Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1974-12-06
1976-06-08
Konick, Bernard
Facsimile and static presentation processing
Static presentation processing
Attribute control
178 66R, 178 67A, 1791003V, H04N 584, G11B 700
Patent
active
039627217
ABSTRACT:
An apparatus for reading a disc-shaped record carrier on which signals are recorded in parallel tracks in optically coded form. The signal is read with the aid of a beam of radiation, which after interaction with the record carrier impinges on two detectors offset with respect to each other in a direction parallel to the image of the track direction of the record carrier. A first combination circuit supplies the difference of the output signals of said read detectors to a first signal processing channel, which processes the part of comparatively high frequency of the frequency spectrum of the recorded signal. A second combination signal supplies the sum of the output signals of said read detectors to a second processing channel, which processes the part of comparatively low frequency of the frequency spectrum of the recorded signal.
REFERENCES:
patent: 3207904 (1965-09-01), Heinz
patent: 3634689 (1972-01-01), Ejiri
patent: 3657547 (1972-04-01), Mansfield
patent: 3679307 (1972-07-01), Zoot
patent: 3854015 (1974-12-01), Janssen
"Signal Processing in the Philips `VLP ` System" By W. den Bussche et al., Philips Tech. Rev. 33, pp. 181-185, 1973, No. 7.
"An Experimental Optical Videodisc Playback System" By G. Hrbek, Journal of the SMPTE, vol. 83, July 1974.
Cohen Simon L.
Faber Alan
Konick Bernard
Trifari Frank R.
U.S. Philips Corporation
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