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公开(公告)号：US4907100A
公开(公告)日：1990-03-06
申请号：US248123
申请日：1988-09-23
申请人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihasa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
发明人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihasa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
CPC分类号： G11B20/10212 , G11B20/182 , G11B5/035
摘要： A readout circuit in magnetic recording device is disclosed, in which a test data signal for detecting an error in the characteristics of an automatic equalizer is recorded in a predetermined position of each track of a magnetic recording medium. In readout mode, a test data signal for a selected track is read out first, and this signal is compared with a reference signal dependent on the system conditions to determine an error from the reference signal. The optimum equalization coefficient is determined to eliminate this error from the reference signal and is set in the equalizer. The data is readout under the optimum equalization characteristics thus set.
摘要翻译： 公开了一种磁记录装置中的读出电路，其中用于检测自动均衡器的特性误差的测试数据信号被记录在磁记录介质的每个磁迹的预定位置。 在读出模式下，首先读取所选轨道的测试数据信号，并根据系统条件将该信号与参考信号进行比较，以确定参考信号的误差。 确定最佳均衡系数以从参考信号中消除该误差，并将其设置在均衡器中。 在如此设置的最佳均衡特性下读出数据。
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公开(公告)号：US5008761A
公开(公告)日：1991-04-16
申请号：US489322
申请日：1990-03-05
申请人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihisa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
发明人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihisa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
CPC分类号： G11B20/10212 , G11B20/182 , G11B5/035
摘要： A readout circuit in magnetic recording device is disclosed, in which a test data signal for detecting an error in the characteristics of an automatic equalizer is recorded in a predetermined position of each track of a magnetic recording medium. In readout mode, a test data signal for a selected track is read out first, and this signal is compared with a reference signal dependent on the system conditions to determine an error from the reference signal. The optimum equalization coefficient is determined to eliminate this error from the reference signal and set in the equalizer. The data is readout under the optimum equalization characteristics thus set.
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公开(公告)号：US4823208A
公开(公告)日：1989-04-18
申请号：US76009
申请日：1987-07-21
申请人： Yasuhide Ouchi , Hajime Aoi , Nobumasa Nishiyama , Takashi Tamura , Makoto Saitoh , Reijiro Tsuchiya
发明人： Yasuhide Ouchi , Hajime Aoi , Nobumasa Nishiyama , Takashi Tamura , Makoto Saitoh , Reijiro Tsuchiya
CPC分类号： G11B20/10009
摘要： A signal read out circuit included in a magnetic recording device is disclosed in which plural kinds of slice levels are used simultaneously for a reproduced analog waveform to produce a plurality of gate signals corresponding to the slice levels, and it is judged on the basis of the gate signals whether each portion of the reproduced waveform is correct or not in producing a digital output.
摘要翻译： 公开了包括在磁记录装置中的信号读出电路，其中同时使用多种切片电平用于再现的模拟波形，以产生与切片电平相对应的多个门信号，并且基于 门信号是否产生数字输出，再现波形的每个部分是否正确。
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公开(公告)号：US4774601A
公开(公告)日：1988-09-27
申请号：US940494
申请日：1986-12-10
申请人： Yasuhide Ouchi , Hajime Aoi , Takashi Tamura , Nobumasa Nishiyama
发明人： Yasuhide Ouchi , Hajime Aoi , Takashi Tamura , Nobumasa Nishiyama
CPC分类号： G11B20/10009 , G11B20/10
摘要： In a read channel for magnetic recording used to reproduce information recorded on a magnetic recording medium, a signal reproduced from a magnetic head and a differentiated signal of the reproduction signal are ORed together to produce a gate signal. By using the gate signal, the information can be reproduced correctly.
摘要翻译： 在用于再现记录在磁记录介质上的信息的用于磁记录的读取通道中，从磁头再现的信号和再现信号的微分信号被或者并联在一起以产生一个门信号。 通过使用门信号，可以正确地再现信息。
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公开(公告)号：US4644424A
公开(公告)日：1987-02-17
申请号：US685118
申请日：1984-12-21
IPC分类号： G11B5/035 , G11B5/09 , H03H15/00 , H03H17/00 , H03H21/00 , H04B3/04 , G11B5/02 , H03H11/06 , H04B3/14
摘要： An equalizer equalizes a reproduced waveform reproduced by a thin film magnetic head by reproducing information recorded magnetically on a medium. In the equalizer, the reproduced waveform is delayed to a position of an undershot portion, and is attenuated to an amplitude corresponding to a magnitude of the undershot portion, and the resultant waveform is superposed on the reproduced waveform, to thereby eliminate the undershot portion. Furthermore, by superposing a waveform obtained by inverting the reproduced waveform and amplifying or attenuating the inverted waveform, on the reproduced waveform at a half power position thereof, the width is narrowed.
摘要翻译： 均衡器通过再现磁介质上记录的信息来均衡由薄膜磁头再现的再现波形。 在均衡器中，再生波形被延迟到下方的位置，并且被衰减到对应于低音部分的幅度的振幅，并且所得到的波形叠加在再现波形上，从而消除了低音部分。 此外，通过叠加通过反转再现波形而获得的波形并放大或衰减反相波形，在其半功率位置处的再现波形上，宽度变窄。
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公开(公告)号：US5572699A
公开(公告)日：1996-11-05
申请号：US32191
申请日：1993-03-15
申请人： Yoshihisa Kamo , Hajime Aoi , Hitoshi Kakuta , Yoshito Tsunoda , Hiromichi Fujisawa , Yosuke Seo , Yasuhide Ouchi
发明人： Yoshihisa Kamo , Hajime Aoi , Hitoshi Kakuta , Yoshito Tsunoda , Hiromichi Fujisawa , Yosuke Seo , Yasuhide Ouchi
CPC分类号： G06F3/0601 , G11B5/3133 , G06F2003/0697
摘要： A file system including an input/output unit for inputting data from and outputting data to an external system; a controller connected to the input/output unit for dividing the data into an optional number of parallel data; a management table for storing the number of divisions of the data; a head group for writing the divided parallel data into a storage medium at the same time; and a unit for reading the data from the storage medium while referring to information stored in management device.
摘要翻译： 一种文件系统，包括用于从外部系统输入数据并将数据输出到外部系统的输入/输出单元; 连接到输入/输出单元的控制器，用于将数据分成可选数量的并行数据; 用于存储数据的分割数的管理表; 用于同时将分割的并行数据写入存储介质的头组; 以及用于在参考存储在管理装置中的信息的同时从存储介质读取数据的单元。
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公开(公告)号：US5325364A
公开(公告)日：1994-06-28
申请号：US412514
申请日：1989-09-26
申请人： Yasuhide Ouchi , Hajime Aoi , Yoshihisa Kamo , Yosuke Seo , Hitoshi Kakuta
发明人： Yasuhide Ouchi , Hajime Aoi , Yoshihisa Kamo , Yosuke Seo , Hitoshi Kakuta
CPC分类号： G06F11/1076 , G06F11/1008 , G06F11/1443
摘要： An error correction circuit which includes a specification circuit for specifying erroneous portions in a first data set reproduced from a recording medium, a register for storing the reproduced first data set including the erroneous portions thus specified and a reproducing circuit responsive to the reproduced first data set for reproducing again the first data set from the recording medium to obtain retry data, when there exist erroneous portions in the reproduced first data set stored in the register. The correction circuit also includes a data replace circuit, connected to receive the retry data, for replacing information at the specified erroneous portions in the reproduced first data set stored in the register by information at corresponding portions in the retry data.
摘要翻译： 一种误差校正电路，包括用于指定从记录介质再现的第一数据组中的错误部分的指定电路，用于存储包括如此指定的错误部分的再现的第一数据组的寄存器和响应于再现的第一数据集的再现电路 当存储在寄存器中的再现的第一数据组中存在错误部分时，再次从记录介质再现第一数据组以获得重试数据。 校正电路还包括连接以接收重试数据的数据替换电路，用于通过重试数据中的相应部分处的信息替换存储在寄存器中的再现的第一数据集中的指定错误部分处的信息。
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公开(公告)号：US4651236A
公开(公告)日：1987-03-17
申请号：US817037
申请日：1986-01-08
CPC分类号： G11B20/10212 , G11B20/22 , G11B5/035
摘要： A waveform equalizing circuit including a delay line, an attenuator, and a differential amplifier applied with the outputs of the delay line and attenuator is disclosed in which the delay time of the delay line and the attenuation factor of the attenuator are changed in accordance with the characteristic of a waveform applied to the delay line and attenuator.
摘要翻译： 公开了包括延迟线，衰减器和施加延迟线和衰减器的输出的差分放大器的波形均衡电路，其中延迟线的延迟时间和衰减器的衰减因子根据 施加到延迟线和衰减器的波形的特性。
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公开(公告)号：US5287228A
公开(公告)日：1994-02-15
申请号：US738627
申请日：1991-07-31
申请人： Hideki Sawaguchi , Yasuhide Ouchi , Hajime Aoi
发明人： Hideki Sawaguchi , Yasuhide Ouchi , Hajime Aoi
CPC分类号： G11B20/10212 , G11B20/1423 , G11B20/1426 , G11B5/09
摘要： The time interval/amplitude level difference between sequential peaks in waveforms of first reproducing signals from a recording medium is detected and stored in a storage. The time interval/amplitude level difference between peaks in a waveform of a second reproducing signal from the recording medium is detected and compared with the time interval/amplitude level difference stored in the storage to thereby perform peak detection in the waveforms thereof. An original bit train of the first reproducing signal corresponding to a maximum-likelihood waveform selected among the waveforms of the first reproducing signals is given as a standardized signal. Data are provided to represent the time interval/amplitude level difference between the sequential peaks in the waveforms of the reproducing signals in a range of electromagnetic signal interference on the recording medium.
摘要翻译： 来自记录介质的第一再现信号的波形中的连续峰值之间的时间间隔/振幅电平差被检测并存储在存储器中。 检测来自记录介质的第二再现信号的波形中的峰值之间的时间间隔/振幅电平差，并将其与存储在存储器中的时间间隔/振幅电平差进行比较，从而在其波形中进行峰值检测。 将与第一再现信号的波形中选择的最大似然波形对应的第一重放信号的原始比特串作为标准化信号。 提供数据以表示记录介质上的电磁信号干扰范围内的再现信号的波形中的顺序峰值之间的时间间隔/幅度电平差。
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10.发明授权Magnetic recording and reproducing method using phase discrimination and apparatus therefor 失效使用相位鉴别的磁记录和再现方法及其装置
公开(公告)号：US5467232A
公开(公告)日：1995-11-14
申请号：US36280
申请日：1993-03-24
申请人： Yasuhide Ouchi , Naoki Sato , Hideki Sawaguchi , Yosuke Hori
发明人： Yasuhide Ouchi , Naoki Sato , Hideki Sawaguchi , Yosuke Hori
CPC分类号： H04L25/03038 , G11B20/10009 , G11B5/09
摘要： In a phase discrimination signal processing system in the signal reproduction of a magnetic recording and reproducing apparatus, instead of differentiation of a reproduced signal, amplitude discrimination automatic equalization is effected for an isolated waveform at a phase discrimination point corresponding to an isolated magnetization reversal reproduced by a magnetic head such that an amplitude at each discrimination time other than a peak point is zero to effect phase discrimination of the signal waveform.
摘要翻译： 在磁记录和再现装置的信号再现中的相位鉴别信号处理系统中，代替再生信号的区分，对相应于与由 磁头，使得除了峰值点之外的每个鉴别时间的振幅为零，以实现信号波形的相位识别。
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