| 摘要 |
A digital cue system for use with a motion picture projector permits activation of control functions in time synchronization with the passage through the projector of indicia or cues attached to the motion picture film. Each cue comprises one or more cue appliques arranged to form a digital code pattern which is detected to activate a control function associated therewith. In an exemplary embodiment, the cue appliques are metallic foils adhesively attached to the motion picture film. Passage of these appliques through the motion picture projector is detected by one or more non-contacting proximity detectors which generate signals indicative of the digital code patterns. Digital circuitry processes the signals output from the proximity detectors to determine the digital code corresponding to each pattern and a specific control function associated with that digital code is then activated. By utilizing and detecting digital code patterns, cueing of a large number of control functions with a small number of cue appliques is made possible.
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