Data recording and reproducing method

Details Data recording and reproducing method Data recording and reproducing method

1984-08-15

1987-06-30

Canney, Vincent P.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 48, G11B 1552, H04N 576

Patent

active

046776060

ABSTRACT:
A data recording/reproducing method for a non-rewritable recording medium of a rotating type, each of tracks on the recording medium is divided into a plurality of blocks which are allotted with respective addresses. Each block includes a data recording area and a deletion flag area which is divided into a plurality of sub-areas. One of the sub-areas in a given block is associated with other block which is in a predetermined address relation with the given block. When the content in the data recording area of one block on the recording medium is to be rendered invalid, deletion flag information is also recorded in the sub-area of the other block having the predetermined address relation with the one block. Upon reading, the data of the blocks read out from the recording medium exclusive of the data of the block determined to be invalid on the basis of the flag information is transferred to a high-rank system.

REFERENCES:
patent: 4308612 (1981-12-01), Miyauchi et al.
patent: 4433403 (1984-02-01), Baba et al.

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