Patents Assigned to Nippon Telegraph and Telephone Corporation
  • Patent number: 10790963
    Abstract: The blockchain generation apparatus 1 includes: a synchronizer 121 that acquires shared data 111 which includes the blockchain data 112 and transaction datasets 113 not included in the blockchain data 112; a transaction pattern count calculator 124 that calculates the number of transaction patterns for a generating party using the blockchain generation apparatus 1, based on the transaction datasets which are in the blockchain data 112 and are related to an identifier of the generating party; a block generation condition checker 125 that determines whether the generating party is qualified to generate the new blockchain data, based on the number of transaction patterns calculated by the transaction pattern count calculator; and a blockchain generator 126 that tries to generate the new blockchain by referring to the shared data 111 if the block generation condition checker 125 determines that the generating party is qualified.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: September 29, 2020
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hiroki Watanabe, Akihito Akutsu, Yasuhiko Miyazaki, Atsushi Nakadaira, Shigeru Fujimura, Junichi Kishigami
  • Patent number: 10789366
    Abstract: In a security information management device (10), security information, which is information related to security, is collected. The security information management device (10) extracts, by referring to a security dictionary storing therein a keyword related to security for each attribute, a keyword from referrer security information that becomes a source to be compared with security information for relevance thereto, and calculates, by comparing the extracted keyword with a keyword included in the collected security information, relevance between the referrer security information and the security information. The security information management device (10) then output security information having higher calculated relevance more preferentially.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: September 29, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tohru Sato, Yasushi Okano, Hiroshi Asakura, Shingo Orihara
  • Patent number: 10790905
    Abstract: The optical fiber according to the present disclosure is an optical fiber having a pure silica core which is a step index core through which an LPm1 mode with an effective area of 250 ?m2 or more is propagated by setting a relative refractive index difference to 0.60% or less, considering an effective cutoff condition, and only 2 or more modes or the LPm1 mode are propagated, with the optical fiber as the transmission line.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: September 29, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takayoshi Mori, Taiji Sakamoto, Takashi Yamamoto, Kazuhide Nakajima, Masaki Wada, Azusa Urushibara
  • Publication number: 20200304180
    Abstract: An OAM multiplexing transmission device includes a unit generating each of the transmission streams in a baseband (BB), in which a channel estimation signal sequence is disposed before a transmission target data signal sequence, and a CP having a predetermined length is disposed in the first half of the channel estimation signal sequence, the channel estimation signal sequence is time-shifted with a channel estimation signal sequence (a basic channel estimation signal sequence) having a predetermined length and a zero correlation, by a predetermined shift value for each of the transmission streams; a unit converting a baseband signal sequence of the generated transmission streams to frequency conversion into RF band, or converting into IF band and then converting into the RF band; and a unit converting a plurality of the frequency-converted transmission streams into a plurality of OAM mode signals having different orders, and multiplexing spatially by using the UCA.
    Type: Application
    Filed: September 25, 2018
    Publication date: September 24, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Doohwan LEE, Hirofumi SASAKI, Hiroyuki FUKUMOTO, Hiroyuki SHIBA
  • Publication number: 20200302953
    Abstract: With correct emotion classes selected as correct values of an emotion of an utterer of a first utterance from among a plurality of emotion classes C1, . . . , CK by listeners who have listened to the first utterance, as an input, the numbers of times ni that emotion classes Ci have been selected as the correct emotion classes are obtained, and rates of the numbers of times nk to a sum total of the numbers of times n1, . . . , nK or smoothed values of the rates are obtained as correct emotion soft labels tk(s) corresponding to the first utterance.
    Type: Application
    Filed: November 12, 2018
    Publication date: September 24, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Atsushi ANDO, Hosana KAMIYAMA, Satoshi KOBASHIKAWA
  • Patent number: 10782478
    Abstract: A differential mode attenuation compensator includes a first multi-mode optical fiber and a third multi-mode optical fiber in which a plurality of propagation modes propagate in a wavelength of a propagating optical signal; and a second multi-mode optical fiber including a core and a clad and arranged with a central axis aligned between the first multi-mode optical fiber and the third multi-mode optical fiber, in which each loss in the plurality of propagation modes is different in the first multi-mode optical fiber and the third multi-mode optical fiber.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: September 22, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masaki Wada, Taiji Sakamoto, Takayoshi Mori, Shinichi Aozasa, Takashi Yamamoto, Kazuhide Nakajima
  • Publication number: 20200296599
    Abstract: In an OAM multiplexing communication system that subjects a plurality of signal sequences to multiplex transmission by using an OAM mode, a transmitting station includes a transmitting antenna using an M-UCA formed of a plurality of UCAs, and a unit performing basis transformation in each of the rotational direction dimension and a diameter direction dimension in a polar coordinate system having a center of UCAs as an origin, and subjecting the plurality of signal sequences to multiplex transmission for each complex mode formed by a combination of different bases in each dimension. A receiving station includes a receiving antenna using an M-UCA, and a unit receiving a signal subjected to multiplex transmission from the transmitting station, performing basis transformation in each of the rotational direction dimension and the diameter direction dimension by using the received signal, and demultiplexing the plurality of signal sequences subjected to the multiplex transmission.
    Type: Application
    Filed: September 25, 2018
    Publication date: September 17, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirofumi SASAKI, Doohwan LEE, Hiroyuki FUKUMOTO, Hiroyuki SHIBA
  • Patent number: 10772524
    Abstract: A biomedical electrode which is detachably attached to a garment and includes: an electrode coming into contact with a living body clothed in the garment to acquire a biological signal emitted by the living body; and a locked section which is conductive, is electrically connected to the electrode, is detachably locked to a locking section which is conductive and is provided in the garment, and is electrically connected to the locking section when locked to the locking section.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: September 15, 2020
    Assignees: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, TORAY INDUSTRIES, INC.
    Inventors: Shingo Tsukada, Nahoko Kasai, Koji Sumitomo, Hiroshi Nakashima, Masanobu Sato, Toru Arakane, Yuri Hamano, Keiji Takeda, Noriko Nagai, Takashi Teshigawara
  • Patent number: 10775650
    Abstract: An optical modulator includes a p-type first semiconductor layer (102) formed on a clad layer (101), an insulating layer (103) formed on the first semiconductor layer (102), and an n-type second semiconductor layer (104) formed on the insulating layer (103). The first semiconductor layer (102) is made of silicon or silicon-germanium, and the second semiconductor layer (104) is formed from a III-V compound semiconductor made of three or more materials.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: September 15, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tatsurou Hiraki, Shinji Matsuo
  • Patent number: 10778296
    Abstract: Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: September 15, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoki Murakami, Yusuke Asai, Riichi Kudo, Koichi Ishihara, Masato Mizoguchi, Takeo Ichikawa
  • Publication number: 20200283150
    Abstract: Provided is a G tolerance improvement device provided with: an estimation unit that estimates either or both of a body fluid volume in the head of a user and a change amount of the body fluid volume; and a pressurization unit that applies pressure to the user on the basis of either or both of the body fluid volume and the change amount estimated by the estimation unit.
    Type: Application
    Filed: September 21, 2018
    Publication date: September 10, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shingo TSUKADA, Hiroshi NAKASHIMA
  • Publication number: 20200279511
    Abstract: Data is efficiently read from and written in a sequence without an access position being revealed. A secure reading and writing apparatus (1) receives a read command or a write command as input, and, when the read command is input, outputs a secret text [a[x]] which is an x-th element of a secret text sequence [a], and, when the write command is input, adds the secret text [a[x]] which is the x-th element of the secret text sequence [a], to a secret text [d]. A secure reading part (12) reads the secret text [a[x]] which is the x-th element from the secret text sequence [a]. A buffer addition part (13) adds a secret text [c] of an unreflected value c to the secret text [a[x]]. A buffer appending part (14) appends a secret text [x] and the secret text [d] to a write buffer [b].
    Type: Application
    Filed: September 12, 2018
    Publication date: September 3, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Koki HAMADA
  • Publication number: 20200273602
    Abstract: An elastic wiring includes: an elastic tube; a conductor wire arranged within the tube; and fixing portions that fix the conductor wire and the tube at both ends of the tube in the lengthwise direction, wherein the length of the conductor wire between the fixing portions when the tube is in an unextended state is longer than the length of the tube between the fixing portions.
    Type: Application
    Filed: November 13, 2018
    Publication date: August 27, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shingo TSUKADA, Hiroshi NAKASHIMA
  • Publication number: 20200274704
    Abstract: On the assumption that i?s, j is the number of times a key exchange is performed, and k is any one of integers greater than or equal to 0 and less than j, a key exchange device includes: a shared secret key storage in which shared secret information mkik which is information different from a secret key of the key exchange device is stored; an authentication information addition unit that generates authentication information ?i, by which authentication is performed and falsification is detected, for key exchange information ei, which is output to the outside, by using the shared secret information mkik; and an authentication information verification unit that receives key exchange information es and authentication information ?s corresponding to the key exchange information es from the outside, verifies the authentication information ?s using the shared secret information mkik, and, if the authentication information ?s is not successfully verified, stops a key exchange, and the shared secret information mkik i
    Type: Application
    Filed: November 9, 2018
    Publication date: August 27, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro MATSUI, Yuki OKANO, Tetsutaro KOBAYASHI, Reo YOSHIDA
  • Publication number: 20200273474
    Abstract: An envelope sequence is provided that can improve approximation accuracy near peaks caused by the pitch period of an audio signal. A periodic-combined-envelope-sequence generation device according to the present invention takes, as an input audio signal, a time-domain audio digital signal in each frame, which is a predetermined time segment, and generates a periodic combined envelope sequence as an envelope sequence. The periodic-combined-envelope-sequence generation device according to the present invention comprises at least a spectral-envelope-sequence calculating part and a periodic-combined-envelope generating part. The spectral-envelope-sequence calculating part calculates a spectral envelope sequence of the input audio signal on the basis of time-domain linear prediction of the input audio signal.
    Type: Application
    Filed: May 14, 2020
    Publication date: August 27, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro MORIYA, Yutaka KAMAMOTO, Noboru HARADA
  • Publication number: 20200272422
    Abstract: A synthetic data generation apparatus includes: a random number generating unit that generates first synthetic data with a ratio of a frequency distribution of each attribute being approximate to the ratio of the frequency distribution of that attribute in target data for which synthetic data is to be generated; and a data formatting unit that formats the first synthetic data using a matrix given by Cholesky decomposition of a variance-covariance matrix of the target data or a scaling matrix given by singular value decomposition of the variance-covariance matrix of the target data such that a mean vector and a correlation matrix of the first synthetic data agree with a mean vector and a correlation matrix of the target data and that a minimum and a maximum of the first synthetic data are present in ranges of a minimum and a maximum of the target data, and provides the first synthetic data after formatting as synthetic data.
    Type: Application
    Filed: October 5, 2018
    Publication date: August 27, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Rina OKADA, Satoshi HASEGAWA, Shogo MASAKI
  • Patent number: 10750969
    Abstract: A heartbeat detection device includes a peak search unit (4) for searching for one of a peak at which a value M obtained from a sampling data sequence of an electrocardiographic waveform of a living body changes from an increase to a decrease and a peak at which the value M changes from a decrease to an increase, and a heartbeat time determination unit (5) for checking the value M in a predetermined time domain before a time of the peak and the value M in a predetermined time domain after the time of the peak, and setting the time of the peak as a heartbeat time if differences between the value M at the time of the peak and the values M in the predetermined time domains are not smaller than a predetermined amount.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: August 25, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Nobuaki Matsuura, Kei Kuwabara, Kazuhiko Takagahara, Ryusuke Kawano, Hiroshi Koizumi
  • Patent number: 10756819
    Abstract: An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: August 25, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shuto Yamamoto, Akira Masuda, Yoshiaki Sone, Mitsunori Fukutoku
  • Patent number: 10748454
    Abstract: An assigned share which is a proper subset of a subshare set with a plurality of subshares as elements, and meta information indicating values according to the elements of the subshare set or indicating that the elements are concealed values are stored. When a value according to a provided corresponding value according to a subset of the assigned share is not obtained from the meta information, a provided value according to the provided corresponding value obtained from the subset of the assigned share is outputted. When a value according to an acquired corresponding value according to a subset of an external assigned share, which is a proper subset of the subshare set, is not obtained from the meta information, input of an acquired value according to the acquired corresponding value is accepted. When the acquired value is inputted, a secret share value is obtained at least using the acquired value.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 18, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Dai Ikarashi
  • Patent number: 10747887
    Abstract: A vulnerability detection device includes a vulnerability portion extracting unit that extracts a first program code corresponding to an uncorrected vulnerability portion of software, a normalization processing unit that normalizes a parameter varying depending on compilation environment, among parameters included in the extracted first program code and in a second program code of software as a target to be tested for the vulnerability portion, a similarity calculating unit that calculates a similarity of an arbitrary portion of the second program code after normalization as a comparison target to the first program code, and a determining unit that refers to vulnerability related information for a portion of the second program code in which the calculated first similarity exceeds a predetermined threshold, and that determines whether the portion of the second program code is an unknown vulnerability portion.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: August 18, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Asuka Nakajima, Makoto Iwamura, Takeshi Yada