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：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：US4939710A

公开(公告)日：1990-07-03

申请号：US214930

申请日：1988-07-01

申请人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Toshihisa Deguchi ,  Shozou Kobayashi

发明人： Hiroshi Fuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Toshihisa Deguchi ,  Shozou Kobayashi

IPC分类号： G11B11/105

CPC分类号： G11B11/10515 ,  G11B11/10506 ,  G11B11/10597

摘要： An optical magnetic memory device includes an optical magnetic recording medium such as a disc having recording magnetic film at least on one side thereof and initialized in a certain direction in advance, a recording section for recording data in such a manner that data-recorded portions and non-recorded portions are alternately formed, and a reproducing section for reproducing data from the recording medium by detecting the interval between the recorded or non-recorded portions. The reproducing section comprises a detector for detecting positive and negative peaks of signals reproduced from the recorded or non-recorded portion and a selector for selecting either of the detection outputs from the detector according to a control signal.

摘要翻译： 一种光磁存储器件包括：光磁记录介质，例如至少在其一侧具有记录磁膜的光磁记录介质，并且预先沿某个方向初始化;记录部分，用于以数据记录部分和 交替地形成非记录部分，以及再现部分，用于通过检测记录或非记录部分之间的间隔从记录介质再现数据。 再现部分包括检测器，用于检测从记录或非记录部分再现的信号的正峰值和负峰值，以及选择器，用于根据控制信号选择来自检测器的检测输出。

公开(公告)号：US4788674A

公开(公告)日：1988-11-29

申请号：US902593

申请日：1986-09-02

申请人： Shigemi Maeda ,  Toshihisa Deguchi ,  Takeshi Yamaguchi ,  Shozou Kobayashi

发明人： Shigemi Maeda ,  Toshihisa Deguchi ,  Takeshi Yamaguchi ,  Shozou Kobayashi

IPC分类号： G11B7/005 ,  G11B7/125 ,  G11B11/105 ,  G11B27/36 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10597 ,  G11B27/36 ,  G11B7/005

摘要： An optical disc apparatus provided with a recording correcting system for controlling variations in the recorded bit length. The recording correcting system may be controlled not only while the apparatus is put to work, but also during unoccupied times when the recording, reproducing, and erasing operations are not required from a higher level apparatus. Also, the controlling operation may be performed so that the value of the record correction may be renewed at proper time intervals. The repetition of the correction trial at the proper interval allows a time lapse after the apparatus power-supply is put to work to occur with no undesirable effects and the characteristic variation between respective discs during the disc exchange can be coped with.

摘要翻译： 一种具有记录校正系统的光盘装置，用于控制记录位长度的变化。 记录校正系统不仅可以在设备工作时被控制，而且可以在不需要较高级设备的记录，再现和擦除操作的空闲时间期间被控制。 此外，可以执行控制操作，使得可以以适当的时间间隔更新记录校正的值。 以适当的间隔重复校正试验允许在设备供电工作发生之后发生不期望的影响的时间流逝，并且可以应对在盘更换期间各个盘之间的特性变化。

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：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.

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：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：US5365501A

公开(公告)日：1994-11-15

申请号：US853863

申请日：1992-03-20

申请人： Hiroshi Fuji ,  Takeshi Yamaguchi ,  Toshihisa Deguchi

发明人： Hiroshi Fuji ,  Takeshi Yamaguchi ,  Toshihisa Deguchi

IPC分类号： G11B11/10 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0055 ,  G11B11/105 ,  G11B20/10 ,  G11B27/19 ,  G11B27/30 ,  G11B17/32

CPC分类号： G11B11/1053 ,  G11B11/10597 ,  G11B20/10 ,  G11B27/19 ,  G11B27/3027 ,  G11B7/004

摘要： An information recording and reproducing device records, erases and reproduces information on and from a memory device. The memory device has pre-format sections. The information recording and reproducing device includes a pre-recorded area detection circuit for detecting a pre-recorded area having information predeterminately recorded and located on the memory device and timing control circuits for providing timing control of an information recording, erasing or reproducing operation according to a pre-recorded area detecting signal released from the pre-recorded area detection circuit, thereby enabling each timing of recording, reproducing, or erasing operation is accurately determined. The timing control may be performed according to both of the pre-recorded area detecting signal of the present invention and the conventional synchronization detection signal. In that case, if an error should occur in the synchronization detection signals, since the pre-recorded area detecting signal is released every time pre-recorded information for a sector mark or the like is reproduced, an accurate timing control without time lag is achieved according to the pre-recorded area detecting signals.

摘要翻译： 信息记录和再现设备在存储设备上记录，擦除和再现信息。 存储器设备具有预格式化部分。 信息记录和再现装置包括一个预先记录的区域检测电路，用于检测具有预先记录和定位在存储装置上的信息的预先记录的区域和定时控制电路，用于提供根据以下的信息记录，擦除或再现操作的定时控制 从预记录区域检测电路释放的预先记录区域检测信号，从而能够准确地确定记录，再现或擦除操作的每个定时。 可以根据本发明的预先记录的区域检测信号和传统的同步检测信号来执行定时控制。 在这种情况下，如果在同步检测信号中发生错误，则由于每当再现用于扇区标记等的预先记录的信息被再现时，预先记录的区域检测信号被释放，所以实现了没有时间延迟的准确的定时控制 根据预先记录的区域检测信号。