Method for optimizing recording pulse condition in data recording to optical information recording medium

Abstract

By using each of three recording pulse conditions, particular recording patterns are continuously recorded onto an optical disc for test and the recording patterns are continuously reproduced. An edge shift amount of a mark corresponding to each of the three recording pulse conditions is measured from each reproduction signal and from the measured value, a correction value of the recording pulse condition is calculated by linear approximation.

Description

technical field [0001] The present invention relates to a method of recording information by irradiating laser light on an optical information recording medium to change its physical properties, and particularly relates to optimization of recording pulse conditions used for the recording. Background technique [0002] As conventional optical information recording media, rewritable optical discs such as DVD-RAM, DVD-RW, and CD-RW are known, for example. In these rewritable optical discs, laser light is used to rewrite information as follows. First, the recording and reproducing apparatus reads recording pulse standard conditions from the calibration area of ​​the optical disc, and sets recording pulse conditions based on the conditions. Second, the recording and reproducing apparatus irradiates laser light with a waveform corresponding to recording pulse conditions to record information on the optical disk. Here, in order to reduce the influence on the recording quality due...

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Problems solved by technology

As a result, since further reduction in the number of rewriting times is difficult, further reduction in learning time is also difficult.

In addition, as described in Patent Document 2, when the maximum similarity decoding method is applied to the optimization of the recording pulse conditions, it is still unknown how to reduce the number of trial writes through its high efficiency.

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