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11. 发明授权

US06463210B1 Video disc having an aspect ratio information and video disc player having an aspect ratio converting function 失效
标题翻译：具有宽高比信息的视频盘和具有纵横比转换功能的视频盘播放器
公开(公告)号：US06463210B1
公开(公告)日：2002-10-08
申请号：US09638003
申请日：2000-08-14
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： H04N585
CPC分类号： H04N9/7925 , H04N5/85 , H04N9/8205
摘要： Image information is reproduced in respectively correspondence to monitors of different aspect ratios as in the NTSC system or HDTV system adaptive type. The image information recorded on a video disc is reproduced. An ID signal held in the video disc is detected. The aspect ratio of the image information to be generated is designated. Only when the aspect ratio indicated by the detected ID signal differs from the designated aspect ratio, the reproduced image information is converted into the image information of the designated aspect ratio. A standardized image signal is produced on the basis of the converted image information.
摘要翻译：图像信息分别对应于NTSC制或HDTV系统自适应型的不同宽高比的监视器。记录在视频盘上的图像信息被再现。检测保持在视频盘中的ID信号。指定要生成的图像信息的纵横比。只有当由检测到的ID信号指示的宽高比与指定的宽高比不同时，再现的图像信息才被转换成指定宽高比的图像信息。基于转换的图像信息生成标准化图像信号。

12. 发明授权

US5471448A Tracking servo apparatus for use in an optical disk player 失效
标题翻译：用于光盘播放器的跟踪伺服装置
公开(公告)号：US5471448A
公开(公告)日：1995-11-28
申请号：US335086
申请日：1994-11-07
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B7/085 , G11B7/095
CPC分类号： G11B7/08517 , G11B7/0953
摘要： A tracking servo apparatus for an optical disk player enables a braking operation to rapidly draw into tracking servo control even in case of a double density track. The tracking servo apparatus generates an odd/even discrimination signal indicating on which of an odd number track or an even number track a position for reading information by a pick is currently present, samples a tracking error signal according to an edge position of the odd/even discrimination signal, selectively outputs either a positive or a negative section of the tracking error signal according a polarity of the sampled tracking error signal as a brake signal to a driving means for a tracking actuator, and thus draws the position for reading information by a pick-up onto a track which can be put under tracking servo control.
摘要翻译：用于光盘播放器的跟踪伺服装置即使在双重密度轨迹的情况下也能够使制动操作快速地进入跟踪伺服控制。跟踪伺服装置产生奇数/偶数鉴别信号，该奇数/偶数鉴别信号指示当前存在用于通过拾取读取信息的位置的奇数轨道或偶数轨道上的哪一个，根据奇数/偶数轨迹的边缘位置对跟踪误差信号进行采样，偶数鉴别信号，根据作为制动信号的采样跟踪误差信号的极性选择性地将跟踪误差信号的正或负部分输出到用于跟踪致动器的驱动装置，并且因此绘制用于读取信息的位置拾取到可以被跟踪伺服控制的轨道上。

13. 发明授权

US5280462A Disc playing and recording apparatus having a pair of heads controlled to prevent interruptions during play 失效
标题翻译：光盘播放和记录装置具有控制的一对头以防止在播放期间的中断
公开(公告)号：US5280462A
公开(公告)日：1994-01-18
申请号：US617326
申请日：1990-11-23
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： H04N5/76 , G11B7/0045 , G11B7/005 , G11B19/04 , G11B19/06 , G11B20/00 , G11B27/10 , G11B17/22
CPC分类号： G11B27/105 , G11B19/04 , G11B19/06 , G11B7/0045 , G11B7/005
摘要： A disk recording and reproducing apparatus in which the recorded information is read by using a pair of heads alternately. When recording information, the minimum recording time for each group is controlled to be longer than the maximum seek time. When reproducing information, the minimum reading time required for a reading operation is controll to be longer than the maximum seek time, in order that the seek operation will be completed during the reading operation.
摘要翻译：一种磁盘记录和再现装置，其中通过使用一对磁头交替地读取所记录的信息。当记录信息时，每组的最小记录时间被控制为长于最大寻道时间。当再现信息时，读取操作所需的最小读取时间被控制为比最大寻道时间长，以便在读取操作期间完成寻道操作。

14. 发明授权

US5163036A Duty factor control circuit with variable output pulse width function 失效
标题翻译：占空因数控制电路，具有可变输出脉宽功能
公开(公告)号：US5163036A
公开(公告)日：1992-11-10
申请号：US811687
申请日：1991-12-23
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B7/08 , G11B7/125
CPC分类号： G11B7/126 , G11B7/081
摘要： A duty factor control circuit for use in an optical disk apparatus has first and second delay circuits for synchronously extending or shortening the width of an input pulse by equal amounts. The operation of the circuit is such that an output pulse center is synchronized with a center of a falling edge of a clock timing pulse, to compensate for time base errors.
摘要翻译：用于光盘装置的占空因数控制电路具有用于同步地扩展或缩短输入脉冲的宽度相等量的第一和第二延迟电路。电路的操作使得输出脉冲中心与时钟定时脉冲的下降沿的中心同步，以补偿时基误差。

15. 发明授权

US5124808A 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：US5124808A
公开(公告)日：1992-06-23
申请号：US511152
申请日：1990-04-19
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B19/20 , G11B19/28
CPC分类号： G11B19/28 , G11B19/20
摘要： A disk recording/reproducing apparatus includes a spindle control device in which phase control is performed when spindle motor speed is within a predetermined range, and a synchronizing mark detection signal is detected normally. For a composite video signal, a signal synchronization signal may be produced in response to detection of a synchronizing signal within that composite video sinal; phase control may be performed in response to that signal synchronization signal as well. In the absence of one or more of these signals for less than a predetermined time, phase control may be performed based on predetermined phase-difference information. Additionally, an error may be generated if one or more of the above-mentioned signals is absent for longer than a predetermined time.
摘要翻译：磁盘记录/再现装置包括主轴控制装置，其中主轴电机速度在预定范围内执行相位控制，并且正常检测同步标记检测信号。对于复合视频信号，可以响应于该复合视频信号中的同步信号的检测而产生信号同步信号; 也可以响应于该信号同步信号来执行相位控制。在没有一个或多个这些信号小于预定时间的情况下，可以基于预定的相位差信息执行相位控制。另外，如果上述信号中的一个或多个不存在长于预定时间，则可能产生错误。

16. 发明授权

US4974081A Clock pulse generating circuit 失效
标题翻译：时钟脉冲发生电路
公开(公告)号：US4974081A
公开(公告)日：1990-11-27
申请号：US493053
申请日：1990-03-13
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： H04N5/12 , H04N5/937
CPC分类号： H04N5/12 , H04N5/937
摘要： A clock pulse generating circuit is provided which is capable of generating a stabilized clock pulse without being effected by disturbance due to the vertical equalizer pulse. The clock pulse generating circuit includes a PLL circuit for generating a clock pulse which is phase-synchronized with an input signal. The circuit further includes a synchronizing circuit for generating a window pulse synchronized with the horizontal synchronizing signal by being operated with a clock pulse generated by the PLL circuit as a reference. The synchronization condition is judged with respect to the composite synchronizing signal and a gate circuit which permits passage of the composite synchronizing signal only during the period of existence of the window signal. Accordingly, the signal is constructed so as to select the composite synchronizing signal before passage through the gate in an asynchronous condition of the synchronizing circuit. Similarly, the composite synchronizing signal is passed after passage through the gate in a synchronous condition, the composite synchronizing signal being used as the input to the PLL circuit.
摘要翻译：提供了一种时钟脉冲发生电路，其能够产生稳定的时钟脉冲而不受垂直均衡器脉冲引起的干扰影响。时钟脉冲发生电路包括用于产生与输入信号相位同步的时钟脉冲的PLL电路。该电路还包括一个同步电路，用于通过用PLL电路产生的时钟脉冲作为参考来产生与水平同步信号同步的窗口脉冲。相对于复合同步信号和门电路来判断同步条件，该门电路只允许在窗口信号存在期间通过复合同步信号。因此，信号被构造成在同步电路的异步状态下通过栅极之前选择复合同步信号。类似地，复合同步信号在同步状态下通过栅极之后通过，复合同步信号用作PLL电路的输入。

17. 发明授权

US4933922A Apparatus for generating a tracking error signal 失效
标题翻译：用于产生跟踪误差信号的装置
公开(公告)号：US4933922A
公开(公告)日：1990-06-12
申请号：US273543
申请日：1988-11-21
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B7/095 , G11B7/09 , G11B21/10
CPC分类号： G11B7/0901
摘要： A tracking error signal generating apparatus for use in a recording and reproducing system employing a disk on which is formed an information track comprising a pair of tracking markers and a time-division servo signal including a sync signal. An error is calculated from any two of the tracking marker data obtained from the disc and a series of error data is generated. Furthermore, a series of corrected error data is generated by respectively inserting at least one neighboring value of adjacent two data between the adjacent two data of the error data, and each of the corrected error data are converted to form an analog signal.
摘要翻译：一种跟踪误差信号发生装置，用于采用其上形成有包括一对跟踪标记的信息轨道和包括同步信号的时分伺服信号的盘的记录和再现系统。从从盘获得的任何两个跟踪标记数据计算错误，并生成一系列错误数据。此外，通过在误差数据的相邻两个数据之间分别插入相邻两个数据的至少一个相邻值来生成一系列校正误差数据，并且将每个校正后的误差数据转换成模拟信号。

18. 发明授权

US4879705A Automatic loading disc player 失效
标题翻译：自动加载光盘播放器
公开(公告)号：US4879705A
公开(公告)日：1989-11-07
申请号：US244641
申请日：1988-09-12
申请人： Yoshio Aoyagi , Hiroyuki Hirano , Toshiyuki Kimura , Susumu Niinuma , Minoru Yoshioka , Akira Haeno , Takashi Sato , Yoshiro Nishi , Yoshihiko Watanabe , Fumihiko Yokogawa , Keiichi Matsumoto , Youichi Ogawa
发明人： Yoshio Aoyagi , Hiroyuki Hirano , Toshiyuki Kimura , Susumu Niinuma , Minoru Yoshioka , Akira Haeno , Takashi Sato , Yoshiro Nishi , Yoshihiko Watanabe , Fumihiko Yokogawa , Keiichi Matsumoto , Youichi Ogawa
IPC分类号： G11B7/09 , G11B17/04 , G11B21/08 , G11B27/10
CPC分类号： G11B17/051 , G11B21/085 , G11B27/105 , G11B7/0946
摘要： A disc player comprising a signal pickup unit to read information from a disc on which program information including address information is recorded, the signal pickup unit being movable with respect to the disc, pickup drive means to drive the pickup unit for movement with respect to the disc, and a control circuit including an address memory for storing the newest one of the addresses read from the disc, a counter operative to count addresses at predetermined time intervals for producing a signal representative of an expected address indicative of the position to which the pickup unit is expected to move in the next, the expected address being updated at predetermined time intervals, a detector circuit to produce a signal each time a discrepancy is found to exist between the newest address and the expected address. In response to the signal from the detector circuit, the pickup drive means is actuated to drive the pickup unit for movement to the position dictated by the newest address or the expected address.
摘要翻译：一种光盘播放器，包括信号拾取单元，用于从盘上读取包含地址信息的节目信息的信息，信号拾取单元可相对于盘移动;拾取驱动装置，用于驱动拾取单元相对于盘，以及包括用于存储从盘读取的最新地址的地址存储器的控制电路，用于以预定时间间隔对地址进行计数的计数器，用于产生代表指示拾取器的位置的预期地址的信号预期单元在下一个移动，预期地址以预定的时间间隔更新，检测器电路每当在最新地址和预期地址之间存在差异时产生信号。响应于来自检测器电路的信号，拾取器驱动装置被致动以驱动拾取单元移动到由最新地址或预期地址指定的位置。

19. 发明授权

US4787078A Optical data recording and reproducing system with control of high frequency superposed signal applied to semiconductor laser 失效
标题翻译：具有控制半导体激光器高频叠加信号的光学数据记录和再现系统
公开(公告)号：US4787078A
公开(公告)日：1988-11-22
申请号：US026704
申请日：1987-03-17
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B7/125 , G11B19/02 , H01S5/062 , H01S5/068 , H01S5/0683
CPC分类号： G11B7/126 , G11B19/02 , H01S5/06213 , H01S5/068 , H01S5/06832
摘要： In an optical data recording and reproducing system in which recording and reproducing data are carried out with a semiconductor laser, circuitry is provided to reduce the level of a high frequency current to be superposed on the laser during a data recording operation relative to the level during a data reproducing operation, to provide laser output only when necessary, to prolong laser life.
摘要翻译：在其中利用半导体激光器进行记录和再现数据的光学数据记录和再现系统中，提供电路，以便在数据记录操作期间降低在叠加在激光器上的高频电流的电平相对于在数据再现操作，仅在必要时提供激光输出，以延长激光寿命。

20. 发明授权

US4637003A Amplitude modulated high frequency signal detection device 失效
标题翻译：幅度调制高频信号检测装置
公开(公告)号：US4637003A
公开(公告)日：1987-01-13
申请号：US683393
申请日：1984-12-19
申请人： Fumihiko Yokogawa
发明人： Fumihiko Yokogawa
IPC分类号： G11B7/00 , G11B7/005 , G11B7/085 , G11B7/13 , G11B20/02 , G11B20/08 , G11B21/08 , G11B33/10 , H03D1/10 , H03D3/00 , G11B21/10 , H03K5/153
CPC分类号： G11B21/08 , G11B20/02 , G11B33/10 , G11B7/005 , G11B7/13 , H03D1/10
摘要： A high frequency signal detection device to be used in an information playback system for playing back signals from a record medium having a plurality of record tracks, includes first and second positive peak hold circuits having different time constant and a negative peak hold circuit. A difference circuit is provided to generate a difference signal between output signals of the first positive peak hold circuit and the negative peak hold circuit and an output signal of the difference circuit is compared with an output signal of the second positive peak hold circuit, to produce a high frequency signal detection signal. Thus, a very accurate detection signal is produced irrespective of the polarity of the input signal and whether or not the envelope of the high frequency signal is symmetric.
摘要翻译：在用于从具有多个记录磁道的记录介质播放信号的信息重放系统中使用的高频信号检测装置包括具有不同时间常数的第一和第二正峰值保持电路和负峰值保持电路。提供差分电路以在第一正峰值保持电路和负峰值保持电路的输出信号之间产生差分信号，并将差分电路的输出信号与第二正峰值保持电路的输出信号进行比较，以产生高频信号检测信号。因此，与输入信号的极性无关地产生非常准确的检测信号，以及高频信号的包络是否对称。

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