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21. 发明授权

US5914920A Constant angular velocity type optical disk, double density recording method therefor, and reproducing method for such recorded optical disk 失效
标题翻译：恒定角速度型光盘，双重密度记录方法和这种记录光盘的再现方法
公开(公告)号：US5914920A
公开(公告)日：1999-06-22
申请号：US122611
申请日：1993-09-15
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B7/00 , G11B7/004 , G11B7/007 , G11B7/09 , G11B21/10 , G11B7/095
CPC分类号： G11B7/00745 , G11B7/0901 , G11B7/0938
摘要： There is disclosed a double density recording method for a constant angular velocity type optical disk in which a data information area for recording data information and a servo information area for recording servo control information are provided in recording tracks of the optical disk, pairs of wobble pits for tracking servo control being provided in a staggered form in the servo control area in such a manner that the center axes of the recording tracks are put between the respective pairs of wobble pits, the method being adapted to carry out a subtractive operation of reflected light signals from the respective wobble pits to generate a tracking error signal to thereby conduct a tracking servo control, and to record data information under such a tracking servo control, wherein the respective pair of wobble pits are provided in such a manner that they are shared as wobble pits of adjacent recording tracks, and the wobble pits are provided in a staggered form in a radial direction of the optical disk.
摘要翻译：公开了一种用于恒定角速度型光盘的双重密度记录方法，其中用于记录数据信息的数据信息区域和用于记录伺服控制信息的伺服信息区域被提供在光盘的记录轨道，摆动凹坑对用于跟踪以伺服控制区域中的交错形式提供的伺服控制，使得记录轨道的中心轴位于各对摆动凹坑之间，该方法适于执行反射光的减法操作来产生跟踪误差信号，从而进行跟踪伺服控制，并在这种跟踪伺服控制下记录数据信息，其中相应的摆动凹坑对以这样一种方式被提供，使得它们被共享为相邻记录轨道的摆动凹坑，并且摆动凹坑以交错形式沿径向方向光盘。

22. 发明授权

US5740152A Spindle servo circuit in an apparatus for playing an optical disk having synchronous marks and data marks satisfying certain criteria 失效
标题翻译：用于播放具有满足特定标准的同步标记和数据标记的光盘的装置中的主轴伺服电路
公开(公告)号：US5740152A
公开(公告)日：1998-04-14
申请号：US794018
申请日：1997-02-03
申请人： Fumihiko Yokogawa , Hideki Hayashi
发明人： Fumihiko Yokogawa , Hideki Hayashi
IPC分类号： G11B7/24 , G11B7/007 , G11B7/013 , G11B19/06 , G11B19/12 , G11B19/247 , G11B19/28 , G11B20/10 , G11B20/14 , G11B27/19 , G11B27/24 , G11B27/30
CPC分类号： G11B7/00745 , G11B19/12 , G11B19/247 , G11B19/28 , G11B20/1403 , G11B20/1426 , G11B27/19 , G11B27/24 , G11B27/3027 , G11B7/24085 , G11B2220/20
摘要： An optical disk having a recording format for a sampled servo system and including a servo field which is preformatted, including synchronous marks for synchronizing detection, and a data field for recording data on each track. The length of the synchronous mark is defined to render the detection of the synchronous pattern possible by making it easily distinguishable from the maximum inversion interval in the data even if the optical disk is of the constant-linear-velocity (CLV) type.
摘要翻译：具有采样伺服系统的记录格式的光盘，包括预格式化的伺服字段，包括用于同步检测的同步标记，以及用于在每个轨道上记录数据的数据字段。定义同步标记的长度，以便即使光盘是恒定线速度（CLV）类型，也可以通过使其容易地与数据中的最大反转间隔区分，来使得同步模式的检测成为可能。

23. 发明授权

US5617406A Optical disc with heat blocking bands between tracks 失效
标题翻译：轨道之间具有热阻带的光盘
公开(公告)号：US5617406A
公开(公告)日：1997-04-01
申请号：US391445
申请日：1995-02-21
申请人： Nobuaki Onagi , Fumihiko Yokogawa
发明人： Nobuaki Onagi , Fumihiko Yokogawa
IPC分类号： G11B7/24 , G11B7/007 , G11B7/013 , G11B7/09 , G11B11/10 , G11B11/105
CPC分类号： G11B11/10584 , G11B11/10565 , G11B11/10578 , G11B7/007 , G11B7/00745 , G11B7/0938 , G11B7/24085
摘要： An optical disc has a plurality of tracks arranged in a radical direction of the disc. On each track, a plurality of servo areas for recording servo information and a plurality of data areas for recording data information are provided. A heat blocking band is provided between adjacent tracks in the data area for preventing heat from transmitting to the data area.
摘要翻译：光盘具有沿光盘的根本方向布置的多个轨道。在每个轨道上，提供用于记录伺服信息的多个伺服区域和用于记录数据信息的多个数据区域。在数据区域中的相邻轨道之间设置有热阻带，以防止热量传输到数据区域。

24. 发明授权

US5608715A Multi-layered recording disk and recording/reproducing system using the same 失效
标题翻译：多层记录盘和使用其的记录/再现系统
公开(公告)号：US5608715A
公开(公告)日：1997-03-04
申请号：US504793
申请日：1995-07-20
申请人： Fumihiko Yokogawa , Seiichi Ohsawa
发明人： Fumihiko Yokogawa , Seiichi Ohsawa
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/013 , G11B7/085 , G11B7/24 , G11B7/25 , G11B7/258 , G11B7/26 , G11B11/10 , G11B11/105
CPC分类号： G11B7/258 , G11B7/005 , G11B7/007 , G11B7/0079 , G11B7/08511 , G11B7/24 , G11B7/24038 , G11B7/24082 , G11B7/243 , G11B7/25 , G11B7/253 , G11B7/26 , G11B2007/0013 , G11B7/0045 , G11B7/013 , G11B7/2531 , G11B7/2533 , G11B7/2534 , G11B7/2542 , G11B7/2585
摘要： A multi-layered disk which can improve a data recording density and also can record signals and allow reading and reproduction of the recorded signals in good conditions and a recording system as well as a reproducing system using the same and a multi-layered recording disk in which a plurality of data recording surfaces are laminated. In a band wherein, against an MTF level obtained when a read light is on-focus to one of the data recording surfaces, an MTF level obtained when the read light is defocusing to other data recording surfaces is 1/N (N is a real number larger than 1), data signals are recorded in each of the data recording surfaces. A distance t between each data recording surface, numerical aperture NA of an objective lens guiding a read light to any of the data recording surfaces, a wavelength.lambda. of the read light, an equivalent refractive index n between each data recording surface, and a number i of laminated data recording surfaces satisfy the following relation:1.4 n.lambda./(NA).sup.2 .gtoreq.t.gtoreq.7.5 n.sup.3 .lambda./{(n.sup.2 -1)(NA).sup.4 (i-1)}.
摘要翻译：一种可以提高数据记录密度并且还可以记录信号并允许在良好条件下记录的信号的读取和再现以及记录系统以及使用其的再现系统和多层记录盘的多层盘多个数据记录表面被层叠。在其中，当读取光对其中一个数据记录表面进行对焦时获得的MTF电平，当读取光与其它数据记录表面散焦时获得的MTF电平为1 / N（N为实数数量大于1），数据信号被记录在每个数据记录表面中。每个数据记录表面之间的距离t，将读取光引导到任何数据记录表面的物镜的数值孔径NA，读取光的波长λ，每个数据记录表面之间的等效折射率n和数字层叠数据记录面的i满足以下关系：1.4nλ/(NA)2>/=t>/=7.5 n3 lambda / {（n2-1）（NA）4（i-1）}。

25. 发明授权

US5440532A Digital signal reproducing apparatus for reproducing digital signals from a recording medium 失效
标题翻译：用于从记录介质再现数字信号的数字信号再现装置
公开(公告)号：US5440532A
公开(公告)日：1995-08-08
申请号：US230817
申请日：1994-04-21
申请人： Fumihiko Yokogawa , Hideki Hayashi
发明人： Fumihiko Yokogawa , Hideki Hayashi
IPC分类号： G11B7/0037 , G11B20/14 , G11B27/10 , G11B17/22
CPC分类号： G11B20/10222 , G11B20/10037 , G11B20/1403 , G11B27/10 , G11B7/0037
摘要： A digital signal reproducing apparatus is capable of reproducing digital signals with an accurate sampling clock synchronized with the phase of a read signal. A sequence of predetermined sampled values are detected from sampled values produced by A/D converting a read signal. In this sequence of predetermined sampled values, a difference value of two samples produced at timings spaced apart by a predetermined interval from each other is calculated in order to generate a sampling clock having the phase corrected on the basis of the difference value.
摘要翻译：数字信号再现装置能够以与读取信号的相位同步的精确采样时钟再现数字信号。从通过A / D转换读取信号产生的采样值来检测预定采样值的序列。在这个预定采样值序列中，计算在彼此间隔开预定间隔的定时处产生的两个采样的差值，以便产生基于差值校正的相位的采样时钟。

26. 发明授权

US5246758A Optical recording medium 失效
标题翻译：光记录介质
公开(公告)号：US5246758A
公开(公告)日：1993-09-21
申请号：US862373
申请日：1992-04-02
申请人： Fumio Matsui , Fumihiko Yokogawa
发明人： Fumio Matsui , Fumihiko Yokogawa
IPC分类号： G11C13/04 , G11B7/0045 , G11B7/24 , G11B7/257
CPC分类号： G11B7/252 , G11B7/00455 , G11B7/24 , G11B2007/24312 , G11B2007/24314 , G11B2007/24316 , G11B7/2472 , G11B7/248 , G11B7/2533 , G11B7/2534 , G11B7/2575 , G11B7/2585 , G11B7/259 , G11B7/2595 , Y10S428/913 , Y10S430/146 , Y10T428/31678
摘要： An optical recording medium, including a substrate and a recording film disposed thereon, wherein an optical shutter layer is disposed in front of the recording film with respect to the direction of an incident reading light beam or recording light beam which is to be supplied to the optical recording medium; and the optical shutter layer comprises, as a main component, a substance having a shutter property such that the substance is in a state where it develops a color thereof until the substance is irradiated with a reading light beam, but when the substance is irradiated with the reading light beam, the substance irradiated with the reading light beam is heated up over a certain temperature so that the substance is decolored and a central portion of the optical shutter layer irradiated with the reading light beam is caused to have a light transmission.
摘要翻译：一种光记录介质，包括基板和设置在其上的记录膜，其中光闸层相对于入射读取光束的方向或记录光束被设置在记录膜的前面，该光束被提供给光学记录介质; 并且光学快门层包括作为主要组分的具有快门特性的物质，使得物质处于其显色的状态直到物质被读取光束照射，但是当物质被照射时读取光束，用读取光束照射的物质在一定温度下被加热，使物质脱色，并且使用光读取光束照射的光学快门层的中心部分具有透光性。

27. 发明授权

US5089900A Spindle control device in optical disk recording/reproducing apparatus 失效
标题翻译：光盘记录/重放装置中的主轴控制装置
公开(公告)号：US5089900A
公开(公告)日：1992-02-18
申请号：US511139
申请日：1990-04-19
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B19/28
CPC分类号： G11B19/28
摘要： In an optical disk recording/reproducing apparatus, a spindle control device in which a vertical synchronizing mark is detected so as to generate a synchronizing mark detection signal. A time base reference signal is generated at the same time, that signal being delayed by a variable delay circuit so as to perform phase control on a spindle motor for rotating the optical disk in accordance with a phase difference of the synchronizing mark detection signal from the delayed time base reference signal. Accordingly, it is easy to adjust, electrically, the relative position on the time base between the vertical synchronizing mark detection timing and a composite video signal to be recorded, by adjusting suitably the amount of delay of the variable delay circuit, without having to adjust the vertical synchronizing mark detector positionally.
摘要翻译：在光盘记录/再现装置中，检测垂直同步标记以产生同步标记检测信号的主轴控制装置。同时产生时基参考信号，该信号被可变延迟电路延迟，以便根据来自同步标记检测信号的相位差来对主轴电动机进行相位控制以旋转光盘延迟时基参考信号。因此，通过适当地调整可变延迟电路的延迟量，可以容易地电垂直同步标记检测定时和要记录的复合视频信号之间的时基上的相对位置，而不必调整垂直同步标记检测器位置。

28. 发明授权

US4908811A Method and apparatus for data recording and reproducing with error reduction 失效
标题翻译：用于数据记录和再现的方法和装置，具有错误减少
公开(公告)号：US4908811A
公开(公告)日：1990-03-13
申请号：US248063
申请日：1988-09-23
申请人： Fumihiko Yokogawa , Hiroyuki Hirano
发明人： Fumihiko Yokogawa , Hiroyuki Hirano
IPC分类号： G11B7/004 , G11B20/18
CPC分类号： G11B20/18 , G11B20/1879 , G11B7/004
摘要： An optical disk data recording and reproducing apparatus includes variable delay circuits in the recording and reproducing sections of the apparatus. The delay of the reproducing section delay circuit is adjusted when the error ratio determined for a reproduced data signal corresponding to a recorded data signal is greater than a predetermined value. When the error ratio is less than the predetermined value after adjustment of the delay circuit, the delay of the delay circuit in the recording section is adjusted to match the adjusted delay of the reproducing section delay circuit and the delay of the latter circuit is retured to its original value.
摘要翻译：光盘数据记录和再现装置包括设备的记录和再现部分中的可变延迟电路。当对与记录的数据信号相对应的再现数据信号确定的误差比大于预定值时，再现段延迟电路的延迟被调整。当在延迟电路调整之后误差率小于预定值时，调整记录部分中的延迟电路的延迟以使再现部分延迟电路的调整延迟与后一电路的延迟相匹配，其原始价值。

29. 发明授权

US4513242A Electronic impedance device for providing a variable impedance 失效
标题翻译：用于提供可变阻抗的电子阻抗装置
公开(公告)号：US4513242A
公开(公告)日：1985-04-23
申请号：US429316
申请日：1982-09-30
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： H04B1/62 , G11B20/04 , H03G7/00 , H03G9/18 , H03H11/46 , H04B1/64 , H03H11/00
CPC分类号： H03H11/46 , H03G9/18
摘要： An electronic impedance device provides a variable impedance in, for example, a Dolby noise reduction system. The device includes an input terminal connected to a source of a signal voltage. A differential voltage-to-current converter circuit, having a relatively high input impedance, converts the input signal voltage into two differential output currents that are variable with the input signal voltage. A pair of p-n junction elements, such as diodes, are connected to the converter circuit via a current transfer circuit. The current transfer circuit transfers the differential output currents to the p-n junction elements. A differential current amplifier circuit is responsive to the voltage built up across the p-n junction elements. The differential current amplifier has an output terminal to produce an output current. A feedback line connects the output terminal of the amplifier circuit to the input terminal for permitting the output current of the amplifier circuit to be fed back to the input terminal of the device.
摘要翻译：电子阻抗装置在例如杜比噪声降低系统中提供可变阻抗。该装置包括连接到信号电压源的输入端。具有较高输入阻抗的差分电压 - 电流转换器电路将输入信号电压转换为可随输入信号电压变化的两个差分输出电流。一对p-n结元件（例如二极管）经由电流传输电路连接到转换器电路。电流传输电路将差分输出电流传送到p-n结元件。差分电流放大器电路响应跨越p-n结元件的电压。差分电流放大器具有输出端子以产生输出电流。反馈线将放大器电路的输出端连接到输入端，以使放大器电路的输出电流反馈到器件的输入端。

30. 发明授权

US5917857A Digital modulation apparatus, a digital modulation method, and a recording medium therefor 失效
标题翻译：数字调制装置，数字调制方法及其记录介质
公开(公告)号：US5917857A
公开(公告)日：1999-06-29
申请号：US764024
申请日：1996-12-11
申请人： Shin-ichi Tanaka , Toshiyuki Shimada , Tadashi Kojima , Koichi Hirayama , Yoshiaki Moriyama , Fumihiko Yokogawa , Takao Arai , Toshifumi Takeuchi
发明人： Shin-ichi Tanaka , Toshiyuki Shimada , Tadashi Kojima , Koichi Hirayama , Yoshiaki Moriyama , Fumihiko Yokogawa , Takao Arai , Toshifumi Takeuchi
IPC分类号： G11B20/14 , H03M5/14 , H03M7/14 , H04L25/49 , H04B14/04 , H03M7/00
CPC分类号： H03M5/145 , G11B20/1426
摘要： A digital modulation apparatus applies a method for converting data words to runlength-limited code words using plural conversion tables. The data words are converted to code words that significantly suppress the low frequency component of the final nonreturn-to-zero inverted signal.This digital modulation apparatus includes ROM tables for storing plural conversion tables containing the runlength-limited code words corresponding to the data words; end-runlength memories and evaluators for determining whether the runlength-limit constraints are satisfied in the interconnection between two consecutive code words when the data words to be converted are supplied; and a DSV controller for storing each of the code words that can be selected from two conversion tables to buffer memories when the runlength-limit constraints are satisfied, and selecting the code words wit the greatest effect suppressing the low frequency component in the obtained signal when the code words are NRZI converted.
摘要翻译：数字调制装置应用一种使用多个转换表将数据字转换成游程长度限制码字的方法。数据字被转换成显着抑制最终的非归零到反相信号的低频分量的码字。该数字调制装置包括用于存储包含对应于数据字的游程限制码字的多个转换表的ROM表; 终端游程长度存储器和评估器，用于在提供要转换的数据字时确定在两个连续码字之间的互连中是否满足游程限制约束; 以及DSV控制器，用于当满足游程长度限制约束时，将可从两个转换表中选择的每个代码字存储到缓冲存储器，并且选择在获得的信号中抑制低频分量的最大效应的代码字，代码字被NRZI转换。

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