Hey BrainStuff, Jonathan here.
Every year I attend CES, an annual event highlighting
the newest cutting-edge technology in everything
from autos to televisions.
And when we’re talking about TV, we’re
talking about one big thing: resolution.
In just a few years we’ve seen the race
move from 720 to 1080p, to 4k and beyond.
And this brings us to today’s question:
Does TV resolution matter?
Spoiler alert, the answer is “yes”.
Absolutely.
Or maybe a better way to say it is “yes,
absolutely… asterisk”.
Before we get to all the weird stuff that
asterisk represents, we need to understand
resolution itself.
Resolution starts with the pixel.
A pixel is the smallest possible unit of a
digital image – a single point of light.
When you hear manufacturers talking about
“resolution,” they‘re describing the
number of pixels on a given screen.
So an old-school cathode-ray TV would display
the equivalent of 300,000 pixels on the screen,
while an HDTV could pack more than 2 million
pixels into the frame.
The standard way for TV-makers to classify
resolution is with numbers followed by a letter.
The numbers indicate the rows of horizontal
pixels.
So think 480i, 1080p and so on.
The bigger the number, the more pixels on
the screen.
(The letters at the end of the numbers stand
for interlaced and progressive scan.
The differences are important, but fairly
complicated, so let’s save that for another
day.)
Using more pixels to create an image creates
a smoother, less blocky or pixelated image.
So at first glance, it sounds as if more pixels
equals a better experience, right?
Not so fast, slick.
Here’s where our asterisk comes in.
Pixel density itself is not the only factor
in the race toward a better, sharper image.
If we’re looking at resolution as the ability
to discern fine details, several other factors
come into play.
For instance, what’s the source of the image?
What role does color play?
How close – or far – are you from the
screen?
And how big is the screen?
If you’re watching a small enough screen
- say, 26 inches - from 10 or more feet away,
your eye won’t be able to tell the difference
between anything from 480 to 4k.
The farther you are away from the image source,
the smoother the picture appears.
As for the size of the screen: Well, sure,
you could have a 26-inch TV with 1080-line
resolution, and it would still have the same
number of pixels as a 55 inch TV with otherwise
identical specs.
But the pixels would be physically smaller.
So in this context, size definitely matters.
If you put a 26-inch HDTV with 720-line resolution
next to another 26-inch HDTV with 1080, you
may not be able to tell a difference between
the two.
These are just a few of the pertinent factors
in the overall equation.
There’s another big question here, too:
“Does the human eye have a resolution limit?
It is true that, after a certain point, the
human eye is unable to notice – or appreciate
– the differences between some pixel densities.
With the right source material, equipment
and viewing distance, 4k really can make a
difference.
For example, if you’re sitting a few feet
from a 60-inch 4k Television with an ultra
high definition video feed, you’ll be able
to tell if it suddenly switches to regular
HD.
Or - brace yourself - standard definition.
The limits of HDTV aren’t a failure of technology
– they’re a limit of biology.
If we can’t tell the difference between
a lower-resolution 26-inch TV and an HD version,
then there’s not much incentive to buy the
latest ultra high definition TV set.
But this isn’t the end of the story.
The race for higher resolution continues.
Cameras that shoot in 4k have already become
the norm, and each year brings new innovations.
These ultra-high definition technologies may
not make for a better picture on a home television,
but in a movie theatre, it makes a big difference.
And in the future, we might not care as much
about resolution.
It’s possible that other technologies, like
High Dynamic Range, may become the next big
thing.
Thanks for watching!
If you’d like to calculate the optimal TV
size, resolution and viewing distance for
your home, look at the description, we've
got a neat guide made by Carlton Bale.
And check out this video for more information
on emerging ultra-high definition technology.
In the meantime, I have a question: What do
you think about the future of TV technology?
Where should it be headed – and is it going
in the right direction?
Let me know in the comments and, as always,
stay tuned for more BrainStuff.
