Method and apparatus for controlling renewal of data in optical

Details Method and apparatus for controlling renewal of data in optical Method and apparatus for controlling renewal of data in optical

1986-07-22

1988-11-29

Shoop, Jr., William M.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 30, 369111, 360 77, G11B 700

Patent

active

047886722

ABSTRACT:
In case of rewriting data by means of an erasable optical disc memory recording new data after having erased a series of data already stored, directory data written in an optical disc memory in order to control the written data are transferred to an external directory memory and write-in and read-out are controlled by using the directory memory. For rewriting data, which have been already recorded and which are recorded under a specified file name, the data are not erased and renewed data are written in another recording region, where recording is possible. The data, which have become unnecessary as the result of renewal, are erased during a period of time, when the optical disc memory is not accessed.

REFERENCES:
patent: 4229808 (1980-10-01), Hui
patent: 4495474 (1985-01-01), Nishikawa et al.
patent: 4545044 (1985-10-01), Satoh et al.
patent: 4677606 (1987-06-01), Ogata et al.
patent: 4682318 (1987-07-01), Busby

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