作为没有经验的消费者，在购买新电视或显示器时，有足够多的术语和首字母缩略词让您头晕目眩。有 720p、HD、1080p、FHD、2160p、UHD、4K 等等——它会让人难以抗拒。
如果不完全了解您正在考虑的显示器的规格，您就会有机会为表现不佳的东西多付钱。按照今天的标准，使用 32 英寸 720p 电视作为电脑显示器是边缘受虐狂。
对于那些不满意需要坐在距离电视整整 10 英尺以使文本显得清晰的人来说，您可能听说过 4K。今天，4K 显示分辨率被认为是高质量流媒体和游戏的标准。问题是，有很多人不确定 4K 是什么意思，或者它与UHD和 2160p 等术语有何不同。
在本文中，我们来谈谈 4K、UHD和 2160p 之间的区别。
什么是 4K？
记住真正 4K 显示器规格的一种简单方法是根据本术语中的数字 (4,000) 进行比较。根据定义，4K 显示器的水平显示分辨率至少为 4,000 像素。这通常是指 4096 × 2160 的显示分辨率，总共有 800 万个有效像素。该分辨率的总像素数是 1080p 显示器的四倍。
然而，最商业化的 4K 显示分辨率是 3840 × 2160。第一个数字 3,840 是显示器的水平分辨率，以像素为单位，第二个数字 2,160 是它的垂直分辨率。这似乎打破了 4K 的唯一规则，但这就是该术语的适应方式。
“4K”一词最初来自数字电影分辨率，现在称为DCI 4K。3840 × 2160 显示分辨率现在是 4K 标准，因为它在电视和显示器中非常普遍。在大多数情况下，4096 × 2160 的显示分辨率要么会拉伸和扭曲图片，要么需要顶部和底部的黑框——消费者都不乐意看到这两种情况。
所以，为了安抚家庭消费者，4K几乎都是指3840×2160的显示分辨率。
什么是超高清？
UHD代表“超高清”。与 4K 不同，其中 4096 × 2160 是高清分辨率，UHD显示器绝对是 3840 × 2160。
然而，由于真正的 4K 并不常见，UHD和 4K 以可互换的方式使用。不过，从技术上讲，3840 × 2160 显示器只是UHD。
一些零售商不仅将这两个术语互换使用，而是将 3840 × 2160 称为 4K UHD，即UHDTV1。8K UHD
为7680×4320，简称UHDTV2。
回到我们最初所说的对消费者友好的 4K 定义，UHDTV1（目前仅称为
UHD）和 4K 是相同的。
什么是 2160p？
术语“2160p”用于描述垂直分辨率为 2,160 像素的显示分辨率。“p”代表“逐行扫描”，有时也称为“非隔行扫描”。
逐行扫描是按顺序绘制运动图像每一帧的线条的格式。这与隔行扫描视频形成对比，其中每帧的奇数和偶数行以交替方式绘制。
简单来说，2160p 之于垂直分辨率就像 4K 之于水平分辨率。话虽如此，实际上所有 2160p 显示分辨率也是 4K（根据其松散的定义）。
等等，他们都一样吗？
总结和比较，显示器可以是真正的 4K 和 2160p (4096 × 2160)。但是，UHDTV1（目前仅称为UHD）显示器始终为 2160p，因为它指的是 3840 × 2160 的显示分辨率。
当UHDTV2（或消费者友好型 8K）普及时，UHD将不再是 2160p 的代名词，因为UHD将同时描述 4K 和 8K 显示分辨率。此时，区分 4K
UHD或 8K UHD将变得更加重要。
最后，由于 4K 的适应定义，3840 × 2160 分辨率目前可以称为所有 4K、UHD和 2160p。因此，在传统情况下，按照 4K 的宽松定义，它们都是一样的。
当“4K”这个词被创造出来时，它给显示市场带来了很多混乱。消费者熟悉 720p 被称为 HD（高清）和 1080p 被称为FHD（全高清）。当将 4K 称为 2160p 和UHD时，它变得统一且更易于理解。
然而，零售商开始将此显示分辨率简称为 4K。这可能是因为“2160p”不能很好地从舌头上滚开，但它打破了许多消费者已经习惯的格式。更糟糕的是，当提到 3840 × 2160 的分辨率时，“4K”在技术上并不准确——这是反对该术语流行的诚实论据。
零售商可能急于将所有内容都标记为 4K 的另一个原因是，将所有这些令人困惑的标题混为一谈会使产品听起来更具特色。4K UHD 2160p电视听起来比 2160p 电视更划算，对吧？嗯，这是相当多余的。
当您购买最新高清标准的新显示器时，只需知道 3840 × 2160 的分辨率就是您所寻找的。不过，还有其他一些缩写词和规范不仅仅是绒毛——例如，请查看在线技术提示关于
4K 与 HDR 和杜比视界(4K vs. HDR and Dolby Vision)的文章。
How Is 4K Different From UHD and 2160p?
When it comes to buying a new televisіon or
monitоr as an іnexperienced cоnsυmer, therе are enough terms and acrоnyms to
make уou dizzу. There’s 720p, HD, 1080p, FHD, 2160p, UHD, 4K, and more – it can
get overwhelming.
Without fully understanding the specifications
of the display you’re considering, you’re opening yourself up to the
opportunity of overpaying for something that underperforms. By today’s
standards, using a 32-inch 720p TV as a computer monitor is borderline
masochistic.
For those of you who aren’t satisfied with
needing to sit a full 10 feet away from your TV for text to appear crisp,
you’ve probably heard about 4K. Today, 4K display resolutions are considered
the standard when it comes to high-quality streaming and gaming. The thing is,
there are many people out there who aren’t exactly sure what 4K means or how it
differs from terms such as UHD and 2160p.
In this article, let’s talk about the
differences between 4K, UHD, and 2160p.
What Is 4K?
An easy way to remember the specifications of
a true 4K display is by drawing comparisons based on the number (4,000) in this
term. By definition, 4K displays have at least 4,000 pixels of horizontal
display resolution. This commonly refers to the 4096 × 2160 display resolution,
which totals 8 million active pixels. This resolution has four times the number
of total pixels as a 1080p display.
However, the most commercialized 4K display
resolution is 3840 × 2160. The first number, 3,840, is the display’s horizontal
resolution, in pixels, and the second number, 2,160 is its vertical resolution.
This seems to break the one and only rule of being 4K, yet it’s how the term
has been adapted.
The term “4K” originally comes from a digital
cinema resolution, now referred to as DCI 4K. The 3840 × 2160 display
resolution is now the 4K standard due to how common it is among TVs and
monitors. In the majority of cases, a 4096 × 2160 display resolution will
either stretch and distort the picture or require black boxes across the top
and bottom – neither of which consumers are happy to see.
So, to appease home consumers, 4K almost
always refers to the 3840 × 2160 display resolution.
What Is UHD?
UHD stands for “ultra high definition”. Unlike
4K, where 4096 × 2160 is the true-to-definition resolution, a UHD display is
definitely 3840 × 2160.
However, with how uncommon true 4K is, UHD and
4K are used in an interchangeable way. Speaking technically, though, a 3840 ×
2160 display is only UHD.
Some retailers, rather than just using the two
terms interchangeably, refer to 3840 × 2160 as 4K UHD, which is UHDTV1. 8K UHD
is 7680 × 4320, referred to as UHDTV2.
Going back to what we originally said about
the consumer-friendly definition of 4K, UHDTV1 (presently referred to as just
UHD) and 4K are the same.
What Is 2160p?
The term “2160p” is used to describe display
resolutions where the vertical resolution is 2,160 pixels. The “p” stands for
“progressive scan,” sometimes referred to as “non-interlaced.”
Progressive scanning is a format in which the
lines of each frame of a moving image are drawn in sequence. This comes in
contrast to interlaced video, where the odd and even lines of each frame are
drawn in an alternating fashion.
To put it simply, 2160p is to vertical
resolution what 4K is to horizontal resolution. That being said, practically
all 2160p display resolutions are also 4K (by its loose definition).
Wait, They’re All the Same?
To summarize and compare, a display can be
both true 4K and 2160p (4096 × 2160). However, a UHDTV1 (presently referred to
as just UHD) display is always 2160p, because it refers to a display resolution
of 3840 × 2160.
When UHDTV2 (or consumer-friendly 8K) gains
popularity, UHD will no longer be synonymous with 2160p because UHD is set to
describe both 4K and 8K display resolutions. This is when the distinction of 4K
UHD or 8K UHD will be more important to make.
Finally, due to the adapted definition of 4K,
a 3840 × 2160 resolution can currently be referred to as all of 4K, UHD, and
2160p. So, in conventional cases and going by the loosened definition of 4K,
they’re all the same.
When the term “4K” was coined, it brought much
confusion to the display market. Consumers were familiar with 720p being referred
to as HD (high definition) and 1080p being referred to as FHD (full high
definition). When referring to 4K instead as being 2160p and UHD, it becomes
uniform and simpler to digest.
However, retailers began shorthanding this
display resolution as 4K. This may be because “2160p” just doesn’t roll off the
tongue very well, but it broke a format that many consumers were getting used
to. Even worse, “4K” is not technically accurate when referring to a resolution
of 3840 × 2160 – an honest argument against the popularity of this term.
Another reason retailers may be eager to label
everything as 4K is because lumping all of these confusing titles together
makes the product sound more featureful. A 4K UHD 2160p TV sounds like such a
bigger deal than a 2160p TV, right? Well, it’s rather redundant.
When you’re shopping for a new display at the
latest standard of high definition, just know that a resolution of 3840 × 2160
is what you’re looking for. There are other acronyms and specifications that
aren’t just fluff, though – for example, check out Online Tech Tips’ article on
4K vs. HDR and Dolby Vision.
