Optics: motion pictures – With sound accompaniment – Sound allocation
Patent
1974-11-07
1977-06-28
Adams, Russell E.
Optics: motion pictures
With sound accompaniment
Sound allocation
352 26, 352 27, 360 3, 360 67, G03B 3102
Patent
active
040322246
ABSTRACT:
A sound recording and reproducing system comprising a motion picture camera in which there is a synchronization system for recording segments of sound from a signal produced by a microphone associated with the camera as analog samples alternatively read into each of two analog shift registers in increments of samples corresponding to one frame time of the taking picture cycle. Means are provided for recording each such approximately timed sample sequence onto the film adjacent the frame being photographed during pulldown of the film in the camera. For playback, a projector is provided which comprises two analog shift registers each alternatively used for taking the samples recorded on the film for each frame for storage during pulldown, and then to transmit the stored samples through a filter to a loud-speaker for reproduction at a continuous rate during projection of the photographic images recorded on the film.
REFERENCES:
patent: 2480162 (1949-08-01), Rath
patent: 3508817 (1970-04-01), Hnilicka, Jr.
patent: 3832045 (1974-08-01), Wilson et al.
patent: 3932032 (1976-01-01), Weinstein
Adams Russell E.
Ericson John W.
Polaroid Corporation
Roman Edward S.
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