A-B rolls The process used to create optical effects such as dissolves in film and videotape. Two rolls are used alternately. The A roll contains the first shot, and the B roll contains the second. The two rolls overlap for the length of the dissolve.

academy leader Film that precedes the first picture or sound. It contains synchronizing marks and countdown information used by the film lab for processing the composite print.

analog A form of electronic signal composed of varying voltage levels. Analog signals are of lower quality than digital signals.

anamorphic An image that is squeezed laterally so that the width-to-height ...

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