公开(公告)号：US5251194A

公开(公告)日：1993-10-05

申请号：US513079

申请日：1990-04-12

申请人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kimiyuki Koyanagi ,  Yoshiki Nakajima ,  Shuitsu Takeda ,  Kyoji Shimoda

发明人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kimiyuki Koyanagi ,  Yoshiki Nakajima ,  Shuitsu Takeda ,  Kyoji Shimoda

IPC分类号： G11B7/09 ,  G11B7/095

CPC分类号： G11B7/0945 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0946

摘要： An optical disk drive for recording and reproducing information on an optical disk medium includes a servo circuit for controlling tracking of a light beam on a predetermined track and a servo circuit for controlling focus of the light beam on the disk surface. The disk surface is divided into a plurality of regions, and calibration values for adjusting the servo circuits are determined in each region. The calibration values are stored in a memory and are used to adjust the servo circuits during tracking on a predetermined track. The calibration values include tracking offset values, focus offset values, servo deviation threshold values and sensor gain values. A number of techniques are disclosed for automatically determining the calibration values.

摘要翻译： 用于在光盘介质上记录和再现信息的光盘驱动器包括用于控制预定轨道上的光束的跟踪的伺服电路和用于控制光盘在盘表面上的聚焦的伺服电路。 磁盘表面被分成多个区域，并且在每个区域中确定用于调整伺服电路的校准值。 校准值存储在存储器中，并且用于在预定轨道上的跟踪期间调整伺服电路。 校准值包括跟踪偏移值，对焦偏移值，伺服偏差阈值和传感器增益值。 公开了用于自动确定校准值的许多技术。

公开(公告)号：US5184338A

公开(公告)日：1993-02-02

申请号：US655181

申请日：1991-02-13

申请人： Kyouzi Shimoda ,  Kyosuke Yoshimoto

发明人： Kyouzi Shimoda ,  Kyosuke Yoshimoto

IPC分类号： G11B7/085

CPC分类号： G11B7/08517

摘要： In an optical disc system having a tracking actuator for driving a light spot on an optical disc in a radial direction thereof; a photodetector for detecting off-track information in respect of the light spot position; a circuit for driving the tracking actuator and track-jumping the light spot to an adjacent track; an acceleration pulse generating circuit for generating an acceleration pulse signal to accelerate the tracking actuator during a track jumping operation; a deceleration pulse generating circuit for generating a deceleration pulse signal to decelerate the tracking actuator during the track jumping operation; and a center detecting circuit for detecting a center position between adjacent tracks in response to an output signal of the photodetector, the optical disc system is characterized by including a switching device responsive to an output signal of the center detecting circuit for switching from the acceleration pulse signal to the deceleration pulse signal after a predetermined period of time beginning at the start of the track jumping operation has lapsed.

摘要翻译： 在具有跟踪致动器的光盘系统中，该跟踪致动器用于沿其径向驱动光盘上的光点; 用于检测关于光点位置的偏离轨迹信息的光电检测器; 用于驱动跟踪致动器并将光点跟踪跳跃到相邻轨道的电路; 加速度脉冲发生电路，用于在轨道跳跃操作期间产生加速度脉冲信号以加速跟踪致动器; 减速脉冲发生电路，用于在轨道跳跃操作期间产生减速脉冲信号以使跟踪致动器减速; 以及中央检测电路，用于响应于光电检测器的输出信号检测相邻轨道之间的中心位置，其特征在于包括响应于中心检测电路的输出信号以从加速度脉冲切换的开关装置 在从轨道跳跃操作开始开始的预定时间段之后，向减速脉冲信号发出信号。

公开(公告)号：US5172364A

公开(公告)日：1992-12-15

申请号：US558584

申请日：1990-07-26

申请人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

发明人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

IPC分类号： G11B11/105

CPC分类号： G11B11/10521 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10534 ,  G11B11/10536 ,  G11B11/10586 ,  G11B11/10595

摘要： A magneto-optic recording apparatus which has a magnetic field generator that applies a magnetic field with a constant direction to a magneto-optic recording information medium for overwriting information to improve accuracy of recording and reproducing information onto and from magneto-optic recording information medium and further has an auxiliary magnetic field generator that compensates a variation of intensity of a magnetic field generated by the magnetic field generator and applied to the magneto-optic recording information medium is disclosed as the first invention. Also, a magneto-optic recording apparatus which performs synchronous wave detection of the reflected light signals from the magneto-optic recording information medium and controls A.C. voltages applied to an exciting coil of the magnetic field generator in response to the detected result of the synchronous wave detection, thus optimizing amplitudes of the reproducing signals from the magneto-optic recording information medium is disclosed as the second invention.

摘要翻译： 一种磁光记录装置，具有磁场发生器，该磁场发生器将具有恒定方向的磁场施加到磁光记录信息介质，用于重写信息，以提高在磁光记录信息介质上记录和再现信息的准确度;以及 作为第一发明，还公开了补偿由磁场发生器产生的磁场的强度变化并应用于磁光记录信息介质的辅助磁场发生器。 另外，磁光记录装置，对来自磁光记录信息介质的反射光信号进行同步波检测，并响应于同步波的检测结果控制施加到磁场发生器的励磁线圈的AC电压 作为第二发明，公开了检测，从而优化来自磁光记录信息介质的再现信号的振幅。

公开(公告)号：US4812726A

公开(公告)日：1989-03-14

申请号：US3798

申请日：1987-01-16

申请人： Toshihiko Benii ,  Kyosuke Yoshimoto

发明人： Toshihiko Benii ,  Kyosuke Yoshimoto

IPC分类号： G11B7/09 ,  G05B1/06

CPC分类号： G11B7/094 ,  G11B7/09

摘要： A servo system for controlling the position of an object in accordance with a servo signal, employing an A/D converter to normalize an error in the position of the object and to enable digital correction of any offset in the system and digital compensation for track jumping and drop outs.

摘要翻译： 一种伺服系统，用于根据伺服信号来控制物体的位置，采用A / D转换器对物体位置的误差进行归一化，并能够对系统中的任何偏移进行数字校正，并进行轨道跳跃的数字补偿 并退出。

公开(公告)号：US4775965A

公开(公告)日：1988-10-04

申请号：US099488

申请日：1987-09-22

申请人： Kyosuke Yoshimoto ,  Osamu Ito

发明人： Kyosuke Yoshimoto ,  Osamu Ito

IPC分类号： G11B7/013 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/24085 ,  G11B7/0938

摘要： Disclosed in a system for recording, reproducing, and/or erasing information as recording pits on a recording medium. This medium has guide grooves for recording reproducing, and/or erasing the informatin signal. A condition whereby the value which is obtained by subtracting the groove width from the groove pitch is larger than a width of the recording pits is satisfied. A predetermined position for recording, reproducing, and/or erasing is set between the guide grooves. Alternatively, a condition whereby the width of a guide groove is larger than the width of a recording pit is satisfied. A predetermined position for recording, reproducing, and/or erasing is set on the guide groove.

摘要翻译： 在用于记录，再现和/或擦除作为记录凹坑的记录介质上的信息的系统中公开。 该介质具有用于记录再现的导槽，和/或擦除信息信号。 满足通过从凹槽间距减去凹槽宽度而获得的值大于记录凹坑的宽度的条件。 在引导槽之间设置用于记录，再现和/或擦除的预定位置。 或者，满足引导槽的宽度大于记录凹坑的宽度的条件。 用于记录，再现和/或擦除的预定位置设置在引导槽上。

公开(公告)号：US20070036451A1

公开(公告)日：2007-02-15

申请号：US10548439

申请日：2004-03-12

申请人： Shigeo Ando ,  Yasuo Maeda ,  Mitsunobu Yoshinaga ,  Kanae Ikeda ,  Satoshi Minami ,  Kyosuke Yoshimoto ,  Aki Kimura

发明人： Shigeo Ando ,  Yasuo Maeda ,  Mitsunobu Yoshinaga ,  Kanae Ikeda ,  Satoshi Minami ,  Kyosuke Yoshimoto ,  Aki Kimura

IPC分类号： G06K9/00 ,  G06K9/36

CPC分类号： H04N19/136 ,  H04N19/124 ,  H04N19/172 ,  H04N19/60

摘要： Image feature values Va and Vh are derived from image data, coefficients C and D are determined based on the image feature values Va and Vb, and an approximate expression expressed with the file size Sfj of the JPEG compression file and the quantization data coefficient value Aqt is derived. Next, by designating the file size of a desired predetermined JPEG compression file based on the approximate expression, the quantization data coefficient value Aqt is derived, and a first quantization table as a reference is multiplied by the quantization data coefficient value Aqt, whereby a second quantization table is obtained. Then, using the second quantization table, the image data is actually JPEG-compressed.

摘要翻译： 从图像数据导出图像特征值Va和Vh，基于图像特征值Va和Vb确定系数C和D，以及用JPEG压缩文件的文件大小Sfj表示的近似表达式和量化数据系数值Aqt 是派生的。 接下来，通过基于近似表达式指定期望的预定JPEG压缩文件的文件大小，导出量化数据系数值Aqt，并且将作为参考的第一量化表与量化数据系数值Aqt相乘，由此将第二 获得量化表。 然后，使用第二量化表，图像数据实际上是JPEG压缩的。

公开(公告)号：US5457674A

公开(公告)日：1995-10-10

申请号：US755026

申请日：1991-09-04

申请人： Isao Watanabe ,  Koichi Yamada ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka

发明人： Isao Watanabe ,  Koichi Yamada ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka

IPC分类号： G11B20/12 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/125 ,  G11B11/105 ,  G11B19/02 ,  G11B19/28

CPC分类号： G11B7/126 ,  G11B11/10597 ,  G11B19/02 ,  G11B19/28 ,  G11B7/0037

摘要： An optical disc recording apparatus which records data with a second rotation frequency on an optical disc containing a preliminarily written recording condition in relation to a first rotation frequency. The optical disc recording apparatus preliminarily possesses recording condition in relation to the first and second rotation frequencies. The optical disc recording apparatus initially reads the recording condition in relation to the first rotation frequency, and then, in accordance with the read-out recording condition in relation to the first rotation frequency and the stored recording condition in relation to the first and second rotation frequencies, the recording apparatus computes the recording condition applicable to the optical disc in relation to the second rotation frequency. Finally, the optical disc recording apparatus records data on the optical disc by applying the computed recording condition. In consequence, even when the recording condition in relation to the second rotation frequency is not yet known, the apparatus can securely execute the data recording operation.

摘要翻译： 一种光盘记录装置，其在包含关于第一旋转频率的预先写入的记录条件的光盘上记录具有第二旋转频率的数据。 光盘记录装置预先具有关于第一和第二旋转频率的记录条件。 光盘记录装置最初读取关于第一旋转频率的记录条件，然后根据关于第一和第二旋转的第一旋转频率和存储的记录条件的读出记录条件 记录装置相对于第二旋转频率计算适用于光盘的记录条件。 最后，光盘记录装置通过应用计算出的记录条件将数据记录在光盘上。 因此，即使当关于第二旋转频率的记录条件尚不知道时，装置也可以安全地执行数据记录操作。

公开(公告)号：US5369628A

公开(公告)日：1994-11-29

申请号：US591610

申请日：1990-10-02

申请人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

发明人： Kyosuke Yoshimoto ,  Osamu Ito ,  Kunimaro Tanaka ,  Koichi Takeuchi ,  Isao Watanabe ,  Kazuhiko Tsutsumi

IPC分类号： G11B23/40 ,  G11B11/10 ,  G11B11/105 ,  G11B23/03 ,  G11B13/04 ,  G11B11/12

CPC分类号： G11B11/10584 ,  G11B11/105 ,  G11B11/10506 ,  G11B11/1056 ,  G11B11/10595 ,  G11B23/03

摘要： A magneto-optic recording medium has a cartridge provided with a magnetization direction indicating portion for indicating the direction of magnetization of a second magnetic layer. Alternatively, the direction of magnetization of the second magnetic layer is recorded in advance in the first magnetic layer. The direction of magnetization of the second magnetic layer indicated or recorded is detected and recognized. A magnetic field oriented in an opposite direction to the direction of magnetization detected is imparted to the magneto-optic recording medium. Alternatively, predetermined information is recorded in the first magnetic layer, the direction of magnetization of the second magnetic layer is detected on the basis of a signal reproducing that information, and the direction of a magnetic field to be applied to the magneto-optic recording medium is set on the basis of the direction of magnetization thus detected. In addition, the direction of the magnetic field to be applied to the magneto-optic recording medium is set and the output of a light beam is changed on the basis of the direction of the second magnetic layer detected.

摘要翻译： 磁光记录介质具有带有用于指示第二磁性层的磁化方向的磁化方向指示部的盒。 或者，第二磁性层的磁化方向预先记录在第一磁性层中。 检测并识别表示或记录的第二磁性层的磁化方向。 向磁光记录介质赋予与所检测的磁化方向相反的方向取向的磁场。 或者，预定信息被记录在第一磁性层中，基于再现该信息的信号和施加到磁​​光记录介质的磁场的方向来检测第二磁性层的磁化方向 基于这样检测的磁化方向设定。 此外，设置施加到磁光记录介质的磁场的方向，并且基于检测到的第二磁性层的方向改变光束的输出。

公开(公告)号：USRE34769E

公开(公告)日：1994-11-01

申请号：US983088

申请日：1992-11-27

申请人： Kyosuke Yoshimoto ,  Kyouji Shimoda

发明人： Kyosuke Yoshimoto ,  Kyouji Shimoda

IPC分类号： G11B7/09 ,  H03K17/62 ,  G01J1/20

CPC分类号： H03K17/6264 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943

摘要： An optical data medium driving apparatus which constitutes amplifiers for an output current signal of a photosensor including a plurality of current mirror circuits having different amplification factors in order to switch, in a wide range, the output current signal of the photosensor. The photosensor detects a quantity of the reflected light corresponding to a variation of the quantity of reflected light from an optical data medium having various characteristics. The output is obtained with high accuracy and in a wide band. A servo-circuit is used for an AGC circuit and normalizes a difference signal from each light receiving surface at a photosensor having a plurality of light receiving surfaces. An A/D converter is given the difference signal as an analog input signal and the sum signal as the reference input signal. The A/D converter outputs an offset binary type digital signal, thereby being inexpensive to produce, easy to be integrated having high function, and high in reliability.

摘要翻译： 一种光学数据介质驱动装置，其构成用于光传感器的输出电流信号的放大器，其包括具有不同放大系数的多个电流镜像电路，以便在宽范围内切换光电传感器的输出电流信号。 光传感器检测与来自具有各种特性的光学数据介质的反射光量的变化相对应的反射光量。 以高精度和宽带获得输出。 伺服电路用于AGC电路，并且在具有多个光接收表面的光传感器处对来自每个光接收表面的差分信号进行归一化。 A / D转换器作为模拟输入信号和和信号作为参考输入信号。 A / D转换器输出偏移二进制数字信号，从而便于生产，易于集成，功能高，可靠性高。

公开(公告)号：US5319626A

公开(公告)日：1994-06-07

申请号：US749890

申请日：1991-08-26

申请人： Minoru Ozaki ,  Kyosuke Yoshimoto ,  Hiroyuki Onda ,  Koji Yamana ,  Takuya Nagata ,  Hidehiko Murata ,  Yutaka Kobayashi

发明人： Minoru Ozaki ,  Kyosuke Yoshimoto ,  Hiroyuki Onda ,  Koji Yamana ,  Takuya Nagata ,  Hidehiko Murata ,  Yutaka Kobayashi

IPC分类号： G11B7/0037 ,  G11B19/04 ,  G11B20/18 ,  G11B7/00

CPC分类号： G11B20/1883 ,  G11B19/04 ,  G11B7/0037 ,  G11B2220/20

摘要： A method for rewriting four defect management areas on an optical disk according to an ECMA standard is performed by means of deleting an old data which has been recorded on the respective defect management areas and then sequentially writing down a new data on respective defect management areas.

摘要翻译： 通过删除已经记录在各个缺陷管理区域上的旧数据，然后顺序地将各个缺陷管理区域上的新数据写下来，执行根据ECMA标准在光盘上重写四个缺陷管理区域的方法。