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21. 发明授权

US07576935B2 Apparatus for recording and regenerating data 失效
标题翻译：用于记录和再生数据的装置
公开(公告)号：US07576935B2
公开(公告)日：2009-08-18
申请号：US11116194
申请日：2005-04-28
申请人： Masakazu Taguchi , Akihiro Itakura , Akiyoshi Uchida
发明人： Masakazu Taguchi , Akihiro Itakura , Akiyoshi Uchida
IPC分类号： G11B5/09 , H04L27/06 , H03M13/03 , G11B5/035
CPC分类号： G11B20/10101 , G11B5/00813 , G11B5/012 , G11B20/10009 , G11B20/1866 , H03M13/39
摘要： In an apparatus for recording and regenerating data, a pass metric is calculated based on a likelihood converted from a previous calculation result iteratively until all pass metrics of the same data recorded many times on a recording medium are calculated, and then data recorded on the recording medium is decoded.
摘要翻译：在用于记录和重新生成数据的装置中，基于从先前计算结果转换的似然率计算通过度量，直到计算记录在记录介质上多次记录的相同数据的所有通过度量，然后记录在记录上的数据介质被解码。

22. 发明授权

US07430702B2 Data recording/reproducing apparatus and data recording/reproducing method 失效
标题翻译：数据记录/再现装置和数据记录/再现方法
公开(公告)号：US07430702B2
公开(公告)日：2008-09-30
申请号：US11041248
申请日：2005-01-25
申请人： Masakazu Taguchi
发明人： Masakazu Taguchi
IPC分类号： H03M13/00 , H03M13/03
CPC分类号： G11B20/1813
摘要： A data recording/reproducing method and apparatus for correcting data errors on a recording medium even with the use of a conventional ECC. The data recording/reproducing apparatus includes a generation unit that generates predetermined data units by dividing an ECC sector including error correction codes generated by an error correction encoder into prescribed data units and encoding the prescribed units into iterative encoded data units using an iterative encoder so that the predetermined data units may include the iterative-encoded data units, a recording unit, a reproducing unit, an iterative decoder for conducting iterative decoding on the predetermined data units, and an error correction decoder. The apparatus further includes a distribution unit for distributing the predetermined data units generated by the generation unit. The distribution unit distributes the iterative encoded data units using at least two ECC sectors and records the distributed data units on a recording medium.
摘要翻译：一种数据记录/再现方法和装置，用于即使使用传统的ECC也可以在记录介质上校正数据错误。数据记录/重放装置包括一个生成单元，该生成单元通过将包括由纠错编码器产生的纠错码的ECC扇区除以规定的数据单位并使用迭代编码器将规定单元编码为迭代编码数据单元，从而生成预定数据单元，预定数据单元可以包括迭代编码数据单元，记录单元，再现单元，用于对预定数据单元执行迭代解码的迭代解码器，以及纠错解码器。该装置还包括分配单元，用于分配由生成单元生成的预定数据单元。分发单元使用至少两个ECC扇区分布迭代编码的数据单元，并将分布式数据单元记录在记录介质上。

23. 发明授权

US07287211B2 Data readout device and data readout method 失效
标题翻译：数据读出装置和数据读出方式
公开(公告)号：US07287211B2
公开(公告)日：2007-10-23
申请号：US10339548
申请日：2003-01-09
申请人： Masakazu Taguchi , Akihiro Itakura
发明人： Masakazu Taguchi , Akihiro Itakura
IPC分类号： H03M13/03 , H03M13/00
CPC分类号： H03M13/6343 , H03M13/15 , H03M13/2909 , H03M13/2957 , H03M13/41 , H03M13/6577
摘要： A data readout device generates decoded data based on a data bit determined by performing a hard-decision on likelihood data. The likelihood data is generated using an iterative decoding method corresponding to a turbo-coding process. The decoding process is performed on a sampled value obtained by sampling a signal read out from a magneto-optical disk at a predetermined sampling period. A reliability determination part detects whether each obtained data bit was obtained from likelihood data within a predetermined range defined with respect to a histogram of log likelihood ratios. When it is detected that a data bit was obtained by a hard-decision on likelihood data within the predetermined range, the data bit is regarded as being obtained by a hard-decision whose reliability is not sufficient. In this way, the error correcting decoder can perform ECC-based decoding operations including loss-correction processes depending on respective reliability-determination results that distinguish reliabilities among respective data bits.
摘要翻译：数据读出装置基于通过对似然数进行硬判定而确定的数据位来生成解码数据。使用对应于turbo编码处理的迭代解码方法生成似然数据。对通过在预定采样周期对从磁光盘读出的信号进行采样而获得的采样值执行解码处理。可靠性确定部分检测在相对于对数似然比的直方图定义的预定范围内的似然数据中是否获得了所获得的数据位。当检测到通过在预定范围内的似然数据的硬判决获得数据位时，数据位被认为是通过可靠性不足的硬判决获得的。以这种方式，错误校正解码器可以根据区分各个数据位之间的可靠性的各个可靠性确定结果，执行包括损失校正处理的基于ECC的解码操作。

24. 发明申请

US20050185314A1 Apparatus for recording and regenerating data 失效
公开(公告)号：US20050185314A1
公开(公告)日：2005-08-25
申请号：US11116194
申请日：2005-04-28
申请人： Masakazu Taguchi , Akihiro Itakura , Akiyoshi Uchida
发明人： Masakazu Taguchi , Akihiro Itakura , Akiyoshi Uchida
IPC分类号： G11B5/008 , G11B5/012 , G11B20/10 , G11B20/18 , H03M13/39 , H03M13/41
CPC分类号： G11B20/10101 , G11B5/00813 , G11B5/012 , G11B20/10009 , G11B20/1866 , H03M13/39
摘要： In an apparatus for recording and regenerating data, a pass metric is calculated based on a likelihood converted from a previous calculation result iteratively until all pass metrics of the same data recorded many times on a recording medium are calculated, and then data recorded on the recording medium is decoded.

25. 发明授权

US06775219B2 Data reproduction control method and apparatus, and optical disk unit 失效
标题翻译：数据再现控制方法和装置以及光盘单元
公开(公告)号：US06775219B2
公开(公告)日：2004-08-10
申请号：US10457758
申请日：2003-06-09
申请人： Toru Fujiwara , Akira Nanba , Masakazu Taguchi
发明人： Toru Fujiwara , Akira Nanba , Masakazu Taguchi
IPC分类号： G11B509
CPC分类号： G11B20/10212 , G11B20/10009 , G11B20/10046 , G11B20/10101 , G11B20/10481 , H03M13/41 , H03M13/6331 , H03M13/6343 , H03M13/6502 , H03M13/6577 , H04L25/062 , H04L25/069
摘要： The present invention realizes stable and more proper data reproduction even when a reproduced signal varies locally due to a noise or includes a steady distortion. In a data reproduction control method and apparatus, and an optical disk unit that adjust sampled values, in sampling a signal reproduced from a recording medium recorded with data, the frequencies of the levels of quantized data are counted, a histogram of the frequencies of the levels is created based on the counting results, and more accurate reproduced data is obtained by means of a distribution of the frequencies of the levels in the histogram.
摘要翻译：即使再现信号由于噪声而局部变化或包括稳定的失真，本发明实现了稳定和更合适的数据再现。在数据再现控制方法和装置以及调整采样值的光盘单元中，对从记录有数据的记录介质再现的信号进行采样时，对量化数据的电平的频率进行计数，基于计数结果创建电平，并且通过直方图中电平的频率的分布获得更准确的再现数据。

26. 发明授权

US06724702B2 Apparatus for reproducing recorded data 失效
标题翻译：用于再现记录数据的装置
公开(公告)号：US06724702B2
公开(公告)日：2004-04-20
申请号：US09997325
申请日：2001-11-29
申请人： Masakazu Taguchi , Akiyoshi Uchida , Toshikazu Kanaoka
发明人： Masakazu Taguchi , Akiyoshi Uchida , Toshikazu Kanaoka
IPC分类号： G11B700
CPC分类号： G11B20/10083 , G11B7/005 , G11B11/10515 , G11B11/10597 , G11B20/10009 , G11B20/10055 , G11B20/22
摘要： In an apparatus for reproducing recorded data, a crosstalk signal is generated by converting adjacent data recorded on an adjacent track into a waveform of said reproduction signal and the crostalk signal is deducted from the reproduction signal. Then, the reproduction signal in which the crosstalk signal is eliminated is decoded in accordance with the predetermined algorithm and reproduced.
摘要翻译：在用于再现记录数据的装置中，通过将记录在相邻轨道上的相邻数据转换成所述再现信号的波形来产生串扰信号，并且从再现信号中减去串扰信号。然后，根据预定算法解码消除了串扰信号的再现信号并再现。

27. 发明授权

US06600698B1 Method for recording a plural rows of record marks in one track in magneto-optical recording device 失效
标题翻译：用于在磁光记录装置中的一个轨道中记录多行记录标记的方法
公开(公告)号：US06600698B1
公开(公告)日：2003-07-29
申请号：US09723233
申请日：2000-11-27
申请人： Akiyoshi Uchida , Masakazu Taguchi , Michio Matsuura
发明人： Akiyoshi Uchida , Masakazu Taguchi , Michio Matsuura
IPC分类号： G11B1100
CPC分类号： G11B7/127 , G11B7/0045 , G11B7/14 , G11B7/24085 , G11B7/24088 , G11B11/10504 , G11B11/10515 , G11B11/10528 , G11B20/18
摘要： An optical disk recording method of recording data on an optical disk by applying laser light to a track of the optical disk, includes the steps of a) driving a plurality of laser light sources in sequence in a time division manner, and applying a light flux to one track of the optical disk successively, and b) producing a plurality of rows of record marks in the one track.
摘要翻译：通过对光盘的轨道施加激光来在光盘上记录数据的光盘记录方法包括以下步骤：a）按时间顺序依次驱动多个激光光源，并施加光通量连续地连接到光盘的一个轨道，以及b）在一个轨道中产生多行记录标记。

28. 发明授权

US06577560B2 Magneto-optic recording medium in which magnetic partition tracks are removed for high track density 失效
标题翻译：磁性记录介质，其磁性分隔轨道被移除以达到高轨道密度
公开(公告)号：US06577560B2
公开(公告)日：2003-06-10
申请号：US09972066
申请日：2001-10-05
申请人： Akihiro Itakura , Masakazu Taguchi
发明人： Akihiro Itakura , Masakazu Taguchi
IPC分类号： G11B1100
CPC分类号： G11B11/10515 , G11B11/10593
摘要： A magneto-optic recording medium, which has a multilayered magnetic layer including a recording layer and a reproducing layer, is capable of reproducing a micro mark by utilizing a temperature distribution generated by laser beam irradiation for transferring a domain wall from the recording layer to the reproducing layer and by utilizing the movement of the domain wall. Each of the recording areas is arranged so that the recording area is adjacent to a magnetic partition area of a neighboring track. The recording areas and the magnetic partition areas are arranged alternately in one track, and an edge of a record mark is positioned in the recording area. Preferably, when reproducing information recorded on this magneto-optic recording medium, two neighboring tracks are irradiated with one laser beam for reproduction so that high speed transmission can be performed.
摘要翻译：具有包括记录层和再现层的多层磁性层的磁光记录介质能够通过利用通过激光束照射产生的温度分布来再现微标记，以将畴壁从记录层转移到再现层和利用畴壁的移动。每个记录区域被布置成使得记录区域与相邻轨道的磁分区相邻。记录区域和磁性分隔区域交替排列在一个轨道中，并且记录标记的边缘位于记录区域中。优选地，当再现记录在该磁光记录介质上的信息时，用一个激光束照射两个相邻轨道进行再现，从而可以执行高速传输。

29. 发明授权

US5854775A Magneto-optic disk recording system having improved duty ratio controller 失效
标题翻译：具有改进的占空比控制器的磁光盘记录系统
公开(公告)号：US5854775A
公开(公告)日：1998-12-29
申请号：US740260
申请日：1996-10-25
申请人： Haruhiko Izumi , Masaharu Moritsugu , Masakazu Taguchi
发明人： Haruhiko Izumi , Masaharu Moritsugu , Masakazu Taguchi
IPC分类号： G11B11/105 , G11B11/00
CPC分类号： G11B11/1053 , G11B11/10506 , G11B11/10521
摘要： A magneto-optic disk recording system capable of canceling shifts of the front edge and the rear edge of the record mark due to accumulation of heat. The recording system includes a magneto-optic disk having a record magnetic film, and a magnet for applying a bias magnetic field to the disk in the direction perpendicular thereto. The recording system further includes a laser diode for generating laser beams, an optical head for focusing the laser beam on the disk, a pulse generator for generating square wave pulses with a predetermined period, and a duty ratio controller for alternately increasing and decreasing the duty ratio of the square wave pulses every time data "1" of binary record data is generated. The laser diode is driven by a constant-current circuit for write power. There is connected a switch between the laser diode and the constant-current circuit for write power. The switch is turned on/off in accordance with the output pulse of the duty ratio controller so that the laser diode emits a pulsed beam.
摘要翻译：一种磁光盘记录系统，其能够消除由于积聚而导致的记录标记的前边缘和后边缘的偏移。记录系统包括具有记录磁性膜的磁光盘和用于在与其垂直的方向上向磁盘施加偏置磁场的磁体。记录系统还包括用于产生激光束的激光二极管，用于将激光束聚焦在盘上的光头，用于产生具有预定周期的方波脉冲的脉冲发生器和用于交替地增加和减小占空比的占空比控制器每当产生二进制记录数据的数据“1”时，方波脉冲的比率。激光二极管由用于写入功率的恒流电路驱动。在激光二极管和恒流电路之间连接一个开关，用于写入功率。根据占空比控制器的输出脉冲使开关导通/截止，使得激光二极管发射脉冲光束。

30. 发明授权

US5428594A Magneto-optic recording method and apparatus utilizing a two-state modulated light beam 失效
标题翻译：利用双态调制光束的磁光记录方法和装置
公开(公告)号：US5428594A
公开(公告)日：1995-06-27
申请号：US104045
申请日：1993-08-18
申请人： Haruhiko Izumi , Masaharu Moritsugu , Masakazu Taguchi
发明人： Haruhiko Izumi , Masaharu Moritsugu , Masakazu Taguchi
IPC分类号： G11B11/105 , G11B11/10
CPC分类号： G11B11/1053 , G11B11/10517 , G11B11/10595
摘要： A magneto-optic recording method and a magneto-optic recording apparatus in which a magneto-optic overwritable medium having two layers, which layers have different coercive force--temperature characteristics and are coupled by exchange interaction, is heated by applying a light beam while an external magnetic field is being applied to the medium and in which data coded to invariably have FALSE states between two TRUE states is turned into a light beam having dual power levels and recorded on the medium, the magneto-optic recording method including the steps of: forming record marks by heating the magneto-optic overwritable medium to a high temperature by means of a high light beam power associated with a FALSE state in the write data; and of heating the magneto-optic overwritable medium to a low temperature by means of a low light beam power associated with a TRUE state in the write data.
摘要翻译： PCT No.PCT / JP92 / 01701 Sec。 371日期：1993年8月18日 102（e）日期1993年8月18日PCT提交1992年12月25日PCT公布。公开号WO93 / 13523 日期：1993年7月8日。磁光记录方法和磁光记录装置，其中具有两层的磁光可覆写介质，这些层具有不同的矫顽力 - 温度特性并通过交换相互作用耦合，被加热通过在将外部磁场施加到介质的同时施加光束，并且其中被编码为在两个TRUE状态之间总是具有FALSE状态的数据被转换成具有双功率电平并被记录在介质上的光束记录方法包括以下步骤：通过在写入数据中与FALSE状态相关联的高光束功率将磁光可重写介质加热到高温来形成记录标记; 以及通过与写入数据中的TRUE状态相关联的低光束功率将磁光可重写介质加热到低温。

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