Administered by the FCC, NTSC broadcasts 60 half frames per second, which is known as 60 "fields" per second in TV jargon (59.94 fields per second to be exact). NTSC uses 525 lines of resolution: the first 480 lines in each frame are the image, and the last 45 are the "vertical blanking interval" (VBI), which was designed to give the electron gun time to reposition itself from the bottom of the last frame to the top of the next.
So how can NTSC be other than 29.95 frames?!?
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