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    • 4. 发明公开
    • Optical disk, method for manufacturing the same, and method for recording and method for reproducing data using optical disk
    • 光盘中,其制备方法,以及用于记录和再现数据的方法
    • EP1492098A2
    • 2004-12-29
    • EP04253839.7
    • 2004-06-25
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Miyagawa, NaoyasuIto, Motoshi
    • G11B7/007G11B7/24
    • G11B7/1267G11B7/0045G11B7/00736G11B7/24038G11B2007/0013
    • An optical disk includes a first information recording layer, and second to N-th information recording layers (with N being an integer of two or greater) that are arranged further toward the side from which laser light is irradiated than the first information recording layer and which are arranged in order from the side near the first information recording layer. The first information recording layer includes a read-only control data region (702a), a first recording learning region (704a) for learning recording parameters to record data, and a first user data recording region (708a) for recording user data. When taking at least one of the second to N-th information recording layers as an i-th information recording layer (with i being an integer satisfying 2 ≦ i ≦ N), that i-th information recording layer includes an i-th recording learning region (702b, 702c and 702d) for learning recording parameters to record data in the i-th information recording layer, and an i-th user data recording region for recording user data. The first recording learning region and the i-th recording learning region are arranged at different radial positions, and the i-th recording learning region is arranged within a region of radial positions at which the control data region is provided.
    • 该盘具有在朝向从该激光比另一个层(103)照射的侧布置的信息记录层。 层(103)具有用于学习记录参数,以在所述层(103)的数据记录学习区域。 记录学习区域和所述第i个记录学习区域在径向位置,其中第i个区域在其上提供一个控制数据区域的区域排列布置。 因此独立权利要求中包括了以下内容:(a)以从光盘(C)再现数据的再现方法的一个一侧照射激光,制造光盘(b)中的磁道的记录数据的记录方法的方法 通过从光盘的一侧照射激光,记录在磁迹。
    • 10. 发明公开
    • Optical disc reproducing apparatus
    • Wiedergabegerätfüroptische Platte。
    • EP0429045A2
    • 1991-05-29
    • EP90122100.2
    • 1990-11-19
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Ito, MotoshiOhara, ShunjiIshibashi, Kenzo
    • G11B7/085G11B20/10G11B7/00
    • G11B7/0941G11B7/08517
    • A detected signal of an optical pickup is (1A) applied to an automatic gain control circuit (AGC circuit) (3) for equalizing the level of the detected signal, the output of the AGC circuit is detected by an envelope detector (4A) and is compared with a reference level by a comparator (404), and the output of the comparator is applied to the AGC circuit as a gate signal for holding the gain of the AGC circuit to a predetermined value during tracing of a nonrecorded part of a track, and additionally, a jump signal (10) which is output in track jump operation of the optical pickup is applied to the AGC circuit to hold the gain to the predetermined value during the track jump operation.
    • 光拾取器的检测信号是(1A)应用于用于均衡检测信号电平的自动增益控制电路(AGC电路)(3),AGC电路的输出由包络检测器(4A)和 通过比较器(404)与参考电平进行比较,并且比较器的输出被施加到AGC电路作为门信号,用于在跟踪轨迹的非记录部分期间将AGC电路的增益保持在预定值 并且另外,在光学拾取器的磁道跳跃操作中输出的跳跃信号(10)被施加到AGC电路,以在磁道跳转操作期间将增益保持在预定值。