Phase-change optical disc recording method and apparatus, and in

Details Phase-change optical disc recording method and apparatus, and in Phase-change optical disc recording method and apparatus, and in

1997-03-05

1998-04-28

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369116, 369 54, 369 47, G11B 700

Patent

active

057454639

ABSTRACT:
A trial writing operation is performed on a phase-change optical disc using write and erase light-emitting powers, which together are varied according to predetermined variation ratios respectively. Signals relevant to said trial writing operation are reproduced from said disc. Optimum ones of the write and erase light-emitting powers are determined using the thus-reproduced signals. The predetermined variation ratios for the write and erase light-emitting powers may be the same as each other. Alternatively, the trial writing operation may be performed on a phase-change optical disc using write and erase light-emitting powers which are individually varied according to predetermined variation ratios respectively.

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Kayanuma, et al., "High Track Density Magneto-Optical Recording Using a Crosstalk Canceler", Proceeding of Optical Data Storage '90, pp. 18-21, 1990.

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