Information recording method and medium having optimum...

Details Information recording method and medium having optimum... Information recording method and medium having optimum...

2007-03-13

2007-03-13

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S053270

Reexamination Certificate

active

10810568

ABSTRACT:
An information-recording method and an information-recording medium which make it possible to improve overwrite characteristics in the high speed recording, especially archival overwrite characteristics for overwriting information after retaining the medium in a high temperature environment for a certain period of time, and an information-recording apparatus based on the use of the same are provided. The information-recording method comprises overwriting a random pattern with light beams having a predetermined recording power and a variety of erasing powers; reproducing the random pattern to determine a minimum value Pb1and a maximum value Pb2of the erasing power obtained when the pattern, in which a reproduction jitter exceeds a predetermined threshold value, is erased; determining an optimum erasing power Pb from the minimum value Pb1, the maximum value Pb2, and a relational expression represented by Pb=α×Pb1+(1−α)×Pb2; and recording the information with the determined optimum erasing power Pb. The value of α is previously recorded on the information-recording medium. The information-recording apparatus has a Pb-calculating control unit which reads the value of α when the optimum erasing power Pb is determined.

REFERENCES:
patent: 5905695 (1999-05-01), Kimura
patent: 6956810 (2005-10-01), Noda
patent: A 8-7343 (1996-01-01), None
patent: A-09-282661 (1997-10-01), None
patent: A-10-188286 (1998-07-01), None

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