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51. 发明申请

US20070025232A1 Optical disk apparatus 失效
标题翻译：光盘装置
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。

52. 发明授权

US07151723B2 Optical disc device 失效
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.

53. 发明申请

US20060140085A1 Optical disk apparatus for recording data on multilayer optical disk 失效
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.

54. 发明申请

US20060077820A1 Optical disk apparatus 失效
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.

55. 发明申请

US20050237870A1 Optical disk device 审中-公开
标题翻译：光盘装置
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。

56. 发明授权

US06680892B2 Optical disk device offsetting a wobble signal component superimposed on an RF signal and the wobble signal component added in a threshold value upon making the RF signal binary 失效
标题翻译：光盘装置在叠加在RF信号上的摆动信号分量和在产生RF信号二进制时以阈值相加的摆动信号分量
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。

57. 发明授权

US5359589A Optical information recording and reproducing apparatus having functions for adjusting intensity of light beam 失效
标题翻译：具有用于调整光束强度的功能的光信息记录和再现装置
公开(公告)号：US5359589A
公开(公告)日：1994-10-25
申请号：US535893
申请日：1990-06-11
申请人： Akira Mashimo
发明人： Akira Mashimo
IPC分类号： G11B7/0045 , G11B7/125 , G11B11/105 , G11B7/00
CPC分类号： G11B7/126 , G11B11/10595 , G11B7/0045
摘要： An apparatus for recording and reproducing information on and from a rotary information recording disc by using a light beam includes an intensity detector for detecting a recording light intensity which is the intensity of the light beam at the time of recording information on the basis of a reproduction signal obtained by projecting the light beam onto the rotary information recording disc at the time of reproducing information, a comparator for comparing the recording light intensity with a predetermined optimum value and giving a comparison result, and an adjuster for adjusting an intensity of the light beam at the time of recording information, so that the intensity of the light beam at the time of recording information becomes the optimum value.
摘要翻译：用于通过使用光束在旋转信息记录盘上记录和再现信息的装置包括：强度检测器，用于检测作为基于再现的记录信息时的光束的强度的记录光强度通过在再现信息时将光束投影到旋转信息记录盘上获得的信号;比较器，用于将记录光强与预定的最佳值进行比较并给出比较结果;以及调节器，用于调整光束的强度在记录信息时，使得记录信息时光束的强度成为最佳值。

58. 发明授权

US5283774A Optical disk storage having focus servocontrol system in accordance with astigmatism method 失效
标题翻译：具有聚焦伺服控制系统的光盘存储器按照散光法
公开(公告)号：US5283774A
公开(公告)日：1994-02-01
申请号：US764711
申请日：1991-09-24
申请人： Akira Mashimo
发明人： Akira Mashimo
IPC分类号： G11B7/095 , G11B7/09
CPC分类号： G11B7/094 , G11B7/0943
摘要： An optical disk storage has a focus servocontrol system in accordance with an astigmatism method. Thus, the optical disk storage uses a cylindrical lens and a photosensor. The optical disk storage corrects an error generated by a light amount distribution offset of an optical beam to be radiated on the photosensor used for the focus servocontrol, so that a normal control signal can be generated and the recording/reproducing performance of the optical disk storage does not deteriorate. The optical disk storage calculates an offset amount between a center of the light amount distribution of the optical beam radiated on the radiation surface of the photosensor and a center of the photosensor.
摘要翻译：光盘存储器具有根据像散方法的聚焦伺服控制系统。因此，光盘存储器使用柱面透镜和光电传感器。光盘存储器校正由用于聚焦伺服控制的光传感器上要辐射的光束的光量分布偏移产生的误差，从而可以产生正常的控制信号和光盘存储器的记录/再现性能不会恶化光盘存储器计算辐射在光传感器的辐射表面上的光束的光量分布的中心与光传感器的中心之间的偏移量。

59. 发明授权

US4896221A Optical disc reproducing apparatus having speed-change reproduction mode 失效
标题翻译：具有变速再现模式的光盘再现装置
公开(公告)号：US4896221A
公开(公告)日：1990-01-23
申请号：US208879
申请日：1988-06-20
申请人： Akira Mashimo
发明人： Akira Mashimo
IPC分类号： H04N5/85 , G11B7/00 , G11B7/005 , G11B7/085
CPC分类号： G11B7/08505
摘要： An optical disc reproducing apparatus reproduces a pre-recorded signal from an intended track of an optical disc by detecting reflected light beams to main and sub light beams reflected from the optical disc, where the main light beam is irradiated as a main beam spot on the track while the sub light beams are irradiated as sub beam spots at intermediate portions between two successive tracks one of which is the intended track. The main beam spot jumps from the intended track to an adjacent track at a predetermined rate while maintaining a relative positional relationship of the main and sub beam spots in a speed-change mode. The optical disc reproducing apparatus comprises terminals for receiving first and second reproduced signals detected from the reflected light beams of the main light beam and at least one of the sub light beams reflected from the optical disc, a delay part for matching timings of the first and second reproduced signals by delaying at least one of the two signals, and a selecting part supplied with the first and second reproduced signals from the delay part for selectively outputting the first reproduced signal during a time when no jump is made and for selectively outputting the second reproduced signal for a predetermined time after a jump starts.
摘要翻译：光盘再现装置通过检测从光盘反射的主光束和副光束的反射光，再现来自光盘的预期轨迹的预先记录的信号，其中主光束作为主光束照射在轨道，而副光束作为子光束点照射在两个连续轨道之间的中间部分，其中一个是预期轨道。主波束点以预定速率从预期轨道跳到相邻轨道，同时保持速度变化模式下主波束点和副波束点的相对位置关系。光盘再现装置包括用于接收从主光束的反射光束和从光盘反射的至少一个子光束检测到的第一和第二再现信号的端子，用于匹配第一和第二光束的定时的延迟部分通过延迟所述两个信号中的至少一个信号的第二再现信号，以及从所述延迟部分提供有所述第一和第二再现信号的选择部分，用于在没有跳跃的时间期间选择性地输出所述第一再现信号，并且用于选择性地输出所述第二再现信号再现信号在跳转开始之后的预定时间。

60. 发明授权

US4864423A Information recording disc and information signal recording apparatus therefor 失效
标题翻译：信息记录盘及其信息信号记录装置
公开(公告)号：US4864423A
公开(公告)日：1989-09-05
申请号：US272769
申请日：1988-11-17
申请人： Tadao Nagai , Hirohisa Yamaguchi , Akira Mashimo
发明人： Tadao Nagai , Hirohisa Yamaguchi , Akira Mashimo
IPC分类号： G11B27/10 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B7/09 , H04N5/92 , H04N9/835
CPC分类号： H04N9/8355 , G11B7/004 , G11B7/0938 , H04N5/9201
摘要： An information recording disc has a control signal such as an address signal pre-recorded on a guide track which is pre-formed on the information recording disc at a position different from a track position where an information signal is to be recorded. An information signal recording apparatus for recording the information signal on such an information recording dics controls a rotation frequency of the information recording disc to a constant rotation frequency by locking a horizontal synchronizing signal within a composite video signal to edges of pulses reproduced from the guide track, and the information signal is recorded on the information recording disc so that a recording interval of the control signal is positioned within a vertical blanking period of the information signal at least including the composite video signal.
摘要翻译：信息记录盘具有诸如预先记录在导轨上的地址信号的控制信号，该导轨在信息记录盘上预先形成在与要记录信息信号的轨道位置不同的位置处。用于在这种信息记录装置上记录信息信号的信息信号记录装置通过将复合视频信号内的水平同步信号锁定在从导轨再现的脉冲的边缘上来控制信息记录盘的旋转频率到恒定的旋转频率并且信息信号被记录在信息记录盘上，使得控制信号的记录间隔位于至少包括复合视频信号的信息信号的垂直消隐期内。

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