Standard 35mm photographic film used for cinema projection has a much higher image resolution than HDTV systems, and is exposed and projected at a rate of 24 frames per second (frame/s). To be shown on standard television, in PAL-system countries, cinema film is scanned at the TV rate of 25 frame/s, causing a speedup of 4.1 percent, which is generally considered acceptable. In NTSC-system countries, the TV scan rate of 30 frame/s would cause a perceptible speedup if the same were attempted, and the necessary correction is performed by a technique called 3:2 Pulldown: Over each successive pair of film frames, one is held for three video fields (1/20 of a second) and the next is held for two video fields (1/30 of a second), giving a total time for the two frames of 1/12 of a second and thus achieving the correct average film frame rate.
Standard 35 mm photographic film used for cinema projection has a much higher image resolution than HDTV systems , and is exposed and projected at a rate of 24 frames per second ( frame / s ) . To be shown on standard television , in PAL - system countries , cinema film is scanned at the TV rate of 25 frame / s , causing a speedup of 4.1 percent , which is generally considered acceptable . In NTSC - system countries , the TV scan rate of 30 frame / s would cause a perceptible speedup if the same were attempted , and the necessary correction is performed by a technique called 3:2 Pulldown : Over each successive pair of film frames , one is held for three video fields ( 1/20 of a second ) and the next is held for two video fields ( 1/30 of a second ) , giving a total time for the two frames of 1/12 of a second and thus achieving the correct average film frame rate .
To be shown on SDTV in PAL-system countries, at what rate is cinema film scanned?
To be shown on SDTV in PAL - system countries , at what rate is cinema film scanned ?
25 frame/s
25 frame/s