Does Refresh Rate Really Matter for Enjoying Movies and Video Content?
As a home theater buff and streaming enthusiast, I‘m always trying to determine if those buttery-smooth hyper-high refresh rate TVs and monitors really enhance the experience of watching movies, shows and videos in any noticeable way. Marketers will claim bigger numbers are always better, but our eyes can only perceive so much. Where is the point of diminishing returns when it comes to refresh rates and frame rates for different types of viewing? Let‘s geek out on the details together and see if we can find the answers!
What Exactly is a TV or Monitor‘s Refresh Rate?
The refresh rate is the number of times per second that a display can redraw or “refresh” the image on the screen. This is measured in Hertz (Hz). A higher refresh rate means the image is refreshed more frequently, which allows motion to appear smoother to our eyes.
Today‘s TVs and monitors typically have refresh rates of 60Hz, 120Hz, 144Hz, 240Hz or higher. But what do those numbers really mean for how smooth video content will look? And do we get any benefit by going higher for enjoying movies and streaming video content? Let‘s break it down.
How Refresh Rate Relates to Frame Rate
To understand refresh rates, we first need to understand frame rates…
The frame rate is the frequency at which consecutive images called frames are displayed in a video or content source. This is measured in frames per second (fps). A higher frame rate means more unique frames are displayed each second, resulting in smoother and more natural motion.
Movies are typically filmed at 24 fps. Most streaming services play content at 24, 30 or 60 fps. Live sports broadcasts can range from 60 fps up to 120 fps depending on the event and broadcaster. And video games can achieve extremely high frame rates from 60 all the way up to 360 fps depending on the game console or PC hardware powering them.
The refresh rate acts as the ceiling for how high the frame rate can go. If the source content‘s frame rate exceeds the display‘s refresh rate, you won‘t see any benefit of those extra frames. The two work together – higher source frame rates require equally high refresh rates to take full advantage.
Why We Settled on 60Hz as the Standard Refresh Rate
To understand the most common refresh rates used today, it helps to know a little history. When television standards were first being developed, engineers had to determine the minimum refresh rate required to make motion appear reasonably smooth to the human eye.
Going too low would result in an unwatchable flickery picture. After testing different rates, the standard television refresh rate was set at 60 Hz.
At this rate, our eyes see enough frequent refreshes each second that motion looks reasonably fluid and natural, whether from movies, broadcasts or other video sources. And 60 Hz also synced well with common electric power frequencies.
So the ubiquitous 60Hz television and monitor refresh rate we live with today has its roots in these early engineering tests for minimum standards to make motion seem smooth.
What Happens at Higher 120Hz, 144Hz or 240Hz Refresh Rates?
As display technology continued advancing, TV and monitor makers eventually introduced screens that could refresh at rates higher than the original standard 60Hz. Early steps included rates like 100Hz and 120Hz. Today‘s high-end displays can reach 240Hz, 360Hz or even higher!
But do we really see any benefit from all this extra refreshing? As discussed earlier, the source content frame rate is the key factor.
If a TV show or movie is playing at 30fps or 60fps, even a basic 60Hz screen can keep up just fine displaying each frame. Pushing the refresh rate higher to say 120Hz or 240Hz won‘t make the content‘s frame rate suddenly jump up too. The source frames per second remains fixed.
However, with sports and video games where source fps can exceed 60, having a higher refresh rate display does become more useful – it ensures each high fps source frame gets displayed for our eyes to see. We‘ll look at these use cases more closely later on.
First, let‘s walk through exactly what happens at different refresh rates when playing typical 24fps movie content.
Playing 24fps Movie Content at Various Refresh Rates
As outlined earlier, most movies and cinematic films are natively shot and recorded at 24 frames per second. This was chosen specifically to provide an optimal motion look and film esthetic.
So what happens when displaying 24fps movie content on screens with different refresh rates? Let‘s go through some examples:
60Hz Display
At 60 refreshes per second, each 24fps frame must be displayed 2.5 times on average to match the 60Hz rate. The TV or monitor repeats frames as needed using a process called 3:2 pulldown to achieve this match.
However, since frames can‘t be split in half, they get displayed in an alternating sequence where some frames are shown 3 times and others just 2 times before moving to the next one. This can cause slight stutter or judder on panning shots.
120Hz Display
At 120 refreshes per second, each 24fps movie frame can be shown exactly 5 times in a perfect sequence to match the 120Hz refresh rate. There is no uneven pulldown process required. This can help reduce judder and make motion appear a little smoother.
240Hz Display
Here the extra high 240Hz refresh rate allows each 24fps frame to be displayed 10 times in a row before moving to the next frame. This can further help enhance motion smoothness. Although it‘s diminishing returns – the difference compared to 5 times at 120Hz is not very noticeable.
Beyond 240Hz
As you go even higher in refresh rate like 360Hz, 480Hz etc, frames will just continue to display multiples of the 24fps movie frames. But there is barely any perceptual difference compared to 240Hz for typical movie watching. Excessively high refresh rates end up being overkill.
So in summary, while 60Hz works fine, stepping up to a 120Hz display can help minimize judder and make 24fps movies look a bit crisper. But going above 240Hz offers rapidly diminishing improvements.
But Aren‘t Movies Meant to Look Like 24fps?
Some cinephiles may argue that the original artistic intent was for movies to be viewed at 24fps, so displaying at higher multiples goes against this.
And it‘s true, a super-smooth soap opera-like look is not the goal for cinema. Some slight judder provides that classic film look and feel.
But a little bit of added smoothness provided by moderate refresh rates up to 120Hz simply helps reduce distractions from excessive judder while still preserving the creative intent. Going too high above 240Hz risks looking too smooth and hyper-real.
It‘s a balancing act between completely eliminating judder which could alter the director‘s vision, versus having so much judder that it distracts the viewer – good purpose-built home theater projectors aim for this sweet spot. Just my two cents as a movie buff!
What About Streaming Movies and TV Shows?
We can apply similar logic to streaming services like Netflix, Amazon Prime, Hulu and others when analyzing refresh rates. Most streaming video content plays at either 24, 30 or 60 frames per second.
Even live event streaming services rarely exceed 60fps currently. Some examples for reference:
| Streaming Service | Typical Frame Rates |
|---|---|
| Netflix | 24/30fps movies Some 60fps originals |
| Amazon Prime | 24/30fps movies and shows |
| Hulu | 24/30fps movies 60fps some shows |
| YouTube | 24/30/60fps, some 60fps HFR |
| Twitch | Up to 60fps streams |
So again, a standard 60Hz display refresh rate is perfectly sufficient to enjoy streaming movies, shows, events and other online video content without any issues.
A higher 120Hz, 240Hz or beyond refresh rate monitor or television will not make streaming video frame rates suddenly jump higher. The content remains at 24, 30 or 60fps.
This means that higher refresh rates offer no practical improvement for streaming, since 60Hz easily covers the current frame rate limits from online providers.
Perhaps someday if streaming services begin offering 120fps or 240fps high frame rate formats widely, higher refresh rates would help. But for now 60Hz has all streaming video totally covered.
When Do Higher Refresh Rates Shine? Gaming and Live Sports!
We‘ve established that higher refresh rates don‘t really provide much practical benefit for enjoying movies or streaming shows where frame rates top out at 60fps or below.
But there are two big exceptions where higher refresh rates do make a meaningful difference – video games and live broadcast sports!
Live Sports
While scripted shows and streaming events are usually 60fps or lower, major sports broadcasts will often use higher frame rates for smoother capture of fast motion.
Common frame rates for live sports include:
- 720p at 60fps
- 1080i at 60fps
- 1080p at 60fps
- 4K at 60fps
And for high-end productions such as NFL, NBA, MLB, NHL, MLS and others, they may use:
- 1080p at 120fps
- 4K at 120fps
So to most accurately visualize these high motion frame rates from live sports, a higher 120Hz+ refresh rate display becomes important. At 60Hz, you can‘t fully appreciate all the frames being delivered above that rate.
Video Games
For gaming, refresh rate choices become crucial. Modern game consoles and especially gaming PCs can readily push frame rates from 60 fps all the way up to 360 fps depending on the GPU power and game engine.
Esports gamers strive for the highest frame rates possible for ultra smooth visuals and lag-free response. So displays with 120Hz, 144Hz, 240Hz or even 360Hz refresh rates help ensure every source frame gets displayed properly.
A gamer running at 240fps on a 240Hz monitor will have a much smoother experience than if limited to 60Hz. So refresh rate is hugely impactful for gaming.
What About Refresh Rate for 4K HDR Movie Content?
As 4K UHD TVs with High Dynamic Range become more mainstream for movie watching, some may wonder if higher refresh rates are also required to take full advantage of the higher resolution clarity.
The good news is that 60Hz is generally sufficient even for 4K streaming and Ultra HD Blu-ray movie content. While 4K gaming can benefit from higher 120fps frame rates, movies and streaming video content remains at 24/30fps currently, even in 4K HDR.
So a 4K television or projector with standard 60Hz refresh rate is perfectly adequate to enjoy the additional detail 4K brings for films and shows. Higher frame rate 4K content may come further down the road, but isn‘t widely available yet outside gaming scenarios.
For now 60Hz can fully maximize 4K movie watching, but 120Hz is nice for a little future proofing headroom.
Diminishing Returns Above 120Hz for Movies and Video
Based on the frame rate limitations of movies and streaming content outlined earlier, we can conclude:
Refresh rates higher than 120Hz provide greatly diminishing improvements for movie watching and streaming video purposes
Beyond 120Hz, you are exceeding the source frame rate capabilities of virtually all movies and streaming content. So while motion smoothness continues improving mildly up past 240Hz and higher, it‘s overkill that goes unused.
Display technology has perhaps advanced faster than content frame rate formats. Until movies and streaming regularly offer frame rates above 120fps, a 120Hz screen provides plenty of future-ready headroom.
Of course gamers and sports fans may still appreciate 240Hz, 360Hz etc. But for cinema buffs and streaming viewers, 60Hz to 120Hz hits the sweet spot that human eyes can appreciate.
Do Higher Refresh Rate Claims Always Mean You‘ll See the Benefit?
Not necessarily! Keep in mind many TVs and monitors today use various frame interpolation, motion smoothing and processing techniques to artificially boost the perceived frame rate.
So a 60Hz native panel getting a simulated 120Hz mode may not appear as smooth in motion clarity as a natively 120Hz display. Look for true native refresh rate specs when possible for the full experience.
True 120fps content on a native 120Hz monitor will always look better than artificial interpolation. This is where subjective testing and reviews help cut through the marketing hype.
The Verdict? 60Hz Minimum, 120Hz Sweet Spot for Movies and Video
After crunching the numbers, eyeballing the math and geekily analyzing the interplay between refresh rates and frame rates across different types of content, here is my takeaway:
For movie watching and streaming video, a 60Hz display should meet needs for most viewers. Stepping up to 120Hz helps minimize judder and allows some future flexibility. But going above 120Hz offers rapidly diminishing returns and is overkill for 24/30fps content.
Of course, gamers and sports fans will still appreciate 240Hz, 360Hz etc for silky smoothness. But for home theater movie night and binge watching shows, you can set your mind at ease knowing a 60Hz TV or monitor has you covered beautifully. The extra fluidity of 120Hz is nice, but certainly not required to enjoy today‘s content to the fullest.
I hope breaking down the key technical concepts around refresh rates vs frame rates for different viewing use cases shed some light on the ideal range to aim for. Let me know if you have any other questions! I‘m always happy to chat home theater. Enjoy your next movie night or streaming binge.