Apparatus and method for verification of data established on a r

Details Apparatus and method for verification of data established on a r Apparatus and method for verification of data established on a r

1989-10-27

1992-08-25

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 54, 369 58, 369 59, 360 53, G11B 700

Patent

active

051425149

ABSTRACT:
The present invention provide an apparatus and method for verifying that a record carrier has been transformed from a first state to a second state in accordance with the state of a binary information signal being recorded thereon. In operation, the apparatus detects the signal generated by the record carrier during the supposed transformation and compares this signal to the corresponding portion of the binary information signal to determine whether or not the transformation has taken place, i.e., verifies the transformation. The present invention, in one embodiment, is employed in an optical disk system.

REFERENCES:
patent: 4363116 (1982-12-01), Kleuters et al.

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