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  • 1080i is an abbreviation referring to a combination of frame resolution and scan type, in the domains of high-definition television and high-definition video. The term assumes a widescreen aspect ratio of 16:9, a spatial resolution of 1920 pixels × 1080 lines, and a temporal resolution of 50 or 60 interlaced fields per second. This format is used in the SMPTE 292M standard. The choice of 1080 lines originates with Charles Poynton, who in the early 1990s pushed for "square pixels" to be used in HD video formats. Wikipedia