公开(公告)号：US07817527B2

公开(公告)日：2010-10-19

申请号：US11796538

申请日：2007-04-26

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/24

CPC分类号： G11B7/0045 ,  G11B7/00736 ,  G11B7/1267 ,  G11B7/24082 ,  G11B2007/0013

摘要： Recording of data into a multilayer optical disk and reliable reproduction of the data are enabled. When user data are recorded on a multilayer optical disk having a first layer L0 and a second layer L1, the second layer L1 is formatted beforehand, to thus record dummy data. Subsequently, the user data are recorded into the first layer L0. Even after completion of recording of the user data at some point in the first layer L0, an area of the second layer L1 located immediately above or below a recorded area of the first layer L0 remains in a recorded state at all times. Compatibility with a play-only disk is maintained, and the play-only drive can reproduce the user data immediately after recording of the data.

摘要翻译： 将数据记录到多层光盘中并可靠地再现数据。 当将用户数据记录在具有第一层L0和第二层L1的多层光盘上时，预先格式化第二层L1，从而记录虚拟数据。 随后，将用户数据记录到第一层L0中。 即使在第一层L0中的某一点记录用户数据之后，位于第一层L0的记录区域的正上方或下方的第二层L1的区域始终保持在记录状态。 与仅播放磁盘的兼容性保持不变，只播放驱动器可以在记录数据后立即再现用户数据。

公开(公告)号：US07411879B2

公开(公告)日：2008-08-12

申请号：US11177137

申请日：2005-07-08

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B27/24 ,  G11B20/1803 ,  G11B2020/1843 ,  G11B2220/2579

摘要： An optical disk device which drives an HD-DVD or the like. When recording or reproducing data with respect to an optical disk of HD-DVD, the address information is demodulated by an address decoding circuit and is supplied to a system controller. The system controller performs error checking using the CRC technique. When a resulting CRC value does not correspond to CRC bits, the system controller regards a bit in which the number of waves in wobbles having the same phase is not four, which is a predetermined value, as an error bit, and performs bit data replacement with respect to the error bit. Specifically, the system controller searches for a combination of bit values by which a resulting CRC value matches the CRC bits, thereby performing error correction. At this time, the system controller tries the data value replacement preferentially using a combination of bit values by which the address is advanced by one address from the immediately previous address which is fixed among all the possible combinations with respect to the error bits.

摘要翻译： 驱动HD-DVD等的光盘装置。 相对于HD-DVD的光盘记录或再现数据时，地址信息由地址解码电路解调并提供给系统控制器。 系统控制器使用CRC技术执行错误检查。 当所得到的CRC值不对应于CRC比特时，系统控制器将具有相同相位的摆动中的波数不是作为预定值的四位的比特作为错误比特，并执行比特数据替换 相对于错误位。 具体地，系统控制器搜索所得到的CRC值与CRC比特匹配的比特值的组合，从而进行纠错。 此时，系统控制器优先使用比特值的组合来尝试数据值替换，通过该组合，地址由相对于错误比特的所有可能组合中固定的紧前一个地址的一个地址提前。

公开(公告)号：US07304924B2

公开(公告)日：2007-12-04

申请号：US10877365

申请日：2004-06-25

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/00718 ,  G11B7/24082 ,  G11B20/10 ,  G11B20/1258 ,  G11B27/24 ,  G11B2020/1268 ,  G11B2020/1292 ,  G11B2220/2537

摘要： A high-definition optical disk device for recording and reproducing data with respect to lands and grooves of an optical disk. The grooves and the lands of the optical disk are wobbled, and address information is embedded in gray code. In the grooves and the lands, both groove track address systems and land track address systems are embedded and form redundant systems. When detecting the address of a land, in addition to demodulation of the address data from the land track address system, the address data is also extracted from the groove track address system. The address data thus extracted is used for verification to detect an error in the demodulated address data.

摘要翻译： 一种高分辨率光盘装置，用于相对于光盘的平台和凹槽记录和再现数据。 光盘的凹槽和平台摇摆，地址信息嵌入灰色代码。 在凹槽和土地上，凹槽轨道地址系统和陆地轨道地址系统都被嵌入并形成冗余系统。 当检测到地面的地址时，除了从陆地轨道地址系统解调地址数据之外，还从凹槽轨道地址系统中提取地址数据。 这样提取的地址数据用于验证以检测解调地址数据中的错误。

公开(公告)号：US20070025232A1

公开(公告)日：2007-02-01

申请号：US11493462

申请日：2006-07-25

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/24082 ,  G11B20/10 ,  G11B20/14 ,  G11B27/24 ,  G11B2220/2541

摘要： To detect an MSK modulation mark from an MSK-modulated wobble signal without fail. A wobble signal of an optical disk is supplied to an address decoding circuit. The address decoding circuit performs exclusive-OR operation of a binarized wobble signal and a reference clock signal generated from the wobble signal by an PLL circuit, to thus compute a proportion of the exclusive-OR result assuming a value of one every half period of a reference clock signal. When there are continuously present a predetermined number of sections or more where a proportion becomes a predetermined threshold proportion or more, the sections are detected as an MSK modulation mark. A system controller changes the threshold proportion in accordance with crosstalk from an adjacent track.

摘要翻译： 从MSK调制的摆动信号中检测出MSK调制标记，而不会失败。 光盘的摆动信号被提供给地址解码电路。 地址解码电路通过PLL电路进行二进制摆动信号和由摆动信号产生的参考时钟信号的异或运算，从而计算出异或结果的比例，假设每半个周期的值为1 参考时钟信号。 当连续存在预定数量的部分或更多部分，其中比例成为预定阈值比例或更多时，这些部分被检测为MSK调制标记。 系统控制器根据来自相邻轨道的串扰改变阈值比例。

公开(公告)号：US07151723B2

公开(公告)日：2006-12-19

申请号：US09940349

申请日：2001-08-27

申请人： Norikazu Takasaka ,  Akira Mashimo

发明人： Norikazu Takasaka ,  Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0055 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943

摘要： An optical disc device for changing intensities of light beams illuminated on an optical disc. The optical disc device comprises the following elements. A photo detecting device divided into a plurality of photo detectors is used for detecting the reflected light beams illuminated on an optical disc. A plurality of amplifiers is used for changing gains to respectively amplify the output signals of the photo detectors when recording and reproducing on/from the optical disc. A calculating device is used for calculating the output signals of the amplifiers to generate the servo signals. By adding the correction offset signals for correcting the offset voltages of the amplifiers and the photo detectors to the amplifiers, the correction offset signals are amplified. It is, therefore, not necessary to change the correction offset voltages even though the gain of the amplifier is changed and not necessary to change the offset voltage and is independent of the gain-switching of the amplifier.

公开(公告)号：US20060140085A1

公开(公告)日：2006-06-29

申请号：US11313510

申请日：2005-12-20

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B5/09

CPC分类号： G11B7/126 ,  G11B7/00454 ,  G11B7/24038

摘要： When recording data on a multilayer optical disk, the recording power for a recording layer provided further from the laser beam incident side is optimized. An optical disk includes a first layer and a second layer. When recording data onto the second layer, the amount of return light at the space forming time is detected, and whether the first layer is in an unrecorded state or in a recorded state is determined in accordance with the level of the amount of return light. Then, the recording power for the second layer is changed in accordance with the determination result regarding the unrecorded/recorded state of the first layer. If the transmittance of the first layer decreases as a result of data recording, the recording power for the second layer in a case where the first layer is in the recorded state is set greater than the recording power for the second layer in a case where the first layer is in the unrecorded state. Because the recording power is changed in accordance with the determination result regarding the state of the first layer, the order of recording data in the first layer and the second layer can be set as desired.

公开(公告)号：US20060077820A1

公开(公告)日：2006-04-13

申请号：US11235789

申请日：2005-09-27

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B19/02

CPC分类号： G11B20/1403 ,  G11B2020/1287

摘要： An optical disk apparatus for recording data on an optical disk having a land pre-pit (LPP). An encoder of a DVD-R/RW drive records data while inserting synchronization information having a length of 14T at the top of a synchronous frame. The encoder sets synchronization information of the i-th frame (wherein i is an integer which is 0 or greater) and the (i+1)th frame of a plurality of consecutive frames to either a mark or a space such that each DSV is minimized. The encoder sets the synchronization information of the (i+2)th frame such that the polarity of the synchronization information of the (i+2)th frame is opposite to the polarity of the synchronization information of the i-th frame, and sets the synchronization information of (i+3)th frame such that the polarity of the synchronization information of (i+3)th frame is opposite to the polarity of the synchronization information of the (i+1)th frame. In this manner, the synchronization information of one of two frames, whether they are two odd frames or two even frames, is always set to a space.

公开(公告)号：US20050237870A1

公开(公告)日：2005-10-27

申请号：US11116883

申请日：2005-04-27

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/004 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/005 ,  G11B7/007 ,  G11B7/095 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30

CPC分类号： G11B27/24 ,  G11B7/00375 ,  G11B7/24082 ,  G11B2220/2579

摘要： An optical disk device which uses address information to perform a checking process on an optical disk. In an HD-DVD optical disk, data is recorded in both grooves and lands. A groove (G) track address system which is exclusively used for a groove is formed in a groove track and a land (L) track address system which is exclusively used for a land is formed in a land track. When the address of a target groove track is determinate and fixed to n, the optical disk device reads address information of the L track address system in the groove track and determines whether or not the address which is read corresponds to n or n−1. When the address which is read corresponds to n or n−1, the optical disk is determined to be normal. When the address which is read does not correspond to n or n−1, it is determined that the optical disk is defective.

摘要翻译： 一种使用地址信息对光盘进行检查处理的光盘装置。 在HD-DVD光盘中，数据被记录在两个凹槽和凹槽中。 专门用于凹槽的凹槽（G）轨道地址系统形成在凹槽轨道中，并且专门用于脊台的脊（L）轨道地址系统形成在脊轨道中。 当目标凹槽轨道的地址确定并固定为n时，光盘装置读取凹槽轨道中的L轨道地址系统的地址信息，并确定读取的地址是否对应于n或n-1。 当读取的地址对应于n或n-1时，光盘被确定为正常。 当读取的地址不对应于n或n-1时，确定光盘有故障。

公开(公告)号：US06680892B2

公开(公告)日：2004-01-20

申请号：US09994715

申请日：2001-11-28

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B700

CPC分类号： G11B20/1403 ,  G11B7/005 ,  G11B27/24 ,  G11B2220/218 ,  G11B2220/2545

摘要： An optical disk device reproduces an RF signal by projecting a light beam on an optical disk and detecting a reflected light therefrom. On the optical disk, information is recorded by forming a pit on a track determined according to a groove having a wobble signal recorded thereon. The optical disk device comprises a comparator comparing the RF signal with a threshold value so as to output a binary signal, a first band-pass filter filtering a frequency band of the wobble signal from the binary signal so as to extract a wobble signal component, and a first adder obtaining a value by adding the wobble signal component to a fixed reference value so as to supply the value to the comparator as the threshold value.

摘要翻译： 光盘装置通过将光束投射在光盘上并从其检测反射光来再现RF信号。 在光盘上，通过在根据其上记录有摆动信号的凹槽确定的轨道上形成凹坑来记录信息。 光盘装置包括比较RF信号与阈值以便输出二进制信号的比较器，从二进制信号中滤除摆动信号的频带的第一带通滤波器，以提取摆动信号分量， 以及第一加法器，通过将摆动信号分量相加到固定的参考值来获得值，以便将该值提供给比较器作为阈值。

公开(公告)号：US5481517A

公开(公告)日：1996-01-02

申请号：US93440

申请日：1993-07-16

申请人： Kyosuke Yoshimoto ,  Yoshiki Nakajima ,  Kimiyuki Koyanagi ,  Osamu Ito ,  Akira Mashimo ,  Hiroyuki Onda ,  Yutaka Kobayashi ,  Koji Yamana

发明人： Kyosuke Yoshimoto ,  Yoshiki Nakajima ,  Kimiyuki Koyanagi ,  Osamu Ito ,  Akira Mashimo ,  Hiroyuki Onda ,  Yutaka Kobayashi ,  Koji Yamana

IPC分类号： G11B21/08 ,  G11B7/085 ,  G11B7/00

CPC分类号： G11B7/08517

摘要： The disk drive apparatus of the present invention has an optical pickup that jumps a track to perform track jumping when a jumping voltage is impressed, and that traces a track by performing brake operation when a braking voltage is applied, and actuator that drives the optical pickup, a signal processing part that performs focus and tracking control with respect to the optical pickup, a movement time measurement part that measures the movement time when a light beam emitted from the optical pickup is moved to cross a track to a required track, a voltage control part that uses the results of measurement to generate parameters and a voltage value that is applied to the actuator, a storage part that stores voltage value that is generated by the voltage value setting part, and that after a disk is loaded, first stores data of that disk in the storage part and uses those data values according to the track jump operation.

摘要翻译： 本发明的磁盘驱动装置具有跳跃轨道的光拾取器，当施加跳跃电压时进行轨道跳跃，并且当施加制动电压时通过执行制动操作来跟踪轨道，以及驱动光学拾取器的致动器 执行相对于光学拾取器的聚焦和跟踪控制的信号处理部件，测量从光学拾取器发射的光束移动到所需轨道的轨迹的移动时间的移动时间测量部件，电压 使用测量结果的控制部件生成参数和施加到致动器的电压值，存储部分，其存储由电压值设定部分产生的电压值，以及在盘装载之后首先存储数据 并且根据轨道跳转操作使用那些数据值。