Patents by Inventor Hirofumi Aoki

Hirofumi Aoki 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: 20200296372
    Abstract: To provide a data encoding system that can control compression parameters when compressing sensing data in a flying object without setting a compression method in advance. The data encoding control device installed in a ground station detects a position on earth sensed by the sensor, determines information about a compression parameter of sensing data acquired through sensing performed by the sensor, based on the detected position, and notifies, to the data encoding device, the information about the determined compression parameter. The data encoding device acquires the information about compression parameter notified from the data encoding control device, and compresses sensing data acquired through sensing performed by the sensor, according to the acquired information about the compression parameter.
    Type: Application
    Filed: March 14, 2017
    Publication date: September 17, 2020
    Applicant: NEC Corporation
    Inventor: Hirofumi AOKI
  • Patent number: 10771790
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: September 8, 2020
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Publication number: 20200265562
    Abstract: An image processing device which is capable of accurately detect pixels covered by cloud shadows and remove effects of the cloud shadows in an images are provided. The device includes: a cloud transmittance calculation unit that calculates transmittance of the one or more clouds in an input image, for each pixel; a cloud height estimation unit that determines estimation of a height from the ground to each cloud in the input image to detect position of corresponding one or more shadows; an attenuation factor estimation unit that calculates attenuation factors for the direct sun irradiance by applying an averaging filter to the cloud transmittance calculated; and a shadow removal unit that corrects pixels affected by the one or more shadows, based on a physical model of a cloud shadow formation by employing the attenuation factors calculated and the position, and outputs an image which includes the pixels corrected.
    Type: Application
    Filed: September 8, 2017
    Publication date: August 20, 2020
    Applicant: NEC Corporation
    Inventors: Madhuri Mahendra NAGARE, Hirofumi AOKI, Kazutoshi SAGI
  • Patent number: 10742991
    Abstract: A video encoding device includes: transform means 11 for transforming an image block; entropy encoding means 12 for entropy-encoding transformed data of the image block transformed by the transform means 11; PCM encoding means 13 for PCM-encoding the image block; multiplex data selection means 14 for selecting output data of the entropy encoding means 12 or the PCM encoding means 13, in a block of a block size set from the outside; and multiplexing means 15 for embedding a PCM header in a bitstream, in the block of the set from the outside block size.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: August 11, 2020
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Junji Tajime, Hirofumi Aoki, Kenta Senzaki
  • Patent number: 10728579
    Abstract: A video decoding device includes a demultiplexer which demultiplexes Supplemental-Enhancement-Information having information indicating segments where a refresh has completed in a current picture, the segments including an intra-encoded-segment in the current picture, and a video bitstream including video data of an encoded slice; an extractor which extracts the information from a message which is part of the demultiplexed Supplemental-Enhancement-Information; and a video decoder which decodes image data from the demultiplexed video bitstream.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: July 28, 2020
    Assignee: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Masato Tsukada
  • Patent number: 10667430
    Abstract: Provided is a vapor chamber that is extremely thin but nonetheless allows a working fluid to smoothly flow back, prevents dry-out and provides a superior heat transport capability, regardless of an installation orientation such as a top heat orientation or a change in the installation orientation.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: May 26, 2020
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu Inagaki, Kenya Kawabata, Hirofumi Aoki
  • Publication number: 20200083330
    Abstract: A method for producing a SiC epitaxial wafer according to the present embodiment includes: an epitaxial growth step of growing the epitaxial layer on the SiC single crystal substrate by feeding an Si-based raw material gas, a C-based raw material gas, and a gas including a Cl element to a surface of a SiC single crystal substrate, in which the epitaxial growth step is performed under growth conditions that a film deposition pressure is 30 torr or less, a Cl/Si ratio is in a range of 8 to 12, a C/Si ratio is in a range of 0.8 to 1.2, and a growth rate is 50 ?m/h or more from an initial growth stage.
    Type: Application
    Filed: April 19, 2018
    Publication date: March 12, 2020
    Applicants: SHOWA DENKO K.K., Central Research Institute of Electric Power Industry, DENSO CORPORATION
    Inventors: Keisuke FUKADA, Naoto ISHIBASHI, Akira BANDO, Masahiko ITO, Isaho KAMATA, Hidekazu TSUCHIDA, Kazukuni HARA, Masami NAITO, Hideyuki UEHIGASHI, Hiroaki FUJIBAYASHI, Hirofumi AOKI, Toshikazu SUGIURA, Katsumi SUZUKI
  • Publication number: 20200065946
    Abstract: An image processing device which is capable of accurately detects and corrects areas affected by clouds even if multiple types or layers of clouds present in images, is disclosed.
    Type: Application
    Filed: December 20, 2016
    Publication date: February 27, 2020
    Applicant: NEC Corporation
    Inventors: Madhuri Mahendra NAGARE, Eiji KANEKO, Hirofumi AOKI
  • Publication number: 20200041215
    Abstract: Provided is a heat pipe which is installed in a cold region in a bottom heat posture in which a longitudinal direction of a container is substantially in parallel with a gravitational direction, is capable of preventing the container from deforming even when a working fluid has become frozen, and has excellent heat transport properties.
    Type: Application
    Filed: October 11, 2019
    Publication date: February 6, 2020
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu INAGAKI, Hirofumi AOKI, Kazuya TAKAHASHI, Shinichi ITO, Shuta HIKICHI
  • Publication number: 20200025459
    Abstract: There is provided a flat heat pipe that is not easily deformed in spite of a reduction in thickness and can maintain high heat transport capacity. A flat heat pipe 100 includes a container 130 in which a cavity 130S is formed by plates 110 (110a, 110b) made of metal and disposed substantially in parallel with each other, working fluid that is enclosed in the cavity 130S, and a wick structure 150 that is inserted into the container. The wick structure 150 includes a first sheet-like member 140, and hollow protruding portions 170 protruding in a height direction of the container 130 are formed on the first sheet-like member 140.
    Type: Application
    Filed: September 18, 2019
    Publication date: January 23, 2020
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tomoaki TORATANI, Yoshinori NAKAMURA, Yoshikatsu INAGAKI, Hirofumi AOKI
  • Publication number: 20200025460
    Abstract: The present disclosure is related to providing a heat sink that exhibits an excellent cooling performance by preventing occurrence of a hot spot on a heat pipe. A heat sink comprising: a heat receiving plate to which a heating element is thermally connected; and a heat pipe thermally connected to the heat receiving plate, wherein a thermal conductivity of the heat receiving plate is higher than a thermal conductivity of a material of a container of the heat pipe.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 23, 2020
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi AOKI, Yoshikatsu INAGAKI, Kenya KAWABATA, Hiroshi OKADA, Daiki TAKEMURA
  • Patent number: 10518782
    Abstract: To provide an operation start index value calculating unit for calculating index values of operation start times according to operation contents of a driver who drives a vehicle, and a driving characteristics estimating unit for determining ratios of probability densities to total value thereof in respective probability density functions in the calculated index values, based on the respective probability density functions of every state of the operation start times to the index values of the operation start times and on the index values of the operation start times calculated by the operation start index value calculating unit, and for estimating the driving characteristics of the driver by weighting the ratios to the total values of the respective probability densities.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: December 31, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirofumi Aoki
  • Patent number: 10511862
    Abstract: A video encoder 101 encodes image data of an input moving image based on prediction and generates a video bitstream of encoded pictures. A refresh controller 102 refreshes such that a partial area in the picture is assumed as a unit area to be refreshed and the unit area to be refreshed is moved on a picture-by-picture basis. A display-enabled area encoder 103 encodes a display-enabled area for each picture and generating a display-enabled area information bitstream in refreshing. A multiplexer 104 multiplexes the video bitstream and the display-enabled area information bitstream.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: December 17, 2019
    Assignee: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Masato Tsukada
  • Publication number: 20190376206
    Abstract: This SiC epitaxial wafer includes: a SiC single crystal substrate of which a main surface has an off-angle of 0.4° to 5° with respect to (0001) plane; and an epitaxial layer provided on the SiC single crystal substrate, wherein the epitaxial layer has a basal plane dislocation density of 0.1 pieces/cm2 or less that is a density of basal plane dislocations extending from the SiC single crystal substrate to an outer surface and an intrinsic 3C triangular defect density of 0.1 pieces/cm2 or less.
    Type: Application
    Filed: December 25, 2017
    Publication date: December 12, 2019
    Applicants: SHOWA DENKO K.K, Central Research Institute of Electric Power Industry, DENSO CORPORATION
    Inventors: Keisuke FUKADA, Naoto ISHIBASHI, Akira BANDO, Masahiko ITO, Isaho KAMATA, Hidekazu TSUCHIDA, Kazukuni HARA, Masami NAITO, Hideyuki UEHIGASHI, Hiroaki FUJIBAYASHI, Hirofumi AOKI, Toshikazu SUGIURA, Katsumi SUZUKI
  • Publication number: 20190360762
    Abstract: A vapor chamber excellent in productivity, reduction of a number of components, and capable of preventing reduction in area of a cavity section while reducing a space of an outer periphery of the cavity section in which a working fluid is sealed is provided. An example vapor chamber has a container in which a cavity section is formed by stacked plate-shaped members, a working fluid that is sealed in the cavity section, and a wick structure accommodated in the cavity section.
    Type: Application
    Filed: July 24, 2019
    Publication date: November 28, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi AOKI, Yoshikatsu INAGAKI, Hiroshi SAKAI
  • Publication number: 20190360760
    Abstract: To provide a vapor chamber with which distortion of a container is reduced regardless of the kind of the material of the container and generation of pin-holes in a melted part of the container is prevented. The vapor chamber includes a container having a hollow cavity part, the container being formed by laminating one tabular member and another tabular member facing the one tabular member; a working fluid enclosed in the cavity part; and a wick structure provided in the cavity part. An outer peripheral part of the cavity part is sealed by welding. A melted part formed by the welding runs through the one tabular member, while the melted part does not run through the other tabular member.
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi AOKI, Yoshikatsu INAGAKI
  • Publication number: 20190327493
    Abstract: A video decoding device includes a demultiplexer which demultiplexes Supplemental-Enhancement-Information having information indicating segments where a refresh has completed in a current picture, the segments including an intra-encoded-segment in the current picture, and a video bitstream including video data of an encoded slice; an extractor which extracts the information from a message which is part of the demultiplexed Supplemental-Enhancement-Information; and a video decoder which decodes image data from the demultiplexed video bitstream.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 24, 2019
    Inventors: Hirofumi AOKI, Keiichi CHONO, Masato TSUKADA
  • Patent number: 10432934
    Abstract: A video encoding device includes: a quantization step size encoding unit 11 for encoding a quantization step size for controlling quantization granularity; and a quantization step size downsampling unit 12 for downsampling one or more encoded quantization step sizes to generate a quantization step size representative value. The quantization step size encoding unit 11 predicts the quantization step size using the quantization step size representative value.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: October 1, 2019
    Assignee: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda
  • Publication number: 20190281729
    Abstract: An object of the present disclosure is to provide a heat radiation member which excels in the cooling performance for a heat generator mounted in a thin casing and the thermal diffusion performance from the heat generator. A vapor chamber to be attached inside a casing includes: a flat plate-like container having a cavity portion; a wick structure provided to the cavity portion; a working fluid sealed in the cavity portion; and a resin attachment member, provided on the container, for attachment into the casing.
    Type: Application
    Filed: May 29, 2019
    Publication date: September 12, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshikatsu INAGAKI, Hirofumi AOKI
  • Publication number: 20190230366
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Application
    Filed: April 1, 2019
    Publication date: July 25, 2019
    Applicant: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki