公开(公告)号：US07873100B2

公开(公告)日：2011-01-18

申请号：US11010301

申请日：2004-12-14

申请人： Masayuki Koyama

发明人： Masayuki Koyama

IPC分类号： H04B1/707

CPC分类号： H04B1/7075 ,  H04B1/7093 ,  H04B1/7113 ,  H04B1/7117

摘要： In a reception apparatus, a matched filter that has conventionally been arranged in a searcher unit is mounted on an acquisition unit together with a large scale memory. The large scale memory once stores reception chip signals, and thereafter outputs them to the matched filter and to the delay profile calculation unit. A setting register receives an acquisition signal and outputs it to the matched filter. The matched filter performs acquisition of the reception chip signals outputted from the large scale memory, and outputs a despread timing signal to a despread circuit, a code generation circuit and the delay profile calculation unit.

公开(公告)号：US06944218B2

公开(公告)日：2005-09-13

申请号：US09858661

申请日：2001-05-17

申请人： Masayuki Koyama

发明人： Masayuki Koyama

IPC分类号： H03H17/06 ,  H03H21/00 ,  H04B3/06 ,  H03H7/30

CPC分类号： H03H21/0012

摘要： An adaptive filter includes: a plurality of delay circuits which receive a first signal, a second signal obtained by delaying the first signal, and a tap coefficient, and generates a first delay signal obtained by delaying the first signal, and a second delay signal obtained by delaying the second signal, and based upon the first delay signal and the tap coefficient, calculates a set point signal for each of the delay circuits; an addition circuit which adds the set point signals for a set point signal as a whole; and a coefficient calculation circuit which is placed in each of the delay circuits and which sequentially selects the second delay signals, and based upon the selected second delay signal and the set point signal as a whole, sequentially calculates the tap coefficients for the respective delay circuits.

摘要翻译： 自适应滤波器包括：多个延迟电路，其接收第一信号，通过延迟第一信号获得的第二信号和抽头系数，并且生成通过延迟第一信号而获得的第一延迟信号和获得的第二延迟信号 通过延迟第二信号，并且基于第一延迟信号和抽头系数，计算每个延迟电路的设定点信号; 加法电路，用于将设定点信号作为整体相加; 以及系数计算电路，其被放置在每个延迟电路中，并且依次选择第二延迟信号，并且基于所选择的第二延迟信号和设定点信号作为整体，依次计算各个延迟电路的抽头系数 。

公开(公告)号：US06845078B2

公开(公告)日：2005-01-18

申请号：US10679361

申请日：2003-10-07

申请人： Hitoshi Furuhata ,  Masayuki Koyama ,  Tomotaka Nishimura

发明人： Hitoshi Furuhata ,  Masayuki Koyama ,  Tomotaka Nishimura

IPC分类号： G02B27/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G11B7/22

CPC分类号： G11B7/1374 ,  G02B27/0025 ,  G11B7/0956 ,  G11B7/135 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/22 ,  G11B2007/0006

摘要： An optical pickup apparatus comprises a first light source for emitting a first laser beam having a first wavelength; a second light source for emitting a second laser beam having a second wavelength; and an objective lens for condensing the first laser beam and the second laser beam. The first light source and the second light source are disposed in positions in such a way that a total amount of coma aberration, which is generated on the first laser beam in accordance with a distance between the first light source and an optical axis of a whole optical system and coma aberration, which is generated on the first laser beam in accordance with a tilting amount of the objective lens becomes null, and a total amount of coma aberration, which is generated on the second laser beam in accordance with a distance between the second light source and said optical axis and coma aberration, which is generated on the second laser beam in accordance with the tilting amount of the objective lens becomes null.

摘要翻译： 一种光学拾取装置包括用于发射具有第一波长的第一激光束的第一光源; 用于发射具有第二波长的第二激光束的第二光源; 以及用于冷凝第一激光束和第二激光束的物镜。 第一光源和第二光源被设置在这样的位置，使得根据第一光源和整个光轴之间的距离在第一激光束上产生的彗差的总量 根据物镜的倾斜量在第一激光束上产生的光学系统和彗形像差成为零，以及根据第二激光束之间的距离在第二激光束上产生的彗差的总量 第二光源和根据物镜的倾斜量在第二激光束上产生的所述光轴和彗形像差变为零。

公开(公告)号：US06381723B1

公开(公告)日：2002-04-30

申请号：US09409350

申请日：1999-09-30

申请人： Masayuki Koyama

发明人： Masayuki Koyama

IPC分类号： H03M1300

CPC分类号： H04L1/0047 ,  H03M13/1535 ,  H03M13/1555 ,  H04L1/0057

摘要： In an error correction device, a chain search operation unit supplies a symbol string which has undergone error correction to a first FILO unit and supplies a symbol string which has not undergone error correction to a second FILO unit. A recovery process unit couples the first FILO unit with a de-randomizer if the error correction is normally performed and couples the second FILO unit with the de-randomizer if the error correction is not normally performed. The bit error rate is accordingly reduced compared with that of conventional devices which supply a symbol string subjected to error correction to a de-randomizer whether or not the error correction is normally made.

摘要翻译： 在纠错装置中，链条搜索操作单元向第一FILO单元提供已经经过纠错的符号串，并将未经历纠错的符号串提供给第二FILO单元。 如果正常执行错误校正，恢复处理单元将第一FILO单元与去随机器耦合，并且如果不正常执行错误校正，则将第二FILO单元与去随机器耦合。 与通常进行错误校正的经常进行纠错的符号串的常规装置相比，误码率相应地降低。

公开(公告)号：US6047004A

公开(公告)日：2000-04-04

申请号：US964354

申请日：1997-11-04

申请人： Masayuki Koyama

发明人： Masayuki Koyama

IPC分类号： H04L7/04 ,  H04J3/06 ,  H04L7/08 ,  H04L7/10 ,  H04L12/70 ,  H04N7/62 ,  H04J3/07

CPC分类号： H04N21/4302 ,  H04N21/242 ,  H04L7/0008 ,  H04L7/042 ,  H04L7/08 ,  H04L7/10

摘要： From an input data signal (Data.sub.-- In) formed of a data signal complied with the MPEG standard including unit packets each formed of a sequence of 204 pieces of 8-bit-long unit data assigned in a sequence of 6-bit-long unit data, the original packet-unit data signal is reconfigured. Data having a length of 8 bits are sequentially extracted from two 6-bit-long unit data successively held in buffers (BS1, BS2). Correctness of the position of the head word of the packet is verified on the basis of whether a synchronizing code (Cd) indicating the head word repeatedly appears in the cycles of packets. It is determined whether a cycle of a packet has passed on the basis of a value counted in synchronization with an extraction signal (Dout), eliminating the necessity for the FIFO required in conventional devices. As a result, size reduction and cost reduction of the device are implemented.

摘要翻译： 从由符合MPEG标准的数据信号形成的输入数据信号（Data-In）包括单元分组，每个单元分组由以6位长单位序列分配的204个8位长单元数据的序列形成 数据，原始分组单元数据信号被重新配置。 从连续保存在缓冲器（BS1，BS2）中的两个6位长的单位数据顺序提取长度为8位的数据。 基于分组循环中是否重复出现表示头字的同步码（Cd），来验证分组的头字的位置的正确性。 基于与提取信号（Dout）同步计数的值来确定分组的周期是否已经过去，消除了传统设备中所需的FIFO的必要性。 结果，实现了设备的尺寸减小和成本降低。

公开(公告)号：US5991913A

公开(公告)日：1999-11-23

申请号：US872155

申请日：1997-06-10

申请人： Masayuki Koyama ,  Naohiro Kobayashi

发明人： Masayuki Koyama ,  Naohiro Kobayashi

IPC分类号： H03M13/00 ,  H03M13/15

CPC分类号： H03M13/1545 ,  H03M13/1535

摘要： A bidirectional FILO capable of continuously performing the function of the FILO for different groups of codes is used to reduce a circuit scale of a Reed-Solomon error correcting device. Coefficients of an error-locator polynomial .delta.(x) and an error-evaluator polynomial .omega.(x) obtained by using a Euclid method are obtained in order from a final digit of a code to a first digit thereof. Correspondingly, a corrector starts a Chien search in order from a final byte of the code to a first byte thereof. In response to the order of the search, each group of data RSIN (Reed-Solomon Input) having digit order reversed in a bidirectional FILO are given to the corrector. The code corrected by the corrector also has digit order reversed. Therefore, the digit order is returned to original order in the bidirectional FILO for returning digit order to original order, so that a code RSOUT (Reed-Solomon Input) is output. The bidirectional FILOs can be implemented by operation of a shift register type, for example.

摘要翻译： 使用能够连续执行FILO功能的双向FILO用于不同的代码组，以减少Reed-Solomon纠错装置的电路规模。 从代码的最终位到其第一位的顺序，依次获得通过使用欧几里得方法获得的误差定位多项式δ（x）和误差评估多项式ω（x）的系数。 相应地，校正器从代码的最后字节到其第一个字节的顺序开始Chien搜索。 响应于搜索的顺序，在双向FILO中具有数字顺序颠倒的每组数据RSIN（Reed-Solomon Input）被提供给校正器。 由校正器校正的代码也有数字顺序颠倒。 因此，数字顺序在双向FILO中返回到原始顺序，以将数字顺序返回到原始顺序，从而输出代码RSOUT（里德 - 所罗门输入）。 例如，双向FILO可以通过移位寄存器类型的操作来实现。

公开(公告)号：US5798988A

公开(公告)日：1998-08-25

申请号：US758849

申请日：1996-12-02

申请人： Masayuki Koyama

发明人： Masayuki Koyama

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/08

CPC分类号： G11B7/0927 ,  G11B2007/0013 ,  G11B7/0908

摘要： An optical pickup unit that is capable of reproducing information from two types of recording media whose thickness characteristics differ from each other and can reduce heat generated due to DC offsets generated in a focus actuator, that can suppress a change of an aberration of an objective lens due to the generated heat, and that can suppress a change of its pickup performance includes an objective lens; a lens holder for holding the objective lens; a supporting member for supporting the lens holder; an error signal generator for generating a focus error signal based on the reflected light of the light beam from the recording surface upon which the light beam is being impinged; and a focus controller for actuating and controlling the objective lens such that the light beam is converged on the information recording surface based the error signal; the supporting member supporting the lens holder such that a dead-load suspension position of the lens holder is positioned at a position where an absolute value of an offset component of the error signal obtained in controlling the focus for the first recording medium is equal to an absolute value of an offset component of the error signal obtained in controlling the focus for the second recording medium.

摘要翻译： 一种光学拾取单元，其能够从其厚度特性彼此不同的两种类型的记录介质再现信息，并且可以减少由于在聚焦致动器中产生的DC偏移产生的热量，这可以抑制物镜的像差变化 由于产生的热量，并且可以抑制其拾取性能的变化，包括物镜; 用于保持物镜的透镜保持器; 用于支撑透镜保持器的支撑构件; 误差信号发生器，用于基于来自记录表面的光束的入射光产生聚焦误差信号; 以及焦点控制器，用于致动和控制物镜，使得光束基于误差信号会聚在信息记录表面上; 所述支撑构件支撑所述透镜保持器，使得所述透镜保持器的静载悬架位置位于在控制所述第一记录介质的聚焦时获得的所述误差信号的偏移分量的绝对值等于 在控制第二记录介质的焦点时获得的误差信号的偏移分量的绝对值。

公开(公告)号：US5663841A

公开(公告)日：1997-09-02

申请号：US502086

申请日：1995-07-12

申请人： Taichi Akiba ,  Osamu Ueda ,  Masayuki Koyama ,  Shigeyuki Sasanuma

发明人： Taichi Akiba ,  Osamu Ueda ,  Masayuki Koyama ,  Shigeyuki Sasanuma

IPC分类号： G11B7/09 ,  G02B7/04 ,  G11B7/095

CPC分类号： G11B7/0935 ,  G11B7/093

摘要： A holder is suspended on a carriage, and a magnetic circuit is disposed adjacent to the holder. The magnetic circuit has a first magnetic pole and a second magnetic pole. A focus coil having a magnetic flux receiving portion is provided around a vertical axis of the holder. A tacking coil having a magnetic flux receiving portion is provided around a horizontal axis of the holder. Both the magnetic flux receiving portions are disposed so as not to be overlapped with each other, and disposed in parallel with one of the surface of the first and second magnetic poles. Both of the magnetic flux receiving portions are flush with each other.

摘要翻译： 支架悬挂在支架上，并且磁路设置在支架附近。 磁路具有第一磁极和第二磁极。 具有磁通量接收部分的聚焦线圈围绕保持器的垂直轴设置。 具有磁通量接收部分的固定线圈围绕保持器的水平轴设置。 这两个磁通量接收部被配置为不彼此重叠，并且与第一和第二磁极的表面中的一个平行地设置。 两个磁通量接收部分彼此齐平。

公开(公告)号：US07124420B2

公开(公告)日：2006-10-17

申请号：US10680412

申请日：2003-10-08

申请人： Masaya Murata ,  Yuichi Mizuuchi ,  Masayuki Koyama ,  Takehiko Hayashi ,  Tsuyoshi Iwano

发明人： Masaya Murata ,  Yuichi Mizuuchi ,  Masayuki Koyama ,  Takehiko Hayashi ,  Tsuyoshi Iwano

IPC分类号： G11B7/08 ,  G11B5/40

CPC分类号： G11B7/12 ,  G11B7/121

摘要： A communication hole (55) is provided in a pickup base (51). A laser light source (61) is provided at an end of the communication hole (55). A grating (71) is provided at another end of the communication hole (55). The communication hole (55) is provided with a heat radiation path (81) which connects the inside of the communication hole (55) with the outside of the pickup base (51). Heat generated from the laser light source (61) is radiated from the heat radiation path (81).

摘要翻译： 连接孔（55）设置在拾取器基座（51）中。 激光光源（61）设置在连通孔（55）的端部。 光纤（71）设置在连通孔（55）的另一端。 连通孔55设置有将连通孔55的内部与拾取器基座51的外部连接起来的散热路径81。 从激光光源（61）产生的热量从散热路径（81）辐射。

公开(公告)号：US20050135462A1

公开(公告)日：2005-06-23

申请号：US11010301

申请日：2004-12-14

申请人： Masayuki Koyama

发明人： Masayuki Koyama

IPC分类号： H04B1/707 ,  H04B1/7093 ,  H04L7/00

CPC分类号： H04B1/7075 ,  H04B1/7093 ,  H04B1/7113 ,  H04B1/7117

摘要： In a reception apparatus, a matched filter that has conventionally been arranged in a searcher unit is mounted on an acquisition unit together with a large scale memory. The large scale memory once stores reception chip signals, and thereafter outputs them to the matched filter and to the delay profile calculation unit. A setting register receives an acquisition signal and outputs it to the matched filter. The matched filter performs acquisition of the reception chip signals outputted from the large scale memory, and outputs a despread timing signal to a despread circuit, a code generation circuit and the delay profile calculation unit.

摘要翻译： 在接收装置中，传统上配置在搜索单元中的匹配滤波器与大规模存储器一起安装在采集单元上。 大容量存储器一旦存储接收芯片信号，然后将它们输出到匹配滤波器和延迟分布计算单元。 设置寄存器接收采集信号并将其输出到匹配滤波器。 匹配滤波器执行从大尺度存储器输出的接收码片信号的获取，并且将解扩定时信号输出到去扩展电路，代码生成电路和延迟分布计算单元。