576i is the shorthand name for a video mode. The i stands for interlaced, the 576 for a vertical resolution of 576 lines, usually with a horizontal resolution of 720 pixels and an aspect ratio of 4:3; that is standard-definition television (SDTV). The field rate (not the frame rate) is usually 50 Hertz and can be given explicitly after the letter (576i50). It is usually used in former PAL and SECAM countries for these are exactly that resolution, but analogue. It can be transported by both major digital television formats, ATSC and DVB, and on DVD.