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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
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。
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公开(公告)号：US4916449A
公开(公告)日：1990-04-10
申请号：US118261
申请日：1987-11-09
申请人： Mitsumasa Kubo , Tetsuro Araki
发明人： Mitsumasa Kubo , Tetsuro Araki
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。
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公开(公告)号：US4751496A
公开(公告)日：1988-06-14
申请号：US881389
申请日：1986-07-02
申请人： Tetsuro Araki , Mitsumasa Kubo
发明人： Tetsuro Araki , Mitsumasa Kubo
CPC分类号： H03M1/0854 , H03M1/0639
摘要： A method and apparatus well suited for digitizing an audio signal with as wide a dynamic range as possible. An analog dither signal is added to an analog audio or like data signal to provide an analog data/dither signal. This analog data/dither signal and the analog dither signal are both converted into a digital data/dither signal and a digital dither signal respectively, and the digital dither signal is subsequently subtracted from the digital data/dither signal to obtain a digital data signal equivalent to the analog data signal. The magnitude of the incoming analog data signal may be so high that when the analog dither signal is added thereto, the magnitude of the resulting data/dither signal may exceed the capacity of the analog to digital converter in use. In that case the analog dither signal is either gated off or reduced in magnitude, with the result that the analog to digital converter inputs either the data signal only or the data/dither signal having a magnitude not exceeding its capacity.
摘要翻译： 一种非常适合于尽可能广泛的动态范围对音频信号进行数字化的方法和装置。 将模拟抖动信号添加到模拟音频或类似数据信号以提供模拟数据/抖动信号。 该模拟数据/抖动信号和模拟抖动信号分别被转换为数字数据/抖动信号和数字抖动信号，并且数字抖动信号随后从数字数据/抖动信号中减去以获得等效的数字数据信号 到模拟数据信号。 输入的模拟数据信号的大小可能非常高，以致当将模拟抖动信号加到其上时，所得到的数据/抖动信号的幅度可能会超过使用中的模数转换器的容量。 在这种情况下，模拟抖动信号被门控或幅度减小，结果是模数转换器仅输入数据信号或数据/抖动信号的幅度不超过其容量。
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公开(公告)号：US06721248B2
公开(公告)日：2004-04-13
申请号：US09867724
申请日：2001-05-29
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。
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5.发明授权Optical disk reproducing apparatus for controlling the rotational speed of a spindle motor between a CLV control and a CAV control 失效用于在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
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。
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公开(公告)号：US5278815A
公开(公告)日：1994-01-11
申请号：US765129
申请日：1991-09-25
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。
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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。
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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
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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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10.发明授权Optical recording apparatus for recording information on a write-once disk or an erasable optical disk 失效用于在一次写入盘或可擦除光盘上记录信息的光学记录装置公开(公告)号：US06687207B2
公开(公告)日：2004-02-03
申请号：US09883670
申请日：2001-06-18
IPC分类号： G11B700
摘要： An optical disk recording apparatus for recording information onto a write-once or erasable optical disk has a memory component including a table of prerecorded correction curves consisting of recording power correction values corresponding to radial positions for each type of a variety of different optical disks, a correction component for correcting the recording power in an optimum power control operation (OPC) operation using the appropriate correction value, and a recording component for recording information onto the optical disk using the corrected recording power.
摘要翻译： 用于将信息记录在一次写入或可擦除光盘上的光盘记录装置具有存储部件，该存储部件包括预先记录的校正曲线表，该校正曲线由对应于各种不同光盘的径向位置的记录功率校正值组成， 用于使用适当的校正值在最佳功率控制操作（OPC）操作中校正记录功率的校正组件，以及用于使用校正的记录功率将信息记录到光盘上的记录组件。
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