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Another difference between 50 Hz and 60 Hz standards is the way motion pictures (film sources as opposed to video camera sources) are transferred or presented. 35 mm film is typically shot at 24 frames per second (fps). For PAL 50 Hz this allows film sources to be easily transferred by accelerating the film by 4%.
The field rate, which is 60 Hz (or 59.94 Hz when used with NTSC color), is sometimes included when identifying the video mode, i.e. 480i60; another notation, endorsed by both the International Telecommunication Union in BT.601 [3] and SMPTE in SMPTE 259M, includes the frame rate, as in 480i/30.
A low frame rate causes aliasing, yields abrupt motion artifacts, and degrades the video quality. Consequently, the temporal resolution is an important factor affecting video quality. Algorithms for FRC are widely used in applications, including visual quality enhancement, video compression and slow-motion video generation.
The frame rate refers to how often a new field is shown per second. At 50 Hz, 50 fields are shown each second. This results in 25 full frames per second when the odd and even fields are combined. At 60 Hz, 60 fields are shown per second. This results in 30 full frames per second. Interlacing affects how motion is perceived in 1080i.
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60 Shot on digital video in interlaced 60 fps, with some scenes shot on 35 mm movie film in 24 fps. Shown in cinemas in 24 fps and in interlaced 60 fps with 24 fps segments on DVD and Blu-ray. 1999 The Blair Witch Project: Daniel Myrick, Eduardo Sanchez: English Shot on Hi8 in interlaced 60 fps, with some scenes shot on 16 mm film in 24 fps ...
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