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1.发明授权
公开(公告)号：EP0678860B1
公开(公告)日：2000-07-05
申请号：EP95105886.6
申请日：1995-04-20
发明人： Kimura, Yasuyuki , Yamazaki, Koichi
CPC分类号： G11B7/0033 , G11B7/08529
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2.发明授权
公开(公告)号：EP0548981B1
公开(公告)日：1998-03-18
申请号：EP92121962.2
申请日：1992-12-23
发明人： Noda, Kazuo , Kimura, Yasuyuki
CPC分类号： G11B19/04 , G11B7/0045 , G11B7/0948 , G11B27/36
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3.发明公开Servo control technique for an optical recording and reproducing system 失效Servoantriebstechnik eines optischen Aufzeichnungs- und Wiedergabesystems。
公开(公告)号：EP0661697A1
公开(公告)日：1995-07-05
申请号：EP94119454.0
申请日：1994-12-09
IPC分类号： G11B7/09
CPC分类号： G11B7/0941
摘要： In a tracking or focusing servo control loop (3b, 3c, 41, 20; 3a, 42, 21), there are provided a switch element (6a; 6c) for switch-controlling a tracking or focusing error signal, and a smoothing circuit (7a; 7c) for switching passage the error signal. An amount of detected reflection from an optical recording medium (11) is monitored by a controller section (3b, 3c, 5a, 6b, 7b, 8a; 3a, 5b, 6d, 7d, 8b), and the switching action of the switch element is ON/OFF-controlled by the controller section so as to maintain a servo loop gain at a predetermined standard. Thus, it is possible to maintain a constant servo loop gain without being influenced by variation in the laser light amount or difference in reflectivity characteristics of the recording layers of individual optical recording media, and constantly stable tracking servo control and/or focusing servo control can be performed.
摘要翻译： 在跟踪或聚焦伺服控制回路（3b，3c，41,20; 3a，42,21）中，设置有用于切换控制跟踪或聚焦误差信号的开关元件（6a; 6c）和平滑电路 （7a; 7c），用于切换通过误差信号。 通过控制器部分（3b，3c，5a，6b，7b，8a; 3a，5b，6d，7d，8b）监视来自光学记录介质（11）的检测到的反射量，并且开关 元件由控制器部分进行ON / OFF控制，以便将伺服环路增益保持在预定标准。 因此，可以在不受激光量的变化或各个光记录介质的记录层的反射率特性的差异的影响的情况下保持恒定的伺服环路增益，并且可以持续稳定的跟踪伺服控制和/或聚焦伺服控制 被执行。
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4.发明授权
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5.发明公开Error correction coding and decoding circuit for digitally coded information 失效用于数字编码信息的错误校正编码和解码电路
公开(公告)号：EP0306020A3
公开(公告)日：1991-04-24
申请号：EP88114279.8
申请日：1988-09-01
IPC分类号： H03M13/00
摘要： An error correction coding and decoding circuit for digitally coded information in which a majority difference set cyclic code is used to apply error correction coding and decoding to a data signal having data bits suitably assigned to information bits and parity bits, characterized in that a clock signal (CLKC) for the internal operation of the circuit, a data load clock signal for loading data onto the circuit, and a data read clock signal for reading data from the circuit are delivered from an external circuit provided separately from the error correction coding and decoding circuit.
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6.发明公开Error correction coding and decoding circuit for digitally coded information 失效Fehler-Korrektur-Codierungs- und Decodierungsschaltungfürdigital codierte信息。
公开(公告)号：EP0306020A2
公开(公告)日：1989-03-08
申请号：EP88114279.8
申请日：1988-09-01
IPC分类号： H03M13/00
摘要： An error correction coding and decoding circuit for digitally coded information in which a majority difference set cyclic code is used to apply error correction coding and decoding to a data signal having data bits suitably assigned to information bits and parity bits, characterized in that a clock signal (CLKC) for the internal operation of the circuit, a data load clock signal for loading data onto the circuit, and a data read clock signal for reading data from the circuit are delivered from an external circuit provided separately from the error correction coding and decoding circuit.
摘要翻译： 一种用于数字编码信息的纠错编码和解码电路，其中使用多数差分集循环码来对具有适当分配给信息比特和奇偶校验位的数据比特的数据信号应用纠错编码和解码，其特征在于时钟信号 （CLKC），用于将数据加载到电路上的数据负载时钟信号和用于从电路读取数据的数据读取时钟信号从与纠错编码和解码单独设置的外部电路传送 电路。
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公开(公告)号：EP0661697B1
公开(公告)日：2000-03-08
申请号：EP94119454.0
申请日：1994-12-09
IPC分类号： G11B7/09
CPC分类号： G11B7/0941
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8.发明公开Method of and apparatus for recording and reproducing optical information 失效Verfahren undGerätzur optischen Aufzeichnung und Wiedergabe der Information。
公开(公告)号：EP0678860A1
公开(公告)日：1995-10-25
申请号：EP95105886.6
申请日：1995-04-20
发明人： Kimura, Yasuyuki , Yamazaki, Koichi
CPC分类号： G11B7/0033 , G11B7/08529
摘要： For recording or reproduction of information, the optical beam is moved relative to the recording medium (11) along the longitudinal direction of a certain track (14). When accessing another track, the relative movement of the light beam along the longitudinal direction of the track is decelerated, and during this deceleration, the light beam is started to move in the direction transverse to the tracks toward the desired track. Thus, it is not necessary to wait for such time when the relative movement of the light beam along the longitudinal direction of the track has been completely stopped, and hence the necessary accessing time can substantially be reduced. If control is made to cause a decelerating rate of the relative movement to decrease continuously gradually or stepwise from a relatively high decelerating rate to a relatively low rate and the light beam is caused to start relatively moving toward the desired track while the relative movement is at the relatively low decelerating rate, it is allowed to effectively suppress occurrence of unwanted mechanical vibration due to abrupt deceleration of the relative movement.
摘要翻译： 为了记录或再现信息，光束沿着某个轨道（14）的纵向方向相对于记录介质（11）移动。 当进入另一个轨道时，光束沿着轨道的纵向方向的相对移动减速，并且在该减速期间，光束开始沿着横向于轨迹的方向朝期望的轨道移动。 因此，当光束沿着轨道的纵向的相对移动已经完全停止时，不需要等待这样的时间，因此可以显着地减少必要的访问时间。 如果进行控制使得相对运动的减速率从相对较高的减速速率逐渐或逐步地减小到相对较低的速率，并且使光束在相对运动处于 相对较低的减速率，能够有效地抑制由于相对运动的急剧减速引起的不希望的机械振动的发生。
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公开(公告)号：EP0548981A3
公开(公告)日：1995-01-25
申请号：EP92121962.2
申请日：1992-12-23
发明人： Noda, Kazuo , Kimura, Yasuyuki
CPC分类号： G11B19/04 , G11B7/0045 , G11B7/0948 , G11B27/36
摘要： In an optical information recording and reproducing apparatus, the recording operation is interrupted when an information pit, dust, scratch, stain, etc. is present on an optical recording medium. However, the recording operation is resumed and kept continued when a dust, scratch, stain, etc. other than the information pit is present on the medium. The apparatus comprises a double recording detecting circuit for detecting a pseudo double recording signal generated by a dust, scratch, stain, etc. on the medium at a period of a recording operation; and a recording signal supply circuit for interrupting the recording operation when the double recording detecting circuit detects the pseudo double recording signal to switch the recording period to a monitor period, for maintaining the interruption of the recording operation when a real double recording signal generated by an information pit is detected at the monitor period, and for resuming the recording operation when the real double recording signal generated by an information pit is not detected at the monitor period. After the recording operation has been resumed and further when the pseudo double recording signal generated by a dust, scratch, stain, etc. still remaining on the medium is detected, the monitor and recording periods are repeated alternately. However, after the medium has become free from a dust, scratch, stain, etc. finally and therefore the real and pseudo double recording signals are not both generated, the recording operation is kept continued normally.
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10.发明公开Optical information recording and reproducing apparatus 失效Optisches Informationsaufzeichnung- undWiedergabegerät。
公开(公告)号：EP0548981A2
公开(公告)日：1993-06-30
申请号：EP92121962.2
申请日：1992-12-23
发明人： Noda, Kazuo , Kimura, Yasuyuki
CPC分类号： G11B19/04 , G11B7/0045 , G11B7/0948 , G11B27/36
摘要： In an optical information recording and reproducing apparatus, the recording operation is interrupted when an information pit, dust, scratch, stain, etc. is present on an optical recording medium. However, the recording operation is resumed and kept continued when a dust, scratch, stain, etc. other than the information pit is present on the medium. The apparatus comprises a double recording detecting circuit for detecting a pseudo double recording signal generated by a dust, scratch, stain, etc. on the medium at a period of a recording operation; and a recording signal supply circuit for interrupting the recording operation when the double recording detecting circuit detects the pseudo double recording signal to switch the recording period to a monitor period, for maintaining the interruption of the recording operation when a real double recording signal generated by an information pit is detected at the monitor period, and for resuming the recording operation when the real double recording signal generated by an information pit is not detected at the monitor period. After the recording operation has been resumed and further when the pseudo double recording signal generated by a dust, scratch, stain, etc. still remaining on the medium is detected, the monitor and recording periods are repeated alternately. However, after the medium has become free from a dust, scratch, stain, etc. finally and therefore the real and pseudo double recording signals are not both generated, the recording operation is kept continued normally.
摘要翻译： 在光学信息记录和再现装置中，当光学记录介质上存在信息坑，灰尘，划痕，污点等时，记录操作被中断。 然而，当在介质上存在除了信息坑之外的灰尘，划痕，污点等时，恢复并继续记录操作。 该装置包括双重记录检测电路，用于在记录操作期间检测在介质上由灰尘，划痕，污点等产生的伪双重记录信号; 以及记录信号提供电路，用于当双重记录检测电路检测到伪双重记录信号以将记录周期切换到监视周期时中断记录操作，以便在由 在监视期间检测到信息坑，并且在监视期间未检测到由信息坑产生的实际双重记录信号时恢复记录操作。 在已经恢复记录操作之后，并且当检测到仍然存在于介质上的灰尘，划痕，污点等产生的伪双重记录信号时，交替重复监视和记录周期。 然而，在介质最终没有灰尘，划痕，污渍等之后，因此不会同时产生真实和伪双重记录信号，所以记录操作保持正常。
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