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The number of frames-per-second (fps) used for both analog NTSC television broadcasts and interlaced (non-progressive) video recording in the United States and other countries that use NTSC broadcast signaling. Often incorrectly referred to as 30 fps, a designation only used for progressive capture and delivery. For timecode references, in which each frame has a unique minute:second:frame designation, the use of drop-frame timecode for 29.97 fps content is derived by dropping two frame numbers—but no actual video frames—for every minute of video except for the tenth minute to eliminate the 1.8 frame-per-minute discrepancy between 30 fps and 29.97 fps.