Patents by Inventor Hidehiro Toyoda

Hidehiro Toyoda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10700741
    Abstract: A correct commutation is realized even if a communication error occurs due to a change in an actuator drive current. An electronic control unit that includes a communication section outputting a control signal and that can transmit the control signal to an actuator connected to the electronic control unit via a power line, includes an actuator operation detection section. When the actuator operation detection section detects an actuator operation, the communication section retransmits the control signal at timing of detecting the actuator operation.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: June 30, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroki Yamashita, Taizo Yamawaki, Hidehiro Toyoda, Teppei Hirotsu, Ryosuke Ishida, Hirofumi Kurimoto, Kenichi Hoshino
  • Publication number: 20200059264
    Abstract: A correct commutation is realized even if a communication error occurs due to a change in an actuator drive current. An electronic control unit that includes a communication section outputting a control signal and that can transmit the control signal to an actuator connected to the electronic control unit via a power line, includes an actuator operation detection section. When the actuator operation detection section detects an actuator operation, the communication section retransmits the control signal at timing of detecting the actuator operation.
    Type: Application
    Filed: July 6, 2017
    Publication date: February 20, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroki YAMASHITA, Taizo YAMAWAKI, Hidehiro TOYODA, Teppei HIROTSU, Ryosuke ISHIDA, Hirofumi KURIMOTO, Kenichi HOSHINO
  • Publication number: 20180276527
    Abstract: In a processing method using a convolutional neural network, the neural network includes a convolution calculation unit that performs a convolution calculation by using a matrix vector product and a pooling calculation unit that performs a maximum value sampling calculation. A threshold value is set related to the matrix data for the convolution calculation, the matrix data is divided into a first and second halves based on the threshold value. The convolution calculation unit divides a first half convolution calculation by using the first half of the matrix data and a second half convolution calculation by using the second half of the matrix data into two and executes the calculations. The pooling calculation unit selects vector data to which the matrix vector product convolution calculation is to be performed in the second half convolution calculation, along with the maximum value sampling calculation.
    Type: Application
    Filed: February 1, 2018
    Publication date: September 27, 2018
    Inventors: Toru MOTOYA, Goichi ONO, Hidehiro TOYODA
  • Publication number: 20180247182
    Abstract: An information processing apparatus having an input device for receiving data, an operation unit for constituting a convolutional neural network for processing data, a storage area for storing data to be used by the operation unit and an output device for outputting a result of the processing. The convolutional neural network is provided with a first intermediate layer for performing a first processing including a first inner product operation and a second intermediate layer for performing a second processing including a second inner product operation, and is configured so that the bit width of first filter data for the first inner product operation and the bit width of second filter data for the second inner product operation are different from each other.
    Type: Application
    Filed: January 26, 2018
    Publication date: August 30, 2018
    Inventors: Toru MOTOYA, Goichi ONO, Hidehiro TOYODA
  • Patent number: 9521095
    Abstract: It is provided a transport apparatus including: a port information management unit for obtaining port information which includes a type first interfaces, a transport rate of first interfaces, and a physical lane count from the first interfaces into the transport apparatus, and for determining, based on the obtained port information, a virtual lane count into which the physical lanes from the first interfaces are converted; virtual lane creating units for setting as many virtual lanes as the determined virtual lane count; a lane information creating unit for creating, based on the port information, lane information which associates the first interfaces, the physical lane count, and identification information of virtual lanes in association with the physical lanes; and a multiplexing unit for multiplexing data that is transported along the virtual lanes, and for inserting the lane information in an invalid data field which is generated when the data is multiplexed.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: December 13, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Kono, Satoshi Tsutsumi, Hidehiro Toyoda
  • Patent number: 9521092
    Abstract: A transport system comprises 2 apparatuses. The first transport apparatus notifies, for each of first physical ports, to the second transport apparatus, a valid first lane count and identification information of the first physical port. The second transport apparatus is configured to: obtain, for each of second physical ports, a valid second lane count and identification information of the second physical port; associate, based on the valid second lane count and the identification information of the second physical port, and the valid first lane count and the identification information of the first physical port, the identification information of the first and second physical port; and transmit, when data including identification information of one of the first physical ports is transmitted, the data from the second physical port that is identified by the identification information associated with the identification information of the one of the first physical ports.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: December 13, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Kono, Hidehiro Toyoda, Satoshi Tsutsumi
  • Patent number: 9225424
    Abstract: In a PON system in which plural kinds of modulation schemes coexist, when uplink burst signals from respective ONUs are received, the receiving efficiency degrades as the number of the times of switching of the modulation scheme increases. In an optical access (PON) system supporting plural kinds of modulation schemes, an OLT allocates bandwidths for uplink signals, i.e., transmission timings each including a transmission start time and a transmission duration, to ONUs, respectively, such that the bandwidths allocated to plural ONUs for the same modulation scheme are as successive as possible. Based on the transmission timings allocated to the respective ONUs, the OLT switches the modulation scheme of a modulation-scheme variable burst-mode optical transmitter/receiver by control of a modulation scheme controller.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: December 29, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Odaka, Jun Sugawa, Hidehiro Toyoda
  • Patent number: 9160646
    Abstract: A transmitter of a data transmission system using n transmission lanes generates an error code such as an error detection code or an error correction code from transmitted data on x transmission lanes input to an error detection/correction code generating unit, and transmits the same to a lane number switching controlling unit. The lane number switching controlling unit distributes the transmitted data and the error code to at least some of the n transmission lanes as data strings based on lane information indicating a normal lane, a failure lane, or a lane with a sign of a failure received from a receiver. Further, markers including the lane information indicating a normal or failure lane and information to detect a failure of the n transmission lanes are generated and inserted into data strings transmitted on the n transmission lanes, so that communications are performed with the receiver.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: October 13, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Kono, Hidehiro Toyoda
  • Patent number: 9154220
    Abstract: A highly reliable optical switching device and optical switching method ensure restoration of the failure in the large-capacity high density wiring of the multicore fiber with the general number of cores (7 cores, 19 cores and the like). An optical transmission system which transmits a supervisory control signal concerning a transmission path switching to one or more cores of a single or multiple multicore fibers, an active signal to one or more cores, and a standby signal to one or more cores includes optical switching devices connected to respective ends of the optical transmission system. Upon detection of the transmission failure of the active signal based on the signal transmission condition and information from the supervisory control signal, it is switched to the standby signal. The supervisory control signal is transmitted to the center core of the multicore fiber.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: October 6, 2015
    Assignee: HITACHI, LTD.
    Inventors: Toshiki Sugawara, Hidehiro Toyoda, Kenichi Tanaka
  • Publication number: 20150281129
    Abstract: It is provided a transport apparatus including: a port information management unit for obtaining port information which includes a type first interfaces, a transport rate of first interfaces, and a physical lane count from the first interfaces into the transport apparatus, and for determining, based on the obtained port information, a virtual lane count into which the physical lanes from the first interfaces are converted; virtual lane creating units for setting as many virtual lanes as the determined virtual lane count; a lane information creating unit for creating, based on the port information, lane information which associates the first interfaces, the physical lane count, and identification information of virtual lanes in association with the physical lanes; and a multiplexing unit for multiplexing data that is transported along the virtual lanes, and for inserting the lane information in an invalid data field which is generated when the data is multiplexed.
    Type: Application
    Filed: March 6, 2015
    Publication date: October 1, 2015
    Inventors: Masashi Kono, Satoshi Tsutsumi, Hidehiro Toyoda
  • Patent number: 9143420
    Abstract: A receiver includes a data unit decomposer for receiving data units transmitted via a transmission channel and extracting user data including invalid data and valid data by removing management data from the received data units, and a plurality of rate estimators for receiving data forwarded by the data unit decomposer and outputting the data to different output interfaces. Each rate estimator selects valid data from the user data forwarded by the data unit decomposer, inputs the selected valid data to a FIFO unit, controls read frequency of the FIFO unit based on an amount of remaining data in the FIFO unit, and estimates a transmission data rate of an associated input interface in the transmitter based on at least one of a write cycle in writing the valid data to the FIFO unit and the amount of remaining data in the FIFO unit.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: September 22, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Kono, Hidehiro Toyoda
  • Publication number: 20150085877
    Abstract: A transport system comprises 2 apparatuses. The first transport apparatus notifies, for each of first physical ports, to the second transport apparatus, a valid first lane count and identification information of the first physical port. The second transport apparatus is configured to: obtain, for each of second physical ports, a valid second lane count and identification information of the second physical port; associate, based on the valid second lane count and the identification information of the second physical port, and the valid first lane count and the identification information of the first physical port, the identification information of the first and second physical port; and transmit, when data including identification information of one of the first physical ports is transmitted, the data from the second physical port that is identified by the identification information associated with the identification information of the one of the first physical ports.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 26, 2015
    Inventors: Masashi KONO, Hidehiro TOYODA, Satoshi TSUTSUMI
  • Patent number: 8965206
    Abstract: An aspect of this invention is a network system including subscriber apparatuses and a station-side apparatus for communicating with the subscriber apparatuses. The station-side apparatus communicates with the subscriber apparatuses using wavelengths. The station-side apparatus determines a wavelength to be used by each of at least one subscriber apparatus of the subscriber apparatuses based on effective transmission rates used by the subscriber apparatuses in communications with the station-side apparatus.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: February 24, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Jun Sugawa, Toshiyuki Odaka, Hidehiro Toyoda
  • Patent number: 8855148
    Abstract: Digital signals having respective pieces of frequency information different from each other are bundled, and transmitted at high speed. On receiving side, digital signals retaining the respective pieces of frequency information are recovered and separated. Transmitter apparatus divides pieces of transmission data that have the different pieces of frequency information and correspond to respective input channels into data blocks having a fixed length, as valid data, and subsequently multiplexes the data blocks corresponding to the respective input channels and outputs the multiplexed data to a transmission path. A receiver apparatus divides data string received into data flows and subsequently restores the transmission data, from the data blocks consecutive in each data flow and stores the restored data, and outputs transmission data corresponding to the respective data flows in synchronization with clocks generated for these data flows.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 7, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Hidehiro Toyoda, Masashi Kono
  • Publication number: 20140293826
    Abstract: A receiver includes a data unit decomposer for receiving data units transmitted via a transmission channel and extracting user data including invalid data and valid data by removing management data from the received data units, and a plurality of rate estimators for receiving data forwarded by the data unit decomposer and outputting the data to different output interfaces. Each rate estimator selects valid data from the user data forwarded by the data unit decomposer, inputs the selected valid data to a FIFO unit, controls read frequency of the FIFO unit based on an amount of remaining data in the FIFO unit, and estimates a transmission data rate of an associated input interface in the transmitter based on at least one of a write cycle in writing the valid data to the FIFO unit and the amount of remaining data in the FIFO unit.
    Type: Application
    Filed: December 13, 2013
    Publication date: October 2, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Masashi KONO, Hidehiro TOYODA
  • Publication number: 20140294388
    Abstract: In a PON system in which plural kinds of modulation schemes coexist, when uplink burst signals from respective ONUs are received, the receiving efficiency degrades as the number of the times of switching of the modulation scheme increases. In an optical access (PON) system supporting plural kinds of modulation schemes, an OLT allocates bandwidths for uplink signals, i.e., transmission timings each including a transmission start time and a transmission duration, to ONUs, respectively, such that the bandwidths allocated to plural ONUs for the same modulation scheme are as successive as possible. Based on the transmission timings allocated to the respective ONUs, the OLT switches the modulation scheme of a modulation-scheme variable burst-mode optical transmitter/receiver by control of a modulation scheme controller.
    Type: Application
    Filed: October 29, 2013
    Publication date: October 2, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Toshiyuki ODAKA, Jun SUGAWA, Hidehiro TOYODA
  • Publication number: 20140241712
    Abstract: A highly reliable optical switching device and optical switching method ensure restoration of the failure in the large-capacity high density wiring of the multicore fiber with the general number of cores (7 cores, 19 cores and the like). An optical transmission system which transmits a supervisory control signal concerning a transmission path switching to one or more cores of a single or multiple multicore fibers, an active signal to one or more cores, and a standby signal to one or more cores includes optical switching devices connected to respective ends of the optical transmission system. Upon detection of the transmission failure of the active signal based on the signal transmission condition and information from the supervisory control signal, it is switched to the standby signal. The supervisory control signal is transmitted to the center core of the multicore fiber.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 28, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Toshiki SUGAWARA, Hidehiro TOYODA, Kenichi TANAKA
  • Publication number: 20140161456
    Abstract: An aspect of this invention is a network system including subscriber apparatuses and a station-side apparatus for communicating with the subscriber apparatuses. The station-side apparatus communicates with the subscriber apparatuses using wavelengths. The station-side apparatus determines a wavelength to be used by each of at least one subscriber apparatus of the subscriber apparatuses based on effective transmission rates used by the subscriber apparatuses in communications with the station-side apparatus.
    Type: Application
    Filed: March 4, 2013
    Publication date: June 12, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Jun SUGAWA, Toshiyuki ODAKA, Hidehiro TOYODA
  • Publication number: 20130283108
    Abstract: A transmitter of a data transmission system using n transmission lanes generates an error code such as an error detection code or an error correction code from transmitted data on x transmission lanes input to an error detection/correction code generating unit, and transmits the same to a lane number switching controlling unit. The lane number switching controlling unit distributes the transmitted data and the error code to at least some of the n transmission lanes as data strings based on lane information indicating a normal lane, a failure lane, or a lane with a sign of a failure received from a receiver. Further, markers including the lane information indicating a normal or failure lane and information to detect a failure of the n transmission lanes are generated and inserted into data strings transmitted on the n transmission lanes, so that communications are performed with the receiver.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 24, 2013
    Applicant: HITACHI, LTD.
    Inventors: Masashi KONO, Hidehiro TOYODA
  • Patent number: 8498204
    Abstract: It is provided a data transmission system comprising a transmitter, a repeater and a receiver. The transmitter and the repeater are coupled through a first transmission path and the receiver and the repeater are coupled through a second transmission path. The transmitter, the repeater and the receiver have virtual lanes. The transmitter demultiplexes the transmission data into as many data streams as a number of useable virtual lanes based on useable lane information. The repeater monitors failures of the transmission lanes of the first transmission path and the virtual lanes. The receiver monitors failures of the transmission lanes of the second transmission path and the virtual lanes, selects the useable virtual lanes, sends to the transmitter the useable lane information, corrects a wrong order of the received data streams and a shift of reception point in the virtual lanes, and restores the demultiplexed data streams into the transmission data.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: July 30, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Hidehiro Toyoda, Shinji Murai