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    • 3. 发明授权
    • Recording/reproducing apparatus and recording/reproducing method
    • 记录/再现装置和记录/再现方法
    • US07057985B1
    • 2006-06-06
    • US09689005
    • 2000-10-12
    • Shoei KobayashiTadaaki Nomoto
    • Shoei KobayashiTadaaki Nomoto
    • G11B11/00H04N5/06
    • H03L7/14G11B7/0053G11B20/10G11B27/24G11B2220/20H03L7/18H04N5/126H04N5/85H04N9/8042
    • A recording/reproducing apparatus and method are provided to record and reproduce data on and from a disk-shaped recording medium that has an address data area with embossed pits and a recording/reproducing area with a wobbling spiral groove. A wobble-signal processing circuit is used to extract a wobble signal from the signal the head obtains from the wobbling spiral groove and to provide the wobble signal to a PLL circuit to produce a sync signal therefrom. A pulse is produced at least during a wobble signal disturbance period occurring when switching between at least one of a recording and reproducing operation and provided to the PLL circuit in order to provide an unchanging sync signal during the wobble signal disturbance period to avoid the wobble disturbances from being carried over to the sync signal.
    • 提供了一种记录/再现装置和方法,用于在具有带浮雕凹坑的地址数据区域和具有摆动螺旋槽的记录/再现区域的盘形记录介质上记录和再现数据。 使用摆动信号处理电路从摇头螺旋槽获得的信号中提取摆动信号,并将摆动信号提供给PLL电路以产生同步信号。 至少在摆动信号干扰期间产生脉冲,当在至少一个记录和再现操作之间切换并提供给PLL电路时,为了在摆动信号扰动周期期间提供不变的同步信号,以避免摆动干扰 从被转移到同步信号。
    • 9. 发明授权
    • Magneto-optical recording apparatus
    • 磁光记录装置
    • US5689479A
    • 1997-11-18
    • US719183
    • 1996-09-24
    • Tadaaki Nomoto
    • Tadaaki Nomoto
    • G11B7/007G11B11/105G11B20/12G11B27/19G11B27/30G11B11/00
    • G11B20/1258G11B11/10508G11B11/10513G11B11/10595G11B27/19G11B27/3027G11B2220/2525G11B7/00745
    • In a magneto-optical recording apparatus, since a magnetic field is not generated in a data recording impossible area in order to lower power consumption, sufficient intensity of the magnetic field can be obtained at the head of a data recording area. In the case of recording information data in a data recording area of a magneto-optical recording medium, a magnetic field is generated in a data recording impossible area which exists between a pit formed at the latest end side of the data recording impossible area and the head of a data recording area located just after the data recording impossible area, without generating the magnetic field during the time of scanning a laser beam from the head of a data impossible area located just before a data recording area and a pit formed at the latest end side of the data recording impossible area. Thereby practically sufficient intensity of the magnetic field can be steadily and surely obtained at the time of recording information data in the data recording area. Thus a magneto-optical recording apparatus and a magneto-optical recording method which is able to cope with to high-density recording with low power consumption can be realized.
    • 在磁光记录装置中,由于在数据记录不可能区域中不产生磁场,以便降低功耗,可以在数据记录区域的头部获得足够的磁场强度。 在将信息数据记录在磁光记录介质的数据记录区域中的情况下,在不可数据区域的最后端形成的凹坑之间的数据记录不可能区域产生磁场, 位于数据记录不可能区域之后的数据记录区域的头部,在从位于数据记录区域之前的数据不可能区域的头部扫描激光束的时间期间不产生磁场,并且最后形成凹坑 数据记录不可能区域的端面。 因此,在数据记录区域中记录信息数据时,可以稳定且可靠地获得充分的磁场强度。 因此,可以实现能够以低功耗处理高密度记录的磁光记录装置和磁光记录方法。
    • 10. 发明授权
    • Demodulator, disk drive device, and demodulation method
    • 解调器,磁盘驱动器件和解调方法
    • US07706222B2
    • 2010-04-27
    • US11741267
    • 2007-04-27
    • Mariko FukuyamaTadaaki Nomoto
    • Mariko FukuyamaTadaaki Nomoto
    • G11B20/10
    • G11B27/24G11B20/10G11B20/14
    • A demodulator for demodulating an input signal including a predetermined modulated signal includes a multiplication fundamental wave generator for outputting a multiplication fundamental wave for the predetermined modulated signal, a calculator for multiplying the multiplication fundamental wave by the input signal and for integrating the multiplication result, a demodulated signal generator for generating a demodulated signal of the modulated signal using the output from the calculator, a phase determiner for determining a cross-phase state of the input signal and the multiplication fundamental wave on the basis of a balance of levels of a plurality of integrated values, obtained as the integration result, for an interval containing the modulated signal in the input signal, and a phase adjuster for adjusting a phase of the multiplication fundamental wave to be supplied to the calculator on the basis of the determination result of the phase determiner.
    • 用于解调包括预定调制信号的输入信号的解调器包括用于输出用于预定调制信号的乘法基波的乘法基波发生器,用于将乘法基本波乘以输入信号并用于积分乘法结果的计算器, 解调信号发生器,用于使用来自所述计算器的输出来产生所述调制信号的解调信号;相位确定器,用于基于所述多个信号的电平的平衡来确定所述输入信号和所述乘法基波的交叉相位状态; 作为积分结果获得的积分值用于包含输入信号中的调制信号的间隔,以及相位调整器,用于根据相位的确定结果调整要提供给计算器的乘法基波的相位 决定者