Abstract: In a system and method for dynamically synchronizing a digital soundtrack with a moving picture in motion picture media, the system includes a device for presenting the motion picture media, wherein the motion picture media further includes an analog soundtrack. The digital soundtrack further includes a variable delay to compensate for the distance between a frame in the moving picture and a portion of the digital soundtrack corresponding thereto. A synchronizing device is correlated to a digital soundtrack pickup and an analog soundtrack picture in a feedback loop. A processor in the synchronizing device is adapted to process the digital soundtrack and the analog soundtrack to generate a control signal based on the difference between the location of a transient reference in the analog soundtrack and the same transient in the digital soundtrack, and to use the control system to adjust the variable delay in the digital soundtrack for synchronization thereof.

Abstract: An audio data readout device for a motion picture film and a clock generating device in a changeover system for a motion picture film. First and second clock generating circuits generate first and second clocks of predetermined frequencies based upon a repetition frequency of perforations detected by first and second film readers and a repetition frequency of a track pitch of audio data, and route the resulting clocks to a changeover switch. At a changeover time, a changeover controller switchingly controls the changeover switch to select the second clock. A system clock generating circuit has loop characteristics of a longer time constant than the first or second clock generating circuits and smoothly locks the second clock to generate a system clock which is outputted. A stable and accurate system clock can be generated and outputted even when film running is unstable at the changeover time.

Abstract: A motion picture film monitor structured and operated in the film path of a film projector, having a plurality of film support rollers for supporting the film as it passes adjacent a plurality of sensors. The plurality of sensors includes at least one proximity sensor positioned preferably adjacent one of the guide rollers and when more than one proximity sensor is spaced closely to each other, a different frequency is used by each proximity sensor. In addition, an optical film presence detector including a light emitter and a light sensor is positioned adjacent another support roller such that when the film passes the film presence detector, it is supported by the roller. A film motion detector using a similar optical system is positioned adjacent one of the support rollers which supports the film in close proximity to the sensor. Electronic circuitry and connections therefore, are structured to allow for a logically configured and miniaturized monitor.

Abstract: A changeover control arrangement is provided for projection apparatus to allow two identical projection apparatus with identical changeover control arrangements and interconnected by a multi-conductor changeover interconnection cable to be utilized alternately and sequentially for multi-reel presentations or other projection formats requiring the operation of more than one projection apparatus.The changeover control arrangement of each projection apparatus includes a momentary actuated changeover control switch that is interconnected over the changeover interconnection cable to activate an illumination generating source; for example, an LED device. The illumination generating source has no electrical connections to the electrical or ground reference system of the projection apparatus in which the illumination generating source is physically disposed.

Abstract: There is disclosed a method for generating a low-frequency sound program for play during the performance of a motion picture film to produce a physical effect on the theater audience. Rather than to use random low-frequency noise or some other low-frequency source which is unrelated to the audible sound program, the low-frequency program is derived by shifting down in frequency a selected portion of the audible sound program. The final low-frequency program contains frequency components below 40 Hz, at least 50% of the total energy of which is derived from the shifted-down audible program. By so harmonically relating the audible and low-frequency programs, the audio/visual and vibrational sensations are perceived in a less disjointed fashion.

Abstract: A special effects system for simulating physical sensations in an audience during the presentation of a motion picture. Relatively high intensity, very low frequency random noise is acoustically coupled to a theater space to produce psychological and physiological sensations, much as earthquake movements, in the audience. The special effects are controlled by a control sub-channel which is either frequency multiplexed onto a conventional optical audio track or, in a magnetic stripe film format, the control sub-channel is placed on an accompanying optical track. The presence and amplitude of two control frequencies in the sub-channel are detected and logically combined, providing four separate digital function control signals and two analog control signals which are variable in amplitude.

Abstract: A special effects system for simulating physical sensations in an audience during the presentation of a motion picture. Relatively high intensity, very low frequency random noise is acoustically coupled to a theater space to produce psychological and physiological sensations, much as earthquake movements, in the audience. The special effects are controlled by a control sub-channel which is either frequency multiplexed onto a conventional optical audio track or, in a magnetic stripe film format, the control sub-channel is placed on an accompanying optical track. The presence and amplitude of two control frequencies in the sub-channel are detected and logically combined, providing four separate digital function control signals and two analog control signals which are variable in amplitude.