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    Frequency demodulating circuit, optical disk apparatus thereof and preformating device
    1.
    发明授权
    Frequency demodulating circuit, optical disk apparatus thereof and preformating device 失效
    频率解调电路，其光盘装置和预处理装置

    公开(公告)号：US06678223B2

    公开(公告)日：2004-01-13

    申请号：US10244402

    申请日：2002-09-17

    申请人： Minoru Tobita ,  Susumu Tosaka ,  Yoshikatsu Niwa ,  Shinichi Nakao ,  Goro Fujita

    发明人： Minoru Tobita ,  Susumu Tosaka ,  Yoshikatsu Niwa ,  Shinichi Nakao ,  Goro Fujita

    IPC分类号： G11B7005

    CPC分类号： G11B7/24082 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/128 ,  G11B7/26 ,  G11B7/261 ,  G11B11/10565 ,  G11B11/10578 ,  G11B11/10582 ,  G11B20/1403 ,  G11B27/19 ,  G11B27/24 ,  G11B2220/2525

    摘要： An optical disk apparatus for driving an optical disk on which a groove wobble corresponding to a signal acquired from frequency modulation of biphase modulated address information, and a mark for representing phase information placed inside the wobble are preformatted, and having the biphase bit count “a” (“a” is a natural number) between two of the adjacent marks, and the channel bit count “n” (“n” is a natural number) between two of the adjacent marks. The apparatus includes first clock signal production device for generating a first clock signal utilizing an “n” frequency multiple of the reproduction signal of the clock mark, wobble signal reproduction device for reproducing from the optical disk a wobble signal corresponding to the groove wobble, and frequency demodulation device for acquiring the address information by frequency demodulation of the wobble signal. The frequency demodulation device has a second clock signal generator for generating a second clock signal by frequency dividing a data clock signal supplied from the first clock signal reproduction device by 1/M(M - - - n/(a·s)) in which a clock “s” (“s” is a natural number) is an oversampling value of the biphase bit, a waveform shaping unit for acquiring binary values by waveforming the wobble signal, and a detector for acquiring the address information by processing the second clock signal using the binary signal.

    摘要翻译： 一种光盘装置，用于驱动光盘，其上对应于从双相调制地址信息的频率调制获取的信号的槽摆动，以及用于表示放置在摆动内的相位信息的标记，并且具有双相位计数“a 两个相邻标记之间的“（”a“是自然数），并且两个相邻标记之间的通道位数”n“（”n“是自然数）。 该装置包括利用时钟标记的再现信号的“n”倍频产生第一时钟信号的第一时钟信号产生装置，用于从光盘再现与凹槽摆动相对应的摆动信号的摆动信号再现装置，以及 频率解调装置，用于通过摆动信号的频率解调获取地址信息。 频率解调装置具有第二时钟信号发生器，用于通过将从第一时钟信号再现装置提供的数据时钟信号分频1 / M（M - - n /（as））来产生第二时钟信号，其中时钟 “s”（“s”是自然数）是双相位的过采样值，波形整形单元，用于通过波形摆动信号来获取二进制值，以及检测器，用于通过处理第二时钟信号来获取地址信息，该检测器使用 二进制信号。

    Recording medium
    2.
    发明授权
    Recording medium 失效
    录音媒体

    公开(公告)号：US6128272A

    公开(公告)日：2000-10-03

    申请号：US392694

    申请日：1999-09-09

    申请人： Hideyoshi Horimai ,  Minoru Tobita ,  Goro Fujita ,  Susumu Tosaka

    发明人： Hideyoshi Horimai ,  Minoru Tobita ,  Goro Fujita ,  Susumu Tosaka

    IPC分类号： G11B7/0037 ,  G11B7/007 ,  G11B7/09 ,  G11B7/135 ,  G11B7/14 ,  G11B7/26 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G11B7/1369 ,  G11B7/0938 ,  G11B7/14 ,  G11B11/10515 ,  G11B11/10543 ,  G11B11/10578 ,  G11B11/10597 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/0901 ,  G11B7/24079 ,  G11B7/261

    摘要： A format of a recording medium suitable for a larger capacity, a higher transfer rate, and integration of pits/lands/grooves is provided. In a first method, in a recordable and reproduceable area, a twin-track structure of lands/grooves is configured such that tracks on which lands become recording tracks and tracks on which grooves become recording tracks form a double spiral. In a read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in a data area. In a second method, in a recordable and reproduceable area, a land/groove-alternate track structure is configured such that grooves become data recording tracks in the circular track next to the circular track in which lands become data recording tracks, and lands become data recording tracks in the next circular track. In the read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in the data area.

    摘要翻译： 提供了适合于更大容量，更高传送速率和凹坑/焊盘/凹槽的集成的记录介质的格式。 在第一种方法中，在一个可记录和可再生的区域中，一个平台/凹槽的双轨结构被配置为使得在其上成为记录轨迹的轨道和轨迹成为记录轨道的轨道形成双螺旋。 在只读区域中，排列凹坑，使得在数据区域中形成盘的径向方向的轨道。 在第二种方法中，在可记录和可再现区域中，配置一个槽脊/沟槽 - 交替轨道结构，使得凹槽成为在圆形轨道旁边的圆形轨道中的数据记录轨道，其中，焊盘变成数据记录轨道，并且焊盘成为数据 在下一个圆形曲目中录制曲目。 在只读区域中，排列凹坑，使得在数据区域中形成盘的径向方向的轨迹。

    Multi-value recorded data detecting method
    3.
    发明授权
    Multi-value recorded data detecting method 失效
    多值记录数据检测方法

    公开(公告)号：US5469420A

    公开(公告)日：1995-11-21

    申请号：US260118

    申请日：1994-06-15

    申请人： Goro Fujita ,  Minoru Tobita

    发明人： Goro Fujita ,  Minoru Tobita

    IPC分类号： G11B7/00 ,  G11B7/003 ,  G11B7/005 ,  G11B11/105 ,  G11B20/10 ,  G11B20/14 ,  G11B5/09

    CPC分类号： G11B20/1496 ,  G11B7/005

    摘要： A multi-value recorded data detecting method which can achieve accurate detection of multi-value data irrespective of a level variation or an amplitude variation of an input reproduction signal. A reproduction signal from a record medium, on which multi-value data are recorded, is converted from an analog signal into a digital signal in response to a reference clock signal to obtain signal level data. The signal level data are stored into memory means, and distribution information of the signal level data stored in the memory means are found out for each predetermined signal unit. Then, a threshold value or values are set in accordance with the distribution information, and the signal level data from the memory means are compared with the threshold value or values to obtain multi-value data.

    摘要翻译： 一种多值记录数据检测方法，其可以实现多值数据的精确检测，而与输入再现信号的电平变化或振幅变化无关。 来自记录了多值数据的记录介质的再现信号响应于参考时钟信号从模拟信号转换为数字信号以获得信号电平数据。 信号电平数据被存储到存储装置中，并且为每个预定信号单元找出存储在存储装置中的信号电平数据的分配信息。 然后，根据分布信息设置阈值或值，并将来自存储装置的信号电平数据与阈值或值进行比较以获得多值数据。

    Phase error detection method for magnetic wall displacement type of magneto-optical recording device
    4.
    发明授权
    Phase error detection method for magnetic wall displacement type of magneto-optical recording device 失效
    磁性壁位移型磁光记录装置的相位误差检测方法

    公开(公告)号：US06751166B2

    公开(公告)日：2004-06-15

    申请号：US10005607

    申请日：2001-12-07

    申请人： Goro Fujita ,  Tetsuhiro Sakamoto ,  Minoru Tobita

    发明人： Goro Fujita ,  Tetsuhiro Sakamoto ,  Minoru Tobita

    IPC分类号： G11B1100

    CPC分类号： G11B11/10515 ,  G11B11/1053 ,  G11B11/10595 ,  G11B20/10009

    摘要： A phase error detection apparatus and method is disclosed whereby a data signal is played back at a high S/N ratio from a magneto-optical disk making use of a ghost signal by magnetic domain wall displacement detection while the playback laser poser is kept at an optimum level. First, the laser power is controlled so that the time delay of a ghost signal from a data signal may be equal to a fixed multiple of a data detection clock. Thereupon, a laser power control section searches for a point at which the amount of jitters generated is small based on a RF signal. Then, the playback laser power is adjusted so that the time delay amount of the ghost signal from the data signal may be the fixed multiple n=5 of the clock nearest to the phase delay amount set in advance of a ghost which appears in the isothermal region with a laser power with which an optimum signal characteristic is obtained. In this instance, the laser power control section searches for a peak of the 5T amplitude of the displacement phase difference controlling pattern.

    摘要翻译： 公开了一种相位误差检测装置和方法，其中数据信号以高S / N比从使用鬼影信号的磁光盘通过磁畴壁位移检测重放，而播放激光器位置保持在 最佳水平。 首先，控制激光功率，使得来自数据信号的重影信号的时间延迟可以等于数据检测时钟的固定倍数。 因此，激光功率控制部基于RF信号来搜索生成的抖动量小的点。 然后，调整重放激光功率，使得来自数据信号的重影信号的时间延迟量可以是最接近出现在等温中的重影之前设置的相位延迟量的时钟的固定倍数n = 5 具有获得最佳信号特性的激光功率的区域。 在这种情况下，激光功率控制部分搜索位移相位差控制模式的5T振幅的峰值。

    Optical information recording medium, optical information recording method and optical information recording apparatus
    5.
    发明授权
    Optical information recording medium, optical information recording method and optical information recording apparatus 失效
    光信息记录介质，光信息记录方法和光信息记录装置

    公开(公告)号：US06320839B1

    公开(公告)日：2001-11-20

    申请号：US09178750

    申请日：1998-10-27

    申请人： Minoru Tobita ,  Goro Fujita ,  Shingo Imanishi

    发明人： Minoru Tobita ,  Goro Fujita ,  Shingo Imanishi

    IPC分类号： G11B724

    CPC分类号： G11B7/127 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/128 ,  G11B7/261 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2220/213 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B2220/2562

    摘要： An optical information recording medium, an optical information recording method and an optical information recording apparatus are able to prevent one laser beam of two laser beams from affecting the other laser beam by an offset. In an optical disc in which a groove whose one-side is wobbled or modulated only is sequentially formed by turning on or off one laser beam of two laser beams in accordance with a modulation signal and desired data is recorded by the groove, since the groove is formed by wobbling the one laser beam in such a manner that the one laser beam may not affect the other laser beam, a light intensity of the one laser beam is not added to a light intensity of the other laser beam, which is not wobbled by a wobbled amount so that the other-side of groove may be protected from the influence of the offset.

    摘要翻译： 光学信息记录介质，光学信息记录方法和光学信息记录装置能够防止两个激光束的一个激光束偏移而影响另一个激光束。 在其中通过根据调制信号和期望数据通过接通或断开两个激光束的一个激光束来顺序地形成单侧摆动或调制的槽的光盘由凹槽记录，因为凹槽 通过以一个激光束不影响另一个激光束的方式摆动一个激光束而形成，一个激光束的光强度不被加到不是摆动的另一个激光束的光强度 通过摆动量使得凹槽的另一侧可以被保护免受偏移的影响。

    Recording medium
    7.
    发明授权
    Recording medium 失效
    录音媒体

    公开(公告)号：US06215758B1

    公开(公告)日：2001-04-10

    申请号：US08937724

    申请日：1997-09-25

    申请人： Hideyoshi Horimai ,  Minoru Tobita ,  Goro Fujita ,  Susumu Tosaka

    发明人： Hideyoshi Horimai ,  Minoru Tobita ,  Goro Fujita ,  Susumu Tosaka

    IPC分类号： G11B700

    CPC分类号： G11B7/1369 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/14 ,  G11B7/24079 ,  G11B7/261 ,  G11B11/10515 ,  G11B11/10543 ,  G11B11/10578 ,  G11B11/10597

    摘要： A format of a recording medium suitable for a larger capacity, a higher transfer rate, and integration of pits/lands/grooves is provided. In a first method, in a recordable and reproduceable area, a twin-track structure of lands/grooves is configured such that tracks on which lands become recording tracks and tracks on which grooves become recording tracks form a double spiral. In a read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in a data area. In a second method, in a recordable and reproduceable area, a land/groove-alternate track structure is configured such that grooves become data recording tracks in the circular track next to the circular track in which lands become data recording tracks, and lands become data recording tracks in the next circular track. In the read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in the data area.

    摘要翻译： 提供了适合于更大容量，更高传送速率和凹坑/焊盘/凹槽的集成的记录介质的格式。 在第一种方法中，在一个可记录和可再生的区域中，一个平台/凹槽的双轨结构被配置为使得在其上成为记录轨迹的轨道和轨迹成为记录轨道的轨道形成双螺旋。 在只读区域中，排列凹坑，使得在数据区域中形成盘的径向方向的轨道。 在第二种方法中，在可记录和可再现区域中，配置一个槽脊/沟槽 - 交替轨道结构，使得凹槽成为在圆形轨道旁边的圆形轨道中的数据记录轨道，其中，焊盘变成数据记录轨道，并且焊盘变成数据 在下一个圆形曲目中录制曲目。 在只读区域中，排列凹坑，使得在数据区域中形成盘的径向方向的轨迹。

    Optical information recording or reproducing apparatus with asymmetry compensation
    10.
    发明授权
    Optical information recording or reproducing apparatus with asymmetry compensation 失效
    具有不对称补偿的光信息记录或再现装置

    公开(公告)号：US5469415A

    公开(公告)日：1995-11-21

    申请号：US144874

    申请日：1993-10-28

    申请人： Goro Fujita ,  Minoru Tobita

    发明人： Goro Fujita ,  Minoru Tobita

    IPC分类号： G11B7/005 ,  G11B20/10 ,  G11B20/18 ,  G11B7/00

    CPC分类号： G11B20/10296 ,  G11B20/10009 ,  G11B7/005

    摘要： In an optical information recording or reproducing apparatus, an asymmetry detection circuit detects asymmetry values from digital RF signals reproduced from the reference area of an optical disk according to a timing signal generated by a timing signal generator. The digital RF signals are demodulated by the viterbi algorithm by a viterbi detection circuit on the basis of asymmetry values detected by an asymmetry detection circuit.

    摘要翻译： 在光信息记录或再现装置中，不对称检测电路根据由定时信号发生器产生的定时信号从光盘的参考区域再现的数字RF信号中检测不对称值。 基于由不对称检测电路检测的不对称值，维特比检测电路通过维特比算法对数字RF信号进行解调。