公开(公告)号：US5274617A

公开(公告)日：1993-12-28

申请号：US528370

申请日：1990-05-25

申请人： Shigeo Terashima ,  Toshihisa Deguchi ,  Kunio Kojima ,  Shigema Maeda

发明人： Shigeo Terashima ,  Toshihisa Deguchi ,  Kunio Kojima ,  Shigema Maeda

IPC分类号： G11B7/004 ,  G11B7/007 ,  G11B11/105 ,  G11B19/04 ,  G11B27/034 ,  G11B27/036 ,  G11B27/11 ,  G11B27/32 ,  G11B27/34 ,  G11B27/36 ,  G11B15/04 ,  G11B7/00

CPC分类号： G11B27/11 ,  G11B11/10502 ,  G11B11/10595 ,  G11B19/04 ,  G11B27/034 ,  G11B27/036 ,  G11B27/329 ,  G11B27/34 ,  G11B27/36 ,  G11B7/004 ,  G11B7/007 ,  G11B2220/2525 ,  G11B2220/65

摘要： A recording and reproducing device, which records and reproduces information on and from a rewritable recording medium having absolute addresses and including an information recording area wherein information entered from external devices is recorded and a Table of Contents area wherein additional address information with respect to the information recorded in the information recording area is recorded. The TOC area contains the absolute addresses of the recording positions of each information recorded in the information recording area. A display section graphically and independently displays the recorded and unrecorded ranges of the information recording area according to the absolute addresses recorded in the TOC area with respect to the recording positions of each piece of information. A warning device alerts the user that a position on the disc is occupied by referring TOC area when it is instructed to record new information in the position of the information recording area where another information has already been recorded.

摘要翻译： 一种记录和再现设备，其记录和重放具有绝对地址的可重写记录介质上的信息，并且包括其中记录了从外部设备输入的信息的信息记录区域，以及一个目录区域，其中关于该信息的附加地址信息 记录在信息记录区中的记录。 TOC区域包含记录在信息记录区域中的每个信息的记录位置的绝对地址。 显示部分根据相对于每条信息的记录位置记录在TOC区域中的绝对地址图形地和独立地显示信息记录区域的记录和未记录的范围。 当指示在记录了其他信息的信息记录区域的位置记录新信息时，警告装置通知引导TOC区域来警告用户盘上的位置。

公开(公告)号：US5546364A

公开(公告)日：1996-08-13

申请号：US311452

申请日：1994-09-26

申请人： Hiroshi Fuji ,  Toshihisa Deguchi ,  Kunio Kojima ,  Takeshi Yamaguchi ,  Shigeo Terashima ,  Akira Takahashi ,  Kenji Ohta

发明人： Hiroshi Fuji ,  Toshihisa Deguchi ,  Kunio Kojima ,  Takeshi Yamaguchi ,  Shigeo Terashima ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/013 ,  G11B11/105 ,  G11B13/04 ,  G11B7/12 ,  G11B11/12

CPC分类号： G11B7/24085 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10528 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/013

摘要： A magneto-optical memory apparatus for enhancing the recording density of a magneto-optical recording medium, thereby to increase its recording capacity. The magneto-optical recording medium having recording marks, each having two ends in which information is recorded. The apparatus also includes an optical head arranged such that at the time of recording onto the magneto-optical recording medium, the recording marks are recorded such that the ends of each recording mark correspond to a second code of digital information composed of two different types of codes; at the time of reproduction, a light beam having a condensing spot is projected to the magneto-optical recording medium and, when a reproduction light containing reproduction information is entered to the optical head from the magneto-optical recording medium, a reproduction signal is supplied; and when the light beam is projected to a recording mark, an information pulse corresponding to the second code is generated in the reproduction signal, only when the reproduction light from the recording mark interferes with the reproduction light from the non-marking part; and a signal detector circuit for detecting the information pulse in the reproduction signal obtained from the optical head and for converting the reproduction signal into a digital reproduction signal.

摘要翻译： 一种用于增强磁光记录介质的记录密度的磁光存储装置，从而提高其记录容量。 具有记录标记的磁光记录介质，每个记录标记具有记录信息的两端。 该装置还包括一个光学头，其被配置为使得在记录到磁光记录介质上时，记录标记被记录为使得每个记录标记的端部对应于由两种不同类型的 代码; 在再现时，将具有聚光点的光束投影到磁光记录介质，并且当从磁光记录介质将包含再现信息的再现光输入到光头时，提供再现信号 ; 并且当光束投射到记录标记时，只有当来自记录标记的再现光干扰来自非标记部分的再现光时，才在再现信号中产生与第二代码相对应的信息脉冲; 以及信号检测器电路，用于检测从光头获得的再现信号中的信息脉冲，并将再现信号转换成数字再现信号。

公开(公告)号：US4954903A

公开(公告)日：1990-09-04

申请号：US245771

申请日：1988-09-19

申请人： Hiroshi Fuji ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima ,  Tsuneo Fujiwara

发明人： Hiroshi Fuji ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima ,  Tsuneo Fujiwara

IPC分类号： G11B20/10

CPC分类号： G11B20/10009

摘要： A digital signal reproduction apparatus includes a first differential circuit for differentiating a reproduction signal reproduced from a recording medium. This differential circuit outputs a first order differential signal and second differential circuit differentiates the first order differential signal of the reproduction signal and outputs a second order differential signal. A comparator compares the second order differential signal with a predetermined level to produce a window signal. A peak detecting circuit detects zero-cross points in the first order differential signal and outputs a peak detecting signal. A gate gates the peak detecting signal with the window signal to output a reproduction data signal.

公开(公告)号：US4906874A

公开(公告)日：1990-03-06

申请号：US299001

申请日：1989-01-19

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/125 ,  G11B7/13 ,  G11B11/105 ,  G11B19/04 ,  G11B20/24

CPC分类号： G11B7/126 ,  G11B11/10502 ,  G11B11/10595 ,  G11B19/04 ,  G11B7/00 ,  G11B7/004 ,  G11B7/13

摘要： An analog signal switching device for use in an optical memory device having a recording/erasing mode and a mode other than the recording/erasing mode is disclosed. The switching device includes a source for producing a switch control signal which is HIGH during the recording/erasing mode and LOW during the mode other than the recording/erasing mode. An analog switch is provided for receiving a direct input analog signal and a held input signal and for providing as output the direct input signal during the LOW state of the switch control signal, and the held input signal during the HIGH state of the switch control signal by a switching operation. Further provided is a mask signal generator for generating a mask signal which covers a period during the HIGH state of the switch control signal so as to cover a period during the switching operation of the analog switch, and a gate circuit controlled by the mask signal for allowing the direct input analog signal to pass therethrough during the absence of the mask signal and for preventing the held input signal to pass therethrough during the presence of the mask signal. Thus, noise signals produced by the switching operation of the analog switch are eliminated.

公开(公告)号：US5170389A

公开(公告)日：1992-12-08

申请号：US538340

申请日：1990-06-15

申请人： Tomiyuki Numata ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Tomiyuki Numata ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B7/125 ,  H01S5/068

CPC分类号： G11B7/126 ,  H01S5/06825

摘要： The invention provides an improvement of the conventional laser driving circuit mainly including a control logic circuit, a reproducing power producing circuit, and a recording power producing circuit for preventing a recording film of a disk from being damaged by a laser in a reproducing mode. The improved respect is addition of a voltage monitoring circuit and a bypass transistor for an abnormal signal. The voltage monitoring circuit monitors a voltage drop caused in the control logic circuit and supplies a voltage abnormality indicating signal, thereby causing the bypass transistor to be conductive for allowing the abnormal signal to be flown therethrough.

公开(公告)号：US5166838A

公开(公告)日：1992-11-24

申请号：US498710

申请日：1990-03-26

申请人： Hiroshi Fuji ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima ,  Tsuneo Fujiwara

发明人： Hiroshi Fuji ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima ,  Tsuneo Fujiwara

IPC分类号： G11B20/10

CPC分类号： G11B20/10009

摘要： A digital signal reproduction apparatus includes a first differential circuit for differentiating a reproduction signal reproduced from a recording medium. This differential circuit outputs a first order differential signal. A second differential circuit differentiates the first order differential signal of the reproduction signal and outputs a second order differential signal. A comparator compares the second order differential signal with a predetermined level to produce a window signal. A peak detecting circuit detects zero-cross points in the first order differential signal and outputs a peak detecting signal. A gate gates the peak detecting signal with the window signal to output a reproduction data signal.

摘要翻译： 数字信号再现装置包括用于区分从记录介质再现的再现信号的第一差分电路。 该差分电路输出一阶差分信号。 第二差分电路区分再现信号的一阶差分信号并输出​​二阶微分信号。 比较器将二阶差分信号与预定电平进行比较以产生窗口信号。 峰值检测电路检测一阶差分信号中的零交叉点，并输出峰值检测信号。 门通过窗口信号对峰值检测信号进行门极输出再现数据信号。

公开(公告)号：US5010540A

公开(公告)日：1991-04-23

申请号：US225892

申请日：1988-07-29

申请人： Hiroshi Fuji ,  Tsuneo Fujiwara ,  Takashi Iwaki ,  Tomiyuki Numata ,  Kentaroh Tsuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Tsuneo Fujiwara ,  Takashi Iwaki ,  Tomiyuki Numata ,  Kentaroh Tsuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B19/247

CPC分类号： G11B19/247

摘要： An apparatus for recording and reproducing information on and from an optical disk includes a first control for producing a first control signal for controlling the rotational speed of a rotational driving apparatus, on the basis of the detected radial position; a judging apparatus which judges whether or not the reproduced signals are reproduced from a recorded region of the optical disk; a second control for producing a second control signal for controlling the rotational speed of the rotational driving apparatus, on the basis of the signals reproduced from the disk; and a switch apparatus which switches the circuit so that the rotational driving apparatus is controlled by the first control signal when the reproduced signals are not reproduced from a non-recorded region, and controlled by the second control signal when the reproduced signals are reproduced from a recorded region.

公开(公告)号：US4910479A

公开(公告)日：1990-03-20

申请号：US299013

申请日：1989-01-19

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B11/105 ,  G11B19/02 ,  G11B20/10

CPC分类号： G11B20/10027 ,  G11B11/10515 ,  G11B11/10597 ,  G11B19/02 ,  G11B20/10009 ,  G11B7/005

摘要： An automatic gain control device for use in an optical memory device has a circuit for producing an amplification control signal which is fed back to a gain control amplifier through a sample-hold circuit. A pulse train detection circuit is provided for detecting the pulse train indicating that the data stored are a on the optical memory device is being playedback. When the pulse train is detected, the sample-hold circuit is made inactive so that the amplification control signal is directly fed back to the gain control amplifier, and when the pulse train ends, the sample-hold circuit is made active to hold the amplification control signal obtained at the end of the pulse train and to produce the amplification control signal held in the sample-hold circuit.

公开(公告)号：US5432768A

公开(公告)日：1995-07-11

申请号：US079743

申请日：1993-06-22

申请人： Shigeo Terashima ,  Toshihisa Deguchi ,  Kunio Kojima ,  Shigemi Maeda

发明人： Shigeo Terashima ,  Toshihisa Deguchi ,  Kunio Kojima ,  Shigemi Maeda

IPC分类号： G11B7/004 ,  G11B7/007 ,  G11B11/105 ,  G11B19/04 ,  G11B27/034 ,  G11B27/036 ,  G11B27/11 ,  G11B27/32 ,  G11B27/34 ,  G11B27/36 ,  G11B7/00

CPC分类号： G11B27/11 ,  G11B11/10502 ,  G11B11/10595 ,  G11B19/04 ,  G11B27/034 ,  G11B27/036 ,  G11B27/329 ,  G11B27/34 ,  G11B27/36 ,  G11B7/004 ,  G11B7/007 ,  G11B2220/2525 ,  G11B2220/65

摘要： A recording and reproducing device, which records and reproduces information on and from a rewritable recording medium having absolute addresses and including an information recording area wherein information entered from external devices is recorded and a Table of Contents area wherein additional address information with respect to the information recorded in the information recording area is recorded. The TOC area contains the absolute addresses of the recording positions of each information recorded in the information recording area. A display section graphically and independently displays the recorded and unrecorded ranges of the information recording area according to the absolute addresses recorded in the TOC area with respect to the recording positions of each piece of information. A warning device alerts the user that a position on the disc is occupied by referring TOC area when it is instructed to record new information in the position of the information recording area where another information has already been recorded.

摘要翻译： 一种记录和再现设备，其记录和重放具有绝对地址的可重写记录介质上的信息，并且包括其中记录了从外部设备输入的信息的信息记录区域，以及一个目录区域，其中关于该信息的附加地址信息 记录在信息记录区中的记录。 TOC区域包含记录在信息记录区域中的每个信息的记录位置的绝对地址。 显示部分根据相对于每条信息的记录位置记录在TOC区域中的绝对地址图形地和独立地显示信息记录区域的记录和未记录的范围。 当指示在记录了其他信息的信息记录区域的位置记录新信息时，警告装置通知引导TOC区域来警告用户盘上的位置。

公开(公告)号：US5142521A

公开(公告)日：1992-08-25

申请号：US528497

申请日：1990-05-25

申请人： Shigeo Terashima ,  Toshihisa Deguchi ,  Kunio Kojima ,  Shigemi Maeda

发明人： Shigeo Terashima ,  Toshihisa Deguchi ,  Kunio Kojima ,  Shigemi Maeda

IPC分类号： G11B7/004 ,  G11B7/007 ,  G11B11/105 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B27/034 ,  G11B27/32

CPC分类号： G11B20/10 ,  G11B11/10563 ,  G11B11/10595 ,  G11B19/28 ,  G11B27/034 ,  G11B27/329 ,  G11B7/004 ,  G11B7/007 ,  G11B20/1258 ,  G11B2220/2525

摘要： A recording/reproducing device performs the recording/reproduction on a recording medium having an information recording area and a table of contents area. The recording medium is provided with guiding grooves that snake in cycles corresponding to values of absolute addresses. The device divides the information recording area into a plurality of domains. Each domain corresponds to a single sampling frequency with respect to the information being recorded. An electromagnet and an optical head record information in the domain that corresponds to its sampling frequency and records additional information concerning the division in the table of contents. A spindle motor drives the disk which is adjusted such that the velocity of the disk is changed for each domain during recording and reproduction. A demodulator obtains the absolute addresses through demodulation by comparing frequencies determined from the snaking cycles of the guiding grooves with a reference frequency. An operational circuit converts the demodulated absolute addresses in accordance with the velocity of the disk into corrected absolute addresses that represented the period of time which has elapsed since the starting time. As a result, the burden imposed on the spindle motor is relieved, the demodulation of the absolute addresses may be executed accurately even when the rotational speed of the disk varies, and the time elapsed since the start of the recording/reproduction may be determined.

摘要翻译： 记录/再现装置在具有信息记录区和内容区表的记录介质上执行记录/再现。 记录介质设置有与绝对地址值相对应的循环蛇形引导槽。 该设备将信息记录区域划分成多个域。 每个域对应于相对于正在记录的信息的单个采样频率。 一个电磁体和一个光头记录了与其采样频率相对应的域中的信息，并且记录了关于内容表中的划分的附加信息。 主轴电动机驱动盘，其被调整为使得在记录和再现期间每个域改变盘的速度。 解调器通过将从引导槽的蛇形周期确定的频率与参考频率进行比较来获得解调的绝对地址。 操作电路根据盘的速度将解调的绝对地址转换成表示自开始时间以来经过的时间段的校正绝对地址。 结果，减轻了主轴电机的负担，即使当盘的转速变化时也可以精确地执行绝对地址的解调，并且可以确定从记录/再现开始以来经过的时间。