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    • 5. 发明授权
    • Method for reproducing data and an apparatus for recording and reproducing data
    • 用于再现数据的方法和用于记录和再现数据的装置
    • US07457215B2
    • 2008-11-25
    • US10929892
    • 2004-08-30
    • Masashi KuwaharaTakayuki ShimaJunji TominagaTakashi KikukawaNarutoshi FukuzawaTatsuhiro Kobayashi
    • Masashi KuwaharaTakayuki ShimaJunji TominagaTakashi KikukawaNarutoshi FukuzawaTatsuhiro Kobayashi
    • G11B7/00
    • G11B19/26G11B7/005G11B7/1267G11B7/24
    • A method for reproducing data according to the present invention is adapted for reproducing data recorded in an optical recording disc including a multi-layered body formed by forming a decomposition reaction layer containing noble metal oxide as a primary component and a light absorption layer so as to sandwich a dielectric layer therebetween by irradiating a laser beam onto the optical recording disc and forming a recording mark train including at least one of a recording mark having a length shorter than a resolution limit and a blank region having a length shorter than the resolution limit therein, and is constituted by changing the read power Pr of the laser beam in accordance with a readout linear velocity at which data are to be reproduced from the optical recording disc. According to the thus constituted method for reproducing data, even in the case where the length of a recording mark or the length of a blank region between neighboring recording marks is shorter than the resolution limit, it is possible to record and reproduce a recording mark train including these recording marks and the blank regions. Therefore, this method can be applied to an optical recording medium whose storage capacity is markedly increased.
    • 根据本发明的再现数据的方法适用于再现记录在包括通过形成含有贵金属氧化物作为主要成分的分解反应层和光吸收层而形成的多层体的光学记录盘中的数据,以便 通过将激光束照射到光学记录盘上并形成包括长度小于分辨率极限的记录标记和长度小于分辨率极限的空白区域中的至少一个的记录标记列,夹在其间的电介质层 并且通过根据从光记录盘再现数据的读出线速度来改变激光束的读取功率Pr构成。 根据这样构成的再现数据的方法,即使在记录标记的长度或相邻记录标记之间的空白区域的长度短于分辨率极限的情况下,也可以记录和再现记录标记列 包括这些记录标记和空白区域。 因此,该方法可以应用于存储容量明显增加的光记录介质。
    • 7. 发明申请
    • Method for determining a reproducing power of a laser beam and an apparatus for recording and reproducing data
    • 用于确定激光束的再现功率的方法和用于记录和再现数据的装置
    • US20050105418A1
    • 2005-05-19
    • US10929894
    • 2004-08-30
    • Masashi KuwaharaTakayuki ShimaJunji TominagaTakashi KikukawaNarutoshi FukuzawaTatsuhiro Kobayashi
    • Masashi KuwaharaTakayuki ShimaJunji TominagaTakashi KikukawaNarutoshi FukuzawaTatsuhiro Kobayashi
    • G11B7/243G03G5/05G11B5/09G11B7/00G11B7/0045G11B7/005G11B7/125G11B7/24
    • G11B7/24G03G5/0564G11B7/00456G11B7/1267
    • A method for determining a read power of a laser beam according to the present invention includes a step of setting a power of a laser beam to a recommended recording power Pw′ and forming a recording mark train including at least one of a recording mark having a length shorter than a resolution limit and a blank region having a length shorter than the resolution limit in an optical recording disc, thereby recording test data therein, a step of setting the power of the laser beam to a recommended read power Pr′ and reproducing the test data recorded in the optical recording disc, a step of judging whether or not signal characteristics of a reproduced signal obtained by reproducing the test data satisfies reference conditions, and determining an optimum read power of the laser beam based on the result of the judgment. According to the thus constituted method for determining a read power of a laser beam, even in the case where the length of a recording mark or the length of a blank region between neighboring recording marks is shorter than the resolution limit, it is possible to record and reproduce a recording mark train including these recording marks and blank regions. Therefore, this method can be applied to an optical recording medium whose storage capacity is markedly increased.
    • 根据本发明的用于确定激光束的读取功率的方法包括将激光束的功率设置为推荐的记录功率Pw'并形成记录标记列的步骤,该记录标记列包括具有 长度短于分辨率极限,并且具有长度短于光学记录盘中的分辨率极限的空白区域,从而在其中记录测试数据,将激光束的功率设置为推荐读取功率Pr'并再现 记录在光学记录盘中的测试数据,判断通过再现测试数据获得的再现信号的信号特性是否满足参考条件,并且基于判断结果确定激光束的最佳读取功率的步骤。 根据如此构成的确定激光束的读取功率的方法,即使在记录标记的长度或相邻记录标记之间的空白区域的长度短于分辨率限制的情况下,也可以记录 并且再现包括这些记录标记和空白区域的记录标记列。 因此,该方法可以应用于存储容量明显增加的光记录介质。
    • 8. 发明申请
    • Method for reproducing data and an apparatus for recording and reproducing data
    • 用于再现数据的方法和用于记录和再现数据的装置
    • US20050117478A1
    • 2005-06-02
    • US10929892
    • 2004-08-30
    • Masashi KuwaharaTakayuki ShimaJunji TominagaTakashi KikukawaNarutoshi FukuzawaTatsuhiro Kobayashi
    • Masashi KuwaharaTakayuki ShimaJunji TominagaTakashi KikukawaNarutoshi FukuzawaTatsuhiro Kobayashi
    • G11B7/243G11B5/09G11B7/005G11B7/125G11B7/24G11B19/26
    • G11B19/26G11B7/005G11B7/1267G11B7/24
    • A method for reproducing data according to the present invention is adapted for reproducing data recorded in an optical recording disc including a multi-layered body formed by forming a decomposition reaction layer containing noble metal oxide as a primary component and a light absorption layer so as to sandwich a dielectric layer therebetween by irradiating a laser beam onto the optical recording disc and forming a recording mark train including at least one of a recording mark having a length shorter than a resolution limit and a blank region having a length shorter than the resolution limit therein, and is constituted by changing the read power Pr of the laser beam in accordance with a readout linear velocity at which data are to be reproduced from the optical recording disc. According to the thus constituted method for reproducing data, even in the case where the length of a recording mark or the length of a blank region between neighboring recording marks is shorter than the resolution limit, it is possible to record and reproduce a recording mark train including these recording marks and the blank regions. Therefore, this method can be applied to an optical recording medium whose storage capacity is markedly increased.
    • 根据本发明的再现数据的方法适用于再现记录在包括通过形成含有贵金属氧化物作为主要成分的分解反应层和光吸收层而形成的多层体的光学记录盘中的数据,以便 通过将激光束照射到光学记录盘上并形成包括长度小于分辨率极限的记录标记和长度小于分辨率极限的空白区域中的至少一个的记录标记列,夹在其间的电介质层 并且通过根据从光记录盘再现数据的读出线速度来改变激光束的读取功率Pr构成。 根据这样构成的再现数据的方法,即使在记录标记的长度或相邻记录标记之间的空白区域的长度比分辨率极限短的情况下,也可以记录和再现记录标记列 包括这些记录标记和空白区域。 因此,该方法可以应用于存储容量明显增加的光记录介质。