Apparatus for rapidly accessing a large data base employing an o

Details Apparatus for rapidly accessing a large data base employing an o Apparatus for rapidly accessing a large data base employing an o

1987-07-31

1989-10-03

Faber, Alan

Registers

Systems controlled by data bearing records

235432, 369 32, 369 34, 369 44, 369 54, 369 58, 360 7814, 360 722, G06F 1540, G11B 2719

Patent

active

048719030

ABSTRACT:
An OCR reads the name and address on sequentially conveyed mail. An index number is derived for each name and address for correlating that name and address to r-.theta. coordinates of file tracks on a CD-ROM disc which is rotated at constant velocity. The index number is derived from the read address to identify the CD-ROM disc containing the desired data and the track containing a nine or eleven-digit zip code for that read address. Four read heads on each of multiple CD-ROM players are used to access the data based on head availability. The read head controllers have updated r-.theta. and clocking data for accurately locating a track regardless disc manufacturing and thermal variations and for reading data from any track at substantially the same data rate. A bar code containing a nine or eleven digit zip code, as applicable, is printed on the read letter for later automatic sorting by zip code.

REFERENCES:
patent: 3774172 (1973-11-01), Silverman
patent: 4270154 (1981-05-01), Crawford
patent: 4414590 (1983-11-01), Merdian, Jr. et al.
patent: 4423448 (1983-12-01), Frandsen
patent: 4481412 (1984-11-01), Fields
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patent: 4578759 (1986-03-01), Horil
patent: 4641753 (1987-02-01), Tamada
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patent: 4646278 (1987-02-01), Okano
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patent: 4745587 (1988-05-01), Maeda et al.
J. P. Roth ed. "Essential Guide to CD-ROM", Meckler Publishing, 1986 pp. vii-viii, 1-2, 4-11, 17-19, 21-23, 38, 39, 42-46 and 50-51.

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