Information recording method and information recording device

Abstract

Regarding the relationship between the number of pulses and the data length, in the data length groups with different data length groups, each data length group records according to the rules of recording waveforms of different pulse widths and pulse edge positions, and finds the optimal pulse width and pulse edge position. value, and can thus perform high-precision recording. Even for data with different regularities of recording waveforms corresponding to n types of data length groups, optimum recording powers ( S1 to S3 ) of the test data are calculated by the first trial writing process, and based on the The second trial writing process calculates the optimum pulse width or the optimum pulse edge position for each data length group (S4 to S6), and performs recording based on the optimum recording power or optimum recording waveform calculated by these trial writing processes operation, the entire data length can be formed with high accuracy, and a good reproduced signal can be obtained.

Description

technical field [0001] The present invention relates to an information recording method for various recording media such as CD-R, CD-RW, DVD-R, DVD-RW, DVD-RAM, and DVD+RW, an information recording device, and a recording medium for recording a program. Background technique [0002] In recent years, for example, recordable optical disk drives such as CD-R drives have been put into practical use, and studies aimed at increasing the capacity and recording at a higher speed have been conducted. Examples of recordable optical disc media include write-once optical discs using dye-based media, etc., rewritable discs using magneto-optical media, phase change media, and the like. [0003] In a general optical disk recording device, a semiconductor laser is used as a light source, and the laser light pulse-modulated according to recording information is irradiated onto a recording medium to form a recording mark. At this time, since the power of the laser light for recording changes...

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Problems solved by technology

[0010] However, in such an OPC method, since the relationship between the recording power and the deviation from the ideal value of each of the data lengths is determined by the rapid cooling (rapid cooling) conditions by the arrangement of the heating pulse and the cooling pulse, according to the even length and the count The data length of the length varies from group to group, so different optimal recording powers are calculated from the combination of the preset pulse width and pulse edge position in the low-level format (pre-format) information of the disc and the preset recording power. In the case of the mark length and the deviation from the ideal value increases

More specifically, in the case of recording medium and recording device deviation (that is, deviation of the recording pulse waveform caused by the deviation of the LD driver), the optimum recording power Po (optimum) and the pulse of the recording pulse The relationship between the width and the optimum value of the pulse edge position also deviates, so the accuracy of the mark shape and mark position is deteriorated, and the jitter characteristics are deteriorated, resulting in problems that cause data errors

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