What are these 360p, 480p, 720p, 1080p units for videos? What are the ideas behind it?

What are the these 240p, 360p, 480p, 720p, 1080p units for videos? What are the ideas behind it?   -Edward Lin 2018/10/05

    Remember every Youtube video you're going through, and you're super bugged by the slow internet that keeps you from watching Rick and Morty clear. You keep on clicking the settings at the status bar, trying to change the video resolution to 720p HD or 1080p HD, but then you totally realize that your internet connection just won't work, and the automatic settings continuously jumping back to 240p. "It just won't work!!" you moaned,  then shut the rather bothering site, turning to something else.
 

  We all have experienced the described annoying situation. From all we know, the higher the number is in front of the unit "p", the clearer we got your videos. But what exactly the unit "p" means, and what are the concepts that lie behinds it?

Before we go anywhere though, lets start with the units of all videos, Pixels.

PIXELS

  As bits are the basic unit of information used in computing and digital communications (basically all our computing science is based on it), a "pixel", is a physical point in a raster image, that is literally the smallest addressable, controllable element of a picture represented on a screen.

A line is a line but isn't a line.

  It sure sounds like a paradox. Like the above line, in the real world, it's simply a line we can draw out of any pen, nothing big deal. However in the digital world, any image is based on dots, which means the line above is group of square dots, connecting to look like a line. The dots that form the image in the digital world, are "pixels". Pixels are basically blocks of a simple color, and the bigger block you use to compose an image, the jaggier it looks.

But what does "Pixels" have to do with the video solution we're talking about?

  From the Mario above, we can see the left one as 16*12 = 192 dots, and the right as 67*50=3350 dots group of image, telling the right one apparently clearer. This also works in the area of video resolutions.


360p, 480p, 720p, 1080p?

  "Video solution" actually represents the lines an image can show in the vertical solution, saying that its actually the horizontal lines showed in the vertical frame. So accordingly, "360" in "360p" stands for the 360 vertical pixels(dots) in the video. However, the "p" doesn't equals to the "pixels" we just mentioned, to most peoples misunderstanding, it actually means "Progressive Scan".



The below are the common video resolution we see in life.

360p(480*360): Having a 480 pixels across the screen and 360 pixels down the screen. Is the lowest and least that most digital signage support.
480p(854*480): Having a 854 pixels across the screen and 480 pixels down the screen. The resolution commonly known as "DVD quality"
720p(1280*720):  Having a 1280 pixels across the screen and 720 pixels down the screen. True high-definition starts at 720p. Usually called the half HD.
1080p(1920*1280): Having a 1920 pixels across the screen and 1280 pixels down the screen. Current HD.



Now we know all basics in the video graphic industry. For the future of course, it's only getting better. The past 10 years have already been an era of Blu-ray, which is capable of holding ultra-high definition resolution(2160p), not to mention the new king in the video industry, 4k(4096*2160). What will gaming and movie be like? Leave a comment below! For more information, visit our official Eago site : https://www.eagovisiontech.com/







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