480i is a video display resolution that consists of 480 horizontal lines of vertical resolution. The "i" stands for interlaced, meaning that the image is created by alternating between odd and even lines. This format was commonly used in standard-definition television broadcasts and is part of the NTSC video standard in North America. While 480i was widely used in the past, it has largely been replaced by higher resolutions like 720p and 1080p, which offer better image quality. Despite its decline, 480i is still relevant for some older devices and content, particularly in DVD playback and classic television shows.