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11. 发明公开

EP0440810A1 OPTICAL RECORDING MEDIUM AND INFORMATION RECORDING APPARATUS 失效
标题翻译：光储存系统。
公开(公告)号：EP0440810A1
公开(公告)日：1991-08-14
申请号：EP90912458.8
申请日：1990-08-22
申请人： SONY CORPORATION
发明人： YAMAGAMI, Tamotsu , SAKO, Yoichiro
IPC分类号： G11B7/00 , G11B7/007 , G11B7/26 , G11B11/10
CPC分类号： G11B7/0904 , G11B7/24082 , G11B7/26 , G11B11/10576 , G11B11/10578 , G11B27/19 , G11B27/24 , G11B2220/213 , G11B2220/2525 , G11B2220/2545
摘要： A recording medium capable of reproducing information optically, which has a structure vherein the track shifted in the widthwise direction is preformatted by a signal made by removing high-frequency components from a base band signal of recorded information. A recording apparatus for forming tracks on an optical recording medium capable of reproducing information optically, which includes a deflector for deflecting a recording beam with which the tracks are formed in the widthwise direction of the track, a deflection control signal generator for generating a deflection control signal by which this deflector is controlled and a low-pass filter for removing the high-frequency components of the base band signal of the recorded information, the components being used for producing the deflection control signal in the deflection control signal generator. Thus, adverse influences on the main information recorded onto the tracks are reduced.

12. 发明授权

EP0210275B1 RECORDING/REPRODUCING APPARATUS USING MAGNETO-OPTICAL DISK 有权
标题翻译：使用磁光盘记录/再现设备
公开(公告)号：EP0210275B1
公开(公告)日：1991-07-10
申请号：EP86900237.8
申请日：1985-12-05
申请人： SONY CORPORATION
发明人： HENMI, Fumiaki , YAMAGAMI, Tamotsu
IPC分类号： G11B7/09
CPC分类号： G11B11/10595 , G11B7/0941 , G11B11/10506 , G11B11/10576
摘要： A recording/reproducing apparatus comprising a digital modulator circuit (18) which receives digital signals that are to be recorded, means (17) for controlling a laser beam that is guided from a laser source (10) to an optical disk (1) depending upon the output of said digital modulator circuit (18), first optical means (9, 8, 7, 6, 4) which guide the laser beam from said laser source (10) to said optical disc (1), second optical means (4, 6, 11, 14, 15) which guide the laser beam returning from said optical disk to an optical detector (16), an actuator (5) which is served with a servo error signal obtained from said optical detector (16) and which adjusts the laser beam for said optical disk, a low-pass filter (19) which is served with the output of said digital modulator circuit, and removing means (20, 21) that remove low-pass component output signal that has passed through said low-pass filter (19) from said servo error signal. In recording the data, low-pass components are extracted from the digitally modulated output to adjust the gain and, thereby to cancel the low-pass components contained in the servo-error signal. Namely, digitally modulated low-pass components are removed from both the tracking and focussing servo error signals, making it possible to stably apply a servo signal. In reproducing the data, the power of laser beam is smaller than in recording the data, and the low-pass components in the recorded signals are not so intense as to adversely affect the servo signal. Therefore, the modulation system has a mild gain making it possible to highly densely record the data.

13. 发明授权

EP0726572B1 OPTICAL DISK AND OPTICAL DISK DRIVE DEVICE 失效
标题翻译：光学和光盘驱动单元
公开(公告)号：EP0726572B1
公开(公告)日：2002-10-16
申请号：EP95929222.8
申请日：1995-08-24
申请人： SONY CORPORATION
发明人： TOBITA, Minoru , FUJITA, Goro , OTSUKA, Satoshi , YAMAGAMI, Tamotsu
IPC分类号： G11B20/12 , G11B7/007 , G11B7/00 , G11B27/30 , G11B20/14
CPC分类号： G11B27/329 , G11B7/00745 , G11B11/10565 , G11B11/10578 , G11B11/10595 , G11B11/10597 , G11B13/04 , G11B19/02 , G11B19/12 , G11B19/28 , G11B20/1258 , G11B21/083 , G11B27/19 , G11B27/3027 , G11B2020/1232 , G11B2020/1265 , G11B2020/1267 , G11B2020/1285 , G11B2020/1287 , G11B2220/20 , G11B2220/218 , G11B2220/2525 , G11B2220/2537

14. 发明公开

EP0441967A1 OPTICAL RECORDING MEDIUM, DATA RECORDING METHOD AND DATA REPRODUCING METHOD 失效
标题翻译： OPTISCHES SPEICHERMEDIUM，DATENSPEICHERVERFAHREN UND -WIEDERGABE。
公开(公告)号：EP0441967A1
公开(公告)日：1991-08-21
申请号：EP90912463.8
申请日：1990-08-22
申请人： SONY CORPORATION
发明人： YAMAGAMI, Tamotsu , SAKO, Yoichiro , YAMAMOTO, Masanobu
IPC分类号： G11B7/00 , G11B7/007 , G11B7/24 , G11B11/10
CPC分类号： G11B27/3027 , G11B7/00745 , G11B7/24082 , G11B11/10504 , G11B11/10528 , G11B11/10597 , G11B13/04 , G11B20/1217 , G11B20/1254 , G11B27/24 , G11B2020/10546 , G11B2020/1259 , G11B2220/218 , G11B2220/2525 , G11B2220/2545
摘要： An optical recording medium in which main data are recorded on a recording track that has been formed in advance along the track direction, and the recorded data are read out by optical means. Frame synchronizing signals based on the same format as the main data format are recorded in advance for each frame that serves as a data recording unit utilizing the displacement in the direction of width of the recording track itself, whereby the frame synchronism is easily obtained and the constitution is simplified as a result of using the synchronizing circuit in common. The data to be recorded in advance by displacing the track itself in the direction of width include frame synchronizing signal as well as any reproduction-only data, in order to increase the recording capacity of the disk. The circuit constitution is simplified by using in common the reproducing circuit for reproducing frame synchronizing signals of main data recorded in the track direction of the recording track and the reproducing circuit for reproducing frame synchronizing signals of the same format as the main data in the data recorded being displaced in the direction of track width.
摘要翻译：光记录介质具有记录在沿磁道方向预先形成的记录磁道上的主数据，并且记录数据由光学系统读出。基于与主数据格式相同的格式的帧同步信号预先对于利用记录轨道本身的宽度方向上的位移的数据记录单元的每个帧进行记录，由此容易地获得帧同步，并且作为共同使用同步电路的结果，简化了结构。要通过沿着宽度方向移位磁道本身而预先记录的数据包括帧同步信号以及任何再现数据，以便增加磁盘的记录容量。电路结构通过共同使用用于再现记录在记录磁道的磁道方向上的主数据的帧同步信号的再现电路和用于再现与所记录的数据中的主数据相同格式的帧同步信号的再现电路，沿轨道宽度的方向移位。

15. 发明公开

EP0729150A1 METHOD FOR RECORDING/REPRODUCING DATA, DATA REPRODUCING DEVICE, AND RECORDING MEDIUM 失效
标题翻译：数据记录/重放方法，数据再现设备，以及记录介质
公开(公告)号：EP0729150A1
公开(公告)日：1996-08-28
申请号：EP95930703.4
申请日：1995-09-06
申请人： SONY CORPORATION
发明人： SAKO, Yoichiro , YAMAGAMI, Tamotsu , OTSUKA, Satoshi , TOBITA, Minoru
IPC分类号： G11B20/12
CPC分类号： G11B20/1833 , G11B20/1258 , G11B2020/1272
摘要： Data recorded on such a recording medium as an optical disk, are reproduced excellently even when burst errors occur during reproduction, without reducing the data record capacity of the recording medium. A first error correcting code is generated for every block of a certain amount of data, and added to the corresponding block, a second error correcting code is generated for the every block and added to the other blocks than the block for which the second error correcting code is generated. These data and codes are recorded on the recording medium. When reproducing the data, recorded on the recording medium in blocks of data, whether or not detection correction is possible or not is judged based on the first error correcting codes included in the reproduced data. When the detection correction of a block is possible, the detection correction is performed, and when impossible, missing information is generated based on the second error correcting codes reproduced from the data blocks and corresponding to the block of which detection correction is impossible. Using the missing information and the first error correcting code, missing correction of the data block is performed.

16. 发明授权

EP0465676B1 MAGNETO-OPTICAL RECORDING/REPRODUCING APPARATUS 失效
标题翻译：光磁记录/再现装置。
公开(公告)号：EP0465676B1
公开(公告)日：1995-05-03
申请号：EP91903622.8
申请日：1991-01-30
申请人： SONY CORPORATION
发明人： WATANABE, Tetsu , YAMAGAMI, Tamotsu
IPC分类号： G11B11/10
CPC分类号： G11B11/10532 , G11B11/10552 , G11B11/10584 , G11B11/10597
摘要： A magneto-optical recording/reproducing apparatus which comprises a first optical system (1) provided with a first objective lens (2), a second optical system (21) provided with a second objective lens (22) having a numerical aperture different from that of the first objective lens, and a magnetic head (19) that is provided close to a magneto-optical recording medium for recording and is driven together with the second objective lens (22) in a body. Even when either of a first and a second magneto-optical recording medium (41, 42) having recording densities different from each other is loaded in the magneto-optical recording/reproducing apparatus, the recording or reproducing thereof is possible. Therefore, the compatibility between the first and the second magneto-optical recording medium (41, 42) is obtained.

17. 发明授权

EP0440810B1 OPTICAL RECORDING MEDIUM AND INFORMATION RECORDING APPARATUS 失效
标题翻译： OPTISCHES SPEICHERSYSTEM。
公开(公告)号：EP0440810B1
公开(公告)日：1994-11-30
申请号：EP90912458.8
申请日：1990-08-22
申请人： SONY CORPORATION
发明人： YAMAGAMI, Tamotsu , SAKO, Yoichiro
IPC分类号： G11B7/00 , G11B7/007 , G11B7/26 , G11B11/10
CPC分类号： G11B7/0904 , G11B7/24082 , G11B7/26 , G11B11/10576 , G11B11/10578 , G11B27/19 , G11B27/24 , G11B2220/213 , G11B2220/2525 , G11B2220/2545
摘要： A recording medium capable of reproducing information optically, which has a structure vherein the track shifted in the widthwise direction is preformatted by a signal made by removing high-frequency components from a base band signal of recorded information. A recording apparatus for forming tracks on an optical recording medium capable of reproducing information optically, which includes a deflector for deflecting a recording beam with which the tracks are formed in the widthwise direction of the track, a deflection control signal generator for generating a deflection control signal by which this deflector is controlled and a low-pass filter for removing the high-frequency components of the base band signal of the recorded information, the components being used for producing the deflection control signal in the deflection control signal generator. Thus, adverse influences on the main information recorded onto the tracks are reduced.
摘要翻译：用于以光学方式再现信息的记录介质具有这样一种结构，其中在宽度方向上移动的轨迹通过从记录信息的基带信号中去除高频分量而产生的信号被预格式化。记录装置包括用于偏转轨道在轨道的宽度方向上形成的记录光束的偏转器，用于产生控制偏转器的偏转控制信号的偏转控制信号发生器，以及用于去除记录信息的基带信号的高频分量用于在偏转控制信号发生器中产生偏转控制信号的部件。

18. 发明公开

EP0210275A1 RECORDING/REPRODUCING APPARATUS USING MAGNETO-OPTICAL DISK 有权
标题翻译：与磁光盘刻录机/播放设备。
公开(公告)号：EP0210275A1
公开(公告)日：1987-02-04
申请号：EP86900237.8
申请日：1985-12-05
申请人： SONY CORPORATION
发明人： HENMI, Fumiaki , YAMAGAMI, Tamotsu
IPC分类号： G11B7/09
CPC分类号： G11B11/10595 , G11B7/0941 , G11B11/10506 , G11B11/10576
摘要： A recording/reproducing apparatus comprising a digital modulator circuit (18) which receives digital signals that are to be recorded, means (17) for controlling a laser beam that is guided from a laser source (10) to an optical disk (1) depending upon the output of said digital modulator circuit (18), first optical means (9,8,7,6,4) which guide the laser beam from said laser source (10) to said optical disc (1), second optical means (4,6.11.14.15) which guide the laser beam returning from said optical disk to an optical detector (16), an actuator 15) which is served with a servo error signal obtained from said optical detector (16) and which adjusts the laser beam for said optical disk. a low-pass filter (19) which is served with the output of said digital modulator circuit, and removing means (20.21) that remove low-pass component output signal that has passed through said low-pass filter (19) from said servo error signal. In recording the data, low-pass components are extracted from the digitally modulated output to adjust the gain and, thereby to cancel the low-pass components contained in the servo-error signal. Namely, digitally modulated low-pass components are removed from both the tracking and focussing servo-error signals, making it possible to stably apply a servo signal. In reproducing the data, the power of laser beam is smaller than in recording the data, and the low-pass components in the recorded signals are not so intense as to adversely affect the servo signal Therefore, the modulation system has a mild gain making it possible to highly densely record the data.

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