公开(公告)号：US07016286B2

公开(公告)日：2006-03-21

申请号：US10178619

申请日：2002-06-25

申请人： Atsushi Hayami ,  Tsuyoshi Oki ,  Toshio Kuroiwa

发明人： Atsushi Hayami ,  Tsuyoshi Oki ,  Toshio Kuroiwa

IPC分类号： G11B5/09

CPC分类号： H03M5/145 ,  G11B20/1426

摘要： First and second synchronous words having respective numbers of times of inversion different from each other in NRZI conversion are generated in a synchronous word generation portion, and first and second code word series data are generated by arranging code word data generated making reference to a run-length coding table after these two synchronous words. With respect to the first and second code word series data, DSV calculation results stored in two DSV calculation peak value memories corresponding to these data are compared with each other by a peak value comparison portion. Based on a comparison result, the code word series data having a smaller direct-current component generated in NRZI conversion is selected.

公开(公告)号：US06819724B2

公开(公告)日：2004-11-16

申请号：US09737597

申请日：2000-12-18

申请人： Atsushi Hayami ,  Tsuyoshi Oki

发明人： Atsushi Hayami ,  Tsuyoshi Oki

IPC分类号： H04D100

CPC分类号： H03M13/6331 ,  G11B20/10009 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/6343

摘要： A data estimating circuit outputs estimation data which estimates input data at a time earlier by a predetermined bit cycle than the input data based on decoded data series outputted from a path memory. A target value computing circuit corrects the target value with a difference between the estimation data and input data as a target value error and outputs obtained plural first target values to a branchmetric operating circuit as plural target values. Because the branchmetric operating circuit can conduct branchmetric operation based on plural first target values near plural averages having the highest incidence (having peaks in histogram), decoding performance can be improved more as compared to using fixed target values.

摘要翻译： 数据估计电路输出基于从路径存储器输出的解码数据序列，输出预测数据比预定的位周期预测输入数据的估计数据。 目标值计算电路用估计数据和输入数据之间的差作为目标值误差来校正目标值，并将获得的多个第一目标值作为多个目标值输出到分支操作电路。 由于分支操作电路可以基于具有最高入射角（具有直方图峰值）的多个平均值附近的多个第一目标值进行支路测量操作，所以与使用固定目标值相比，可以更好地提高解码性能。

公开(公告)号：US06653952B2

公开(公告)日：2003-11-25

申请号：US10160023

申请日：2002-06-04

申请人： Atsushi Hayami ,  Toshio Kuroiwa ,  Tsuyoshi Oki

发明人： Atsushi Hayami ,  Toshio Kuroiwa ,  Tsuyoshi Oki

IPC分类号： H03M700

CPC分类号： H03M5/145 ,  G11B20/1426 ,  G11B2020/1282 ,  G11B2020/1284 ,  G11B2020/143 ,  G11B2020/1457 ,  H03M7/46

摘要： There is disclosed a modulation method in which a four bit unit of a plurality of continuous input data words is encoded into a six bit unit of a plurality of continuous output code words by referring to a plurality of coding tables including output code words corresponding to input data words, and coding table designation information in which a coding table for use in encoding the next input data word is designated. The plurality of coding tables includes at least a first coding table and a second coding table, and first and second signals respectively obtained by subjecting a first output code word of said first coding table corresponding to a predetermined input data word and a second output code word of said second coding table corresponding to said predetermined input data word to NRZI modulation are reverse to each other in polarity. Further, in particular, two redundant bits are inserted into the plurality of continuous output code words for each predetermined number of corresponding data words. Even with such redundant bits, a DSV control is performed in any section, k satisfies 9 in a (1, k) RLL rule, and a repetition frequency of a minimum run is limited.

摘要翻译： 公开了一种调制方法，其中通过参考包括与输入对应的输出代码字的多个编码表，将多个连续输入数据字中的四位单位编码为多个连续输出代码字的六位单元 数据字和编码表指定信息，其中指定用于编码下一个输入数据字的编码表。 多个编码表至少包括第一编码表和第二编码表，以及分别通过对与预定输入数据字对应的所述第一编码表的第一输出代码字和第二输出代码字 对应于所述预定输入数据字到NRZI调制的所述第二编码表的极性相反。 此外，特别地，对于每个预定数量的相应数据字，两个冗余比特被插入到多个连续输出码字中。 即使使用这样的冗余比特，在任何部分都执行DSV控制，在（1，k）RLL规则中k满足9，并且限制最小运行的重复频率。

公开(公告)号：US06963296B2

公开(公告)日：2005-11-08

申请号：US10073397

申请日：2002-02-12

申请人： Tsuyoshi Oki ,  Atsushi Hayami

发明人： Tsuyoshi Oki ,  Atsushi Hayami

IPC分类号： G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  G11B27/30 ,  H03M5/14 ,  H03M7/14 ,  H03M13/27 ,  H03M7/00

CPC分类号： H03M13/27 ,  G11B20/1426 ,  G11B20/18 ,  G11B20/1833 ,  G11B20/1866 ,  G11B27/3027 ,  G11B2020/1457 ,  G11B2220/2562 ,  H03M5/145

摘要： There is disclosed a recording method for performing a DSV control while recording a recording signal generated by inserting a synchronous signal for decoding reproduction data into every predetermined number of code words in a code word string satisfying a predetermined run length restriction rule and to be outputted into a recording medium, when a plurality of coding tables are used to convert an input data word of p-bits to a code word of q-bits (q>p), and the code word string obtained by directly coupling the code words is recorded and reproduced in a recording medium such as an optical disk and magnetic disk, or transmitted via a transmitting portion, wherein the p-bits are 8 bits, the q-bits are 15 bits, and the predetermined run length restriction rule stipulates that a minimum run length of the signal obtained by NRZI-converting the code word excluding the synchronous signal is 3T, and a maximum run length is any one of 11T, 12T, 13T, and 14T.

摘要翻译： 公开了一种记录方法，用于在记录通过将再现数据解码的同步信号插入到满足规定游程长度限制规则的码字串中的每个预定数量的码字而产生的记录信号的同时，并将其输出 记录介质，当使用多个编码表将p位的输入数据字转换为q位（q> p）的代码字时，并且记录通过直接耦合代码字获得的代码字串 并且在诸如光盘和磁盘的记录介质中再现，或者经由发送部分发送，其中p位是8位，q位是15位，并且预定的行程长度限制规则规定最小值 通过NRZI转换除了同步信号之外的码字获得的信号的游程长度为3T，最大游程长度为11T，12T，13T和14T中的任何一个。

公开(公告)号：US06492920B2

公开(公告)日：2002-12-10

申请号：US09983948

申请日：2001-10-26

申请人： Tsuyoshi Oki ,  Atsushi Hayami

发明人： Tsuyoshi Oki ,  Atsushi Hayami

IPC分类号： H03M700

CPC分类号： G11B20/1426 ,  G11B2020/1461 ,  G11B2020/1465 ,  G11B2020/1473

摘要： A coding table portion includes six coding tables each storing a code word and status information indicating a coding table for use in modulating a next input data word in order to obtain a next code word which satisfies a predetermined run length restriction rule even if the next code word is coupled directly with the preceding code word, corresponding to each input data word. In the coding table portion, the code words and status informations allocated corresponding to input data words of a number set up preliminarily in succession from the highest appearance frequency to a lower one in one or more coding tables of the plural coding tables are replaced with code words having smaller RDSs and status informations allocated corresponding to other input data words in the same coding table. Consequently, the input data word is modulated using the six coding tables.

摘要翻译： 编码表部分包括六个编码表，每个编码表存储代码字和指示用于调制下一个输入数据字的编码表的状态信息，以获得满足预定行程长度限制规则的下一个代码字，即使下一个代码 字直接与先前的代码字耦合，对应于每个输入数据字。 在编码表部分中，将与多个编码表的一个或多个编码表中的从最高出现频率连续预先设置的数字的输入数据字分配的代码字和状态信息替换为代码 在相同的编码表中对应于其他输入数据字分配的具有较小RDS和状态信息的字。 因此，使用六个编码表调制输入数据字。

公开(公告)号：US06898166B2

公开(公告)日：2005-05-24

申请号：US10054786

申请日：2002-01-25

申请人： Tsuyoshi Oki ,  Atsushi Hayami

发明人： Tsuyoshi Oki ,  Atsushi Hayami

IPC分类号： G11B20/14 ,  G11B27/30 ,  H03M5/14 ,  H03M7/14 ,  H03M7/46 ,  H04L7/08 ,  H04L25/49 ,  G11B7/05 ,  H03M7/00

CPC分类号： H03M7/46 ,  G11B20/1426 ,  G11B27/3027 ,  G11B2220/2562 ,  H03M5/145

摘要： There is disclosed a synchronous signal generating method, recording apparatus, transmitting apparatus, recording medium and transmission medium in which a plurality of coding tables is used to convert an input data word of p-bits to a code word of q-bits (q>p), and a code word string obtained by directly coupling the code words is recorded and reproduced in a recording medium such as an optical disk and magnetic disk, or transmitted via a transmitting portion. A synchronous frame consists of a synchronous signal and the cord word string satisfying restriction on minimum run length and maximum run length. The synchronous signal is separable from the code word string satisfying a predetermined run length restriction rule, and is constituted with a specific code for identifying its position in one sector, and a synchronous pattern consisting of a first bit pattern having a run length longer than the maximum run length of the predetermined run length restriction rule by 1T or more, and a following second bit pattern having a run length longer than the minimum run length.

摘要翻译： 公开了一种同步信号生成方法，记录装置，发送装置，记录介质和传输介质，其中使用多个编码表将p位的输入数据字转换为q位的码字（q> p），并且通过直接耦合码字获得的码字串被记录和再现在诸如光盘和磁盘的记录介质中，或者经由发送部分发送。 同步帧由同步信号和绳字符串组成，满足最小游程长度和最大游程长度的限制。 该同步信号与满足规定游程长度限制规则的代码字串可分离，并且由用于识别其在一个扇区中的位置的特定代码构成，并且由具有长于该扇区长度的游程长度的第一位模式组成的同步模式 预定游程长度限制规则的最大游程长度为1T以上，以及具有比最小游程长度更长的游程长度的后续第二比特模式。

公开(公告)号：US08419575B2

公开(公告)日：2013-04-16

申请号：US13081124

申请日：2011-04-06

申请人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

发明人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

CPC分类号： F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0859

摘要： A tensioner for a chain or similar power transmission medium comprises a spring-biased plunger having annular rack teeth with gradually sloping forward surfaces and steeper rearward surfaces. The teeth are engaged by radially movable balls received in inclined grooves in an axially movable annular ball seat disposed in an annular groove formed in the wall of a plunger-accommodating hole in a tensioner housing. The bottoms of the inclined grooves face a steep rearward surface of a rack tooth, and the annular ball seat is axially movable in the annular groove and biased in the plunger protruding direction by a spring that exerts a biasing force greater than the biasing force exerted on the plunger. The balls and the movable annular ball seat block retraction of the plunger on engine start-up, but permit retraction when excessive force is imparted to the plunger while the plunger is in a protruding condition.

摘要翻译： 用于链式或类似动力传递介质的张紧器包括具有环形齿条齿的弹簧偏置柱塞，其具有逐渐倾斜的前表面和更陡的后表面。 这些齿通过容纳在设置在形成在张紧器壳体中的柱塞容纳孔的壁中的环形槽中的可轴向移动的环形球座中的倾斜槽中接收。 倾斜槽的底部面向齿条齿的陡峭的后表面，并且环形球座可在环形槽中轴向移动，并通过弹簧施加偏压力，该弹簧施加在柱塞突出方向上，该弹簧施加大于施加在 柱塞。 球和可动环形球座座在发动机启动时柱塞缩回，但是当柱塞处于突出状态时，当柱塞施加过大的力时允许回缩。

公开(公告)号：US20120295747A1

公开(公告)日：2012-11-22

申请号：US13468073

申请日：2012-05-10

申请人： Yuichiri Ishikawa ,  Atsushi Hayami ,  Tadashi Shintani

发明人： Yuichiri Ishikawa ,  Atsushi Hayami ,  Tadashi Shintani

IPC分类号： F16H7/18

CPC分类号： F16H7/18 ,  F16H2007/0872

摘要： An elongated stationary guide for a traveling transmission chain in an engine such as a timing chain has a narrow reinforcing groove formed along the longitudinal direction of a metal base plate of the guide by surface-pressing, whereby the base plate exhibits plastic deformation. The narrow reinforcing groove extends toward the ends of the base plate past the locations at which the base plate is mounted on an engine block by mounting bolts.

摘要翻译： 用于诸如正时链条的发动机中的行进传动链的细长固定引导件具有通过表面压制沿着引导件的金属基板的纵向方向形成的窄的加强槽，由此基板呈现塑性变形。 狭窄的加强槽通过安装螺栓朝基板的端部延伸穿过基板安装在发动机缸体上的位置。

公开(公告)号：US20110021298A1

公开(公告)日：2011-01-27

申请号：US12829706

申请日：2010-07-02

申请人： Yuji Kurematsu ,  Atsushi Hayami

发明人： Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0891

摘要： In a chain tensioner, an expansible ring is disposed in an internal groove formed in the inner wall of a plunger-accommodating hole near an open end thereof. The ring cooperates with grooves formed on the plunger to exert a ratchet action. The relationship between the angles of the surfaces of the internal groove and the grooves on the plunger allows the plunger to protrude, restricts retraction of the plunger on start-up of a chain transmission, but allows retraction when chain tension becomes excessive. In one embodiment, in which the ring is a C-ring, the tensioner housing can be formed with external threads for mounting in a threaded hole on a timing chain cover or other engine part. In other embodiments, the ring can have externally protruding levers for manipulation of the ring.

摘要翻译： 在链条张紧器中，可膨胀的环设置在形成在其开口端附近的柱塞容纳孔的内壁中的内槽中。 环与形成在柱塞上的凹槽配合以施加棘轮动作。 内槽的表面和柱塞上的槽之间的关系允许柱塞突出，限制链条传动装置启动时柱塞的缩回，但当链张力过大时允许缩回。 在其中环是C形环的一个实施例中，张紧器壳体可以形成有外螺纹，用于安装在正时链盖或其它发动机部件上的螺纹孔中。 在其他实施例中，环可以具有用于操纵环的外部突出的杠杆。

公开(公告)号：US20090036242A1

公开(公告)日：2009-02-05

申请号：US12128175

申请日：2008-05-28

申请人： Atsushi Hayami ,  Tomoya Iwata

发明人： Atsushi Hayami ,  Tomoya Iwata

IPC分类号： F16H7/08

CPC分类号： F16H7/18 ,  F16H2007/0872

摘要： A chain guide is composed of a resin shoe engageable with an aluminum base frame. The shoe has a hook formed at a chain entry end for engagement with a chain entry end of the base frame, and a C-shaped hook at the chain exit end engageable with a side edge of the base frame. The shoe is engaged with the base by first engaging the C-shaped hook with the side edge of the base frame, then flexing the chain entry end of the shoe until the hook at the chain entry end can receive the chain entry end of the base. The shoe is moved a short distance toward the chain exit end of the base until a projection formed on a back surface of the shoe near the chain entry end snaps into a depression formed on a front surface of the base frame, locking the shoe and base together.

摘要翻译： 链条引导件由可与铝基框架接合的树脂靴构成。 鞋具有形成在链条入口端处的钩子，用于与基部框架的链条进入端接合，并且在链条出口端处的C形钩可与基部框架的侧边缘接合。 通过首先使C形钩与基座的侧边缘接合，然后使鞋的链条进入端弯曲，直到链条进入端的钩子可以接收底座的链条进入端，鞋与底座接合 。 鞋子朝向基座的链条出口端移动很短的距离，直到形成在靠近链条进入端的鞋的后表面上的突起卡入形成在基座框架的前表面上的凹陷中，锁定鞋和底座 一起。