Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Alaxala Networks Corporation

Opnext Japan, Inc.

Hidehiro Toyoda

Masashi Kono

Hiroki Yamashita

Norihiko Moriwaki

Masayuki Takase

Toshiyuki Odaka

Jun Sugawa

Satoshi Tsutsumi

Shinji Nishimura

Taizo Yamawaki

Kenichi Tanaka

Tatsuya Saito

Shinya Sasaki

Toshiki Sugawara

Teppei Hirotsu

Norio Chujo

Goichi Ono

Takayuki Muranaka

Koji Fukuda

Kenro Sekine

Ryosuke Ishida

Hirofumi Kurimoto

Shinji Murai

Kenichi Hoshino

Toru Motoya

Naohisa Koie

Takeshi Matsumoto

Hiroaki Nishi

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.

Information processing apparatus, image recognition apparatus, and parameter setting method for convolutional neural network

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.

Electronic control apparatus provided with power line communication function, actuator, electronic control system, and automobile using same

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.

Transport system and transport apparatus

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.

Transport system and transport method

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.

Dynamic bandwidth allocation method, OLT, and PON system

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.

Data transmission system and data transmission device

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.

Large-capacity fiber optical switching device and optical transmission system

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.

Data transport system, receiver and transmitter

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.

Network system, station-side apparatus, and method of controlling communications

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.

Multiplexing transmission system, receiver apparatus and module, transmitter apparatus for multiplexing transmission

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.

Transmission system, repeater and receiver

A transmitter communicates with a receiver and an error corrector corrects bit errors generated during data transmission. The transmitter has a scrambler unit that scrambles data so that a running disparity of 0 and 1 in the input data is substantially zero. A bit-string converting unitthat adds bit data for ensuring a maximum run length of a serial bit string of the scrambled data and converts control information to bit data of a fixed value. A synchronization timing generating unitdivides the transmitted data by a constant interval and converts the transmission data to a data block. A bit-string converting unit extracts a fixed-value bit pattern of the control data from the bit string of the data block, converts the bit pattern to the control information, and discriminates the data and the control information. A descrambler unit reconverts the data-scrambled data to the data before scrambling.

Data transmission equipment and generating method for transmission code

A data transmission system comprising a transmitter and a receiver. The transmitter comprises a phase encoder for partitioning consecutive bit data to be input in data in units of X bits; and converting a 2value indicated by the data of X bits in unique association with an (N/2&#x2212;1)value of a Y symbol, and for confining use of signal points, from among the signal points of N-ary phase, only to a signal point P(at a phase angle 0) and N/2&#x2212;2 signal points P(+2) (where 1&#x2266;n&#x3c;N/2&#x2212;2). The receiver comprises a phase decoder for notifying an error detection when a signal point other than a signal point that are permitted to be used is received, and performing an error correction by changing the signal point to a signal point which has a smaller hamming distance.

Data transmission system and transmission code generating method for the same

In pulse width control equalization, attention is paid to the existence of the symmetry of anteroposterior signals and thereby the size of a table in which the adjustment amount of an edge position is stored is reduced to the power of one-half. Pattern jitters caused by inter-symbol interference are suppressed. The pulse time span of each symbol is adjusted to an optimum pulse width determined by a calculating formula or search in a table in response to a code sequence to be transmitted. In the configuration wherein a table is used, the table to store an edge position adjustment amount wherein the row of the exclusive OR of two symbols located at positions symmetrical to each other before and after a center symbol now ready to be sent in the code sequence is used as a search key is made.

Pulse amplitude modulation circuit with pulse width equalization

A transmitting and receiving technique in which a load on data signal lines is reduced while maintaining a communication quality, thereby making it possible to improve the throughput of data channels. In a transceiver, a transmitter side has an encoder circuit that transmits a bit sequence obtained by encoding link information to a clock signal line, and a receiver side has a clock and data recovery circuitthat extracts a clock component from a signal received from the clock signal line, a decoder circuitthat decodes the extracted signal to reproduce the link information, and a bit deskew circuitthat adjusts a skew that is lower than one bit on the basis of a clock component.

Growing community of inventors

Tokyo, Japan

Hidehiro Toyoda