What The Term 1080p Means

Example of Vizio E-Series TV for 2015. Image provided by Vizio

Original Publish Date: 12/26/2005

Since the day that HDTV was introduced, consumers have been bombarded with terminology that can be quite confusing, especially when shopping for a new TV or home theater component.

One of the areas that is confusing is video resolution. One term that is important to know with regards to resolution is 1080p, but what does it mean?

The Definition of 1080p

Getting down to the basics, this is what term 1080p means.

When looking at TV or Video projection screen (no matter what size), 1080p represents represents 1,920 pixels displayed across a screen horizontally and 1,080 pixels down a screen vertically.

Now, since those pixels are arranged in rows, or lines, this means that those 1,920 pixels are arranged in vertical rows that cross the screen from left to right (or right to left if you prefer), while the 1,080 pixels are arranged in rows or lines, that go from top to bottom of the screen horizontally. The 1080 part (which is referred to as the horizontal resolution - since the end of each pixel row is on left and right edges of the screen) is where the 1080 part of the term 1080p comes from.

The Total Number Of Pixels In 1080p

Now, when you multiply the number of pixels across (1920) and down (1080), the total is: 2,073,600 (two million - 73,000 - 600). This is the total number of pixels displayed on the screen.

In digital camera/photography terms, this is about 2 Megapixels.

You can see right off the bat that 1080p, which is considered near the top of possible video resolution quality for use in TVs and video projectors (currently 4K is the highest - equivalent to 8.3 megapixels), doesn't hold a candle to the Megapixel resolution of even most of the inexpensive digital still cameras.

The reason for this is simple, it takes a lot more bandwidth and processing power to produce moving images than still images, and currently, the maximum video resolution that is possible (may start to become available to consumers by the end of 2016) is 8K, which finally approaches a digital still camera resolution of 33.2 megapixels).

Here Comes The "P" Part

What the P stands for is progressive. No, it doesn't have anything to do with politics, but has to do with how pixel rows (or lines) are displayed on a TV or video projection screen. When an image is progressively displayed, it means that the pixel rows are all displayed on the screen at once (on an LCD, Plasma, or OLED TV) or each row is scanned sequentially, one after the other, on a CRT (picture tube TV).

How 1080p Relates To TVs

The reason 1080p is important is that is part of the High-Definition video standards landscape. For example, most HDTVs now, especially those that are 40-inches or larger, have a 1080p native display (or pixel) resolution.

This means that if you input signal into the TV that has a resolution of less than 1080p, the TV will have to process that signal so that it will display the image on its entire screen surface.

This process is referred to as Upscaling.

However, on the downside, this also means that input signals that are less that 1080p resolution will not look as good as a true 1080p video resolution signal because the TV has to fill in what it thinks is missing, and with moving images, this can result in unwanted artifacts such as jagged edges, color bleeding, macroblocking, and pixelation (this is definitely the case when playing those old VHS tapes!). The more precise guess the TV can make, the better the image will look. Of course, ideally, the TV should not have any difficulty with 1080p input signals, such as those from Blu-ray Disc, and streaming/cable/satellite services, that may offer channels in 1080p.

However, TV broadcast signals are another matter. Although 1080p is considered Full HD, it is not officially part of structure that TV stations use when broadcasting high-definition video signals over the air. Those signals will either be 1080i (CBS, NBC, CW), 720p (ABC), or 480i (Some Local Stations) depending what resolution the station, or the their associated network has adopted.

For more details on 1080p and its applications with TVs, refer to my article All About 1080p TVs.

For information on how 1080p relates to other high-definition video resolutions, refer to my articles:

1080i vs 1080p - Similarities and Differences

720p vs 1080i

720p vs 1080p - A Comparison

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