FIELD: invention refers to systems and processes of recording and reproduction of phonograms on movie films. SUBSTANCE: time code is printed in digital form in area of movie film between analog optical phonogram and gate masks which is exposed together with phonogram when printing is performed. This area is partially developed anew and is usually reserved for separation of analog phonogram from gate masks. Sound in digital form for movie film is kept in storage of archives digital data having large capacity and density. Time codes corresponding to known positions on film are read as film is reproduced and sound signals in digital form for these gate masks are transmitted under waiting mode into buffer storage of data of quick access where these data are stored for time being before they are converted to analog format for reproduction in movie theater. Time code is read with the aid of light which is absorbed by pigments of film produced during its processing. Temporary keeping of sound signal in digital form in buffer storage is used during rupture of film, change of projector and in various circuits acknowledging authenticity of time code. EFFECT: invention makes it possible to keep sound data in digital form and to be aid for reliable storage of data of relatively slow access, for instance, magnetic tape with information in digital form. 10 cl, 7 dwg
Authors
Dates
1997-08-27—Published
1991-09-26—Filed