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1. 发明授权

US4906874A Analog signal switching device for use in an optical memory 失效
标题翻译：用于光存储器的模拟信号切换装置
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.

2. 发明授权

US5010540A Apparatus for recording and reproducing information on and from an optical disk 失效
标题翻译：用于在光盘上记录和再现信息的装置
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.

3. 发明授权

US4910479A Automatic gain control device for use in an optical memory device 失效
标题翻译：用于光存储器件的自动增益控制装置
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.

4. 发明授权

US4999824A Magneto-optical memory device 失效
标题翻译：磁光存储器件
公开(公告)号：US4999824A
公开(公告)日：1991-03-12
申请号：US440261
申请日：1989-11-22
申请人： Hiroshi Fuji , Shigemi Maeda , Noriaki Sakamoto , Shigeo Terashima , Takeshi Yamaguchi , Kentaro Tsuji , Kunio Kojima
发明人： Hiroshi Fuji , Shigemi Maeda , Noriaki Sakamoto , Shigeo Terashima , Takeshi Yamaguchi , Kentaro Tsuji , Kunio Kojima
IPC分类号： G11B7/004 , G11B11/105 , G11B27/30
CPC分类号： G11B11/10504 , G11B11/10515 , G11B11/10517 , G11B11/10597 , G11B27/30 , G11B7/004
摘要： An magneto-optical memory device for recording, reproducing or erasing information by applying an optical beam such as a laser beam onto a magneto-optical recording medium, the magneto optical memory device including a recorded region detecting circuit for detecting information recorded region formed in the recording medium. In the memory, a timing control for recording, reproducing or erasing is performed with the use of one result obtained through detection of a synchronizing signal such as a sector mark indicative of a starting point of an information block and another result obtained through detection in the recorded region detecting circuit. The recorded region detecting circuit comprises a pair of peak hold circuits for detecting a peak levels of the playback signals and first and second selecting circuits for selecting one of the reproduced signals and for selecting one of two reference voltages with different voltage levels, respectively smoothing the playback signal, and a comparator for comparing the outputs of the first and second selecting circuits.

5. 发明授权

US5134607A Optical memory system for generating a timing control signal for detecting a recorded region through a playback signal 失效
标题翻译：光存储系统，用于产生用于通过重放信号检测记录区域的定时控制信号
公开(公告)号：US5134607A
公开(公告)日：1992-07-28
申请号：US564799
申请日：1990-08-09
申请人： Hiroshi Fuji , Shigemi Maeda , Noriaki Sakamoto , Shigeo Terashima , Takeshi Yamaguchi , Kentaro Tsuji , Kunio Kojima
发明人： Hiroshi Fuji , Shigemi Maeda , Noriaki Sakamoto , Shigeo Terashima , Takeshi Yamaguchi , Kentaro Tsuji , Kunio Kojima
IPC分类号： G11B7/004 , G11B11/105 , G11B27/30
CPC分类号： G11B11/10504 , G11B11/10515 , G11B11/10517 , G11B11/10597 , G11B27/30 , G11B7/004
摘要： An optical memory device for recording, reproducing, or erasing information applies an optical beam such as a laser beam onto a recording medium. The optical memory device includes a recorded region detecting circuit for detecting information recorded region formed in the recording medium. In the optical memory device, a timing control for recording, reproducing, or erasing is performed with the use of a result obtained through detection of a synchronizing signal, such as a sector mark, indicative of a starting point of an information block and another result obtained through detection in the recorded region detecting circuit. The recorded region detecting circuit includes either at least one peak hold circuit for detecting a peak level of the playback signal or a low pass filter for smoothing the playback signal, and a comparator for comparing an output obtained through the peak hold circuit or through the low pass filter with a reference voltage.
摘要翻译：用于记录，再现或擦除信息的光学存储器件将诸如激光束的光束应用到记录介质上。光学存储器件包括用于检测在记录介质中形成的信息记录区域的记录区域检测电路。在光学存储器件中，通过使用通过检测指示信息块的起点的同步信号（例如扇区标记）和另一结果而获得的结果来执行用于记录，再现或擦除的定时控制通过在记录区域检测电路中的检测获得。记录区域检测电路包括用于检测重放信号的峰值电平的至少一个峰值保持电路或用于平滑重放信号的低通滤波器，以及比较器，用于比较通过峰值保持电路获得的输出或通过低电平带有参考电压的滤波器。

6. 发明授权

US4924447A Optical memory device for recording, reproducing or erasing information onto a recording medium, including a recorded region detecting circuit. 失效
标题翻译：用于在包括记录区域检测电路的记录介质上记录，再现或擦除信息的光学存储装置。
公开(公告)号：US4924447A
公开(公告)日：1990-05-08
申请号：US12087
申请日：1987-02-06
申请人： Hiroshi Fuji , Shigemi Maeda , Noriaki Sakamoto , Shigeo Terashima , Takeshi Yamaguchi , Kentaro Tsuji , Kunio Kojima
发明人： Hiroshi Fuji , Shigemi Maeda , Noriaki Sakamoto , Shigeo Terashima , Takeshi Yamaguchi , Kentaro Tsuji , Kunio Kojima
IPC分类号： G11B7/004 , G11B11/105 , G11B27/30
CPC分类号： G11B11/10504 , G11B11/10515 , G11B11/10517 , G11B11/10597 , G11B27/30 , G11B7/004
摘要： An optical memory device for recording, reproducing or erasing information by applying an optical beam such as a laser beam onto a recording medium in which the optical memory device includes a recorded region detecting circuit for detecting information recorded in a specified region formed in the recording medium. The optical memory device also includes a timing control for recording, reproducing or erasing data with the use of one result obtained through detection of a synchronizing signal such as a sector mark indicative of a starting point of an information block and another result obtained through detection in the recorded region detecting circuit. The recorded region detecting circuit contains either of at least one peak hold circuit for detecting a peak level of the playback signal and a low pass filter for smoothing the playback signal, and a comparator for comparing an output obtained through the peak hold circuit or through the low pass filter with a reference voltage.
摘要翻译：一种用于通过将诸如激光束的光束施加到记录介质上来记录，再现或擦除信息的光学存储器件，其中光学存储器件包括用于检测记录在记录介质中形成的指定区域中的信息的记录区域检测电路。光学存储装置还包括一个定时控制，用于通过使用通过检测同步信号获得的一个结果来记录，再现或擦除数据，所述同步信号例如是指示信息块起始点的扇区标记，以及通过检测获得的另一结果记录区域检测电路。记录区域检测电路包括用于检测重放信号的峰值电平的至少一个峰值保持电路和用于平滑重放信号的低通滤波器，以及用于比较通过峰值保持电路获得的输出或通过具有参考电压的低通滤波器。

7. 发明授权

US5432768A Method and device for data management in optical recording medium 失效
标题翻译：光记录媒体数据管理方法及装置
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。

8. 发明授权

US5142521A Recording/reproducing device 失效
标题翻译：记录/再现设备
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。

9. 发明授权

US5048004A Optical recording medium recording and reproducing device 失效
标题翻译：光记录介质记录和再现装置
公开(公告)号：US5048004A
公开(公告)日：1991-09-10
申请号：US340454
申请日：1989-04-19
申请人： Toshihisa Deguchi , Takeshi Yamaguchi , Shigemi Maeda , Takashi Iwaki , Tsuneo Fujiwara , Shigeo Terashima
发明人： Toshihisa Deguchi , Takeshi Yamaguchi , Shigemi Maeda , Takashi Iwaki , Tsuneo Fujiwara , Shigeo Terashima
IPC分类号： G11B20/10 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/0055 , G11B7/013 , G11B20/18 , G11B27/00
CPC分类号： G11B20/1883 , G11B7/0045 , G11B7/013 , G11B2220/20
摘要： A recording and reproducing device providing control data recording area on erasable type optical recording medium wherein control data are recorded thereof, characterized in that there is provided a control data recording area forming device for forming control data recording areas having more than two control recording blocks which in turn have more than one recording unit. The control data can be recorded independently. A control data updating device records new control data in the control data recording blocks which were the ones not previously being updated with control data, thereby allowing this device to minimize damage caused by electrical power failure.

10. 发明授权

US4862443A Sync signal detection apparatus for accurately synchronizing reproduced data 失效
标题翻译：用于准确地同步再生数据的同步信号检测装置
公开(公告)号：US4862443A
公开(公告)日：1989-08-29
申请号：US19707
申请日：1987-02-27
申请人： Kentaroh Tsuji , Shigemi Maeda , Takeshi Yamaguchi , Toshihisa Deguchi , Noriaki Sakamoto , Shigeo Terashima
发明人： Kentaroh Tsuji , Shigemi Maeda , Takeshi Yamaguchi , Toshihisa Deguchi , Noriaki Sakamoto , Shigeo Terashima
IPC分类号： G11B20/10 , G11B20/14 , G11B27/10 , H04L7/08 , H04N5/935
CPC分类号： H04N5/935 , G11B20/1403 , G11B20/1426
摘要： A sync signal detection apparatus is provided wherein a sync signal represents the top of recorded data. The sync signal includes a plurality of marks each having a different pattern from the pattern of any other mark. The apparatus is equipped with a circuit for sequentially detecting the patterns of the individual marks in a reproduction mode. Also, a circuit is provided generating a sync pulse at the top of the data in accordance with the address pattern of the mark after a predetermined number of marks are detected. The apparatus ensures accurate reproduction of the recorded data with a small number of bits and an increase in data reliability.
摘要翻译：提供了同步信号检测装置，其中同步信号表示记录数据的顶部。同步信号包括多个标记，每个标记具有与任何其他标记的图案不同的图案。该装置配备有用于在再现模式中顺序地检测各个标记的图案的电路。此外，提供电路，在检测到预定数量的标记之后，根据标记的地址图案在数据的顶部产生同步脉冲。该装置确保以少量位精确地再现记录的数据并增加数据的可靠性。

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