G - Physics – 11 – C
Patent
G - Physics
11
C
352/78, 352/10.4
G11C 27/02 (2006.01) G03B 31/02 (2006.01) G11B 27/02 (2006.01)
Patent
CA 1072210
ABSTRACT An apparatus in the form of a sound-viewer-editor or sound projector and a method are provided for facilitating the editing of a motion picture film bearing a longitudin- ally extending principal stripe on which a sound track is magnetically recorded, such sound track being longitudin- ally offset in a conventional manner relative to the scene images recorded on frames of the film which also bears a second or so-called balance stripe of magnetic material. The apparatus comprises a viewing station such as a pro- jector aperture and first and second electro-magnetic heads for recording on and reproducing sound information from the principal stripe and the balance stripe respectively. Such heads are interconnected through an amplifier and can be used first to reproduce the sound track from the principal stripe and record it on the balance stripe so that it is then in transverse synchronized alignment with the image- carrying frames. After editing of the film, the apparatus can be used to erase the principal sound stripe and to re- produce the edited sound track from the balance stripe of the edited film and to record that edited sound track and additional sound on the principal stripe so that all sound is correctly longitudinally offset. The apparatus also comprises a sound-reproducing head offset with respect to the viewing station (e.g. projection aperture) so as to allow simultaneous viewing (e.g. projection) at that stat- ion of the same images and synchronized reproduction of the related sound information as recorded on the principal stripe of the film for immediately audible projection.
241702
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