Patents Assigned to National Institute of Information and Communications Technology
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Patent number: 10963646Abstract: 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: GrantFiled: September 25, 2017Date of Patent: March 30, 2021Assignee: National Institute of Information and Communications TechnologyInventors: Kazuaki Inada, Chikara Hashimoto, Kentaro Torisawa
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Patent number: 10957303Abstract: 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: GrantFiled: February 21, 2018Date of Patent: March 23, 2021Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Kentaro Tachibana, Tomoki Toda
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Patent number: 10944481Abstract: 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: GrantFiled: May 12, 2017Date of Patent: March 9, 2021Assignee: National Institute of Information and Communications TechnologyInventor: Takahide Sakamoto
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Patent number: 10945223Abstract: 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: GrantFiled: January 18, 2017Date of Patent: March 9, 2021Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Nobuyasu Shiga, Masugi Inoue, Satoshi Yasuda, Kohta Kido
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Patent number: 10936664Abstract: 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: GrantFiled: July 26, 2017Date of Patent: March 2, 2021Assignee: National Institute of Information and Communications TechnologyInventors: Noriyuki Abe, Kanako Onishi, Kentaro Torisawa, Canasai Kruengkrai, Jonghoon Oh, Ryu Iida, Yutaka Kidawara
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Publication number: 20210032228Abstract: 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: ApplicationFiled: January 30, 2019Publication date: February 4, 2021Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Akira OTOMO, Isao AOKI, Toshiki YAMADA, Chiyumi YAMADA
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Patent number: 10911153Abstract: 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: GrantFiled: March 7, 2018Date of Patent: February 2, 2021Assignee: National Institute of Information and Communications TechnologyInventors: Toshimasa Umezawa, Takahide Sakamoto, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
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Patent number: 10909976Abstract: 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: GrantFiled: June 2, 2017Date of Patent: February 2, 2021Assignee: National Institute of Information and Communications TechnologyInventor: Naoyuki Kanda
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Publication number: 20210026221Abstract: The present disclosure provides a method for producing a laminate for non-linear optics.Type: ApplicationFiled: August 23, 2018Publication date: January 28, 2021Applicant: National Institute of Information and Communications TechnologyInventors: Takahiro KAJI, Yukihiro TOMINARI, Toshiki YAMADA, Akira OTOMO
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Patent number: 10892644Abstract: 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 plaType: GrantFiled: August 6, 2017Date of Patent: January 12, 2021Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Bing Zhang, Takashi Matsuda, Toshinori Kagawa, Ryu Miura
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Publication number: 20200407498Abstract: 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: ApplicationFiled: March 1, 2019Publication date: December 31, 2020Applicants: TEIJIN LIMITED, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Naoshi TAKAHASHI, Katsuhiro YAMANAKA, Akira OTOMO, Toshiki YAMADA
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Patent number: 10861945Abstract: 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: GrantFiled: August 18, 2015Date of Patent: December 8, 2020Assignees: TAMURA CORPORATION, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGYInventors: Kohei Sasaki, Ken Goto, Masataka Higashiwaki, Man Hoi Wong, Akinori Koukitu, Yoshinao Kumagai, Hisashi Murakami
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Patent number: 10845402Abstract: 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: GrantFiled: March 17, 2017Date of Patent: November 24, 2020Assignee: National Institute of Information and Communications TechnologyInventors: Shinji Fukui, Muneo Yorinaga, Masahiro Tsuchiya
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Patent number: 10825935Abstract: 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: GrantFiled: April 20, 2017Date of Patent: November 3, 2020Assignees: TAMURA CORPORATION, National Institute of Information and Communications TechnologyInventors: Kohei Sasaki, Masataka Higashiwaki
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Patent number: 10819429Abstract: 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: GrantFiled: January 19, 2018Date of Patent: October 27, 2020Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Dimitar Kolev, Morio Toyoshima
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Patent number: 10811577Abstract: 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: GrantFiled: April 26, 2018Date of Patent: October 20, 2020Assignees: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, STANLEY ELECTRIC CO., LTD.Inventors: Shinichiro Inoue, Naoki Tamari
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Patent number: 10803103Abstract: [Object] To provide a system for automatically and reliably collecting information belonging to a given category, and matching the information appropriately in a timely manner. [Solution] A text classifying device 30 analyzes dependency of collected texts by a morpheme analyzing unit 52 and a dependency analyzing unit 54. A problem report collecting unit 64 specifies a core consisting of noun+predicate in a text based on dependency relation of the text, and using a combination of noun classification (trouble/non-trouble) and predicate classification (excitatory/inhibitory), classifies the text to a problem report or the rest, by a method referred to as core-based matrix. Support information collecting device 66 and request message collecting device 68 collect support information and request messages in the similar manner.Type: GrantFiled: May 15, 2014Date of Patent: October 13, 2020Assignee: National Institute of Information and Communications TechnologyInventors: Motoki Sano, Istvan Varga, Kentaro Torisawa, Chikara Hashimoto, Kiyonori Ootake, Takao Kawai, Jonghoon Oh, Stijn De Saeger
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Patent number: 10796098Abstract: A new technology of prediction of manipulability in response even to an instruction with missing information in an object manipulation task to have a robot manipulate some kind of object is provided. An instruction understanding system includes an obtaining engine configured to obtain a linguistic expression of a name of an object to be manipulated and a linguistic expression of a situation where the object corresponding to the name is placed in a real environment and a classifier configured to receive input of the linguistic expression of the name and the linguistic expression of the situation and output manipulability of the object corresponding to the name in the real environment.Type: GrantFiled: September 6, 2018Date of Patent: October 6, 2020Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Komei Sugiura, Hisashi Kawai
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Publication number: 20200314831Abstract: To provide a wireless communication system that can implement optimal communication conditions depending on the type of data. A wireless communication system 100 for transmitting and receiving data to and from a plurality of terminals 2 for use in a narrow space includes normal transmitting/receiving means for transmitting and receiving normal data, among the data, to and from a terminal 2, based on priorities assigned to each of a plurality of buffers stored in a base station 1, and urgent transmitting/receiving means for assigning a high priority to a buffer storing a lowest amount of data among the plurality of buffers, and transmitting and receiving urgent data, among the data, which is different from the normal data, to and from the terminal, via the buffer to which the high priority is assigned.Type: ApplicationFiled: March 17, 2020Publication date: October 1, 2020Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Satoko ITAYA, Kenichi MARUHASHI, Fumiko OHORI, Fumihide KOJIMA
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Patent number: 10754064Abstract: Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore. Solution: a chromophore comprising a donor structure D, a ?-conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.Type: GrantFiled: April 3, 2018Date of Patent: August 25, 2020Assignees: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, SUMITOMO ELECTRIC INDUSTRIES, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Akira Otomo, Isao Aoki, Hideki Miki, Hidehisa Tazawa, Shiyoshi Yokoyama