Patents by Inventor Akira Nakagawa
Akira Nakagawa 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).
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Publication number: 20200374522Abstract: Embodiments of this disclosure provide an image coding method and apparatus and an image decoding method and apparatus. The image coding method includes: performing feature extraction on to-be-processed image data by using a convolutional neural network, to generate feature maps of the image data; quantizing the feature maps to generate discrete feature maps; preprocessing the discrete feature maps to generate preprocessed data, an amount of data of the preprocessed data being less than an amount of data of the discrete feature maps; calculating probabilities of to-be-coded data in the discrete feature maps according to the preprocessed data; and performing entropy coding on the to-be-coded data according to the probabilities of the to-be-coded data.Type: ApplicationFiled: April 22, 2020Publication date: November 26, 2020Applicant: Fujitsu LimitedInventors: Jing Zhou, Akira Nakagawa, Sihan Wen, Zhiming Tan
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Publication number: 20200359031Abstract: An information processing device includes: a memory; and a processor coupled to the memory and configured to: determine an angle of intra prediction for a block to be encoded in an image included in a video, and encode the block to be encoded using the angle of intra prediction; generate a bit value indicating an estimation result of the angle using a locally decoded pixel value of an encoded pixel adjacent to the block to be encoded; generate a bit string indicating the angle of intra prediction and generate flag information indicating whether a partial bit value of the bit string matches the bit value indicating an estimation result of the angle; and encode the flag information by a first encoding method and encode a remaining bit value of the bit string by a second encoding method.Type: ApplicationFiled: July 24, 2020Publication date: November 12, 2020Applicant: FUJITSU LIMITEDInventors: Guillaume Denis Christian Barroux, KOHJI YAMADA, Akira NAKAGAWA, Kimihiko KAZUI
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Publication number: 20200209842Abstract: Accuracy of unsupervised anomalous sound detection is improved using a small number of pieces of anomalous sound data. A threshold deciding part (13) calculates an anomaly score for each of a plurality of pieces of anomalous sound data, using a normal model learned with normal sound data and an anomaly model expressing the pieces of anomalous sound data, and decides a minimum value among the anomaly scores as a threshold. A weight updating part (14) updates, using a plurality of pieces of normal sound data, the pieces of anomalous sound data and the threshold, weights of the anomaly model so that all the pieces of anomalous sound data are judged as anomalous, and probability of the pieces of normal sound data being judged as anomalous is minimized.Type: ApplicationFiled: August 24, 2018Publication date: July 2, 2020Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuma KOIZUMI, Yuta KAWACHI, Noboru HARADA, Shoichiro SAITO, Akira NAKAGAWA, Shin MURATA
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Patent number: 10630205Abstract: A resonant inverter includes: an input capacitor; an inverter; a snubber circuit; a transformer having a primary winding connected to an AC end of the inverter; a resonant coil, a resonant capacitor, and a current sensor on the secondary winding side of the transformer; and a control unit, wherein, on the basis of current detected by the current sensor, the control unit controls switching elements so as to perform zero voltage switching at the time of turning-on, at a frequency at which a load including the resonant coil and the resonant capacitor becomes capacitive, and performs power regeneration of energy stored in a snubber capacitor to a DC voltage source.Type: GrantFiled: February 28, 2017Date of Patent: April 21, 2020Assignee: Mitsubishi Electric CorporationInventors: Satoshi Murakami, Ryosuke Kobayashi, Akira Nakagawa, Kimihiko Tanaya, Yusuke Naruse, Yuichi Muramoto
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Patent number: 10522978Abstract: In an ignition plug, since a ground electrode is formed in a thin-rod-shape or a mesh-like shape, sufficiently strong radicals are locally generated by a barrier discharge, an anti-inflammation effect by the electrode is small, and the growth of a flame is hardly hindered. Furthermore, by making the thickness dimension of a second dielectric facing a discharge region uniform, the barrier discharge is spread over the surface of the second dielectric, the generation of the radicals is maintained, and combustibility after ignition is promoted. Furthermore, because an end portion of a high voltage electrode and a ground electrode are disposed to face each other within a combustion chamber, a fuel gas introduced into the combustion chamber is liable to flow into the discharge region, and is easily ignited by the radicals generated due to the discharge.Type: GrantFiled: October 7, 2016Date of Patent: December 31, 2019Assignees: Mitsubishi Electric Corporation, NGK SPARK PLUG CO., LTD.Inventors: Taichiro Tamida, Takahiro Inoue, Takashi Hashimoto, Akira Nakagawa, Tomokazu Sakashita, Takayoshi Nagai, Kimihiko Tanaya, Hiroyuki Kameda, Yuichi Yamada, Kenji Ban
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Patent number: 10518348Abstract: In arc welding, determining a current value to be high in an early stage of the arc period is effective in reducing spatters caused by feeble short circuit in the arc period. In that case, to sharply decrease the voltage that has increased with increase in current, an inductance value of a reactor has to be kept small. However, a small inductance value causes a problem—weakness against disturbance. The present invention provides an arc welding control method that performs arc welding while repeating the short-circuit period and the arc period. According to the method, changing an inductance value relating to welding output in the arc period offers stable arc welding with fewer spatters and insusceptibility to disturbance.Type: GrantFiled: March 20, 2014Date of Patent: December 31, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Noriyuki Matsuoka, Yukinori Hirota, Atsuhiro Kawamoto, Junji Fujiwara, Masaru Kowa, Akira Nakagawa
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Patent number: 10436127Abstract: A change amount per unit time of an engine output command for controlling engine output of an internal combustion engine is calculated as an engine output increasing rate, and a power supply device is controlled so that power corresponding to the calculated engine output increasing rate is supplied to a combustion promoter generation device. The combustion promoter generation device generates a combustion promoter through the power supplied from the power supply device to supply the combustion promoter to a combustion chamber of the internal combustion engine, and a generation amount of the combustion promoter increases as the supplied power increases. In this manner, the generation amount of the combustion promoter is adjusted.Type: GrantFiled: December 3, 2015Date of Patent: October 8, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Inoue, Taichiro Tamida, Takashi Hashimoto, Noboru Wada, Akira Nakagawa, Tomokazu Sakashita, Tetsuya Honda
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Publication number: 20190300984Abstract: The present invention is a method for producing a magnesium alloy is provided, which is characterized by adding 7.8 to 9.2% by weight of Al, 0.20 to 0.80% by weight of Zn, 0.12 to 0.40% by weight of Mn, and an amount Y [ppm] calculated by formulas provided below, of Ni, (1) when the decomposition rate X is lower than 500 mg/cm2/day, Y=48.385 Ln(X)?119.64??(Formula 1) (2) when the decomposition rate X is 500 or higher but lower than 1400 mg/cm2/day, Y=63.818 exp(0.0032X)??(Formula 2) and controlling to have a desired decomposition rate.Type: ApplicationFiled: June 17, 2019Publication date: October 3, 2019Inventors: Yasunobu MATSUMOTO, Akira NAKAGAWA, Masayoshi OGAWA, Naoto SAKAI, Kazunori SHIMIZU
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Publication number: 20190199241Abstract: A resonant inverter includes: an input capacitor; an inverter; a snubber circuit; a transformer having a primary winding connected to an AC end of the inverter; a resonant coil, a resonant capacitor, and a current sensor on the secondary winding side of the transformer; and a control unit, wherein, on the basis of current detected by the current sensor, the control unit controls switching elements so as to perform zero voltage switching at the time of turning-on, at a frequency at which a load including the resonant coil and the resonant capacitor becomes capacitive, and performs power regeneration of energy stored in a snubber capacitor to a DC voltage source.Type: ApplicationFiled: February 28, 2017Publication date: June 27, 2019Applicant: Mitsubishi Electric CorporationInventors: Satoshi MURAKAMI, Ryosuke KOBAYASHI, Akira NAKAGAWA, Kimihiko TANAYA, Yusuke NARUSE, Yuichi MURAMOTO
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Patent number: 10320159Abstract: By grounding a metal first housing, radiation noise generated from the coupling circuit is shielded. Further, by enclosing the first housing in a metal second housing in a manner such that the first housing and the second housing do not come into contact with each other, and grounding the second housing by connecting the second housing to an engine block, radiation noise generated by the capacitive component between the coupling circuit and the first housing is shielded by the second housing. As a result, the influence of this noise on peripheral devices of the high frequency discharge ignition device can be suppressed.Type: GrantFiled: September 21, 2017Date of Patent: June 11, 2019Assignee: Mitsubishi Electric CorporationInventors: Yasuyuki Shimizu, Takaaki Tanaka, Akira Nakagawa
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Publication number: 20190114328Abstract: An apparatus receives, via an input device, query input data including a word or a phrase, and acquires search result set data using the query input data. The apparatus acquires, for a value indicating a strength of a relationship between each impression word included in an impression word group and each word included in the query input data, and extracts the first feature word group according to the value indicating the strength of the relationship with each word, from the impression word group. The apparatus displays the search result set data using the first feature word group as an item.Type: ApplicationFiled: October 11, 2018Publication date: April 18, 2019Applicant: FUJITSU LIMITEDInventors: JUN TAKAHASHI, JUNYA SAITO, Akinori Taguchi, Takuya Kamimura, Kentaro Murase, Seiji Okura, Shinji Kikuchi, Akira NAKAGAWA, Toshiyuki Fukuoka
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Publication number: 20190078520Abstract: A change amount per unit time of an engine output command for controlling engine output of an internal combustion engine is calculated as an engine output increasing rate, and a power supply device is controlled so that power corresponding to the calculated engine output increasing rate is supplied to a combustion promoter generation device. The combustion promoter generation device generates a combustion promoter through the power supplied from the power supply device to supply the combustion promoter to a combustion chamber of the internal combustion engine, and a generation amount of the combustion promoter increases as the supplied power increases. In this manner, the generation amount of the combustion promoter is adjusted.Type: ApplicationFiled: December 3, 2015Publication date: March 14, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro INOUE, Taichiro TAMIDA, Takashi HASHIMOTO, Noboru WADA, Akira NAKAGAWA, Tomokazu SAKASHITA, Tetsuya HONDA
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Publication number: 20180354048Abstract: In a method and device for performing welding, after the welding current reaches a first current value during a short circuit, the feeding of the welding wire is stopped, slowed down, or moved backward. As a result, the opening of a short circuit is urged to reduce the frequency at which welding is unnecessarily interrupted by an overcurrent protection function. This achieves high weld quality such as the absence of welding defects, and high production efficiency.Type: ApplicationFiled: August 21, 2018Publication date: December 13, 2018Inventors: Yoshiaki Tanaka, Kazunori Matsumoto, Kimiya Sato, Akira Nakagawa, Hiroki Yuzawa, Hideki Ihara
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Publication number: 20180301877Abstract: In an ignition plug, since a ground electrode is formed in a thin-rod-shape or a mesh-like shape, sufficiently strong radicals are locally generated by a barrier discharge, an anti-inflammation effect by the electrode is small, and the growth of a flame is hardly hindered. Furthermore, by making the thickness dimension of a second dielectric facing a discharge region uniform, the barrier discharge is spread over the surface of the second dielectric, the generation of the radicals is maintained, and combustibility after ignition is promoted. Furthermore, because an end portion of a high voltage electrode and a ground electrode are disposed to face each other within a combustion chamber, a fuel gas introduced into the combustion chamber is liable to flow into the discharge region, and is easily ignited by the radicals generated due to the discharge.Type: ApplicationFiled: October 7, 2016Publication date: October 18, 2018Applicants: Mitsubishi Electric Corporation, NGK SPARK PLUG CO., LTD.Inventors: Taichiro TAMIDA, Takahiro INOUE, Takashi HASHIMOTO, Akira NAKAGAWA, Tomokazu SAKASHITA, Takayoshi NAGAI, Kimihiko TANAYA, Hiroyuki KAMEDA, Yuichi YAMADA, Kenji BAN
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Publication number: 20180278027Abstract: By grounding a metal first housing, radiation noise generated from the coupling circuit is shielded. Further, by enclosing the first housing in a metal second housing in a manner such that the first housing and the second housing do not come into contact with each other, and grounding the second housing by connecting the second housing to an engine block, radiation noise generated by the capacitive component between the coupling circuit and the first housing is shielded by the second housing. As a result, the influence of this noise on peripheral devices of the high frequency discharge ignition device can be suppressed.Type: ApplicationFiled: September 21, 2017Publication date: September 27, 2018Applicant: Mitsubishi Electric CorporationInventors: Yasuyuki SHIMIZU, Takaaki TANAKA, Akira NAKAGAWA
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Patent number: 10075239Abstract: A reproduction device is configured to receive light emitted based on a plurality of signals having a specific amplitude in a specific color space on which information is superimposed, and to reproduce the information based on the received light. The reproduction device includes: a memory; and a processor coupled to the memory and configured to: generate a plurality of signals in the specific color space from the received light, correct the generated plurality of signals based on the specific amplitude, and acquire the information based on the corrected plurality of signals.Type: GrantFiled: March 17, 2017Date of Patent: September 11, 2018Assignee: FUJITSU LIMITEDInventors: Keizo Kato, Kensuke Kuraki, Ryuta Tanaka, Akira Nakagawa
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Patent number: 10058947Abstract: In a method and device for performing welding, after the welding current reaches a first current value during a short circuit, the feeding of the welding wire is stopped, slowed down, or moved backward. As a result, the opening of a short circuit is urged to reduce the frequency at which welding is unnecessarily interrupted by an overcurrent protection function. This achieves high weld quality such as the absence of welding defects, and high production efficiency.Type: GrantFiled: November 10, 2010Date of Patent: August 28, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yoshiaki Tanaka, Kazunori Matsumoto, Kimiya Sato, Akira Nakagawa, Hiroki Yuzawa, Hideki Ihara
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Patent number: 10051273Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: GrantFiled: December 22, 2017Date of Patent: August 14, 2018Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa
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Patent number: 9973774Abstract: A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.Type: GrantFiled: September 17, 2015Date of Patent: May 15, 2018Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Akira Nakagawa, Kimihiko Kazui, Junpei Koyama
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Patent number: 9973756Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: GrantFiled: March 31, 2017Date of Patent: May 15, 2018Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa