Recording and reproducing method in which data and updating data

Details Recording and reproducing method in which data and updating data Recording and reproducing method in which data and updating data

1993-05-25

1996-01-30

Black, Thomas G.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

3692753, 364DIG1, 3642831, G06F 1730

Patent

active

054887186

ABSTRACT:
A method for recording a plurality of kinds of data to a recording medium such as an optical card or disc having a recording surface on which a plurality of sectors are arranged in accordance with a predetermined order and for reproducing the recorded data is provided. A plurality of blocks each of which includes a plurality of sectors and which correspond to the kinds of data are prepared for the recording surface. One of the plurality of blocks is accessed on the basis of the kind of data. In the accessed block, data is recorded onto at least one sector in accordance with the predetermined order. In the accessed block, updating data is additionally recorded onto at least one sector subsequent to the data recorded sector. In the accessed block, the recorded data is reproduced from at least one of the finally recorded sectors. A plurality of tracks each comprising a plurality of sectors are arranged in parallel on the recording surface of the optical card. The data is recorded and reproduced by scanning the recording surface of the optical card by a light beam. Since there is no need to read out any directory to manage the recording and reproduction of data, the complicated seeking operation of the recording and reproducing head is unnecessary and the accessing time is reduced.

REFERENCES:
patent: 3668647 (1972-06-01), Evangelisti et al.
patent: 4780816 (1988-10-01), Connell
patent: 4953122 (1990-08-01), Williams
patent: 4998009 (1991-03-01), Iijima et al.
patent: 5355481 (1994-10-01), Sluijter

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