IMPROVEMENTS IN APPARATUS FOR REPRODUCING MOTION PICTURE FILM PHOTOGRAPHIC SOUND-TRACKS TO CORRECT REPRODUCTION ERRORS AND REDUCE NOISE

摘要

IMPROVEMENTS IN APPARATUS FOR REPRODUCINGMOTION PICTURE FILM PHOTOGRAPHIC SOUND-TRACKSTO CORRECT REPRODUCTION ERRORS AND REDUCE NOISEAbstract of the DisclosureApparatus for reproducing motion picture photo-graphic (optical) sound tracks is disclosed in whichsignificant information regarding track placement, slitillumination, azimuth and impulse noise is derived bydynamically processing and comparing the signals ob-tained by reading each half of a bilateral sound-track.In a further embodiment a pair of detector elements mon-itors the septum between two tracks in order to detectlateral film misalignment.