Today noticed the news that will soon appear on Youtube new feature to download and watch 1080 HD video.
In Youtube long time ago there was 720 HD, with the extension 1280x720.
The number 1080 refers to the number of horizontal lines in the picture. Expanding HD 1080 - is 1920x1080, which means 1920 pixels horizontally and 1080 vertically. Aspect ratio is there 16:9. In the Internet recently was hard to found video with such extension To look for in a natural extension of the standard (one to one), you must have monitor matrix WUXGA (1920x1200) and more. As a rule - such displays are with matrix of 24 inch and more. Of course there are 22 inch and smaller, but everything there is a little too small for the human eye.
The main advantages of such a video - detailing and realistic video. But if you sit five meters from the monitor, the 720HD with a good enough margin.
Here is a schedule of basic standards and extensions. Taken from Wikipedia.
As for me, HD1080 is not needed now, since my monitor is less than an extension, the Internet is not fast enough to download video while browsing online. So I continue to make videos and movies at 720p.
Here is picture, a comparison of basic standarts
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