Standard definition (SD) refers to a type of video or television broadcast that has a lower quality than high definition (HD). The standard resolution for SD is 480p, which means that the screen has 480 vertical lines of pixels. SD was the standard for television broadcasts and DVDs before the advent of high definition in the early 2000s.
SD content can still be found on older televisions, DVDs, and some streaming services. However, many modern devices and platforms only support HD or higher resolutions. The lower resolution of SD means that the picture quality may appear pixelated or grainy on larger screens or when viewed up close. Nonetheless, SD content remains a popular option for those who do not require the high-quality visuals of HD content.
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