Patents Assigned to Hitachi Kokusai Electric Inc.
  • Patent number: 10532401
    Abstract: In a method of manufacturing a liquid-cooling cold plate, cast molding is performed after embedding a metal pipe for supplying a cooling liquid inside a casting mold. Fixing brackets to be attached to the metal pipe is provided to maintain a positional relationship between a plurality of portions of the metal pipe embedded in the casting mold. The casting molding is performed by pouring molten metal into the casting mold while the fixing metal parts are attached to the metal pipe.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: January 14, 2020
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Satoru Ujiie, Takahiro Daikoku
  • Publication number: 20200014409
    Abstract: Domain management functionality is implemented internally to a software-defined radio device. A software-defined radio device that includes plural hardware modules 220 to 222 and implements radio device functions by downloading radio communication software programs 203 for controlling the plural hardware modules from outside. The software-defined radio device includes domain management software 202 among environment software programs 215 that are activated when the device is activated. The domain management software generates an interface necessary to use each of the radio communication software programs according to a domain for each of the radio communication software programs and performs activation, setup, and connection with other programs for each of the radio communication software programs.
    Type: Application
    Filed: February 19, 2018
    Publication date: January 9, 2020
    Applicant: Hitachi Kokusai Electric Inc.
    Inventor: Tomoya SHOJI
  • Patent number: 10531094
    Abstract: Provided is an image processing device which performs scaling and applies super-resolution in accordance with the complexity of the image. On the compression side, a complexity calculation unit calculates the transmission image complexity, which indicates the complexity of the input image, multiplexes and outputs it to an encoded stream, and a control unit configures the cutoff frequency of a low pass filter and the scaling coefficient of an image reduction unit in accordance with the transmission image complexity. On the decompression side, a complexity calculation unit calculates the decoded image complexity indicating the complexity of a decoded and expanded image, a complexity comparison unit compares the transmission image complexity and the decoded image complexity and outputs the difference or ratio, and, on the basis of output, a parameter calculation unit optimizes and configures the scaling coefficient of an image enlargement unit and the folding frequency of a super-resolution processing unit.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: January 7, 2020
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Tadakazu Kadoto, Masatoshi Kondo, Muneaki Yamaguchi
  • Patent number: 10521885
    Abstract: Provided is an image processing apparatus that can reduce degradation in image quality due to heat haze and the like. An input image memory 110 stores an input image group 200 and an input image 210. A time-series smoothed image memory 112 stores a time-series smoothed image 220 obtained by time series smoothing. A moving body removed image memory 113 stores a moving body removed image 230 that is a background image. A histogram analyzing unit 130 computes a differential of histograms of partial images for the input image 210 and the time-series smoothed image 220 or the moving body removed image 230, and calculates similarity information between the images. On the basis of the similarity information, a region dividing unit 140 divides the input image 210 into a moving body region, and a region other than the moving body region. An image correcting unit 150 performs image synthesis of the input image 210 or the time series-smoothed image 220, for each of the regions.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: December 31, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Masashi Takahashi, Nobuhiro Chihara, Muneaki Yamaguchi
  • Publication number: 20190393922
    Abstract: There is provided a wireless device capable of supporting both of TDD and FDD wireless communications with a simple configuration. The wireless device includes a transmitter that transmits a signal of a first frequency; a DPD receiver that receives signals of the first frequency; a receiver that receives signals of a second frequency; a duplexer having a first filter having passband characteristics in the first frequency band and a second filter having passband characteristics in the second frequency band; and a circulator that splits the signal from the transmitter to output the split signals to the duplexer and the DPD receiver, and outputs a reception signal from the duplexer to the DPD receiver. The duplexer is connected to the circulator on the first filter side and to the receiver on the second filter side, and uses the DPD receiver for FDD and TDD transmission feedback and for TDD reception.
    Type: Application
    Filed: January 25, 2018
    Publication date: December 26, 2019
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: TERUFUMI NAGANO, HIDEAKI SHIMIZU
  • Patent number: 10505596
    Abstract: A wireless communication system having a plurality of antennas is disclosed. A combination of transmission antennas and reception antennas is selected, the combination allowing ? to be the closest to ? radians, where ? represents an absolute value of an angle obtained by subtracting ?2 from ?1, where ?1 represents an angle formed by signal vectors transmitted from an i-th and a j-th transmission antennas of the first wireless device on an orthogonal plane on which a reception signal of a k-th reception antenna of the second wireless device is quadrature-detected or demodulated, and ?2 represents an angle formed by the signal vectors transmitted from the i-th and the j-th transmission antennas of the first wireless device on an orthogonal plane on which a reception signal of an l-th reception antenna of the second wireless device is quadrature-detected or demodulated.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: December 10, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Naoki Hongo
  • Publication number: 20190371609
    Abstract: Described herein is a technique capable of selectively growing a film with a high selectivity on a substrate with surface portions of different materials. According to one aspect of the technique of the present disclosure, there is provided a method of manufacturing a semiconductor device including: (a) forming a second metal film on a substrate with a first metal film and an insulating film formed thereon by alternately supplying a metal-containing gas and a reactive gas onto the substrate, wherein an incubation time on the insulating film is longer than that on the first metal film; and (b) supplying an etching gas onto the substrate to remove the second metal film formed on the insulating film while allowing the second metal film to remain on the first metal film, wherein the second metal film is selectively grown on the first metal film by alternately repeating (a) and (b).
    Type: Application
    Filed: August 8, 2019
    Publication date: December 5, 2019
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Motomu DEGAI, Kimihiko NAKATANI, Hiroshi ASHIHARA
  • Publication number: 20190372725
    Abstract: A wireless communication system includes a transmitter that discretely inserts null subcarriers into an OFDM-demodulated signal in time and frequency domains, and a receiver that receive signals by a first and second antennas. The receiver calculates a complex coefficient wherein a result of multiplying a first reception vector for each of the null subcarriers received by the first antenna by the complex coefficient is equal to an amplitude of a second reception vector of the corresponding null subcarrier received by the second antenna and is opposite in phase thereto, calculates a fourth reception vector by multiplying a third reception vector of any data subcarrier received by the first antenna by a coefficient that is obtained by interpolating the complex coefficient, and adds the fourth reception vector to a fifth reception vector of the any data subcarrier received by the second antenna.
    Type: Application
    Filed: February 13, 2018
    Publication date: December 5, 2019
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: NAOKI HONGO
  • Patent number: 10491202
    Abstract: An RF generator includes: a modulation circuit outputting a pulsed RF signal; a variable attenuation circuit adjusting the level of the pulsed RF signal; an output power detecting unit detecting an output power value of the power output from the device; a first comparative arithmetic circuit outputting a first level control signal for controlling the level of the adjusted pulsed RF signal on the basis of a first detected voltage value and a set voltage value set in advance; a second comparative arithmetic circuit outputting a second level control signal for controlling the level of the adjusted pulsed RF signal on the basis of a second detected voltage value and the set voltage value; and a switching circuit switching between the value of the first level control signal and the value of the second level control signal depending on a switching timing setting value.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: November 26, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yoshiyuki Oshida, Kenji Nasu, Naoya Fujimoto
  • Patent number: 10473463
    Abstract: In a technology for detecting the water level of a river by image processing, after an angle of view setting process, an area setting unit sets an arbitrarily defined certain range from the center of the set angle of view as a processing area. Then, a flow processing unit calculates, from the processing area, motion information and a flow direction, computes a flow density, determines a region having a high density and similar flow directions to be a flow of water currents, and deletes flows in the other directions. Thereafter, a graph-cut processing unit creates an object seed and a background seed for graph-cutting, and detects a water surface by automatic graph-cutting. After an edge extraction processing unit has performed edge extraction, a water level calculation processing unit determines an edge that satisfies a predetermined condition to be a water level line, and outputs a water level measurement result.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: November 12, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Yoshiki Agata
  • Patent number: 10469110
    Abstract: In a noise canceller device, interference signal adjustment units adjust delay, phase and amplitude of a signal received by a sub antenna under different conditions to obtain adjustment signals, and subtract the adjustment signals from a signal received by a main antenna to obtain differential signals. An average power calculation unit calculates an average power for each of the differential signals. An optimal condition search unit determines the values of delay, phase and amplitude that result in the minimum average power, and sets the values in an optimal interference signal adjustment unit. The optimal interference signal adjustment unit adjusts the signal received by the sub antenna using optimal values for delay, phase and amplitude to obtain an optimal adjustment signal. A cancellation unit subtracts the optimal adjustment signal from the signal received by the main antenna to remove interference signals, and outputs a desired signal to a host device.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: November 5, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yoichi Kushioka, Koji Yotsumoto, Mitsuhiro Takashima
  • Patent number: 10449982
    Abstract: One of the first and second wireless communication devices is disposed in a mobile object, and the other is fixed. The first wireless communication device includes a wireless transmission/reception unit that transmits data to the second wireless communication device and performs wireless transmission and reception in order to detect whether the mobile object is stopped. When, in a first mode for transmitting data to the second wireless communication device and determining whether the reception strength of a received signal is equal to or greater than a first value, the first wireless communication device detects that the reception strength is equal to or greater than the first value, the first wireless communication device stops the transmission of data to the second wireless communication device, exits the first mode, and transitions to a second mode for determining whether the mobile object is stopped.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: October 22, 2019
    Assignee: Hitachi Kokusai Electric Inc.
    Inventor: Kenichi Kashima
  • Publication number: 20190319651
    Abstract: In a noise canceller device, interference signal adjustment units adjust delay, phase and amplitude of a signal received by a sub antenna under different conditions to obtain adjustment signals, and subtract the adjustment signals from a signal received by a main antenna to obtain differential signals. An average power calculation unit calculates an average power for each of the differential signals. An optimal condition search unit determines the values of delay, phase and amplitude that result in the minimum average power, and sets the values in an optimal interference signal adjustment unit. The optimal interference signal adjustment unit adjusts the signal received by the sub antenna using optimal values for delay, phase and amplitude to obtain an optimal adjustment signal. A cancellation unit subtracts the optimal adjustment signal from the signal received by the main antenna to remove interference signals, and outputs a desired signal to a host device.
    Type: Application
    Filed: August 24, 2017
    Publication date: October 17, 2019
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: YOICHI KUSHIOKA, KOJI YOTSUMOTO, MITSUHIRO TAKASHIMA
  • Patent number: 10425583
    Abstract: An imaging device captures an object. The imaging device includes: an imaging unit that captures the object and outputs video data; a memory unit that stores therein the video data from the imaging unit; a video signal processing unit that reads the video data from the memory unit at a frame rate lower than a frame rate at which the video data are written into the memory unit and performs signal processing on the video data; an output interface unit that outputs to an external device the video data; and a control unit that outputs to the imaging unit an instruction to capture the specific number of frames and to write video data into the memory unit as an exposure period signal, instructs the video signal processing unit to output the video data from the memory unit, and outputs to the external device an imaging period signal.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: September 24, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Tomoya Ohsawa
  • Patent number: 10419391
    Abstract: An IP communication system has a switching hub having at least first to (n+1)-th ports (where n is an integer equal to or greater than two); first to n-th IP devices connected to the respective first to n-th ports; and an IP address setting unit connected to the (n+1)-th port. The IP address setting unit transmits, to the switching hub, a first port open instruction to open the first port and to close the second to n-th ports, and thereafter transmits, to the switching hub, a first IP address to be set to the first IP device. Upon reception of the first port open instruction from the IP address setting unit, the switching hub opens the first port and closes the second to n-th ports. Upon reception of the first IP address, the switching hub transmits the first IP address to the first IP device.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: September 17, 2019
    Assignee: Hitachi Kokusai Electric Inc.
    Inventor: Tomoki Matsukawa
  • Patent number: 10419084
    Abstract: A wireless communication device suppresses increase in computation scale when applying maximum likelihood detection to a multi-level modulation scheme. Units calculate a likelihood, bit log-likelihood ratio, and mutual information content for the separation result of a received signal on the basis of the signal point of a reference selected from among a plurality of signal points that a transmitted signal can assume. A transmission candidate point selection unit selects signal points in a number that corresponds to the mutual information content as transmission candidate points from among the plurality of signal points in ascending order of distance to 0 and distance to 1 for each modulation bit that constitutes the signal point of the reference. A reception candidate point that is a candidate for the received signal is calculated. An external LLR calculation unit calculates the bit log-likelihood ratio by an MLD method.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: September 17, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Kei Ito, Daiki Hoshi
  • Publication number: 20190267978
    Abstract: An RF generator includes: a modulation circuit outputting a pulsed RF signal; a variable attenuation circuit adjusting the level of the pulsed RF signal; an output power detecting unit detecting an output power value of the power output from the device; a first comparative arithmetic circuit outputting a first level control signal for controlling the level of the adjusted pulsed RF signal on the basis of a first detected voltage value and a set voltage value set in advance; a second comparative arithmetic circuit outputting a second level control signal for controlling the level of the adjusted pulsed RF signal on the basis of a second detected voltage value and the set voltage value; and a switching circuit switching between the value of the first level control signal and the value of the second level control signal depending on a switching timing setting value.
    Type: Application
    Filed: September 1, 2017
    Publication date: August 29, 2019
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: YOSHIYUKI OSHIDA, KENJI NASU, NAOYA FUJIMOTO
  • Patent number: 10389972
    Abstract: In a video signal transmission device, a camera control device includes: a compression unit for compressing a return video signal; a compression/expansion unit for compressing/expanding a prompter video signal; a frame synthesis unit for synthesizing the video signals; an encoding unit for encoding the synthesized video signal; and a modulation unit for modulating the encoded video signal and transmitting the modulated video signal to the camera adaptor. A camera adaptor includes: a demodulation unit for demodulating the video signal from the camera control device; a decoder unit for decoding the demodulated video signal; an expansion unit for separating one video signal from the decoded video signal, expanding the video signal, and restoring the video signal to the return video signal; and an expansion/compression unit for separating one video signal from the decoded video signal, compressing/expanding the video signal, and restoring the video signal to the prompter video signal.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: August 20, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Akihiro Kato
  • Patent number: 10382800
    Abstract: A video surveillance system includes surveillance cameras; a video converting and combining unit; an encoder for encoding a combined video from the video converting and combining unit; a decoder for decoding the combined video transmitted from the encoder; a video converting and splitting unit for splitting the combined video decoded by the decoder into the videos captured by the surveillance cameras; and a display device for displaying the videos inputted from the video converting and splitting unit. When combining the videos into one combined video, the video converting and combining unit appends assignment information in which each of the surveillance cameras, rotation information indicating application of a rotation process, and division information indicating whether the corresponding video is a left half video or a right half video are associated with one another. The video converting and splitting unit splits an HD video into SD videos based on the assignment information.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: August 13, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Tadamichi Kudo
  • Patent number: 10381706
    Abstract: A Wilkinson combiner includes: a plurality of splitting units that splits signals inputted from two ports; an isolating unit that connects one ends of the signals split at the plurality of splitting units to each other; and a combiner that connects other ends of the signals split at the plurality of splitting units to each other and outputs a combined signal. The isolating unit balun-connects the connected signals to each other using a balun circuit, short-circuits the balun-connected one end, and terminates the balun-connected other end using a terminator.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: August 13, 2019
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Yusaburo Goto, Keiichi Sakamaki