Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1993-08-09
1995-01-24
Pascal, Robert J.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 47, G11B 1722
Patent
active
053847598
ABSTRACT:
A method of reading recorded-data on a spiral data track of a rotating recording medium which is scanned by a radially moveable scanning device. The scanning device follows the spiral data track and appears to shift from one track to another. The directory data are divided into a plurality of directory data blocks and stored on the spiral data track. Each of the data blocks represents a different characteristic of the recorded-data and at least n+1 identical blocks for each characteristic are sequentially arranged on the spiral data track, n being a whole number. The directory data are read by moving the scanning device from one data block to another. The motion between data blocks occurs either along the same track, inwardly from one track to another, or outwardly from one track to another and therefore the scanning of all n+1 blocks for every characteristic is not necessary.
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Patent Abstract of Japan vol. 8 No. 228 (P0308) Jun. 21, 1984.
Deutsche Thomson-Brandt GmbH
Dinh Tan
Herrmann Eric P.
Kurdyla Ronald H.
Pascal Robert J.
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