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1. 发明授权

US06721248B2 Optical disk unit 失效
标题翻译：光盘单元
公开(公告)号：US06721248B2
公开(公告)日：2004-04-13
申请号：US09867724
申请日：2001-05-29
申请人： Mitsumasa Kubo , Tadao Yamanouchi , Yuichi Sakamoto , Yoshiyuki Ootsuka
发明人： Mitsumasa Kubo , Tadao Yamanouchi , Yuichi Sakamoto , Yoshiyuki Ootsuka
IPC分类号： G11B700
CPC分类号： G11B7/0948 , G11B7/0045 , G11B7/0901
摘要： An optical disk unit for recording information on and reproducing information from a disk recording medium by projecting a light beam thereonto includes a signal level detection part detecting a level of a track error signal generated based on reflected light of the light beam from the disk recording medium, a scattered light detection part detecting scattering of the reflected light, and an off-track detection part which detects an off-track of the light beam using detection signals supplied from the signal level detection part and scattered light detection part.
摘要翻译：一种光盘单元，用于通过在其上投射光束来记录来自盘记录介质的信息和信息，该信号电平检测部分检测基于来自盘记录介质的光束的反射光产生的轨道误差信号的电平检测反射光的散射的散射光检测部，以及使用从信号电平检测部和散射光检测部提供的检测信号来检测光束的偏离磁道的偏离磁道检测部。

2. 发明授权

US06044052A Method and apparatus for high speed data recovery from CD-ROMs or like disks of varying qualities 失效
标题翻译：用于从具有不同质量的CD-ROM或类似盘进行高速数据恢复的方法和装置
公开(公告)号：US06044052A
公开(公告)日：2000-03-28
申请号：US345152
申请日：1999-06-30
申请人： Mitsumasa Kubo , Yuichi Sakamoto , Masashi Tanaka
发明人： Mitsumasa Kubo , Yuichi Sakamoto , Masashi Tanaka
IPC分类号： G11B7/09 , G11B7/095 , G11B19/04 , G11B3/90
CPC分类号： G11B19/04 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/095 , G11B7/0953 , G11B7/0956
摘要： CD-ROMS of more or less poor quality, such as those having eccentric center holes or uneven weight distributions circumferentially, tend to overload tracking and focusing servos and hence to invite read errors and retries. Each CD-ROM on being loaded into a CD-ROM drive is therefore checked as to its quality preparatory to reading. Either or both of the servos may fail to keep the read beam under control if the disk is not of good quality. Such unlocking of either or both servos is detected in terms of the number of transducer output pulses, the magnitude of transducer output voltage, or the number of read errors, during a complete disk revolution. Disk quality is first checked at four times the standard audio CD speed, then at eight times that speed, and finally at twelve times that speed. Disks of poor quality are read at two times the standard audio CD speed, those of below-average quality at four times that speed, those of above-average quality at eight times that speed, and those of good quality at twelve times that speed.
摘要翻译：质量差异较小的CD-ROMS（例如具有偏心中心孔或不均匀重量分布在周向上）倾向于过载跟踪和聚焦伺服，并因此引起读取错误和重试。因此，在加载到CD-ROM驱动器中的每个CD-ROM的质量准备阅读。如果磁盘质量不好，则伺服器中的任何一个或两个可能无法使读取光束受到控制。根据传感器输出脉冲的数量，换能器输出电压的大小或读取错误的数量，在完整的盘旋转期间检测这两个或两个伺服的这种解锁。磁盘质量首先是标准音频CD速度的四倍，然后是该速度的八倍，最后是该速度的十二倍。质量差的磁盘读取标准音频CD速度的两倍，低于平均质量的四倍速度，高于平均质量的八倍速度，以及高达十二倍的质量。

3. 发明授权

US5844872A Method and apparatus for high speed data recovery from CD-ROMS or like disks of varying qualities 失效
标题翻译：用于从CD-ROM或类似不同质量的磁盘高速数据恢复的方法和装置
公开(公告)号：US5844872A
公开(公告)日：1998-12-01
申请号：US880910
申请日：1997-06-23
申请人： Mitsumasa Kubo , Yuichi Sakamoto , Masashi Tanaka
发明人： Mitsumasa Kubo , Yuichi Sakamoto , Masashi Tanaka
IPC分类号： G11B19/28 , G11B7/0037 , G11B7/095 , G11B19/02 , G11B7/00
CPC分类号： G11B19/02 , G11B7/0953 , G11B7/0956 , G11B7/0037
摘要： CD-ROMS of poor quality, such as those having eccentric center holes or uneven weight distributions circumferentially, tend to overload b tracking and focusing servos and to invite read errors and retries. Each CD-ROM on being loaded into a CD-ROM drive is therefore checked as to its quality preparatory to reading. The disk is first rotated at eight times the standard audio CD speed, with both tracking and focusing servo gains set at matching values. If then at least either servo malfunctions, the disk is of poor quality, fit for reading at four or two times the standard audio CD speed. If both servos function normally, on the other hand, then the disk quality is rechecked at the same speed as before but with the servo gains lowered six decibels. A malfunctioning of at least either servo at this time indicates that the disk is of intermediate quality, to be read at eight times the standard audio CD speed. On the other hand, if both servos still function normally, the disk Is of good quality, suitable for reading at 12 times the standard audio CD speed.
摘要翻译：质量差的CD-ROMS，例如具有偏心中心孔或重量分布不均匀的CD-ROMS倾向于超载b跟踪和聚焦伺服，并引起读取错误和重试。因此，在加载到CD-ROM驱动器中的每个CD-ROM的质量准备阅读。磁盘首先以标准音频CD速度的八倍旋转，跟踪和聚焦伺服增益都设置为匹配值。如果那么至少有一个伺服器出现故障，磁盘质量差，适合读取标准音频CD速度的四到二倍。另一方面，如果两个伺服系统功能正常，则以与之前相同的速度重新检查磁盘质量，但伺服增益降低6分贝。此时至少有一个伺服器出现故障，表示该盘具有中等质量，以标准音频CD速度的八倍读取。另一方面，如果两个舵机仍然正常工作，则该盘质量好，适合于12倍标准音频CD读取速度。

4. 发明授权

US5963520A Method and apparatus for high speed data recovery from CD-ROMS or like disks or varying qualities 失效
标题翻译：用于从CD-ROM或类似磁盘或不同质量的高速数据恢复的方法和装置
公开(公告)号：US5963520A
公开(公告)日：1999-10-05
申请号：US884876
申请日：1997-06-30
申请人： Mitsumasa Kubo , Yuichi Sakamoto , Masashi Tanaka
发明人： Mitsumasa Kubo , Yuichi Sakamoto , Masashi Tanaka
IPC分类号： G11B7/09 , G11B7/095 , G11B19/04 , G11B3/90 , G11B7/00
CPC分类号： G11B19/04 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/095 , G11B7/0953 , G11B7/0956
摘要： CD-ROMS of more or less poor quality, such as those having eccentric center holes or uneven weight distributions circumferentially, tend to overload tracking and focusing servos and hence to invite read errors and retries. Each CD-ROM on being loaded into a CD-ROM drive is therefore checked as to its quality preparatory to reading. Either or both of the servos may fail to keep the read beam under control if the disk is not of good quality. Such unlocking of either or both servos is detected in terms of the number of transducer output pulses, the magnitude of transducer output voltage, or the number of read errors, during a complete disk revolution. Disk quality is first checked at four times the standard audio CD speed, then at eight times that speed, and finally at twelve times that speed. Disks of poor quality are read at two times the standard audio CD speed, those of below-average quality at four times that speed, those of above-average quality at eight times that speed, and those of good quality at twelve times that speed.
摘要翻译：质量差异较小的CD-ROMS（例如具有偏心中心孔或不均匀重量分布在周向上）倾向于过载跟踪和聚焦伺服，并因此引起读取错误和重试。因此，在加载到CD-ROM驱动器中的每个CD-ROM的质量准备阅读。如果磁盘质量不好，则伺服器中的任何一个或两个可能无法使读取光束受到控制。根据传感器输出脉冲的数量，换能器输出电压的大小或读取错误的数量，在完整的盘旋转期间检测这两个或两个伺服的这种解锁。磁盘质量首先是标准音频CD速度的四倍，然后是该速度的八倍，最后是该速度的十二倍。质量差的磁盘读取标准音频CD速度的两倍，低于平均质量的四倍速度，高于平均质量的八倍速度，以及高达十二倍的质量。

5. 发明授权

US5521895A Optical disk reproducing apparatus for controlling the rotational speed of a spindle motor between a CLV control and a CAV control 失效
标题翻译：用于在CLV控制和CAV控制之间控制主轴电动机的转速的光盘再现装置
公开(公告)号：US5521895A
公开(公告)日：1996-05-28
申请号：US504933
申请日：1995-07-20
申请人： Tohru Miura , Mitsumasa Kubo , Akira Mashimo
发明人： Tohru Miura , Mitsumasa Kubo , Akira Mashimo
IPC分类号： G11B7/0037 , G11B19/24 , G11B19/28 , G11B20/10 , G11B20/12 , G11B20/14 , G11B7/00
CPC分类号： G11B20/1403 , G11B19/24 , G11B20/10009 , G11B20/1258 , G11B7/0037
摘要： An optical disk reproducing apparatus uses a spindle motor having a low torque to reduced power consumption and manufacturing cost while maintaining a low error rate for reproduced data. The spindle motor is rotated at a constant rotational speed under a CAV control when a pick-up is moved. The rotational speed of the spindle motor is switched to a reference linear speed under a CLV control when a reproducing operation is performed. The reference linear speed is established for each of the zones of a recording area of an optical disk. The reference linear speed is determined by generating a zone clock set for each of the zones. A frequency error signal is generated by comparing the zone clock with the reproduction data so as to maintain the spindle motor at the reference linear speed determined by the zone clock.
摘要翻译：光盘再现装置使用具有低转矩的主轴电机来降低功耗和制造成本，同时保持低重现数据的错误率。当移动拾取器时，主轴电机在CAV控制下以恒定的转速旋转。当执行再现操作时，主轴电机的转速在CLV控制下切换到参考线速度。为光盘的记录区域的每个区域建立参考线速度。参考线速度通过为每个区域生成一个区时钟来确定。通过将区域时钟与再现数据进行比较来产生频率误差信号，以将主轴电动机保持在由区域时钟确定的参考线速度。

6. 发明授权

US5278815A Digital data reproducing apparatus 失效
标题翻译：数字数据再现装置
公开(公告)号：US5278815A
公开(公告)日：1994-01-11
申请号：US765129
申请日：1991-09-25
申请人： Akira Mashimo , Mitsumasa Kubo , Fumio Hishiyama , Masayoshi Shimamoto , Teruo Furukawa
发明人： Akira Mashimo , Mitsumasa Kubo , Fumio Hishiyama , Masayoshi Shimamoto , Teruo Furukawa
IPC分类号： G11B7/007 , G11B20/14 , G11B5/09
CPC分类号： G11B7/00745 , G11B20/1403
摘要： This digital data reproducing apparatus is adapted to prevent reproduction errors of data, wherein a read gate opened when a fixed pattern in a header field for phase locking is detected is kept opened until the data reproduction in a data field is completed, whereby the phase locking in the data field is performed still in the same low-speed mode as when the PLL pull-in is completed in the header field, with the responding ability lowered to defects such as voids or the like in the phase locking pattern area in the data field.This digital data reproducing apparatus is adapted to prevent reproduction errors, wherein, when a reproduced data in a data field is locked, a read gate is opened after a fixed pattern recorded for phase locking is surely detected, so that the phase locking is started in a high-speed mode, while avoiding erroneous operations of the PLL.
摘要翻译：该数字数据再现装置适用于防止检测到用于相位锁定的标题字段中的固定图案时读取门打开的数据的再现错误，直到数据字段中的数据再现完成为止，数据字段仍然处于与报头字段中PLL拉入完成相同的低速模式，响应能力降低到数据中相位锁定模式区域中的诸如空白等的缺陷领域。该数字数据再现装置适于防止再现错误，其中当数据字段中的再现数据被锁定时，在可靠地检测到记录为相位锁定的固定图案之后，读门被打开，从而开始相位锁定高速模式，同时避免PLL的错误操作。

7. 发明授权

US4845498A Wide dynamic range digital to analog conversion method and systems 失效
标题翻译：宽动态范围数模转换方法和系统
公开(公告)号：US4845498A
公开(公告)日：1989-07-04
申请号：US232562
申请日：1988-08-12
申请人： Mitsumasa Kubo , Tetsuro Araki
发明人： Mitsumasa Kubo , Tetsuro Araki
IPC分类号： H03M1/06 , H03M1/66
CPC分类号： H03M1/0641 , H03M1/66
摘要： A method and apparatus well suited for the conversion of a digitized audio signal into analog form with as wide a dynamic range as possible. A digital dither signal is added to a digital audio or like data signal to provide a digital data/dither signal. This digital data/dither signal and the digital dither signal are both converted into an analog data/dither signal and an analog dither signal respectively, and the analog dither signal is subtracted from the analog data/dither signal to obtain an analog data signal equivalent to the digital data signal. The level of the incoming digital data signal may be so high that when the digital dither signal is added thereto, the total level of the data/dither signal may exceed the capacity of the digital to analog converter in use. In that case the digital dither signal is either gated off or reduced in level, with the result that the digital to analog converter inputs either the data signal only or the data/dither signal having a total level not exceeding its capacity.
摘要翻译：一种非常适合将数字化音频信号转换成模拟形式并具有尽可能宽的动态范围的方法和装置。将数字抖动信号添加到数字音频或类似数据信号以提供数字数据/抖动信号。该数字数据/抖动信号和数字抖动信号分别转换为模拟数据/抖动信号和模拟抖动信号，并从模拟数据/抖动信号中减去模拟抖动信号，以获得等效于数字数据信号。输入数字数据信号的电平可能会很高，当加上数字抖动信号时，数据/抖动信号的总电平可能超过使用中的数模转换器的容量。在这种情况下，数字抖动信号被选通或降低电平，结果是数模转换器仅输入数据信号或数据/抖动信号的总电平不超过其容量。

8. 发明申请

US20100329093A1 DISK INSPECTION APPARATUS 有权
标题翻译：磁盘检查装置
公开(公告)号：US20100329093A1
公开(公告)日：2010-12-30
申请号：US12749189
申请日：2010-03-29
申请人： Mitsumasa Kubo , Tsuyoshi Oyamatsu
发明人： Mitsumasa Kubo , Tsuyoshi Oyamatsu
IPC分类号： G11B7/00
CPC分类号： G11B27/36 , G11B7/00375 , G11B20/1833 , G11B2220/2545 , G11B2220/2562
摘要： A disk inspection apparatus for discriminating disks. The disk inspection apparatus has an ECC control section and a comparison section. The ECC control section measures the number of error corrections PIE and the number of error correction failures PIF in a predetermined section of the disk. The comparison section discriminates the disk as a disk with a deterioration in jitter characteristic when the minimum or the average of the PIE exceeds a first threshold value; discriminates the disk as a normal disk when the maximum of the PIF is equal to or smaller than a second threshold and the minimum or the average of the PIE is equal to or smaller than the first threshold value; and discriminates the disk as a scratched disk when the minimum or the average of the PIE is equal to or smaller than the first threshold value and the maximum of the PIF exceeds the second threshold value.
摘要翻译：用于识别盘的盘检查装置。盘检测装置具有ECC控制部和比较部。 ECC控制部分测量盘的预定部分中的误差校正PIE的数量和纠错失败PIF的数量。当PIE的最小值或平均值超过第一阈值时，比较部分将盘识别为具有抖动特性劣化的盘; 当PIF的最大值等于或小于第二阈值并且PIE的最小值或平均值等于或小于第一阈值时，将盘识别为普通盘; 并且当PIE的最小值或平均值等于或小于第一阈值且PIF的最大值超过第二阈值时，将该盘识别为划痕盘。

9. 发明申请

US20090016182A1 DISK DRIVE AND INFORMATION PROCESSING SYSTEM HAVING THE SAME 有权
标题翻译：磁盘驱动器和信息处理系统
公开(公告)号：US20090016182A1
公开(公告)日：2009-01-15
申请号：US12060053
申请日：2008-03-31
申请人： Mitsumasa Kubo , Yutaka Kobayashi
发明人： Mitsumasa Kubo , Yutaka Kobayashi
IPC分类号： G11B20/10
CPC分类号： G11B19/28
摘要： A disk drive and an information processing system optimizes the number of rotations of a disk. Data read from a disk and previously-read cache data are temporarily stored in buffer memory. When a total amount of cache data achieved during a given period of time T1 or an average amount of the same is equal to or less than a threshold value X1, a system controller controls the number of rotations in an increasing manner, thereby optimizing the number of rotations. When a total amount of cache data achieved during a given period of time T2 (T1
摘要翻译：磁盘驱动器和信息处理系统优化磁盘的旋转数。从磁盘读取的数据和先前读取的缓存数据临时存储在缓冲存储器中。当在给定的时间段T1内达到的高速缓存数据的总量或其平均量等于或小于阈值X1时，系统控制器以增加的方式控制转数，从而优化数量的旋转。当在给定的时间段T2（T1

10. 发明授权

US07050374B2 Optical disk apparatus 有权
公开(公告)号：US07050374B2
公开(公告)日：2006-05-23
申请号：US10228620
申请日：2002-08-26
申请人： Kiyoshi Fukuchi , Mitsumasa Kubo
发明人： Kiyoshi Fukuchi , Mitsumasa Kubo
IPC分类号： G11B5/09
CPC分类号： G11B7/126
摘要： An optical disk apparatus for recording test data onto an optical disk while changing the level of recording power and determines the optimum recording power with reference to the quality of a reproduced signal of the test data. A modulation degree or a γ value is calculated from a reproduced signal of the test data, and the gradient of a change of the modulation degree or the γ value relative to the recording power Pw is calculated. Further, a target recording power is determined utilizing an area where the gradient of the change is relatively sharp, and the optimum recording power is determined based on the target recording power.

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