What are SD, HD, Full HD, Ultra HD
Preface Normally, the resolution of our common computers is 1280×720 or 1920×1080. What category do they belong to? What level does this value belong to? Let us study it systematically. Screen resolution refers to the number of pixels displayed horizontally and vertically on the screen, and the unit is px. It determines the settings for how much information is displayed on the computer screen, measured in horizontal and vertical pixels. For example, the resolution of 1280×720 means: the number of pixels in the horizontal direction is 1280, and the number of pixels in the vertical direction is 720. What we need to be clear is that pixels are indivisible and define the smallest unit of a digital sequence to represent an image. SD: SD is the abbreviation of Standard Definition , which refers to a format with a vertical resolution below 720p. Video formats such as VCD, DVD, and TV programs with a general resolution of about 400 lines are Standard Definition. Typical standard definitio...