Abstract Apparatus is described for processing motion picture film and audio sound data recorded on standard sprocketless magnetic tape. A tape synchronizing system is used in which the film is driven by a stepper motor which, in turn, is controlled by synchronizing pulses recorded on tracks of the audio tape. The film can be driven in forward and reverse directions at various speeds, with exact synchronization being maintained between the film and tape during editing. After the sound tracks have been recorded and assembled on their respective tapes, they can be mixed under the control of conductive strips placed on the film which, through a special programming unit, control the starting and stopping of the various tapes.
Inventors
👤 H Harris
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-07 11:00
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
Motion picture editing and processing apparatus, comprising means for driving a motion picture film medium in preselected increments, a tape deck containing a magnetic tape medium having audio data recorded thereon, said magnetic tape medium having a synchronizing track including trains of forward and reverse sync-driving pulses recorded therein, variable speed drive means for driving said magnetic tape in forward and reverse directions, means for viewing the frames of said motion picture film, and means responsive to said sync-driving pulses for driving said film medium in forward and reverse directions depending upon the direction of movement of said magnetic tape, said filmdriving means being responsive to the frequency of occurrence of said data pulses as determined by the rate of movement of said magnetic tape.
Claim 2
Dependent Claim
125 words
Motion picture editing and processing apparatus, comprising means for driving a motion picture film medium in preselected increments, a tape deck containing a magnetic tape medium having audio data recorded thereon, said magnetic tape medium having a synchronizing track including trains of forward and reverse sync-driving pulses recorded therein, variable speed drive means for driving said magnetic tape in forward and reverse directions, means for viewing the frames of said motion picture film, and means responsive to said sync-driving pulses for driving said film medium in forward and reverse directions depending upon the direction of movement of said magnetic tape, said filmdriving means being responsive to the frequency of occurrence of said data pulses as determined by the rate of movement of said magnetic tape.
Claim 3
Dependent Claim
46 words
Apparatus according to claim 1, further including self-resolving means for synchronizing said tape medium with respect to a preselected line frequency, said self-resolving means including means for comparing the frequency of occurrence of said sync-driving pulses derived from said synchronizing track with said preselected line frequency.