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1. 发明授权

EP0477892B1 Method of and apparatus for correcting edge interval of pit in optical recording/read-out apparatus 失效
标题翻译：用于光学记录的孔边缘的距离的校正方法和设备/再现设备
公开(公告)号：EP0477892B1
公开(公告)日：1997-01-08
申请号：EP91116322.8
申请日：1991-09-25
申请人： HITACHI, LTD.
发明人： Ide, Hiroshi , Maeda, Takeshi , Saito, Atsushi
IPC分类号： G11B7/00 , G11B7/125 , G11B7/013
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/24085 , G11B11/10506 , G11B11/1053 , G11B11/10595 , G11B20/10009 , G11B20/10212 , G11B20/1258 , G11B20/1816 , G11B27/36

2. 发明公开

EP0587019A3 Optical disk system and information processing system using the same 失效
标题翻译：光盘系统和信息处理系统
公开(公告)号：EP0587019A3
公开(公告)日：1996-09-04
申请号：EP93113890.3
申请日：1993-08-31
申请人： HITACHI, LTD.
发明人： Minemura, Hiroyuki , Sato, Yoshio , Fushimi, Tetsuya , Tsuboi, Nobuyoshi , Yasukawa, Saburo , Sugita, Tatsuya , Saito, Atsushi , Matsumoto, Kiyoshi , Tsunoda, Yoshito
IPC分类号： G11B7/013 , G11B7/00 , G11B20/12 , G11B19/28
CPC分类号： G11B20/1258 , G11B7/0938 , G11B27/3027 , G11B27/329 , G11B2020/1282 , G11B2220/20
摘要： An optical disk system and an information processing system using the same. By constituting zones (51, 52) for MCLV (Modulated Constant Linear Velocity) drive in conformance with designated partition capacity in an optical disk medium (10) while overwriting therein sector addresses (31), a high-speed access comparable to a CAV (Constant Angular Velocity) system as well as a large capacity comparable to CLV (Constant Linear Velocity) system can be realized.
摘要翻译：光盘系统和使用该光盘系统的信息处理系统。通过根据光盘介质（10）中的指定分区容量构建用于MCLV（调制恒定线速度）驱动的区域（51,52），同时在其中覆盖扇区地址（31），与CAV（恒定角速度）系统以及与CLV（恒定线速度）系统相当的大容量。

3. 发明公开

EP0166460A2 Optical head for magneto-optical memory 失效
标题翻译：一种光学头，用于磁 - 光存储器。
公开(公告)号：EP0166460A2
公开(公告)日：1986-01-02
申请号：EP85108077.0
申请日：1985-06-28
申请人： HITACHI, LTD.
发明人： Ojima, Masahiro , Saito, Atsushi , Kato, Tsuyoshi
IPC分类号： G11B11/10
CPC分类号： G11B11/10532
摘要： An optical head for a magneto-optical memory in which the major axis (the phase advance axis or phase lag axis) of optical anisotropy of a lens (5) focusing a linearly polarized laser beam onto a magneto-optical recording medium (6) is arranged to coincide with the direction of linear polarization of the laser beam incident upon the lens, thereby improving the extinction ratio.

4. 发明公开

EP0910069A3 Optical disk 失效
标题翻译： Optische普拉特
公开(公告)号：EP0910069A3
公开(公告)日：2008-04-16
申请号：EP98124240.7
申请日：1991-05-24
申请人： Hitachi, Ltd.
发明人： Maeda, Takeshi , Arai, Shinichi , Isaka, Kazuo , Saito, Atsushi , Mizokami, Takuya , Sugiyama, Hisataka , Kawamura, Satoshi
IPC分类号： G11B7/007 , G11B7/013 , G11B20/12
CPC分类号： G11B7/005 , G11B7/004 , G11B7/0045 , G11B7/00736 , G11B7/0079 , G11B7/126 , G11B20/10 , G11B20/1258 , G11B20/1403 , G11B20/1833 , G11B20/1879 , G11B23/40 , G11B2020/1277
摘要： The invention relates to an optical disk divided into a plurality of zones, each zone including a plurality of tracks, respective tracks in each of the zones including a constant number of sectors. For attaining a high recording density and a high transfer rate it is suggested that recorded code corresponds to length of recording mark, the optical disk includes a user use region, a manufacture region for identifying a type and/or a characteristic of the optical disk, and a guard region for absorbing a variation in mechanical precision of a driving device, the regions being defined by radial positions, and information on track number and sector number is written on the user use region, the manufacture region, and the guard region when the optical disk is manufactured.
摘要翻译：一种用于记录信息记录/再现装置的信息的方法，该信息记录/再现装置设置有盘状记录介质，用于以恒定的角速度旋转记录介质的装置，用于以几乎固定的位长度记录编码信息的装置在记录介质的径向方向上的位置，用于通过调制要记录的编码信息来产生调制信号的装置，以及用于在记录介质上局部地形成具有与其他区域的特性物理上不同的记录区域的记录装置，并且其中通过利用调制信号控制记录装置来与记录区域的边缘相对应地记录编码信息，所述信息记录/再现方法的特征在于记录和再现特性的一部分随着记录的位置的不同而不同通过使用记录/再现系统i在记录介质中的信息 n，要记录的编码信息的比特率与位置不同。

5. 发明公开

EP0793221A1 Optical recording method 失效
标题翻译： Optisches Aufzeichnungsverfahren undAufzeichnungsgerät
公开(公告)号：EP0793221A1
公开(公告)日：1997-09-03
申请号：EP97105700.5
申请日：1991-05-24
申请人： HITACHI, LTD.
发明人： Maeda, Takeshi , Arai, Shinichi , Isaka, Kazuo , Saito, Atsushi , Mizokami, Takuya , Sugiyama, Hisataka , Kawamura, Satoshi
IPC分类号： G11B7/125
CPC分类号： G11B7/005 , G11B7/004 , G11B7/0045 , G11B7/00736 , G11B7/0079 , G11B7/126 , G11B20/10 , G11B20/1258 , G11B20/1403 , G11B20/1833 , G11B20/1879 , G11B23/40 , G11B2020/1277
摘要： There is disclosed an information recording/reproducing method in an information recording/reproducing apparatus comprising a recording medium having a disk-like shape, means for rotating the recording medium at a constant angular velocity, means for recording code information so that the bit length of the code information becomes approximately constant with respect to a radial position on the recording medium, means for modulating the code information to be recorded to form a modulated signal, and recording means for forming in the recording medium a localized recording region having a different physical property the recording means being controlled by the modulated signal so that the code information is recorded to correspond to the edge of the recording region, in which there is used a recording/reproducing system in which the bit rate of the code information to be recorded changes depending on a location on the recording medium, and a part of each of a recording characteristic and a reproducing characteristic is changed in accordance with a location on the recording medium.
摘要翻译：在信息记录/再现装置中公开了一种信息记录/再现方法，包括具有盘状形状的记录介质，用于以恒定角速度旋转记录介质的装置，用于记录代码信息的装置，代码信息相对于记录介质上的径向位置变得近似恒定，用于调制要记录的代码信息以形成调制信号的装置，以及用于在记录介质中形成具有不同物理属性的局部记录区域的记录装置记录装置由调制信号控制，使得代码信息被记录为对应于记录区域的边缘，其中使用记录/再现系统，其中待记录的代码信息的比特率根据在记录介质上的位置上，以及记录特性的每一个的一部分再现特性根据记录介质上的位置而改变。

6. 发明公开

EP0660605A2 Video storage and delivery apparatus and system 失效
标题翻译：视频存储和传输设备和系统
公开(公告)号：EP0660605A2
公开(公告)日：1995-06-28
申请号：EP94120740.9
申请日：1994-12-27
申请人： HITACHI, LTD.
发明人： Asai, Mitsuo , Takiyasu, Yoshihiro , Shibata, Koichi , Sato, Mikiko , Saito, Atsushi , Hayashi, Takehisa , Igawa, Masaru, Hitachi Daiyon Kyoshinryo
IPC分类号： H04N5/765 , H04N5/926 , H04N7/10 , H04N7/173
CPC分类号： H04N7/10 , H04N5/765 , H04N5/781 , H04N5/783 , H04N5/85 , H04N5/926
摘要： In a video storage and delivery apparatus (102-105) and a video storage and delivery system (Fig. 1), video data items are simultaneously supplied to a plurality of users (170, 172) while guaranteeing the time axis and the picture quality of the video data. The apparatus includes a frame address table (1408) which indicates a storage location in the apparatus of each frame of video data to start a special reproduction or a reproduction at a desired frame and a control unit (161) controlling a switch bus (140) connecting a plurality of video storage and delivery apparatuses to a plurality of channels so as to conduct data transfers via the switch bus between the apparatuses and between video reproduction devices of the users. From an optical disk data storage storing video data, a plurality of video data items are read in a timesharing fashion to be temporarily stored in a magnetic disk device or a semiconductor memory, thereby delivering the video data items therefrom to the users.
摘要翻译：在视频存储和传送装置（102-105）和视频存储和传送系统（图1）中，视频数据项同时提供给多个用户（170,172），同时保证时间轴和图像质量的视频数据。该装置包括：帧地址表（1408），用于指示每帧视频数据的装置中的存储位置以开始特定再现或在期望帧处的再现;以及控制单元（161），控制开关总线（140）将多个视频存储和传送装置连接到多个信道，以便经由装置之间和用户的视频再现装置之间的交换总线进行数据传送。从存储视频数据的光盘数据存储器中，以分时方式读取多个视频数据项以临时存储在磁盘装置或半导体存储器中，由此将视频数据项从其传送给用户。

7. 发明授权

EP0322817B1 Recording method for magnetoptical disk and apparatus therefor 失效
标题翻译：用于记录磁光盘的方法和装置。
公开(公告)号：EP0322817B1
公开(公告)日：1994-10-26
申请号：EP88121631.1
申请日：1988-12-23
申请人： HITACHI, LTD. , Hitachi Maxell Ltd.
发明人： Nagai, Nobuyuki , Maeda, Takeshi , Saito, Atsushi , Nakao, Takeshi , Watanabe, Hitoshi Hitachi Maxell Shihoryo
IPC分类号： G11B20/10 , G11B27/10 , G11B11/10 , G11B20/18 , G11B27/30
CPC分类号： G11B20/10212 , G11B11/10508 , G11B11/1053 , G11B11/10595 , G11B19/02 , G11B27/30 , G11B27/36

8. 发明授权

EP0164745B1 Method of and apparatus for recording/erasing information by utilizing light induced thermo-magnetic effect 失效
标题翻译：利用光诱导热磁效应记录/消除信息的方法和装置
公开(公告)号：EP0164745B1
公开(公告)日：1992-05-20
申请号：EP85107258.7
申请日：1985-06-12
申请人： HITACHI, LTD.
发明人： Saito, Atsushi , Ojima, Masahiro , Maeda, Takeshi , Kato, Tsuyoshi
IPC分类号： G11B13/04 , G11B11/10
CPC分类号： G11B11/10595 , G11B11/10506 , G11B11/10517 , G11B11/1056 , G11B13/045 , G11B19/02

9. 发明公开

EP0305979A3 Optical recording and reproducing system using optical recording medium 失效
标题翻译：使用光学记录介质的光学记录和再现系统
公开(公告)号：EP0305979A3
公开(公告)日：1991-09-25
申请号：EP88114153.5
申请日：1988-08-30
申请人： HITACHI, LTD.
发明人： Sugiyama, Hisataka , Maeda, Takeshi , Saito, Atsushi
IPC分类号： G11B7/013 , G11B7/09
CPC分类号： G11B7/0901 , G11B7/00745 , G11B7/0938 , G11B7/261 , G11B11/10502 , G11B11/10578 , G11B11/10597
摘要： An optical recording and reproducing system which makes recording and reproduction of information by radiating an optical spot to a disk-like optical recording medium (2), and makes recording and reproduction of the information by use of part of the optical intensity distribution due to the interference of diffracted light distribution from the recording medium (2) resulting from the localized characteristic change of the recording medium (2) such as the change of the real amplitude reflection coefficient due to the radiation of the optical spot. Further, a tracking error signal in said system is detected sample-wise from two kinds of pre-pit lines (7, 8) disposed in the tracking direction on the surface of the disk-like recording medium (2) so as to make tracking control for the recording and reproduction of the information.

10. 发明公开

EP0322817A2 Recording method for magnetoptical disk and apparatus therefor 失效
标题翻译： Verfahren undGerätzur Aufnahme von magneto-optischen Platten。
公开(公告)号：EP0322817A2
公开(公告)日：1989-07-05
申请号：EP88121631.1
申请日：1988-12-23
申请人： HITACHI, LTD. , Hitachi Maxell Ltd.
发明人： Nagai, Nobuyuki , Maeda, Takeshi , Saito, Atsushi , Nakao, Takeshi , Watanabe, Hitoshi Hitachi Maxell Shihoryo
IPC分类号： G11B20/10 , G11B27/10 , G11B11/10 , G11B20/18 , G11B27/30
CPC分类号： G11B20/10212 , G11B11/10508 , G11B11/1053 , G11B11/10595 , G11B19/02 , G11B27/30 , G11B27/36
摘要： A method of recording a signal in a magnetooptical disk (1) having pre-pits (110, 111, 112) formed on a recording track (120) which pits are optically detectable for generation of data read and write clocks. The method includes the steps of: prior to writing data in the magnetooptical disk, writing a test pattern (301) on a top portion of a data recording area of the magnetooptical disk at predetermined timings (27); reading the data recording area to generate a time shift (305) between the read-out test pattern (304) and the original test pattern (301); adjusting the predetermined timings (27) in accordance with the time shift (305) to generate adjusted data write timings (29); and writing data in the data writing area in accordance with the adjusted data write timings (29). A recording apparatus for a magnetooptical disk (1) using the recording method, includes: a timing shift detection unit (42) for receiving a predetermined test pattern signal (301) and a read-out signal (304) of the test pattern written in the magnetooptical disk at predetermined clocks (27), and detecting a time shift (305) therebetween; a clock adjustment unit (28) for adjusting the predetermined clocks (27) in accordance with the detected time shift (305) detected by the timing shift detection unit to generate adjusted clocks (29); a clock switching unit (30) for receiving the predetermined clocks (27) and the adjusted clocks (29), and selectively outputting ones of the predetermined clocks and the adjusted clocks upon reception of a predetermined switching signal (30A); a data modulation unit (41) for receiving one of the predetermined test pattern (301) and write data (32), modulating the received one at the timings of ones of the received clocks inputted from the clock switching unit (30), and outputting the received modulated one to a write device (10); and a control unit (43) adapted to operate such that in writing the test pattern (301) in the magnetooptical disk (1), the test pattern signal (301) is outputted to the data modulation unit (41), and the switching signal (30A) is outputted to the clock switching unit (30) to supply the predetermined clocks (27) to the data modulation unit (41), in reading the test pattern, the test pattern (304) is outputted to the timing shift detection unit (42), and in writing data, the switching signal (30A) is outputted to the clock switching unit (30) to output the adjusted clocks (29) to the data modulation unit (41) to which the write data (32) are also outputted.
摘要翻译：一种在具有形成在记录轨道（120）上的预凹坑（110,111,112）的磁光盘（1）中记录信号的方法，该凹坑可光学地可检测以产生数据读和写时钟。该方法包括以下步骤：在将数据写入磁光盘之前，以预定的时间（27）将测试图案（301）写入磁光盘的数据记录区的顶部; 读取数据记录区域以在读出的测试图案（304）和原始测试图案（301）之间产生时移（305）; 根据时移（305）调整预定定时（27）以产生经调整的数据写定时（29）; 以及根据调整后的数据写入定时（29）在数据写入区域中写入数据。一种用于使用记录方法的磁光盘（1）的记录装置，包括：定时偏移检测单元（42），用于接收写入的测试图案的预定测试图案信号（301）和读出信号（304）在预定时钟（27）处的磁光盘，并且检测它们之间的时间偏移（305）; 时钟调整单元（28），用于根据由定时偏移检测单元检测到的检测到的时移（305）来调整预定时钟（27），以产生调整时钟（29）; 用于接收预定时钟（27）和调整时钟（29）的时钟切换单元（30），并且在接收到预定切换信号（30A）时选择性地输出预定时钟和调整时钟中的一个; 数据调制单元（41），用于接收预定测试图形（301）中的一个和写入数据（32），在从时钟切换单元（30）输入的接收时钟中的一个定时的时刻调制接收的数据，并输出所接收的调制信号到写装置（10）; 以及控制单元（43），其适于操作，使得在将所述测试图案（301）写入所述磁光盘（1）中时，所述测试图案信号（301）被输出到所述数据调制单元（41），并且所述切换信号（30A）被输出到时钟切换单元（30），以将预定时钟（27）提供给数据调制单元（41），在读取测试图形时，将测试图案（304）输出到定时偏移检测单元（42），并且在写入数据时，切换信号（30A）被输出到时钟切换单元（30），以将调整后的时钟（29）输出到写入数据（32）所在的数据调制单元（41）也输出。

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