Media Center or XBMC) can get around it by changing the frame rate of the video card to match the media, because they are always full screen. Because Windows has multiple windows, it can't do it. Blu-ray players or a PS4 won't have problems with this. If you want no judder when you are watching a movie, you can change your graphics card's output to 24 fps. You will need to do it manually and remove it each time, though.
I have a 50 Hz TV in the UK. It can support 60 Hz and 50 Hz. How does it process 24p (what is happening) if I enable 24p or Real Cinema mode - which is an option on this TV - and set my source to 24p mode?
Recent TVs can change the panel refresh rate on demand, enabling non-multiple frame rates. The 3:2 pull down problem is mostly a legacy one. In your case, the TV just sends a frame rate of 24 fps to the panel and displays it as is.
Thanks for all the helpful info! I think I have settled on the Vizio M-series 55". I really like watching movies, but now that I learned about 3:2 pulldown from you folks, I notice it all the time (thanks a lot :)). So 24p playback capability is really important.
Even though the set is 60hz, it seems like you are saying that the panel can change the refresh rate for different purposes, so it can achieve true 24p even though it is not 120 or 240hz. Is this correct? I just want to make sure that the set doesn't have to apply something artificial (such as some version of motion interpolation) to achieve 24p at 60hz.
A related question: I know streaming devices such as Apple TV output at 60 hz. Do they also adjust their refresh rate when playing back 24p content, or does it have to use 3:2 pulldown? If Apple TV can't output 24p, is there a setting on the TV (aside from motion interpolation) that corrects this and achieves 24p from these devices? Finally, does this Vizio set automatically play back 24p content from native smart TV apps (like Netflix) at 24p, or would I have to make sure film mode is set to on or auto? Thank you!
Yes, you're correct. The TV has special chips that allow the 60 hz panel to adjust itself and play 24p material without 3:2 pulldown.
Some devices can output proper 24 fps - Xbox and PlayStation are two examples - but Apple TV does not. That said, some TVs, including the M, can detect this and do the reverse 3:2 pulldown.
You'll need to set Film mode to 'Auto' to get the streaming apps to do judder-free 24p.
Hi. I just purchased a Samsung JS9000 and was wondering if the Judder 24p @ 60 hz could be fixed with the OneConnect? Or is the display the limiting factor? And if not, is it bad or noticeable? I plan to connect my laptop to the JS9000 from time to time. Thanks again, Rtings bros.
In terms of immediate adjustments, no, there's little you can do. You can enable 'Auto Motion Plus' to get rid of the judder, but this adds the soap opera effect.
Judder isn't very noticeable, so it's not something to worry about much. Odds are good that it isn't going to bother you.
As for a future solution, it's certainly possible that one could be released with a future OneConnect box, or even potentially with a firmware update. You could also get around the issue by setting your laptop to output a 24 hz signal, which won't have judder.
I have a Samsung un32h5500 60hz set. I notice the cadence of Blu-ray movies output at 24p contains too much of the soap opera effect. Interestingly, if I turn off 24p output on the Blu-ray player (a Panasonic bd85), the soap opera effect seems reduced to me. I would like to know if I upgrade to the Samsung un32h6350 120hz set if you think it would further reduce the soap opera effect I am seeing (provided the auto motion plus is set to off)? Just wondering if the lack of the TV needing to do the 3:2 pulldown with a 120hz panel would promote the more traditional 24p film cadence - and would like to know if you think it's worth it to invest in the 120hz panel.
What you perceive is not the soap opera effect, because your TV doesn't have that feature. Your TV does support 24p without the 3:2 pulldown, so this is what I would guess is what you're calling the soap opera effect. When the TV displays real 24p, the picture does look smoother, but there are no fake added frames. If you don't like that, why not just turning off the 24p output on your Blu-ray player?
how to turn 24p when playing movie from USB on Samsung TVs? On J62 series or JU7 and above. Is there any way to watch movies without judder and without soap opera effect?
Thanks for your review, your site is perfect.
The J62 and JU7 series will automatically handles 24p without judder or soap opera effect (SOE) over USB if the source material is 24p.
I know you guys don't have a crystal ball, but have you heard anything about Samsung stepping up their game in 2016 and offering 4k/HDR TVs that have judder-free 60p/60i? I run everything off of a home theater PC, so this is essential.
That's not something that they advertise, so we'll only know once the 2016 TVs are released and we start testing them. Keep in mind though that Samsung TVs can do judder -free 24p via 60p/60i, but they fail our tests because they don't consistently work.
Hi, I tried to compare some TVs with 24p support to those which don't support it. After disabling all MCFI options (Auto Motion Plus, TruCinema, I don't like SOE and all the downsides that interpolation brings) on 24p supporting TVs I saw the same result as on basic 60hz TVs which aren't able to interpolate 24hz to higher frame rates. I focused on panning shots in movies (23.976fps). Judder seemed just the same to me in both 60hz and 120hz TVs. (e.g., Samsung J55 / J62 with Auto Motion Plus disabled.) Is it possible or am I wrong and something was set incorrect? Playing all over USB.
Thanks for your reviews, much appreciated, great inspiration.
This proves that judder is often hard to detect. On panning shots, the low frame rate will make most of the apparent choppiness. Since judder is more subtle, we always use the camera method described above (taking a 1 second picture of this 24p video). If all 24 squares on the resulting photos are of the same color, that means the moving white square went over each square slots for the same amount of time, resulting in no judder. No matter the settings, the J6300 is always judder free on 24p content. Try the same method as us for your future tests.
Looking at Samsung UN65JU6400; seems all sellers stuck on ~$1298+. Does Samsung control pricing, so that no seller can break ranks and offer this size at discount for Black Friday? Good sales on 60" size, but nothing comparable at 65" - darn.
Yes, Samsung controls pricing of their TVs. This is why the same model drops or increases in price at the same time at all retailers.
During your tests for judder on 24p signals... are you testing in 1080p or 4k? For example I am interested in the KS800D and your tests say judder free but is it judder free at 4k? These TVs claim 120hz but is it 120 in 4k or 60hz? Are we all buying TVs thinking the 120 Hz does anything in 4k I have heard conflicting answers all over the Web on this and was hoping for some help. Other review sites claim the KS8000 is judder free in 1080p for 24p content but not so in 4k content. Any help on this issue would help us all out right now. Thank you so much for creating this site!
Thank you for your feedback. We do our judder tests with 1080p signals. Using 4k signals is a test we can consider adding in the future. A 120Hz display helps because it means a 24p source over a 24Hz signal can be played by repeating 5 frames. For the judder tests of 24p over 60p or 60i, it depends more on the processing of the display (reverse 3:2 pulldown) and not on the refresh rate. The 120Hz is useful for people who like the soap opera effect, and motion interpolation. This is a personal preference.
We have just tested our KS8000 with a 4k signal and found that movies over 24p play smoothly, and movies over 60p play smoothly when 'Auto Motion Plus' is set to 'Custom' and both sliders to 0. The TV does not support a 4k @ 60i signal.
Looking at the Samsung J5000 48", and want to know if it will support 24p. Looking at this TV b/c I don't need any of the fancy smart features - just want high quality 1080p, but the shudder is a concern.
Unfortunately, the J5000 does have judder when playing 24p video.
Can you explain what is meant by "Judder-free 24p via 60p" and how important is this feature? Sony TVs have this feature but most Samsung TVs do not. Is there a way to determine this feature for a TV that is not reviewed on your site? Thank you for providing a great resource!
Sometimes, you might watch a 24 fps movie over a 60 hz signal (watching a movie on TV, or off your PC). Some TVs are able to recognize that this is happening, and will adjust the refresh rate, eliminating judder. It's only important if you dislike judder (take a look at the video here to see if it bothers you) and watch 24 fps movies over a 60 hz connection.
Unless you can find a different reviewer that also tested this, the only way would be to test the TV for yourself. The simplest way would be to connect your PC to the TV, and then play a movie with a panning shot. If you notice a slight jittery look to the pan, you're noticing judder.
I watch a lot of 480p movies from my home server via playstation and lots of Netflix from the native Tv apps. I hate the soap opera effect, so I must be able to remove it. What is your recommendation for a 50" Tv? I was thinking Samsung J6300. Does the judder-free via 60i and 60p apply to SD content from my home server played through the playstation? Or is that only for content played from computers? Thanks!
As with most Samsung TVs, lower resolution content looks good although it is worth noting that at 480p a small portion of the top and bottom of the screen is cropped. The bad news is that other brands of that size aren't that good to upscale lower resolutions so we suggest you stick with the Samsung. Judder will be present on 60i and 60p sources but it isn't too noticeable.
Greetings! Thank you for the fantastic reviews, it led me to my latest purchase of the Sony xbr810c! You mentioned that this TV can detect 24p through a 60hz signal coming from a PC, but also that it doesn't work in multiple Windows windows when streaming content through a browser (in these comments). This is my main source of content for movies. This set is far better than my other TV for judder from this source, but is there any other way around this issue besides switching the graphics card output to 24hz every time? I tested a blu ray file through WMP and while judder was still slightly present, not nearly as much. What would be the ideal picture mode or input labeling (if that applies here) to use it as a dedicated PC monitor? For streaming from Hulu/Netflix, would it be better to stream these directly from the apps on the tv to achieve proper 24p playback and no judder?
For a dedicated PC monitor, set the picture mode to game and turn On 'HDMI Enhance' in 'Home' - 'Settings' - 'External Inputs'. To lower the threshold of reverse 3:2 pulldown set 'CineMotion' to 'High', and 'Motionflow' to 'TrueCinema'. The TV should then be able to detect the 3:2 pulldown and remove judder.
My new TV , Samsung 55J6200, has the capability of 24P judder free however it cannot do it over a 60hz signal feed. Would a firmware upgrade solve this? And is this only an issue for 2015 TV's and not older ones? I have HTPC and stream netflix and other services constantly via my browser. My 7 year old 720P 37" Toshiba television was able to recognize this and adjusted accordingly. I am experiencing some judder/jerky playback now and the much larger screen makes it that much more noticeable.
A firmware update could theoretically fix judder but since even high end Samsung models have the same problem (and even TVs from last year), it is unlikely that it will be fixed any time soon. Beside turning 'Auto Motion Plus' On, there isn't anything that can be done to remove judder.
I purchased a Samsung 55' UHD tv. It's the 6500 model which you claim will produce Judder. The salesperson told me that they corrected the problem with this model by increasing the motion rate to 120Hz. Is this accurate?
Not entirely. The JU6500 still have problems with Judder but it can process the signal to remove it. The process is called image interpolation and it works on this TV for sources lower than 60Hz (like bluray and some TV shows). The downside of this processing is that it changes the way the content look by adding what is often referred to the 'soap opera effect' (adding the look of an old soap opera TV show). Some like how it make the motion smoother but some don't like how unnatural it is. Some TVs are able to remove judder without this special processing. This one can't. You can read more about the soap opera effect here.
Hi,thanks for your time and insight. I recently purchased an LG 50LF6000. I use an antenna for television viewing, an xbox 360 for dvds and an Amazon Fire TV stick for Prime video, Netflix, and WatchESPN. When I watch sporting events via the antenna the picture is great with no judder or blur. When I watch a sporting event from my Amazon Fire TV stick, there is a slight judder or blink-like hiccup every so often. This TV is 120hz "Trumotion" which I've come to understand means 60hz native. For some reason there is no Trumotion setting though, so I have no idea how to find the best picture setting for streaming sports from my Amazon Fire TV stick. Do you have any ideas for how I can calibrate my picture, or what picture settings are best for streamed sports content? Thank you.
Our settings works for all contents so start there (make sure to turn On 'Noise Reduction'). Although this TV claim to be 'TruMotion 120Hz' it is really a 60Hz TV and doesn't do image interpolation at all so there is no option for this in the menu. The hiccup problem you see is most probably coming from the source, the Amazon Fire stick. If you can, try the stick closer to the router (even on a different TV if possible) and see if the problem persist. You may not have the best wi-fi reception where your TV is. If that is the issue, a different 'channel' on your router might help.
Most TV's in Europe come with 60Hz/120Hz panels aswell, but change to 50Hz/100Hz when fed with the European 50Hz signals. Feeding them 24p-content, will mostly be played at the same frequency as the American TV's have. There are some 50Hz/60Hz TV's who play 24p-content on 48Hz, like a few models from LG.
Correct. Unlike the CRT era, recent TVs can now adapt to multiple frequencies. Thank you for the extra clarification.
Just wondering a few things about sources on these new smart TV's, particularly a KS8000.
First of all, if I understand correctly, a 24p source is a video that is playing at 23.97fps, correct?
If so, do the native smartTV apps, such as Netflix, Hulu, or even Plex running from the TV handle video in native 24p and therefore play them judder free?
What about my .mp4 movie (all encoded at 23.97fps) collection played via USB drive? Will those also play judder free *without* needing motion settings adjusted?
I currently have a Roku as my source of Netflix/Hulu/Plex, etc on my non-smartTV and I know the Roku does not output a 24p signal. I would like to do away with it, especially if the TV apps are going to play in 24p on their own.
That depends on the source, there are some sources at 24 fps exactly, and some at 23.976fps. The refresh rate of modern TVs is not fixed, and will adjust to the source. Generally the native apps will handle movies in the movie's refresh rate, and so if the TV can play judder free from a 24p source then the inbuilt apps will also play smoothly. For the KS8000 you don't need to adjust any settings to play movies on the native apps or via USB smoothly, so if you are sensitive to judder you may be better off without the Roku.
I have Vizio M70-D3 and he's ready to return it the day we got it because of the soap box effect. It will be strictly used on cable box. So you are saying go to Picture>More Picture and set Film Mode to Auto? Do I do anything to the Reduce Judder and the Reduce Motion Blur? We also have a mini remote that came with it and I am hoping I can get to Picture off that. We haven't tried it yet because this is all new to us and were afraid we'd mess something up. Your thoughts? Love your website, it's been so helpful!
To turn off the soap opera effect, go to 'Settings' -> 'Picture' and drag the 'Reduce Judder' and 'Reduce Motion Blur' sliders to 0. Unfortunately the only way to adjust these settings is with the 'SmartCast' app on the included tablet.
Hi, I have read here that Samsung TVs can handle judder free 24p automatically via USB. I would like to know the same regarding Sony TVs. I have seen many times for Sony TVs "1080 / 24p (HDMI™ only)" - does this mean that 24p content played via USB will not be judder free? Thanks in advance for your answer!
Almost all TVs that can play 24p judder free from a 24p source (our first "Judder-free 24p" test) can also play 24p judder free via USB. Almost all 2016 Sony TVs passed this test so they should be capable, though check our review of the specific model you're looking at. On Sony TVs you may need to set MotionFlow to True Cinema for 24p to be judder free via USB.
I went to some shops (I live in Europe) which showed a demo that apparently should be 24p (I think it was a Phillips PMR demo) and I am surprised that the 100hz vs 50 hz difference is so obvious, since 50 is pretty close to 2x24 and since the 100hz TVs did not have problems showing panning shots. Does that mean they actually downscale to 96hz? I do not think so. That requires True Cinema 24p or something similar, as you've already stated about European TVs.
Additionally, when watching normal movie demos, the 100hz vs 50hz difference was not as obvious. They said that was because it was not 24p.
24p can also be achieve on European models without any pulldown. The fixed refresh rate of a TV is more of a legacy problem. Nowadays, the panel can change its own refresh rate, hence the 100Hz one displaying true 24Hz. This feature is usually not present on 50Hz models though, as you saw by the judder created in the panning shots.
Is there any advantage with running 24fps content on a native 240Hz panel vs. a 120Hz panel? A movie projector displays 24fps. A 120Hz LCD evenly displays 24fps across more duplicate frames. And a (true) 240Hz display would show 24fps across even more duplicate frames. Visually speaking, what is the advantage? Is it because LCD typically is not "fast enough" on its own to show the next frame (thereby "forcing" more duplicate frames helps keep the motion blur away)? As for the other marketing gimmicks (i.e., MotionFlow 480, MotionFlow 960) - I assume what this means is displaying 240 "true" frames per second while injecting 2x-4x additional pure black? What impact does this have? Is it more a contrast enhancer (helps keep the overall panel darker instead of additional light convoluting the panel?
If you disable the motion interpolation setting, there is no advantage. It doesn't 'force' the frame. The response time of 240Hz TVs is usually the same as 60Hz ones. While turning on the motion interpolation setting doesn't also reduce the response time, it does reduce the amount of blur perceived, because it is smoother to the eye. Black frames insertion on most TVs doesn't reduce the amount of blur. If implemented correctly, though (which very few TVs do), it potentially could, by hiding the transition phase of the pixels.
The off section of the video looks smoother than the on section on my computer. Why is that?
It's likely just a matter of perspective. Look at the slow motion portions and watch how the video skips. The 'Off' section will skip a bit more often than the 'On' video, which is because certain frames are displayed longer than others.
I was ready to buy the Samsung JU6500 (on sale for $999 currently) when I read your review that it does not support 24p playback. I had been told by the sales person that it has a 120Hz refresh. The Samsung Product page says it has "Motion Rate 120". So what is the story? Have they upgraded it since the first release? Is the JU6500 a 60Hz or a 120Hz UHD TV?
We watch broadcast (antenna) TV, DVD movies, and use an old ReplayTV (480p, I assume) which we love because it automatically strips out the commercials. We also will want to be able to stream video off the web. Which sub-$1,000 (street price) TV would you recommend that can upscale from this old technology, has 24p support, minimal motion blur, good sound, and of course a great picture?
There is so much marketing hype and "double-speak" out there. I love your reviews and how you explain the features and underlying technology. Thank you.
The JU6500 is listed as having a motion rate of 120, but for Samsung UHD TVs, that equals a 60 hz real refresh rate.
If you don't care about getting 4k, the Samsung J6300 would be the best choice for a TV, as it hits all the marks you're looking for.