Television – Special applications – Film – disc or card scanning
Patent
1997-03-31
2000-07-18
Garber, Wendy
Television
Special applications
Film, disc or card scanning
348100, 348103, H04N 336
Patent
active
060914467
ABSTRACT:
A method and device are disclosed for transferring information from cinema film at a first speed to broadcast quality video signals at a second and different, predetermined speed which may be greater or less than the first speed in a telecine containing a capstan and an internal frame store. The device comprises (1) a mechanism for determining rotational phase and velocity of the capstan, and (2) a servo motor driven at a rate outside the frame store given range, including means to adjust the linear film rate to an integer multiple/submultiple of the framestore pulse rate. The method of the invention comprises the steps of: (1) transporting cinema film at a substantially constant first speed; (2) forwarding optical information signals to the internal frame store, the frame store and pulse operating at a second and pre-determined speed, the telecine having a sprocket and a capstan with a biphase tachometer, providing a signal, and means to measure the phase of the sprocket relative to the frame store pulse, and the rate of the frame store pulse and the rate indicated by the signal from the tachometer have the ratio of two integers; and (3) outputting the information forwarded from the frame store to an external destination, wherein the difference in said first and second speeds causes selected alignment of the cinema film with the optical beam.
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Falk Robert H.
Garber Wendy
Moe Aung S.
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