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    • 51. 发明授权
    • Method and apparatus of determining a recording condition for optical disc
    • 确定光盘记录条件的方法和装置
    • US08072857B2
    • 2011-12-06
    • US12276669
    • 2008-11-24
    • Shigeru Furumiya
    • Shigeru Furumiya
    • G11B7/00
    • G11B7/00736G11B7/1267
    • An optical disc writing condition determining method according to the present invention includes the steps of: performing a first test write operation at a low speed on an inner test track; setting condition A for performing a write operation at the low speed on the inner test track based on a result of the first test write operation; performing a second test write operation at the low speed on an outer test track; setting condition B for performing a write operation at the low speed on the outer test track based on a result of the second test write operation; performing a third test write operation at a high speed on the outer test track; setting condition C for performing a write operation at the high speed on the outer test track based on a result of the third test write operation; and calculating either a difference between the conditions A and B or a ratio of the condition B to the condition A and modifying the condition C based on the difference or the ratio, thereby determining writing condition D for performing a write operation at the high speed on user data tracks.
    • 根据本发明的光盘写入条件确定方法包括以下步骤:在内部测试轨道上执行低速的第一测试写入操作; 设置条件A,用于基于第一测试写入操作的结果在内部测试轨道上执行低速的写入操作; 在外部测试轨道上以低速执行第二测试写入操作; 设置条件B,用于基于第二测试写入操作的结果在外部测试轨道上执行低速写入操作; 在外部测试轨道上高速执行第三次测试写入操作; 设置条件C,用于基于第三测试写入操作的结果在外部测试轨道上执行高速写入操作; 并且计算条件A和B之间的差异或条件B与条件A的比率,并且基于差或比率来修改条件C,从而确定用于执行高速写入操作的写入条件D 用户数据轨道。
    • 52. 发明授权
    • Method and apparatus for writing data on storage medium
    • 在存储介质上写入数据的方法和装置
    • US07961581B2
    • 2011-06-14
    • US12479917
    • 2009-06-08
    • Atsushi NakamuraShigeru Furumiya
    • Atsushi NakamuraShigeru Furumiya
    • G11B7/00
    • G11B7/0062
    • A data recording method according to the present invention is a method for recording data as edge position information, including marks and spaces of multiple different lengths, on a storage medium by irradiating the storage medium with a pulsed energy beam. The method includes the steps of: (A) generating a write code sequence based on the data to be recorded; (B) determining a write pulse waveform, defining the power modulation of the energy beam, according to the code lengths of respective codes included in the write code sequence; and (C) modulating the power of the energy beam based on the write pulse waveform. If the shortest code length of the write code sequence is n (which is an integer equal to or greater than one), a write pulse waveform that has only one write pulse is assigned to recording mark making periods corresponding to codes with code lengths x of n, n+1 and n+2, and a write pulse waveform that has multiple write pulses Pw is assigned to recording mark making periods corresponding to codes with code lengths x of n+3 or more.
    • 根据本发明的数据记录方法是通过用脉冲能量束照射存储介质,将数据作为边缘位置信息(包括多个不同长度的标记和间隔)记录在存储介质上的方法。 该方法包括以下步骤:(A)基于要记录的数据生成写代码序列; (B)根据包含在写代码序列中的各个代码的码长,确定写入脉冲波形,定义能量束的功率调制; 和(C)基于写入脉冲波形调制能量束的功率。 如果写代码序列的最短代码长度为n(其为等于或大于1的整数),则仅具有一个写入脉冲的写入脉冲波形被分配给与代码长度为x的代码相对应的记录标记制作周期 n,n + 1和n + 2,并且具有多个写入脉冲Pw的写入脉冲波形被分配给与代码长度为x + 3或更大的代码相对应的记录标记制作周期。
    • 53. 发明申请
    • OPTICAL RECORDING METHOD, OPTICAL RECORDING DEVICE, MASTER MEDIUM EXPOSURE DEVICE, OPTICAL INFORMATION RECORDING MEDIUM, AND REPRODUCING METHOD
    • 光学记录方法,光学记录装置,主介质曝光装置,光学信息记录介质和再现方法
    • US20110044143A1
    • 2011-02-24
    • US12916035
    • 2010-10-29
    • Atsushi NakamuraIsao KobayashiShigeru Furumiya
    • Atsushi NakamuraIsao KobayashiShigeru Furumiya
    • G11B20/00
    • G11B7/0062G11B7/261G11B20/10009G11B20/10046G11B20/10055G11B2007/0013
    • An optical recording method for recording information by irradiating an optical disc medium with a modulated write pulse train of laser light variable over a plurality of power levels such that a plurality of marks are formed on the optical disc medium, edge positions of each of the marks and a space between adjacent two of the marks being utilized for recording of the information. The optical recording method includes the steps of: encoding record data to generate encoded data which is a combination of marks and spaces; classifying the encoded data according to a combination of a mark length of the mark, a space length of a first space that immediately precedes the mark, and a space length of a second space that immediately succeeds the mark; generating a write pulse train for forming the mark, in which at least one of a leading end edge position, a trailing end edge position and a pulse width of the write pulse train is changed according to a classification result; and irradiating the optical disc medium with the write pulse train generated to form the plurality of marks on the optical disc medium.
    • 一种光记录方法,用于通过在光盘介质上形成多个标记的激光的调制写入脉冲序列对光盘介质进行照射来记录信息,使得在光盘介质上形成多个标记,每个标记的边缘位置 并且相邻两个标记之间的空间用于记录信息。 光记录方法包括以下步骤:编码记录数据以生成作为标记和空格的组合的编码数据; 根据标记的标记长度,紧接在标记之前的第一空格的空格长度和紧接着标记的第二空格的间隔长度的组合对编码数据进行分类; 产生用于形成标记的写脉冲串,其中根据分类结果改变写入脉冲串的前端边缘位置,后端边缘位置和脉冲宽度中的至少一个; 以及在光盘介质上照射生成的写入脉冲串,以在光盘介质上形成多个标记。
    • 54. 发明申请
    • OPTICAL DISC DRIVE APPARATUS AND OPTICAL DISC REPRODUCTION METHOD USING THE SAME
    • 光盘驱动装置和使用该光盘的光盘再现方法
    • US20100172230A1
    • 2010-07-08
    • US12089172
    • 2006-10-04
    • Shigeru Furumiya
    • Shigeru Furumiya
    • G11B7/00
    • G11B7/126G11B7/005
    • An optical disc drive apparatus (100) of the present invention rotates an optical disc (1) at a predetermined rotation speed using a motor (2). An optical pickup (3) irradiates the optical disc (1) with a laser beam (5) emitted from its internal semiconductor laser (4), and obtains a reproduction signal (7) based on a laser beam reflected from the optical disc (1). A laser driving unit (8) controls a driving current (9) of the semiconductor laser (4) to a predetermined level, and superimposes a high-frequency current (11) having a predetermined level on the driving current (9). In a high-speed reproduction mode, a control unit (12) sets the rotation speed of the optical disc (1) higher, the power of the laser beam (5) irradiating the optical disc (1) higher, and the level of the high-frequency current (11) lower than in a normal reproduction mode.
    • 本发明的光盘驱动装置(100)使用马达(2)以预定转速使光盘(1)旋转。 光拾取器(3)利用从其内部半导体激光器(4)发射的激光束(5)照射光盘,并且基于从光盘(1)反射的激光束获得再现信号(7) )。 激光驱动单元(8)将半导体激光器(4)的驱动电流(9)控制到预定电平,并将具有预定电平的高频电流(11)叠加在驱动电流(9)上。 在高速再现模式中,控制单元(12)将光盘(1)的旋转速度设置得更高,激光束(5)照射光盘(1)的功率更高, 高频电流(11)低于正常再现模式。