Patents by Inventor Junya Shiraishi

Junya Shiraishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240312532
    Abstract: A semiconductor memory device includes a memory cell array having a memory cell; a data signal terminal configured to receive data to be written into the memory cell from an exterior of the semiconductor memory device and to output data read from the memory cell to the exterior of the semiconductor memory, and a timing signal terminal configured to receive a timing control signal. An interface circuit includes a first comparator having a first input terminal connected to the data signal terminal, a second input terminal connected to a reference voltage, and an output terminal. A plurality of first inverters are connected in series, an input terminal of a first stage one of the first inverters being connected to the output terminal first of the first comparator.
    Type: Application
    Filed: May 23, 2024
    Publication date: September 19, 2024
    Applicant: Kioxia Corporation
    Inventors: Junya MATSUNO, Kenro KUBOTA, Masato DOME, Kensuke YAMAMOTO, Kei SHIRAISHI, Kazuhiko SATOU, Ryo FUKUDA, Masaru KOYANAGI
  • Publication number: 20240295411
    Abstract: An environment map construction device includes a data processor and an environment map constructing section. The data processor processes one or a plurality of pieces of recognition data outputted from one or a plurality of external environment recognizing section that recognizes an external environment, on the basis of an environment map of a previous time. The environment map constructing section constructs an environment map of a current time with use of the one or the plurality of pieces of recognition data processed by the data processor.
    Type: Application
    Filed: October 1, 2020
    Publication date: September 5, 2024
    Inventors: JUNYA SHIRAISHI, TOSHIYUKI HIROI
  • Patent number: 11070238
    Abstract: Deterioration of convergence performance or operational stability due to an increase in constraint length is suppressed when coefficients are updated, so that decoding performance is improved.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: July 20, 2021
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Junya Shiraishi
  • Patent number: 10978107
    Abstract: An apparatus comprises a photodetector (PD) that irradiates a disk with laser light and outputs a signal based on a reflected light from the disk, a front monitor that outputs a reference signal based on an emitted light of a laser diode, and a data detection processing unit to which an output signal of the PD is input to generate a reproduction signal. The data detection processing unit includes a reproduction signal adaptive equalizer that outputs an equalization signal by adaptive equalization processing based on the PD output signal, and a laser noise adaptive equalizer that outputs the equalization signal by the adaptive equalization processing based on a laser noise signal, and generates the reproduction signal in which the laser noise is reduced on the basis of an arithmetic operation result of the output of the reproduction signal adaptive equalizer and the output of the laser noise adaptive equalizer.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: April 13, 2021
    Assignee: Sony Corporation
    Inventors: Nobuyoshi Kobayashi, Junya Shiraishi
  • Publication number: 20200366319
    Abstract: Deterioration of convergence performance or operational stability due to an increase in constraint length is suppressed when coefficients are updated, so that decoding performance is improved.
    Type: Application
    Filed: October 11, 2018
    Publication date: November 19, 2020
    Inventor: Junya SHIRAISHI
  • Publication number: 20200327906
    Abstract: Provided are an apparatus and a method for generating a reproduction signal with reduced laser noise. There are provided a photodetector (PD) that irradiates a disk with laser light and outputs a signal based on a reflected light from the disk, a front monitor that outputs a reference signal based on an emitted light of a laser diode, and a data detection processing unit to which an output signal of the PD is input to generate a reproduction signal. The data detection processing unit includes a reproduction signal adaptive equalizer that outputs an equalization signal by adaptive equalization processing based on the PD output signal, and a laser noise adaptive equalizer that outputs the equalization signal by the adaptive equalization processing based on a laser noise signal, and generates the reproduction signal in which the laser noise is reduced on the basis of an arithmetic operation result of the output of the reproduction signal adaptive equalizer and the output of the laser noise adaptive equalizer.
    Type: Application
    Filed: May 1, 2017
    Publication date: October 15, 2020
    Applicant: Sony Corporation
    Inventors: Nobuyoshi KOBAYASHI, Junya SHIRAISHI
  • Patent number: 10490222
    Abstract: To obtain a signal quality evaluation value capable of having a high correlation to an error rate and high accuracy for a reproduction signal of high density recording. For the object, an estimated value of a path selection error rate is obtained on the basis of a distribution of a path metric difference between a maximum likelihood path at each time, which is a detection path in maximum likelihood decoding in a PRML decoding system and a second path having a second highest likelihood. Further, an average error bit number in erroneous detection is obtained from a bit difference number between the maximum likelihood path and the second path at the time of path selection of each time in the maximum likelihood decoding. In addition, an estimated bit error rate is obtained from results and an evaluation value according to the estimated bit error rate is generated.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: November 26, 2019
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Junya Shiraishi
  • Publication number: 20190325908
    Abstract: Provided are a device and a method which are capable of performing crosstalk-removed high-quality data reproduction from a high-density recording type optical disc. The device includes a photo detector that outputs a readout signal from a reproduction track of an information recording disc, an adjacent track reproduction binary signal supply unit that outputs a binary signal (binary data) which is a reproduction signal of an adjacent track of the reproduction track, a multi-input adaptive equalizer that includes an equalizer unit that receives the readout signal from the reproduction track and an adjacent track reproduction binary signal and outputs an equalization signal by an adaptive equalization process based on an input signal, and a binarization processing unit that executes a binarization process based on the equalization signal and generates a reproduction signal of the reproduction track.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 24, 2019
    Applicant: SONY CORPORATION
    Inventors: Kimihiro SAITO, Kenji YAMAMOTO, Noriaki NISHI, Junya SHIRAISHI, Nobuyoshi KOBAYASHI
  • Patent number: 10373640
    Abstract: Provided are a device and a method which are capable of performing crosstalk-removed high-quality data reproduction from a high-density recording type optical disc. The device includes a photo detector that outputs a readout signal from a reproduction track of an information recording disc, an adjacent track reproduction binary signal supply unit that outputs a binary signal (binary data) which is a reproduction signal of an adjacent track of the reproduction track, a multi-input adaptive equalizer that includes an equalizer unit that receives the readout signal from the reproduction track and an adjacent track reproduction binary signal and outputs an equalization signal by an adaptive equalization process based on an input signal, and a binarization processing unit that executes a binarization process based on the equalization signal and generates a reproduction signal of the reproduction track.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: August 6, 2019
    Assignee: SONY CORPORATION
    Inventors: Kimihiro Saito, Kenji Yamamoto, Noriaki Nishi, Junya Shiraishi, Nobuyoshi Kobayashi
  • Publication number: 20190172489
    Abstract: To obtain a signal quality evaluation value capable of having a high correlation to an error rate and high accuracy for a reproduction signal of high density recording. For the object, an estimated value of a path selection error rate is obtained on the basis of a distribution of a path metric difference between a maximum likelihood path at each time, which is a detection path in maximum likelihood decoding in a PRML decoding system and a second path having a second highest likelihood. Further, an average error bit number in erroneous detection is obtained from a bit difference number between the maximum likelihood path and the second path at the time of path selection of each time in the maximum likelihood decoding. In addition, an estimated bit error rate is obtained from results and an evaluation value according to the estimated bit error rate is generated.
    Type: Application
    Filed: June 12, 2017
    Publication date: June 6, 2019
    Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Junya SHIRAISHI
  • Publication number: 20180358047
    Abstract: Provided are a device and a method which are capable of performing crosstalk-removed high-quality data reproduction from a high-density recording type optical disc. The device includes a photo detector that outputs a readout signal from a reproduction track of an information recording disc, an adjacent track reproduction binary signal supply unit that outputs a binary signal (binary data) which is a reproduction signal of an adjacent track of the reproduction track, a multi-input adaptive equalizer that includes an equalizer unit that receives the readout signal from the reproduction track and an adjacent track reproduction binary signal and outputs an equalization signal by an adaptive equalization process based on an input signal, and a binarization processing unit that executes a binarization process based on the equalization signal and generates a reproduction signal of the reproduction track.
    Type: Application
    Filed: January 12, 2017
    Publication date: December 13, 2018
    Applicant: SONY CORPORATION
    Inventors: Kimihiro SAITO, Kenji YAMAMOTO, Noriaki NISHI, Junya SHIRAISHI, Nobuyoshi KOBAYASHI
  • Patent number: 10134438
    Abstract: An optical medium reproduction apparatus for optically reproducing an optical medium, including: a detection unit for splitting a cross section of a beam returned from the optical medium into a plurality of regions and for forming respective detection signals; a multiple input adaptive equalizer having a plurality of adaptive equalizer units, wherein the respective detection signals are inputted into the adaptive equalizer units, and the outputs of the adaptive equalizer units are computed to form equalization signals; a binarization unit for binarizing the equalization signals to provide binary data; and an equalization error computing unit for determining an equalization error from equalization target signals provided based on the binary data from the binarization unit and the equalization signals, and providing the adaptive equalizer units with the equalization error as control signals for adaptive equalization.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: November 20, 2018
    Assignee: Sony Corporation
    Inventors: Noriaki Nishi, Kimihiro Saito, Junya Shiraishi, Takashi Nakao, Kenji Yamamoto
  • Patent number: 10014023
    Abstract: Provided is an optical medium reproducing apparatus including: a detection unit that divides a luminous flux into a plurality of regions including a first region and a second region which are different in a position in a radial direction and/or a tangential direction, and combines a plurality of detection signals in correspondence with the amount of light that is incident to each of the plurality of regions with combination patterns which are selected to form signals of a plurality of channels; a multi-input equalizer unit that includes a plurality of equalizer units to which the signals of the plurality of channels are respectively supplied, computes outputs of the plurality of equalizer units, and outputs the resultant value as an equalization signal; and a binarization unit that performs binarization processing with respect to the equalization signal to obtain binary data.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: July 3, 2018
    Assignee: SONY CORPORATION
    Inventors: Noriaki Nishi, Kimihiro Saito, Nobuhiko Ando, Junya Shiraishi, Yutaka Tentaku
  • Patent number: 9990952
    Abstract: There is provided an optical medium reproducing device configured to optically reproduce an optical medium including a plurality of tracks formed, the optical medium reproducing device including: an optical filter configured to receive an incident returned light beam from the optical medium, and to spatially and optically form a plurality of signals having different bands in a tangential direction and a radial direction; an arithmetic unit configured to operate the plurality of first signals formed by the optical filter so as to form a plurality of channels of second signals; and an electrical filter configured to individually receive the second signals, and to perform processing to the second signals so as to acquire a reproduced signal.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: June 5, 2018
    Assignee: Sony Corporation
    Inventors: Noriaki Nishi, Kimihiro Saito, Junya Shiraishi, Nobuhiko Ando
  • Publication number: 20180096703
    Abstract: There is provided an optical medium reproducing device configured to optically reproduce an optical medium including a plurality of tracks formed, the optical medium reproducing device including: an optical filter configured to receive an incident returned light beam from the optical medium, and to spatially and optically form a plurality of signals having different bands in a tangential direction and a radial direction; an arithmetic unit configured to operate the plurality of first signals formed by the optical filter so as to form a plurality of channels of second signals; and an electrical filter configured to individually receive the second signals, and to perform processing to the second signals so as to acquire a reproduced signal.
    Type: Application
    Filed: December 9, 2015
    Publication date: April 5, 2018
    Applicant: Sony Corporation
    Inventors: Noriaki Nishi, Kimihiro Saito, Junya Shiraishi, Nobuhiko Ando
  • Patent number: 9847100
    Abstract: An optical medium reproduction device includes: a detection unit configured to form detection signals of respective channels by dividing a cross-section of a beam returning from the optical medium into a plurality of regions and performing division into at least one channel corresponding to the region at an outer side in a radial direction, at least one channel corresponding to the region that is different in position in a tangential direction, and a channel corresponding to the other regions, and, in a case of forming the detection signals of the channels, form the detection signal of at least one of the channels by weighting and adding a signal in a predetermined region among the plurality of regions; a multi-input equalizer unit configured to include a plurality of equalizer units to which the respective detection signals of the plurality of channels are supplied, and configured to form an equalized signal on the basis of the detection signals of the plurality of channels; and a binarization unit configure
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: December 19, 2017
    Assignee: SONY CORPORATION
    Inventors: Noriaki Nishi, Shiori Tashiro, Nobuhiko Ando, Yutaka Tentaku, Junya Shiraishi, Kimihiro Saito
  • Patent number: 9843389
    Abstract: There is provided an optical medium reproduction device that optically reproduces an optical medium in which a plurality of tracks are provided, the optical medium reproduction device including: a detection unit configured to divide a cross-section of a beam returning from the optical medium into at least one channel corresponding to an outer region in a radial direction, at least one channel corresponding to a region that is different in position in a tangential direction, and a channel corresponding to the other region, and form detection signals of the channels; a multi-input equalizer unit including a plurality of equalizer units to which the detection signals of the plurality of channels are supplied, respectively, the multi-input equalizer unit being configured to calculate outputs of the plurality of equalizer units and output the outputs as an equalized signal in a manner that a phase difference between two of the regions is set to be a predetermined phase difference; and a binarization unit configure
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: December 12, 2017
    Assignee: Sony Corporation
    Inventors: Noriaki Nishi, Kimihiro Saito, Junya Shiraishi
  • Publication number: 20170270957
    Abstract: Provided is an optical medium reproducing apparatus including: a detection unit that divides a luminous flux into a plurality of regions including a first region and a second region which are different in a position in a radial direction and/or a tangential direction, and combines a plurality of detection signals in correspondence with the amount of light that is incident to each of the plurality of regions with combination patterns which are selected to form signals of a plurality of channels; a multi-input equalizer unit that includes a plurality of equalizer units to which the signals of the plurality of channels are respectively supplied, computes outputs of the plurality of equalizer units, and outputs the resultant value as an equalization signal; and a binarization unit that performs binarization processing with respect to the equalization signal to obtain binary data.
    Type: Application
    Filed: November 9, 2015
    Publication date: September 21, 2017
    Applicant: SONY CORPORATION
    Inventors: Noriaki NISHI, Kimihiro SAITO, Nobuhiko ANDO, Junya SHIRAISHI, Yutaka TENTAKU
  • Patent number: 9767837
    Abstract: The present disclosure relates to a reproduction apparatus. The reproduction apparatus may comprise an optical filter and electric filters. The optical filter may be configured to provide electrical signals corresponding to regions of an optical beam returning from an optical medium, the optical beam being incident on the optical filter, the regions of the optical beam corresponding to different bands in a line density direction and/or a track density direction. The electric filters may be configured to provide outputs based, at least in part, on the electrical signals provided by the optical filter, wherein the reproduction apparatus is configured to obtain a reproduced signal by combining the outputs of the electric filters.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: September 19, 2017
    Assignee: Sony Corporation
    Inventors: Noriaki Nishi, Kimihiro Saito, Junya Shiraishi, Yutaka Tentaku, Nobuhiko Ando
  • Patent number: 9672859
    Abstract: The present disclosure relates to a reproduction apparatus. The reproduction apparatus may comprise an optical filter and electric filters. The optical filter may be configured to provide electrical signals corresponding to regions of an optical beam returning from an optical medium, the optical beam being incident on the optical filter, the regions of the optical beam corresponding to different bands in a line density direction and/or a track density direction. The electric filters may be configured to provide outputs based, at least in part, on the electrical signals provided by the optical filter, wherein the reproduction apparatus is configured to obtain a reproduced signal by combining the outputs of the electric filters.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: June 6, 2017
    Assignee: Sony Corporation
    Inventors: Noriaki Nishi, Kimihiro Saito, Junya Shiraishi, Yutaka Tentaku, Nobuhiko Ando