Modulated sound reading system

Details Modulated sound reading system Modulated sound reading system

1975-12-19

1978-04-18

Konick, Bernard

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

1791003Z, 17910031, 1791003GN, 250552, 352 27, G11B 700

Patent

active

040852962

ABSTRACT:
A motion picture sound reading system employing a light emitting diode source which is modulated at a carrier frequency several times higher than the highest sound-track frequency for exciting the optical sound track and a carrier-demodulation signal processing system for deriving a high-quality audio signal from the photoelectrically detected optical sound track.

REFERENCES:
patent: RE27930 (1974-02-01), House
patent: 2082846 (1937-06-01), Otis
patent: 2497952 (1950-02-01), Maurer
patent: 2664470 (1953-12-01), Gillette
patent: 3396344 (1968-08-01), Broom
patent: 3619516 (1971-11-01), Miller
patent: 3941945 (1976-03-01), Borner
"Film Scan System Using a Semiconductor Light Source and Light Detector" by Spitzak; Feb., 1966 Journal of the SMPTE; vol. 75, pp. 103-105.
The Radio Amateur's Handbook; 1971; pp. 94-96, 131-134.

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