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ISO 9642:1993 Cinematography -- Time and control code for 24, 25 and 30 frames per second motion-picture systems -- Specifications
standard by International Organization for Standardization, 08/01/1993
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Full Description
Specifies digital code formats and modulation methods for motion-picture film to be used for timing, control, editing and synchronization purposes. Also specifies the relationship of the codes to the motion-picture frame. Two types of code are described: type C (a continuous code very similar to the continuous code specified in IEC 461) for film moving continuously at the time of both recording and reproduction, and type B (a non-continuous, block-type code, composed of blocks of data with gaps between the blocks) for intermittent film motion.