公开(公告)号：US5005164A

公开(公告)日：1991-04-02

申请号：US186580

申请日：1988-04-27

申请人： Noriaki Sakamoto ,  Shigemi Maeda ,  Toshihiro Yamanaka ,  Toshihisa Deguchi ,  Nobuyuki Horie ,  Takeshi Yamaguchi ,  Kunio Kojima

发明人： Noriaki Sakamoto ,  Shigemi Maeda ,  Toshihiro Yamanaka ,  Toshihisa Deguchi ,  Nobuyuki Horie ,  Takeshi Yamaguchi ,  Kunio Kojima

IPC分类号： G11B7/004 ,  G11B7/125 ,  G11B11/105 ,  G11B19/02

CPC分类号： G11B7/126 ,  G11B11/10597 ,  G11B19/02 ,  G11B7/004

摘要： A recording and reproducing apparatus is provided which includes a recording condition control device for controlling recording conditions during recording of a binary-coded original recording signal on a recording medium, a signal recording device for recording the original recording signal onto the recording medium according to recording conditions set by the recording condition control device, a reproducing signal output device for outputting binary-coded reproducing signals by detecting the recording signal as recorded on the recording medium by the signal recording device, and a recording condition setting device for obtaining the recording conditions to provide a reproducing signal approximately equal to the original recording signal through a comparison between the reproducing signal outputted from the reproducing signal output device and the original recording signal.

公开(公告)号：US4920528A

公开(公告)日：1990-04-24

申请号：US16258

申请日：1987-02-19

申请人： Noriaki Sakamoto ,  Yoshiki Nishioka ,  Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Shigemi Maeda

发明人： Noriaki Sakamoto ,  Yoshiki Nishioka ,  Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Shigemi Maeda

IPC分类号： G11B20/18

CPC分类号： G11B20/1883 ,  G11B2220/20

摘要： A disk recording method in which recording is performed on a disklike recording medium having a radially coaxial or spiral recording track that is divided into a predetermined plural number of recording sectors each acting as a recording unit. A predetermined number of dedicated sectors are provided at a rear portion of the recording track so that the contents that are recorded in defective sectors of the recording sectors are alternatively assigned to the dedicated sectors.

摘要翻译： 一种盘记录方法，其中在具有径向同轴或螺旋记录轨道的盘状记录介质上执行记录，所述盘状记录介质被分成预定的多个作为记录单元的记录扇区。 预定数量的专用扇区设置在记录轨道的后部，使得记录在记录扇区的缺陷扇区中的内容交替地分配给专用扇区。

公开(公告)号：US4958337A

公开(公告)日：1990-09-18

申请号：US344530

申请日：1989-04-28

申请人： Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Takeshi Yamaguchi ,  Shigemi Maeda ,  Yoshiki Nishioka ,  Teruki Sugiura

发明人： Toshihiro Yamanaka ,  Nobuyuki Horie ,  Shozou Kobayashi ,  Toshihisa Deguchi ,  Takeshi Yamaguchi ,  Shigemi Maeda ,  Yoshiki Nishioka ,  Teruki Sugiura

IPC分类号： G11B5/016 ,  G11B20/18

CPC分类号： G11B20/1816 ,  G11B5/016

摘要： A disk recording checking method in which recording is performed on a disk having radially different recording tracks each divided circumferentially into a plurality of sectors. The method employs a continuous writing device for continuously writing data onto a predetermined number of the sectors, and a continuous checking device for checking the data, while continuously reading the data from the predetermined number of the sectors. The method utilized checks both the number of errors in each code sequence and the total number of errors in each sector to determine if the data in the sector is valid.

摘要翻译： 一种磁盘记录检查方法，其中在具有径向不同的记录磁道的磁盘上执行记录，每个记录磁道分别沿周向分成多个扇区。 该方法采用连续写入装置，用于将数据连续地写入预定数量的扇区;以及连续检查装置，用于在从预定数量的扇区连续读取数据的同时检查数据。 所使用的方法检查每个代码序列中的错误数量和每个扇区中的错误总数，以确定扇区中的数据是否有效。

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：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：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。

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.

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。

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。