What is the HD resolution?

HD resolutions are available in three standard forms: 720p, 1080i and 1080p. Resolution determines the fineness of bitmap image details. High-definition resolution refers to images or videos with a vertical resolution greater than or equal to 720. There are three display formats: 720P (1280×720, non-interlaced, field frequency is 24, 30 or 60), 1080i (1920×1080, interlaced, field frequency 60), 1080p (1920×1080, non-interlaced, field frequency 24 or 30).

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

High Definition (HD) refers to images or videos with a vertical resolution greater than or equal to 720. The sizes are generally 1280×720 and 1920×1080. "HD" stands for "high definition".

HD resolution display format

HD has three display formats, namely: 720P (1280×720, non-interlaced, field frequency is 24, 30 or 60); 1080i (1920×1080, interlaced, field frequency 60); 1080p (1920×1080, non-interlaced, field frequency 24 or 30)

HD HD is the Chinese abbreviation of "High Definition" in English, which means "high resolution". It has four meanings: HD TV, HD equipment, HD format, and HD movies. DVD provides audio-visual enjoyment that is unparalleled in the VCD era. However, with the advancement of technology and the continuous follow-up of people's needs, people have put forward higher requirements for the quality of videos. Usually the format with a physical resolution of 720p or above is called high definition. The English expression is High Definition, or HD for short. The so-called Full HD refers to a progressive scan with a physical resolution of up to 1920×1080, that is, 1080p HD, which is the top HD specifications.

Extended knowledge:

Resolution, also known as resolution and resolution, can be subdivided into display resolution, image resolution, printing resolution and Scan resolution, etc. Resolution determines how fine the details of a bitmap image are. Typically, the higher the resolution of an image, the more pixels it contains, the clearer the image, and the better the quality of the print. At the same time, it will also increase the storage space occupied by the files.

The units used to describe resolution are: dpi (dots per inch), lpi (line per inch), ppi (pixels per inch) and PPD (PPPixels Per Degree, pixels per degree). But only lpi is a scale that describes optical resolution. Although dpi and ppi are also units within the resolution category, their meanings are different from lpi. Moreover, lpi and dpi cannot be converted and can only be estimated based on experience. In addition, ppi and dpi are often used interchangeably. But there are also differences in the fields they use. From a technical point of view, "pixels" only exist in the field of computer display, while "dots" only appear in the field of printing or printing.

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