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1. 发明授权

EP0102607B1 Disc playback apparatus 失效
标题翻译： DISC回放设备
公开(公告)号：EP0102607B1
公开(公告)日：1987-03-18
申请号：EP83108495.9
申请日：1983-08-29
申请人： HITACHI, LTD.
发明人： Nakagaki, Harushige , Iso, Yoshimi , Inoue, Shigeki
IPC分类号： G11B7/00
CPC分类号： G11B20/18 , G11B7/0948 , G11B2020/1823 , G11B2220/2537

2. 发明公开

EP0102607A1 Disc playback apparatus 失效
标题翻译：装置播放光盘。
公开(公告)号：EP0102607A1
公开(公告)日：1984-03-14
申请号：EP83108495.9
申请日：1983-08-29
申请人： HITACHI, LTD.
发明人： Nakagaki, Harushige , Iso, Yoshimi , Inoue, Shigeki
IPC分类号： G11B7/00
CPC分类号： G11B20/18 , G11B7/0948 , G11B2020/1823 , G11B2220/2537
摘要： In a disc playback apparatus using an optical pickup (14) or the like, any flaws on a track of the disc (13) are detected using: a first level detector (16) for detecting a maximum value level of a recording information signal of an output of the pickup (14); a second level detector (17) for detecting a change of the maximum value level of the recording information signal; and a comparator (18) for comparing outputs (e 01 , e 02 ) of the above first and second level detectors (16,17). When any flaws were detected, a driving signal of a driving device for the pickup is held to a fixed potential.

3. 发明公开

EP0087718A1 Tracking servo control unit for an information reproducing apparatus 有权
标题翻译： Spurfolge-Servosteuereinheitfürein信息 - Wiedergabegerät。
公开(公告)号：EP0087718A1
公开(公告)日：1983-09-07
申请号：EP83101658.9
申请日：1983-02-21
申请人： Hitachi, Ltd.
发明人： Iso, Yoshimi , Inoue, Shigeki , Noda, Tsutomu , Ohashi, Shinichi
IPC分类号： G11B7/08 , G11B21/10
CPC分类号： G11B21/106 , G11B7/0903
摘要： In an information reproducing apparatus having a tracking servo control loop for causing an information reading unit including means for detecting a tracking error signal for tracking an information bearing track on a disc, to track the information bearing track in accordance with the tracking error signal to reproduce information in accordance with an information signal read by the information reading unit, a circuit (1, 2, 3, 4, 5, 10, 17) for extracting a discrimination signal for discriminating a negative feedback region of the tracking error signal is provided so that a tracking servo control loop is closed (11) in the negative feedback region.
摘要翻译：在具有跟踪伺服控制环路的信息重放装置中，用于使信息读取单元包括用于检测用于跟踪盘上的信息承载轨迹的跟踪误差信号的装置，以根据跟踪误差信号跟踪信息承载轨迹以再现根据由信息读取单元读取的信息信号的信息，提供用于提取用于鉴别跟踪误差信号的负反馈区域的判别信号的电路（1,2,3,4,5,10,17），跟踪伺服控制环在负反馈区域中闭合（11）。

4. 发明公开

EP0077075A1 Digital player for reproducing a digital signal sequence 失效
标题翻译：数码播放器再现的数字信号序列。
公开(公告)号：EP0077075A1
公开(公告)日：1983-04-20
申请号：EP82109467.9
申请日：1982-10-13
申请人： Hitachi, Ltd.
发明人： Tanaka, Hiromichi , Kimura, Hiroyuki , Noda, Tsutomu , Arai, Takao , Kobayashi, Masaharu , Inoue, Shigeki
IPC分类号： G11B5/09 , G11B19/28 , G01R29/027
CPC分类号： G11B19/28 , G01R29/0273 , G11B20/10 , Y10S388/912 , Y10S388/916
摘要： In a pulse width detector circuit, a high-level pulse width and a low-level pulse width of a digital signal derived by slicing an analog signal reproduced from a disc (1) at a predetermined level are independently measured (29, 30) and maximum or minimum values thereof in a predetermined time interval are stored, and an average value, sum or difference of the maximum or minimum high-level pulse width and the maximum or minimum low-level pulse width is calculated (37) to detect a correct pulse width of original data recorded on the disc.

5. 发明授权

EP0818776B1 Optical disc apparatus accessing method and system therefor 失效
标题翻译：方法和系统的光盘播放机的数据访问
公开(公告)号：EP0818776B1
公开(公告)日：2008-02-13
申请号：EP97111436.8
申请日：1997-07-07
申请人： Hitachi, Ltd.
发明人： Ono, Kazuhiko , Ikeda, Eiji , Minoda, Hiroshi No. 342 Hitachi-hachimanyama-apato , Fukushima, Akio, No. 410 Moa-suteji-totsuka , Shioyama, Hiroaki, No. 503 Daini-kiraku-haitsu , Inoue, Shigeki
IPC分类号： G11B7/085 , G11B27/00
CPC分类号： G11B21/083 , G11B7/0037 , G11B7/08511 , G11B7/0945 , G11B19/02 , G11B2007/0006 , G11B2007/0013

6. 发明公开

EP0818776A3 Optical disc apparatus accessing method and system therefor 失效
标题翻译：光盘装置存取方法及其系统
公开(公告)号：EP0818776A3
公开(公告)日：1998-09-16
申请号：EP97111436.8
申请日：1997-07-07
申请人： HITACHI, LTD.
发明人： Ono, Kazuhiko , Ikeda, Eiji , Minoda, Hiroshi No. 342 Hitachi-hachimanyama-apato , Fukushima, Akio, No. 410 Moa-suteji-totsuka , Shioyama, Hiroaki, No. 503 Daini-kiraku-haitsu , Inoue, Shigeki
IPC分类号： G11B7/085
CPC分类号： G11B21/083 , G11B7/0037 , G11B7/08511 , G11B7/0945 , G11B19/02 , G11B2007/0006 , G11B2007/0013
摘要： There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving means to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processing means similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.
摘要翻译：提供了多个信息记录表面，用于在光盘的一侧再现要再现的信息记录表面，当执行对多个记录层上的光学拾取器的访问控制时，首先，光学拾取器的光束焦点利用移动装置移动到其上记录有目标信息的记录层，从而在再现期间执行信息记录层的切换处理，之后，使用类似于相同记录之间的访问的控制处理装置来执行光学拾取器的访问控制对于暂停操作，在从内周到外周记录信息的层中，向内周重复一次轨道跳跃，而在从外周记录信息的层中到内圆周，向外圆周重复一次轨道跳跃。

7. 发明公开

EP0818776A2 Optical disc apparatus accessing method and system therefor 失效
标题翻译：方法和系统的光盘播放机的数据访问
公开(公告)号：EP0818776A2
公开(公告)日：1998-01-14
申请号：EP97111436.8
申请日：1997-07-07
申请人： HITACHI, LTD.
发明人： Ono, Kazuhiko , Ikeda, Eiji , Minoda, Hiroshi No. 342 Hitachi-hachimanyama-apato , Fukushima, Akio, No. 410 Moa-suteji-totsuka , Shioyama, Hiroaki, No. 503 Daini-kiraku-haitsu , Inoue, Shigeki
IPC分类号： G11B7/085
CPC分类号： G11B21/083 , G11B7/0037 , G11B7/08511 , G11B7/0945 , G11B19/02 , G11B2007/0006 , G11B2007/0013
摘要： There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving means to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processing means similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.

8. 发明公开

EP0810598A2 Optical disk apparatus 失效
标题翻译：光盘装置
公开(公告)号：EP0810598A2
公开(公告)日：1997-12-03
申请号：EP97108294.6
申请日：1997-05-22
申请人： HITACHI, LTD.
发明人： Inoue, Shigeki , Minoda, Hiroshi , Tanaka, Hiroyuki , Fukushima, Akio , Ono, Kazuhiko
IPC分类号： G11B19/12 , G11B7/09
CPC分类号： G11B19/12 , G11B7/0908
摘要： An optical disk apparatus for reproducing or recording and reproducing two or more sorts of optical (1, 4) disks whose recording plane heights are different is arranged to reproduce or record data from or on the optical disk transparently to the user and without the users intricate operations. For this purpose, the optical disk apparatus provides a disk discriminating circuit (14) for discriminating the disks whose recording plane heights are different. The disk discriminating circuit (14) operates to discriminate the disk before reproducing or recording the disk mounted to the optical disk apparatus and switch the optical system (6, 61, 62) and the circuit system to the suitable ones to the discriminated disk and then reproduce or record the data from or on the disk.
摘要翻译：用于再现或记录和再现两种或更多种记录平面高度不同的光盘（1,4）盘的光盘装置被设置为透明地向用户再现或记录来自光盘的数据，并且没有用户错综复杂地操作。为此目的，光盘装置提供一个用于鉴别记录平面高度不同的盘的盘鉴别电路（14）。在重放或记录安装到光盘装置上的盘之前，盘识别电路（14）进行识别盘的操作，并将光学系统（6,61,62）和电路系统切换到合适的盘，然后切换到识别盘重现或记录磁盘上或磁盘上的数据。

9. 发明授权

EP0095766B1 Servo circuit for a signal reproducing apparatus 失效
标题翻译：伺服电路用于信号再现装置
公开(公告)号：EP0095766B1
公开(公告)日：1986-10-22
申请号：EP83105327.7
申请日：1983-05-30
申请人： HITACHI, LTD.
发明人： Inoue, Shigeki , Arai, Takao , Fukui, Yukio , Takeuchi, Takashi , Nakagaki, Harushige , Nagamura, Masafumi , Baba, Tatsuo
IPC分类号： G11B7/095
CPC分类号： G11B21/106 , G11B7/0941 , G11B7/0945 , G11B7/0948 , G11B19/04 , G11B20/10

10. 发明授权

EP0077075B1 Digital player for reproducing a digital signal sequence 失效
标题翻译：用于复制数字信号序列的数字播放器
公开(公告)号：EP0077075B1
公开(公告)日：1986-07-16
申请号：EP82109467.9
申请日：1982-10-13
申请人： Hitachi, Ltd.
发明人： Tanaka, Hiromichi , Kimura, Hiroyuki , Noda, Tsutomu , Arai, Takao , Kobayashi, Masaharu , Inoue, Shigeki
IPC分类号： G11B5/09 , G11B19/28 , G01R29/027
CPC分类号： G11B19/28 , G01R29/0273 , G11B20/10 , Y10S388/912 , Y10S388/916

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