Digital imaging of optical film soundtracks

Details Digital imaging of optical film soundtracks Digital imaging of optical film soundtracks

2008-07-22

2008-07-22

Fuller, Rodney E (Department: 2862)

Optics: motion pictures

With sound accompaniment

Sound allocation

C352S026000

Reexamination Certificate

active

07403258

ABSTRACT:
An apparatus for playback of an analog optical sound track on a film includes a transport for transporting the film past a scanner that generates a digital image signal representative of the analog optical sound track. The digital signal represents the optical signal as gray scale values with a range of greater than one bit. A processor processes the digital image signal for displaying and assessing a result while adjusting a threshold that determines the representation of gray scale values with one bit of resolution.

REFERENCES:
patent: 197 29 201 (1998-08-01), None
patent: 197 33 528 (1999-01-01), None
patent: 1091573 (2001-04-01), None
Richter D. et al., “Restoration of Optical Variable Density Sound Tracks on Motion Picture Films by Digital Image Processing”, Optim. Proceedings of the International Conference on Optimization of Electrical and Electronic Equipments, XX, XX, vol. 3, May 11, 2000, pp. 793-798, XP008002764.

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