Apparatus for scanning variable area optical sound tracks

Details Apparatus for scanning variable area optical sound tracks Apparatus for scanning variable area optical sound tracks

G - Physics

11

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G11B 7/00 (2006.01) G01B 11/02 (2006.01) G11B 7/003 (2006.01) G11B 20/24 (2006.01) G11B 23/00 (2006.01)

Patent

CA 1124402

ABSTRACT Apparatus for scanning variable area optical sound tracks wherein a plurality of discrete photo sensors examine small fractional portions of the sound track width. Selection of the number of sensors in relation to photographic grain dimensions results in converting annoying quantizing noise to more tolerable random noise while using a practical number of sensors. Electronic processing of the sensors' outputs reduces impulse noise from dirt and scratches.

304524

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