The technique in which with successive pair of film frames, one is held for three video fields, and the next is held for two, is called what?
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.