Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-03-14
1979-02-27
Hecker, Stuart N.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
1791003V, 360 77, 365234, G11B 700
Patent
active
041422090
ABSTRACT:
Apparatus for optically recording and reading information on a disc medium rotating surface. The information is recorded on concentric or spiral tracks continuously or in parts. The information, which can represent, for example, television video, x-ray, or digital data signals, are addressed by codes that identify the track on which the information is recored preceded by the address code. The recording mechanism can record a new track adjacent to the previous track if the disc has been moved between recordings. There are also means for compensating for eccentricity errors introduced by small changes in the radial dimensions of the disc. The spacing between tracks is typically 2.5 microns although the eccentricity errors may exceed the span of ten tracks. Typically, 4,000 tracks per cm can be recorded.
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patent: 3654624 (1972-04-01), Becker et al.
patent: 3796825 (1974-03-01), Redlich et al.
patent: 3881184 (1975-04-01), Koepcke et al.
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patent: 4028733 (1977-06-01), Ulicki
Darrington, "Wireless World Teletext Decoder 1 -- The Background", Wireless World, vol. 81, No. 1479, pp. 498-504, Nov. 1975.
Fink Ronald P.
Hedlund Lee V.
Wright David I.
Hecker Stuart N.
Lazar J. D.
McElheny Donald
RCA Corporation
Tripoli J. S.
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