Short for 1080 interlaced, where 1080 represents 1,080 vertical pixels. 1080i is one of two ATSC DTV high-definition television standards. The 1080i format creates an image with 1080 lines, each with 1920 pixels, so it has a resolution of 1920 x 1080. 1080i is the minimum resolution necessary to enjoy high-definition programming.
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