Abstract

The transfer of film images to video is complicated by differences in film and video frame rates. In 50-Hz countries, 24 frame/sec film is run at 25 frames/sec making the transfer simple. In 60-Hz countries, the problem is more complicated requiring some means to implement a 3–2 pulldown sequence; that is, one frame of film is transferred to three consecutive video fields and the next film frame is transferred to two video fields. The 3–2 sequence has been accomplished mechanically, optically, and electronically using frame stores. This paper describes another approach which utilizes a normal projector and video camera with a light valve as an electronic shutter to meter the same amount of light from the film to each video field.

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