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OwnerGabor Erdelyiinventor
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A film with a light-sound track carrying stereophonic sound information and a ribbon light valve for producing the light-sound track, and a light-sound transducer for reproducing the information recorded on the light-sound track. On the film, the sounds of two stereophonic channels are recorded in a single light-sound track in the form of an envelope asymmetric to the longitudinal axis of the light-sound track. The ribbon light valve has a light gate controllable by a ribbon arranged in a magnetic field; to the terminals of the two series-connected ribbons a transformer is connected. To the terminals connected with the transformer, two series-connected resistances are connected and, between the junction of the two resistances and the junction of the two ribbons, a further transformer is connected. The light-sound transducer has two light sensing elements, and electric terminals for tapping separately the signals of the two light sensing elements. On the light-sound track, the stereophonic sound of a compatible recording system can be recorded and the film can be projected with a monosound projecting apparatus.
A film having a light-sound track carrying first and second stereophonic sound information and comprising a film body and along said film body a light sound track carrying stereophonic sound information in a curve with varied width, said curve having two boundries and a center line the width of the curve modulated transversely by said first stereophonic sound information and the center line of the curve being modulated by said second stereophonic sound information, said boundries varying independently of one another to provide said varied width.
A method comprising recording stereophonic sounds, represented by two sound information expressions formed of two sound signals L and R, on a film by forming along said film an asymmetrical light-sound track carrying said two stereophonic sound information expressions in a curve limited by two boundries varying independently of one another to provide a varying width, said curve having a center line, said forming being effected by modulating the boundries of the curve with transverse modulation by one of the expressions of the stereophonic sound and modulating the center line of the curve by the other expression of the stereophonic sound, the one information expression of the stereophonic signals being taken from the sum signal L + R and the other information expression being taken from the difference signal L - R.
A light exposure valve apparatus for the production of a light-sound curve in a light-sound track, a stereophonic signal being recorded on a film by forming along said film a light-sound track carrying two stereophonic sound information expressions in a curve limited by two boundries varying independently of one another to provide a varying width, said curve having a center line the width of the curve being modulated with transverse modulation by one of the expressions of the stereophonic sound and the center line of the curve being longitudinally modulated by the other expression of the stereophonic sound, said apparatus comprising a light gate, series-connected ribbons for controlling said gate, means by which said ribbons are arranged in a magnetic field, said ribbons having a common junction and respective terminals, a first transformer connected to said terminals, two series-connected resistances connected between said terminals and having a common junction, a further transformer connected between the junction of said ribbons and the junction of said resistances, means for feeding an electrical signal representing one of said expressions to said first transformer, and means for feeding an electrical signal representing the other of said expressions to said further transformer.
Dependencies are inferred from the claim text.