-
公开(公告)号：US6014096A
公开(公告)日：2000-01-11
申请号：US947429
申请日：1997-10-08
申请人： Toshiyuki Nakagawa , Hiroyuki Ino , Shunji Yoshimura , Shinichi Kai , Yoshihide Shimpuku , Michihiko Iida , Tetsuji Kawashima , Shoji Sato
发明人： Toshiyuki Nakagawa , Hiroyuki Ino , Shunji Yoshimura , Shinichi Kai , Yoshihide Shimpuku , Michihiko Iida , Tetsuji Kawashima , Shoji Sato
CPC分类号： G11B20/1426 , G11B20/10009
摘要： If there is any portion in channel bit data obtained on converting a signal read out from a recording medium into a bi-level signal which fails to satisfy a condition concerning a minimum run length or a maximum run length of the same symbol, the channel bit data is corrected to improve the bit error rate to secure a skew margin. To this end, channel bit data not satisfying a minimum run length d' of the same symbol is detected by a (d'-1) detector 4 using n-tupled clocks obtained on n-tupling channel clocks of playback data by a bit clock generator 2, where n is an integer not less than 2. A correction position of the channel bit data having the run length of the same symbol equal to (d'-1) is designated by a correction bit position designating unit 5. A data correction unit 6 then corrects the channel bit data so that the minimum run length of the same symbol will be equal to d'.
摘要翻译： 如果在将从记录介质读出的信号转换成不能满足与相同符号的最小游程长度或最大游程长度有关的条件的双电平信号中获得的通道位数据中存在任何部分，则通道位 校正数据以提高误码率以确保偏斜裕度。 为此，由（d'-1）检测器4检测不满足相同符号的最小游程长度d'的通道位数据，使用通过位时钟在重放数据的n个tupling通道时钟上获得的n个元组时钟 发生器2，其中n是不小于2的整数。具有相同符号的游程长度等于（d'-1）的通道位数据的校正位置由校正位位置指定单元5指定。数据 校正单元6然后校正通道位数据，使得相同符号的最小游程长度将等于d'。
-
公开(公告)号：US5970026A
公开(公告)日：1999-10-19
申请号：US79362
申请日：1993-06-17
申请人： Shigeaki Wachi , Tetsuji Kawashima
发明人： Shigeaki Wachi , Tetsuji Kawashima
CPC分类号： G11B11/10508 , G11B11/10595 , G11B2005/001
摘要： A magnetic modulator coil driving circuit comprises: first and second switching elements for inverting the polarity of exciting currents supplied to magnetic modulator coils, first and second bias voltage setting circuit for determining control voltages to be applied to the first and second switching elements to adjust the currents flowing through the first and second switching elements to a predetermined value, and a data input circuit for supplying modulating data to turn on and off the first and second switching elements alternately. The magnetic modulator coil driving circuit applies a control voltage to the control electrode of the corresponding switching element to control the exciting current to be supplied through the switching element to the corresponding magnetic modulator coil so that the exciting current coincides with a desired value when a reference voltage is applied to the control electrode. Thus a fixed exciting current is supplied to the magnetic modulator coil so that the intensity of the magnetic field may not vary due to temperature variation in the magnetic modulator coil and the magnetic modulator coil may not overheat or burn.
摘要翻译： 磁调制器线圈驱动电路包括：第一和第二开关元件，用于反转提供给磁调制器线圈的励磁电流的极性;第一和第二偏置电压设置电路，用于确定要施加到第一和第二开关元件的控制电压， 流过第一和第二开关元件的电流达到预定值;以及数据输入电路，用于提供调制数据以交替地接通和关断第一和第二开关元件。 磁调制器线圈驱动电路向对应的开关元件的控制电极施加控制电压，以将通过开关元件提供的励磁电流控制到相应的磁调制器线圈，使得当参考电压时激励电流与期望值一致 电压被施加到控制电极。 因此，固定的励磁电流被提供给磁调制器线圈，使得磁场的强度可能不会由于磁调制器线圈的温度变化而变化，并且磁调制器线圈可能不会过热或烧坏。
-
33.发明授权
公开(公告)号：US5495455A
公开(公告)日：1996-02-27
申请号：US50657
申请日：1993-04-22
申请人： Tetsuji Kawashima , Tetsu Watanabe
发明人： Tetsuji Kawashima , Tetsu Watanabe
IPC分类号： G11B7/085 , G11B11/105 , G11B19/14 , G11B11/00 , G11B17/22
CPC分类号： G11B19/14 , G11B11/10508 , G11B11/10573 , G11B11/10595 , G11B7/08517
摘要： A magneto-optical disc recording apparatus includes a magnetic head, an optical head, a position detector and a controller. The magnetic head supplies a vertical magnetic field corresponding to recording data to a magneto-optical disc. The optical head emits a light beam to the magneto-optical disc through a substrate of the magneto-optical disc. The magneto-optical disc is arranged between the magnetic head and the optical head. The optical head has an actuator for moving an objective lens in a tracking direction. The position detector detects the displacement of the actuator. The controller controls a recording operation of the magnetic head and the optical head. The recording operation is started when a result of detection by the position detector reaches a predetermined value.
摘要翻译： 磁光盘记录装置包括磁头，光头，位置检测器和控制器。 磁头将对应于记录数据的垂直磁场提供给磁光盘。 光头通过磁 - 光盘的基片将光束发射到磁 - 光盘。 磁光盘布置在磁头和光头之间。 光学头具有用于在跟踪方向上移动物镜的致动器。 位置检测器检测致动器的位移。 控制器控制磁头和光学头的记录操作。 当位置检测器的检测结果达到预定值时，开始记录操作。
-
34.发明授权公开(公告)号：US08213284B2
公开(公告)日：2012-07-03
申请号：US11434883
申请日：2006-05-17
申请人： Tetsuji Kawashima , Yukio Shishido , Yoshiyuki Tokumoto , Toru Ifuku , Hiroshi Naganuma , Kiyoshi Arai , Hideho Maeda
发明人： Tetsuji Kawashima , Yukio Shishido , Yoshiyuki Tokumoto , Toru Ifuku , Hiroshi Naganuma , Kiyoshi Arai , Hideho Maeda
IPC分类号： G11B7/00
CPC分类号： G11B7/00736 , G11B7/00454 , G11B7/24038 , G11B20/1217 , G11B2020/1228 , G11B2020/1231 , G11B2020/1288 , G11B2020/1297 , G11B2220/216 , G11B2220/218 , G11B2220/235 , G11B2220/257
摘要： A recording apparatus performs recording on an optical disc recording medium which has a plurality of recording layers and is capable of having data rewritten thereon. The recording apparatus includes recording means for performing data recording on each recording layer of the recording medium and recording controlling means for controlling the recording means so that, among the plurality of recording layers, recording of dummy data is performed preferentially starting from a recording layer intended for the final user data recording operation.
摘要翻译： 记录装置在具有多个记录层并且能够在其上重写数据的光盘记录介质上执行记录。 记录装置包括用于在记录介质的每个记录层上执行数据记录的记录装置和用于控制记录装置的记录控制装置，使得在多个记录层中，从预期的记录层开始优先执行伪数据的记录 用于最终用户数据记录操作。
-
公开(公告)号：US07319650B2
公开(公告)日：2008-01-15
申请号：US11113849
申请日：2005-04-25
申请人： Tetsuji Kawashima , Yukio Shishido
发明人： Tetsuji Kawashima , Yukio Shishido
摘要： The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is controlled according to the result of determination such that it is rotated at a constant angular velocity (CAV) or at a constant linear velocity (CLV) and recording is executed. Further, rotation driving control of the disk is selected according to factors other than the type of the disk, such as according to whether random recording is allowed or not, according to a recording state in the disk, according to whether an alternative area is provided or not, according to a recording start position, or according to whether initialization is required or not. CLV control or CAV control is appropriately selected for a disk at recording to suppress a reduction in accessibility and a reduction in data transmission rate.
-
公开(公告)号：US20060274626A1
公开(公告)日：2006-12-07
申请号：US11434883
申请日：2006-05-17
申请人： Tetsuji Kawashima , Yukio Shishido , Yoshiyuki Tokumoto , Toru Ifuku , Hiroshi Naganuma , Kiyoshi Arai , Hideho Maeda
发明人： Tetsuji Kawashima , Yukio Shishido , Yoshiyuki Tokumoto , Toru Ifuku , Hiroshi Naganuma , Kiyoshi Arai , Hideho Maeda
IPC分类号： G11B20/14
CPC分类号： G11B7/00736 , G11B7/00454 , G11B7/24038 , G11B20/1217 , G11B2020/1228 , G11B2020/1231 , G11B2020/1288 , G11B2020/1297 , G11B2220/216 , G11B2220/218 , G11B2220/235 , G11B2220/257
摘要： A recording apparatus performs recording on an optical disc recording medium which has a plurality of recording layers and is capable of having data rewritten thereon. The recording apparatus includes recording means for performing data recording on each recording layer of the recording medium and recording controlling means for controlling the recording means so that, among the plurality of recording layers, recording of dummy data is performed preferentially starting from a recording layer intended for the final user data recording operation.
摘要翻译： 记录装置在具有多个记录层并且能够在其上重写数据的光盘记录介质上执行记录。 记录装置包括用于在记录介质的每个记录层上执行数据记录的记录装置和用于控制记录装置的记录控制装置，使得在多个记录层中，从预期的记录层开始优先执行伪数据的记录 用于最终用户数据记录操作。
-
公开(公告)号：US20050195715A1
公开(公告)日：2005-09-08
申请号：US11113849
申请日：2005-04-25
申请人： Tetsuji Kawashima , Yukio Shishido
发明人： Tetsuji Kawashima , Yukio Shishido
摘要： The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is controlled according to the result of determination such that it is rotated at a constant angular velocity (CAV) or at a constant linear velocity (CLV) and recording is executed. Further, rotation driving control of the disk is selected according to factors other than the type of the disk, such as according to whether random recording is allowed or not, according to a recording state in the disk, according to whether an alternative area is provided or not, according to a recording start position, or according to whether initialization is required or not. CLV control or CAV control is appropriately selected for a disk at recording to suppress a reduction in accessibility and a reduction in data transmission rate.
-
公开(公告)号：US20050190676A1
公开(公告)日：2005-09-01
申请号：US11113884
申请日：2005-04-25
申请人： Tetsuji Kawashima , Yukio Shishido
发明人： Tetsuji Kawashima , Yukio Shishido
摘要： The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is controlled according to the result of determination such that it is rotated at a constant angular velocity (CAV) or at a constant linear velocity (CLV) and recording is executed. Further, rotation driving control of the disk is selected according to factors other than the type of the disk, such as according to whether random recording is allowed or not, according to a recording state in the disk, according to whether an alternative area is provided or not, according to a recording start position, or according to whether initialization is required or not. CLV control or CAV control is appropriately selected for a disk at recording to suppress a reduction in accessibility and a reduction in data transmission rate.
-
公开(公告)号：US20050185534A1
公开(公告)日：2005-08-25
申请号：US11113524
申请日：2005-04-25
申请人： Tetsuji Kawashima , Yukio Shishido
发明人： Tetsuji Kawashima , Yukio Shishido
IPC分类号： G11B19/20 , G11B19/12 , G11B19/26 , G11B19/28 , G11B7/0045
摘要： The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is controlled according to the result of determination such that it is rotated at a constant angular velocity (CAV) or at a constant linear velocity (CLV) and recording is executed. Further, rotation driving control of the disk is selected according to factors other than the type of the disk, such as according to whether random recording is allowed or not, according to a recording state in the disk, according to whether an alternative area is provided or not, according to a recording start position, or according to whether initialization is required or not. CLV control or CAV control is appropriately selected for a disk at recording to suppress a reduction in accessibility and a reduction in data transmission rate.
-
40.发明申请Optical disk driving apparatus and method, and recording medium and program used therewith 失效光盘驱动装置和方法，以及与其一起使用的记录介质和程序公开(公告)号：US20050063269A1
公开(公告)日：2005-03-24
申请号：US10925460
申请日：2004-08-24
申请人： Kunihiko Miyake , Tetsuji Kawashima
发明人： Kunihiko Miyake , Tetsuji Kawashima
CPC分类号： G11B19/125
摘要： An optical disk driving apparatus includes a control computer, and the optical disk driving apparatus acquires a wobble signal. The control computer calculates an average period of a binarized wobble signal and a variance of the period of the binarized wobble signal. The control computer determines whether the calculated average period satisfies the specifications of DVD−R or DVD−RW and determines whether the calculated variance is below a predetermined level.
摘要翻译： 光盘驱动装置包括控制计算机，光盘驱动装置获取摆动信号。 控制计算机计算二进制摆动信号的平均周期和二进制摆动信号的周期的方差。 控制计算机确定所计算的平均周期是否满足DVD-R或DVD-RW的规格，并确定所计算的方差是否低于预定水平。
-
-
-
-
-
-
-
-
-
搜索结果
46 条记录 (耗时 0.032 秒)
