Recording apparatus and method, and disk producing method

Details Recording apparatus and method, and disk producing method Recording apparatus and method, and disk producing method

2006-02-06

2009-08-25

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Format arrangement processing for auxiliary information

Reexamination Certificate

active

07580335

ABSTRACT:
A sub data recorder to record sub data on an optical-disk recording medium is provided. In one example, a sub data recorder records sub data by forming marks on a reflective layer of an optical-disk recording medium to which main data is recorded as a combination of pits and lands by irradiating laser light having a writing power to the reflective layer, the sub data can be recorded stably. An embodiment provides a recording apparatus to record sub data to an optical-disk recording medium formed from a substrate and at least a reflective layer and cover layer stacked on the substrate and to which main data is to be recorded as a combination of pits and lands formed on the substrate by irradiating laser light having a writing power to the reflective layer to form marks as the sub data on the reflective layer, the apparatus including a read signal generator to generate a read signal by detecting a return part of laser light having a reading power, irradiated to the optical-disk recording medium, a sub data recorder to record the sub data by forming the marks in mark inserting positions on the reflective layer of the optical-disk recording medium, determined in conformity to a predetermined rule, with the laser light being controlled to have the writing power, and a waveform replacing unit to replace a waveform of the read signal generated by the read signal generator, corresponding to a section having a predetermined length and including the mark inserting position, with a replacement waveform whose level has been set.

REFERENCES:
patent: 4975897 (1990-12-01), Tanahashi
patent: 5025434 (1991-06-01), Tateishi et al.
patent: 6414913 (2002-07-01), Kobayashi et al.
patent: 6522612 (2003-02-01), Miyamoto et al.
patent: 7339872 (2008-03-01), Ogura

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