Patents Assigned to National Institute of Information and Communications Technology
  • Patent number: 11049493
    Abstract: [Problem] With conventional technology, it is impossible to appropriately support spoken dialog that is carried out in multiple languages.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: June 29, 2021
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Atsuo Hiroe, Takuma Okamoto
  • Publication number: 20210167855
    Abstract: [Problem] To provide a novel optical network which can be used as an in-vehicle optical backbone network and exhibits high capacity, low delay, low power consumption, low noise and low cost.
    Type: Application
    Filed: June 3, 2019
    Publication date: June 3, 2021
    Applicant: National Institute of Information and Communications Technology
    Inventors: Ryo TAKAHASHI, Tetsuya KAWANISHI, Naokatsu YAMAMOTO
  • Patent number: 11024286
    Abstract: In order to solve a conventional problem that, after a series of dialog between a user and a spoken dialog device has progressed to some extent, that user or another user cannot see or recognize a previous dialog status, a cross-lingual spoken dialog system is provided wherein, in a case in which an instruction from a user terminal is received by a pairing server, dialog information stored in a storage medium is transmitted to the user terminal. Accordingly, even after a series of dialog between a user and the spoken dialog device has progressed to some extent, that user or another user can see or recognize a previous dialog status.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: June 1, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventors: Atsuo Hiroe, Takuma Okamoto, Yutaka Kidawara
  • Publication number: 20210120558
    Abstract: A communications network system includes a control unit, one or more wireless systems, and application equipment. The control unit acquires information about data that the application equipment communicates via the wireless systems, and acquires information about a wireless environment that has an impact on communications by the wireless systems. The control unit generates a plurality of communications policies that are delivered to the wireless systems, and manages the communications policies that are executed on the wireless systems. The wireless systems store the plurality of communications policies delivered from the control unit, and detect the status of communications, change the communications policies based on the detection result, and control information about data that the application equipment communicates via the wireless systems.
    Type: Application
    Filed: March 8, 2019
    Publication date: April 22, 2021
    Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Kenichi MARUHASHI, Satoko ITAYA, Fumihide KOJIMA
  • Patent number: 10963646
    Abstract: A scenario passage pair recognizer includes: a text passage searching unit searching a set of text passages each including no more than a certain number of sentences of a document, and within which all noun phrases included in a scenario candidate co-occur; a feature extracting unit extracting a feature from each combination of the scenario candidate and each searched support passage; a classifier outputting a score indicating reliability of the scenario candidate based on the support passage as a source of the feature; and a score accumulating unit and a maximum value selecting unit, accumulating the scores output from the classifier and selecting the maximum value as the reliability of the scenario candidate. The scenario classifier determines plausibility of the scenario candidate as a causality based on the feature including the score output from the scenario passage pair recognizer.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: March 30, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventors: Kazuaki Inada, Chikara Hashimoto, Kentaro Torisawa
  • Patent number: 10957303
    Abstract: A training apparatus includes an autoregressive model configured to estimate a current signal from a past signal sequence and a current context label, a vocal tract feature analyzer configured to analyze an input speech signal to determine a vocal tract filter coefficient representing a vocal tract feature, a residual signal generator configured to output a residual signal, a quantization unit configured to quantize the residual signal output from the residual signal generator to generate a quantized residual signal, and a training controller configured to provide as a condition, a context label of an already known input text for the input speech signal corresponding to the already known input text to the autoregressive model and to train the autoregressive model by bringing a past sequence of the quantized residual signals for the input speech signal and the current context label into correspondence with a current signal of the quantized residual signal.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 23, 2021
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Kentaro Tachibana, Tomoki Toda
  • Patent number: 10945223
    Abstract: The time of transmission and reception between stations A and B is exchanged, and any deviation in time is calculated in a corresponding manner in the stations.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: March 9, 2021
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Nobuyasu Shiga, Masugi Inoue, Satoshi Yasuda, Kohta Kido
  • Patent number: 10944481
    Abstract: To realize sampling (signal measurement) and analysis of a signal to be measured easily at low cost by capturing optical phase fluctuation even when low-speed sampling is carried out.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: March 9, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventor: Takahide Sakamoto
  • Patent number: 10936664
    Abstract: A dialogue system includes: a question generating unit receiving an input sentence from a user and generating a question using an expression included in the input sentence, by using a dependency relation; an answer obtaining unit inputting the question generated by the question generating unit to a question-answering system and obtaining an answer to the question from question-answering system; and an utterance generating unit for generating an output sentence to the input sentence, based on the answer obtained by the answer obtaining unit.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 2, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventors: Noriyuki Abe, Kanako Onishi, Kentaro Torisawa, Canasai Kruengkrai, Jonghoon Oh, Ryu Iida, Yutaka Kidawara
  • Publication number: 20210032228
    Abstract: The present invention provides an electro-optic polymer (EO polymer) comprising an electro-optic molecule (EO molecule) and a base polymer. The EO polymer of the present invention has good performance over the entire optical communication wavelength range and therefore can preferably be used for the production of optical modulators, optical switches, optical transceivers, optical phased arrays, LiDAR (light detection and ranging) devices, electric field sensors, terahertz wave generators and detectors, etc.
    Type: Application
    Filed: January 30, 2019
    Publication date: February 4, 2021
    Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Akira OTOMO, Isao AOKI, Toshiki YAMADA, Chiyumi YAMADA
  • Patent number: 10909976
    Abstract: A speech recognition device includes: an acoustic model based on an End-to-End neural network responsive to an observed sequence formed of prescribed acoustic features obtained from a speech signal by feature extracting unit, for calculating probability of the observed sequence being a certain symbol sequence; and a decoder responsive to a symbol sequence candidate, for decoding a speech signal by a WFST based on a posterior probability of each of word sequences corresponding to the symbol sequence candidate, probabilities calculated by the acoustic model for symbol sequences selected based on an observed sequence, and a posterior probability of each of the plurality of symbol sequences.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: February 2, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventor: Naoyuki Kanda
  • Patent number: 10911153
    Abstract: To provide a photodetector which enables reception of massively parallel optical communication, and with which a large volume of data for multi-mode transmission or multi-core transmission can be received instantaneously at once. A photodetector comprising a two-dimensional photodetector array in which a plurality of photodetectors 9 are arranged in a two-dimensional array, and which includes a wire 12 having a width of not more than 4 ?m between the plurality of photodetectors. Each of the photodetectors has a light reception area with a side measuring not more than 100 ?m. The plurality of photodetectors arranged in a two-dimensional array are spaced apart from each other by not less than 20 ?m.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: February 2, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventors: Toshimasa Umezawa, Takahide Sakamoto, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
  • Publication number: 20210026221
    Abstract: The present disclosure provides a method for producing a laminate for non-linear optics.
    Type: Application
    Filed: August 23, 2018
    Publication date: January 28, 2021
    Applicant: National Institute of Information and Communications Technology
    Inventors: Takahiro KAJI, Yukihiro TOMINARI, Toshiki YAMADA, Akira OTOMO
  • Patent number: 10892644
    Abstract: To provide a power supply system to a two-dimensional communication sheet that can prevent generation of leakage power without lowering a power efficiency, there are included a two-dimensional communication sheet 1 that has an dielectric layer 11, a first conductor layer 12 covering a rear surface of the dielectric layer 11, and a second conductor layer 13 covering a front surface of the dielectric layer 11 and composed of a mesh-shaped wiring pattern; and a power supply port 16 for supplying power to the two-dimensional communication sheet 1, the power supply port 16 having a first power supply plate 163 provided separately at a rear side of the first conductor layer 12, a second power supply plate 164 provided at a position opposite to the first power supply plate 163 separately at a front side of the second conductor layer 13, a first power supply body 161 electrically connected with the first power supply plate 163, and a second power supply body 162 electrically connected with the second power supply pla
    Type: Grant
    Filed: August 6, 2017
    Date of Patent: January 12, 2021
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Bing Zhang, Takashi Matsuda, Toshinori Kagawa, Ryu Miura
  • Publication number: 20200407498
    Abstract: The purpose of the present invention is to provide: a novel polymer which has an electro-optical effect; a method for producing such a polymer; and a light control element which uses such a polymer. The present invention relates to a non-crosslinkable polycarbonate which contains a moiety that has electro-optical characteristics. The present invention also relates to a method for producing a polycarbonate, which comprises a step for reacting a bisphenol compound, a diol compound that has electro-optical characteristics, and a phosgene in the presence of an acid binding agent and solvent. The present invention also relates to a light control element which comprises such polycarbonate.
    Type: Application
    Filed: March 1, 2019
    Publication date: December 31, 2020
    Applicants: TEIJIN LIMITED, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Naoshi TAKAHASHI, Katsuhiro YAMANAKA, Akira OTOMO, Toshiki YAMADA
  • Patent number: 10861945
    Abstract: A semiconductor element includes a high-resistivity substrate that includes a ?-Ga2O3-based single crystal including an acceptor impurity, a buffer layer on the high-resistivity substrate, the buffer layer including a ?-Ga2O3-based single crystal, and a channel layer on the buffer layer, the channel layer including a ?-Ga2O3-based single crystal including a donor impurity. A crystalline laminate structure includes a high-resistivity substrate that includes a ?-Ga2O3-based single crystal including an acceptor impurity, a buffer layer on the high-resistivity substrate, the buffer layer including a ?-Ga2O3-based single crystal, and a donor impurity-containing layer on the buffer layer, the donor impurity-containing layer including a ?-Ga2O3-based single crystal including a donor impurity.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: December 8, 2020
    Assignees: TAMURA CORPORATION, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY
    Inventors: Kohei Sasaki, Ken Goto, Masataka Higashiwaki, Man Hoi Wong, Akinori Koukitu, Yoshinao Kumagai, Hisashi Murakami
  • Patent number: 10845402
    Abstract: An electromagnetic field imaging device according to one aspect of the present disclosure includes a polarizing optical member arranged to face an imaging subject. A modulated light from a laser light source is influenced by an electric field from the imaging subject in the polarizing optical member. The modulated light subjected to the influence of the electric field is imaged as a detection light. The polarizing optical member is supported in a state of being movable in a direction of a plate thickness of the polarizing optical member. The plate thickness of the polarizing optical member is no larger than 1.2 times a minimum void interval of a wiring of the imaging subject.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: November 24, 2020
    Assignee: National Institute of Information and Communications Technology
    Inventors: Shinji Fukui, Muneo Yorinaga, Masahiro Tsuchiya
  • Patent number: 10825935
    Abstract: A trench MOS-type Schottky diode includes a first semiconductor layer including a Ga2O3-based single crystal, a second semiconductor layer that is a layer laminated on the first semiconductor layer and that includes a Ga2O3-based single crystal and a trench opened on a surface thereof opposite to the first semiconductor layer, an anode electrode formed on the surface of the second semiconductor layer opposite to the first semiconductor layer, a cathode electrode formed on a surface of the first semiconductor layer opposite to the second semiconductor layer, an insulating film covering the inner surface of the trench of the second semiconductor layer, and a trench MOS gate that is embedded in the trench of the second semiconductor layer so as to be covered with the insulating film and is in contact with the anode electrode.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: November 3, 2020
    Assignees: TAMURA CORPORATION, National Institute of Information and Communications Technology
    Inventors: Kohei Sasaki, Masataka Higashiwaki
  • Patent number: 10819429
    Abstract: A free-space optical communication apparatus, transmitting and receiving light waves to and from an artificial satellite orbiting an earth orbit, includes a transmission light wave generating unit generating a transmission light wave to be transmitted to the artificial satellite, a telescope having an aperture for collecting a reception light wave emitted from the artificial satellite, the aperture adapted to collect a path propagation light propagating through a space including a propagation path for correcting an uplink transmission light wavefront generated by the transmission light wave generating unit to the artificial satellite, a wavefront sensor detecting wavefront distortions of the reception light wave and the uplink propagation path, a control unit generating a control signal based on the wavefront distortions, and a deformable mirror correcting the uplink propagation path based on the control signal to guide the transmission light wave to the artificial satellite through the telescope.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: October 27, 2020
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Dimitar Kolev, Morio Toyoshima
  • Patent number: 10811577
    Abstract: The semiconductor light emitting element is a semiconductor light emitting element comprising a semiconductor layer including a light emitting layer, wherein a surface of the semiconductor light emitting element includes a light extraction surface. At least one of the light extraction surface and an interface between two layers having different refractive indexes in the semiconductor light emitting element is provided with a periodic recessed and projecting structure having a period that exceeds 0.5 times as great as a wavelength of light emitted from the light emitting layer, and a minute recessed and projecting structure located on a surface of the periodic recessed and projecting structure and having an average diameter that is not more than 0.5 times as great as the wavelength of the light.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: October 20, 2020
    Assignees: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, STANLEY ELECTRIC CO., LTD.
    Inventors: Shinichiro Inoue, Naoki Tamari