Patents Assigned to The University of Electro-Communications
  • Publication number: 20200280545
    Abstract: An encrypted control system, an encrypted control method, and an encrypted control program make it possible to further reduce a risk of a cipher key leaking. An input device, a plant-side control device, and a controller are respectively equipped with pseudorandom number calculation units having a common function, are time synchronized, and start a synchronized operation at the same time. Since the encrypted control system is configured in such a manner, it becomes possible to switch a pair of a public key and a private key in synchronization with a control cycle of the entire control system. Consequently, it becomes possible to instantaneously and definitely detect intervention in the control system by a malicious third party.
    Type: Application
    Filed: October 19, 2018
    Publication date: September 3, 2020
    Applicant: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Kiminao KOGISO, Takashi SUZUKI
  • Patent number: 10763634
    Abstract: A laser resonator includes a pair of optical elements forming a first optical path having a focused beam waist, one or more mirrors forming a second optical path of approximately parallel light connected to the first optical path, and a laser medium arranged in the second optical path. Induced emission light generated from the laser medium reciprocates or circles in a path formed by the first optical path and the second optical path. A distance between the pair of optical elements is adjustable, and a beam diameter at the second optical path is adjusted by adjusting the distance between the pair of optical elements.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: September 1, 2020
    Assignee: The University of Electro-Communications
    Inventors: Masayuki Katsuragawa, Chiaki Ooae
  • Patent number: 10760900
    Abstract: A shape measurement method of the present invention includes: a step of irradiating a measurement object with an optical pulse train in which a plurality of optical pulses that have predetermined frequency distributions on a time axis are disposed chronologically in numerical order; and a step of measuring an optical shape of the measurement object in accordance with a correspondent relation between numbers of the optical pulses of a plurality of detection target optical pulse trains after the emitted optical pulse train acts on the measurement object and a correspondent relation between the frequency distributions in the optical pulses.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 1, 2020
    Assignee: The University of Electro-Communications
    Inventor: Kaoru Minoshima
  • Publication number: 20200203852
    Abstract: Circular loop antenna elements of each of a transmitting antenna and a receiving antenna have different perimeters of approximately integral multiples of a wavelength determined from a wireless communication frequency. The transmitting antenna and the receiving antenna include first circular loop antenna groups concentrically disposed on the same plane and second circular loop antenna groups including circular loop antenna elements of the same perimeter as that of a plurality of circular loop antenna elements of the first circular loop antenna group. An angular position of a terminal for connecting power supply units to circular loop antenna elements having the same perimeter is set to an angular position rotated by (2l+1)?/2mi (where l is any integer, and mi is a value of m1 to mN that are approximately integral multiples of a wavelength) in the first and second circular loop antenna groups.
    Type: Application
    Filed: May 1, 2018
    Publication date: June 25, 2020
    Applicant: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Akira SAITOU, Hiroto OTSUKA, Kazuhiko HONJO, Ryo ISHIKAWA
  • Patent number: 10637519
    Abstract: A concurrent-type multiband amplifier (or a dual-band amplifier) which amplifies multiband signals concurrently using a plurality of (N) amplifier circuits which each independently amplify signals in a plurality of (N) frequency bands. An n-th (n=any of 1 to N) amplifier circuit is provided with a circuit for blocking signals in frequency bands other than the n-th frequency band so as to amplify and output only the n-th frequency band signal. The n-th amplifier circuit is designed so as to consist of its input/output impedance matching circuit for the n-th an amplifier element at the n-th frequency band.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: April 28, 2020
    Assignee: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Yoichiro Takayama, Kazuhiko Honjo, Ryo Ishikawa
  • Patent number: 10617345
    Abstract: The estimation of the sleep stage at a time point where data does not exist, is enabled. An acquiring unit configured to acquire biological data indicating a wave of a heartbeat; a parameter estimating unit configured to estimate a parameter by using the biological data, with respect to a mathematical expression defining a medium frequency component of the wave of the heartbeat by using the parameter; and a sleep stage estimating unit configured to estimate a sleep stage from a value of the medium frequency component at any time point, based on the mathematical expression to which the estimated parameter is applied, are included.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: April 14, 2020
    Assignee: The University of Electro-Communications
    Inventors: Keiki Takadama, Tomohiro Harada
  • Patent number: 10573009
    Abstract: Provided is an in vivo movement tracking apparatus configured to track a portion of interest that moves in vivo, in which accuracy and robustness of tracking are improved. The apparatus is configured to determine an estimated position of ah organ in a biological image based on the past movement of the organ and search for contour points corresponding to a plurality of control points, respectively, representing a contour shape of the organ in a region corresponding to the estimated position, to thereby determine an estimated contour of the organ based on the contour points. The in vivo movement tracking apparatus is configured to determine a position of a portion of interest, which moves in association with the organ, based on the estimated contour with reference to previously acquired sample data regarding a positional relationship between a contour of the organ and the portion of interest.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: February 25, 2020
    Assignees: THE UNIVERSITY OF TOKYO, THE UNIVERSITY OF ELECTRO-COMMUNICATIONS, PUBLIC UNIVERSITY CORPORATION YOKOHAMA CITY UNIVERSITY
    Inventors: Norihiro Koizumi, Atsushi Kayasuga, Kyohei Tomita, Izumu Hosoi, Yu Nishiyama, Hiroyuki Tsukihara, Hideyo Miyazaki, Hiroyuki Fukuda, Kazushi Numata, Kiyoshi Yoshinaka, Takashi Azuma, Naohiko Sugita, Yukio Homma, Yoichiro Matsumoto, Mamoru Mitsuishi
  • Patent number: 10535159
    Abstract: An in vivo motion tracking device tracking an in vivo motion that is a tracking target included in an ultrasonic image includes an image acquiring unit that is configured to acquire an ultrasonic image, an advance learning unit that is configured to perform advance learning using the ultrasonic image as learning data, and a tracking unit that is configured to track a position of the tracking target in an ultrasonic image including the tracking target after the advance learning performed by the advance learning unit.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: January 14, 2020
    Assignees: The University of Electro-Communications, PUBLIC UNIVERSITY CORPORATION YOKOHAMA CITY UNIVERSITY
    Inventors: Norihiro Koizumi, Yu Nishiyama, Ryosuke Kondo, Kyohei Tomita, Fumio Eura, Kazushi Numata
  • Publication number: 20190385628
    Abstract: This voice conversion/voice identity conversion device is provided with a parameter learning unit, a parameter storage unit and a voice conversion/voice identity conversion processing unit. The parameter learning unit prepares a probability model by means of a restricted Boltzmann machine assuming that there is a connection weight between a visible element representing input data and a hidden element representing potential information. The parameter learning unit defines, as a probability model, a plurality of speaker clusters having specific adaptive matrices, and determines parameters for each speaker by estimating weights for the plurality of speaker clusters. The parameter storage unit stores the parameters. A voice conversion/voice identity conversion processing unit performs voice conversion/voice identity conversion processing of acoustic information based on the voice of a source speaker based on the parameters stored in the parameter storage unit and speaker information of a target speaker.
    Type: Application
    Filed: February 27, 2018
    Publication date: December 19, 2019
    Applicant: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventor: Toru NAKASHIKA
  • Patent number: 10388271
    Abstract: Information can be provided upon quantitatively associating a sound symbolism word and a physical feature. An input unit configured to input a sound symbolism word; a morpheme analyzing unit configured to analyze a phonemic element included in the sound symbolism word; a physical feature estimating unit configured to estimate a physical feature value corresponding to the sound symbolism word based on a phonemic physical feature database defining a correlation between a phonemic element and a physical feature value, with respect to the phonemic element included in the sound symbolism word; and a presenting unit configured to present the estimated physical feature value, are included.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: August 20, 2019
    Assignee: The University of Electro-Communications
    Inventors: Maki Sakamoto, Tatsuki Kagitani
  • Publication number: 20190252794
    Abstract: A wireless communication apparatus includes a transmitting antenna; and a receiving antenna that receives a wireless signal transmitted from the transmitting antenna. Each of the transmitting antenna and the receiving antenna includes a plurality of circular loop antennas arranged concentrically in an identical plane, each of the plurality of circular loop antennas having a loop perimeter approximately equal to an integer multiple of one wavelength determined from a frequency in a wireless communication; and a plurality of feeding sections individually connected with the plurality of circular loop antennas. A central axis of the plurality of circular loop antennas of the transmitting antenna and a central axis of the plurality of circular loop antennas of the receiving antenna are arranged approximately on a straight line. Thus, a wireless signal is transmitted between the circular loop antennas having a loop perimeter of a transmitting side and a receiving side.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 15, 2019
    Applicant: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Akira SAITO, Kazuhiko HONJO, Ryo ISHIKAWA, Hiroto OTSUKA
  • Patent number: 10311888
    Abstract: A voice conversion device includes: a parameter learning unit in which a probabilistic model that uses speech information, speaker information, and phonological information as variables to thereby express relationships among binding energies between any two of the speech information, the speaker information and the phonological information by parameters is prepared, wherein the speech information is obtained based on a speech, the speaker information corresponds to the speech information, and the phonological information expresses the phoneme of the speech, and in which the parameters are determined by performing learning by sequentially inputting the speech information and the speaker information into the probabilistic model; and a voice conversion processing unit that performs voice conversion processing of the speech information obtained on the basis of the speech of an input speaker, based both on the parameters determined by the parameter learning unit and on the speaker information of a target speaker.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: June 4, 2019
    Assignee: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Toru Nakashika, Yasuhiro Minami
  • Patent number: 10258794
    Abstract: Provided is an electrical stimulation device including a first to fourth electrodes, and an electrical stimulation generation section which supplies an electrical stimulation signal to each of the first to fourth electrodes. The electrical stimulation generation section supplies, to the first and second electrodes, an electrical stimulation signal according to a first stimulation pattern, and supplies, to the third and fourth electrodes, an electrical stimulation signal according to a second stimulation pattern. The first stimulation pattern is set so that an electrical stimulation signal for changing stimulation intensity according to a first waveform is supplied to the first electrode, and an electrical stimulation signal for changing stimulation intensity according to a second waveform is supplied to the second electrode, the second waveform being increased and decreased in conjunction with the first waveform.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: April 16, 2019
    Assignees: SYSTEM INSTRUMENTS CO., LTD., THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Takeshi Akiba, Hiroshi Yokoi
  • Publication number: 20190051314
    Abstract: A voice conversion device includes: a parameter learning unit in which a probabilistic model that uses speech information, speaker information, and phonological information as variables to thereby express relationships among binding energies between any two of the speech information, the speaker information and the phonological information by parameters is prepared, wherein the speech information is obtained based on a speech, the speaker information corresponds to the speech information, and the phonological information expresses the phoneme of the speech, and in which the parameters are determined by performing learning by sequentially inputting the speech information and the speaker information into the probabilistic model; and a voice conversion processing unit that performs voice conversion processing of the speech information obtained on the basis of the speech of an input speaker, based both on the parameters determined by the parameter learning unit and on the speaker information of a target speaker.
    Type: Application
    Filed: February 22, 2017
    Publication date: February 14, 2019
    Applicant: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Toru NAKASHIKA, Yasuhiro MINAMI
  • Patent number: 10104142
    Abstract: A data processing device, data processing method, program, recording medium, and data processing system have a data size calculation unit that calculates the data size of a joined frame generated if an assumption is made that a first frame inside a first video stream and a second frame inside a second video stream are joined; a header creation unit that creates a header for a multiplexed stream including a joined video stream, using the data size information for the joined frame; a joined video stream generation unit that generates the joined video stream; and a multiplexed stream output unit that performs header output processing for the multiplexed stream or outputs the multiplexed stream including the joined video stream.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: October 16, 2018
    Assignee: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventor: Hiroyuki Kasai
  • Patent number: 10094002
    Abstract: A Cu—Be alloy according to the present invention is a Co-containing Cu—Be alloy, in which the Co content is 0.005% to 0.12% by mass, and the number of Cu—Co-based compound particles having a particle size of 0.1 ?m or more that can be confirmed on a TEM image at a magnification of 20,000 is five or less in a field of view of 10 ?m×10 ?m. Furthermore, a method for producing a Cu—Be alloy according to the present invention includes a solution annealing treatment step of subjecting a Cu—Be alloy raw material containing 0.005% to 0.12% by mass of Co and 1.60% to 1.95% by mass of Be to solution annealing treatment to obtain a solution-annealed material.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: October 9, 2018
    Assignees: NGK Insulators, Ltd., The University of Electro-Communications
    Inventors: Hiromi Miura, Naokuni Muramatsu
  • Patent number: 9964839
    Abstract: Even when a high-performance imaging apparatus is not used, luminance unevenness and color unevenness of an image (video) projected on a projection plane by the projection type projector apparatus are appropriately reduced. Using a coefficient Br (0?Br?1) set by a coefficient setting unit, the projection system obtains, based on the gamma characteristic of the entire system of the projection system, a target image for reducing the number of pixels saturated when the image is projected. Then, the projection system performs correction processing using the obtained target image based on the gamma characteristic of the entire system of the projection system and a white value. This reduces the number of saturated pixels of the projected image in the projection system.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: May 8, 2018
    Assignees: MegaChips Corporation, The University of Electro-Communications
    Inventors: Naoki Hashimoto, Chiharu Kohari, Yuki Haraguchi, Fumiya Shingu, Motoyasu Tanaka
  • Publication number: 20180115333
    Abstract: A concurrent-type multiband amplifier (or a dual-band amplifier) which amplifies multiband signals concurrently using a plurality of (N) amplifier circuits which each independently amplify signals in a plurality of (N) frequency bands. An n-th (n=any of 1 to N) amplifier circuit is provided with a circuit for blocking signals in frequency bands other than the n-th frequency band so as to amplify and output only the n-th frequency band signal. The n-th amplifier circuit is designed so as to consist of its input/output impedance matching circuit for the n-th an amplifier element at the n-th frequency band.
    Type: Application
    Filed: June 8, 2016
    Publication date: April 26, 2018
    Applicant: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
    Inventors: Yoichiro TAKAYAMA, Kazuhiko HONJO, Ryo ISHIKAWA
  • Publication number: 20180024423
    Abstract: Even when a high-performance imaging apparatus is not used, luminance unevenness and color unevenness of an image (video) projected on a projection plane by the projection type projector apparatus are appropriately reduced. Using a coefficient Br (0?Br?1) set by a coefficient setting unit, the projection system obtains, based on the gamma characteristic of the entire system of the projection system, a target image for reducing the number of pixels saturated when the image is projected. Then, the projection system performs correction processing using the obtained target image based on the gamma characteristic of the entire system of the projection system and a white value. This reduces the number of saturated pixels of the projected image in the projection system.
    Type: Application
    Filed: September 29, 2017
    Publication date: January 25, 2018
    Applicants: MegaChips Corporation, The University of Electro-Communications
    Inventors: Naoki HASHIMOTO, Chiharu KOHARI, Yuki HARAGUCHI, Fumiya SHINGU, Motoyasu TANAKA
  • Patent number: 9857659
    Abstract: A laser device includes a light source that radiates a laser beam having one or more frequencies, and a nonlinear optical medium on which the laser beam is incident, the non-linear optical medium including at least one dispersive medium that is transparent and arranged along a direction in which the laser beam is radiated. The nonlinear optical medium drives a nonlinear optical process including generation of laser beams having different frequencies. The at least one dispersive medium has an effective thickness that causes a relative phase relationship among all the laser beams relevant to the nonlinear optical process to approximately satisfy a predetermined value.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: January 2, 2018
    Assignee: The University of Electro-Communications
    Inventor: Masayuki Katsuragawa