| OKI ELECTRIC INDUSTRY CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120116724 | SENSOR DATA TRANSMISSION FREQUENCY CONTROLLER USING SENSOR SITUATION INFORMATION - A transmission frequency controller includes situation information storage and a transmission frequency changing director. The storage stores respective situation information of sensors, which information clarifies the association of cooperating sensor with a subject detecting sensor. The director refers to the situation information in accordance with the subject detecting data from the subject detecting sensor to confirm the cooperating sensors cooperating with the subject detecting sensor and directs change of a data transmission frequency to the subject detecting sensor and the cooperating sensors. Thus, it is possible to acquire only the needed sensor data and decrease the traffic on the entire network. | 05-10-2012 |
| 20120108286 | Wireless Communication Apparatus, Wireless Communication System and Transmitting Power Control Method - A wireless communication apparatus having a plurality of neighboring wireless communication apparatuses may includes a wireless transmitter, an information control storage member, and a transmitting power calculator. A wireless transmitter may transmit a wireless signal with a transmitting power to a destination wireless communication apparatus. An information control storage member may maintain first information of links between the wireless communication apparatus and the plurality of neighboring wireless communication apparatuses, and second information of a communication route between the wireless communication apparatus and the destination wireless communication apparatus. A transmitting power calculator may calculate the transmitting power based on the first and second information, so as to ensure reception of the wireless signal. | 05-03-2012 |
| 20120106379 | NETWORK MONITORING APPARATUS FOR MANAGING COMMUNICATION QUALITY AND A METHOD THEREFOR - In a communication quality monitoring apparatus, a learning estimator uses collected network information and operational expressions for service quality to update the expressions based on a difference between an estimation of the quality and service quality information to learn the relationship between the loads and the quality. Based on the service quality information, a determiner determines whether or not the quality is lower than a predetermined value. When the quality is determined lower than the predetermined value, a control selector generates candidate information based on the network information and network configuration information, and determines, before control, whether or not the service quality estimation obtained from this candidate information and the operational expression exceeds the predetermined value. Apiece of candidate information determined as exceeding this value is selected. Based on control contents in the candidate information, a network controller controls the network devices. | 05-03-2012 |
| 20120097700 | MEDIUM PROCESSING APPARATUS - A bill processing apparatus is provided that can reduce the frequency of occurrences of removal of a leaf shaped medium (dispensed bill) being forgotten. Processing a medium handover port where a leaf shaped medium is handed over, and a medium handover port mechanism provided at the medium handover port and successively raising and lowering the leaf shaped medium, fed out from inside the machine (the automated teller machine), inside the medium handover port. The medium handover port mechanism notifies a user of the position of the leaf shaped medium with a visible action by successively raising and lowering the leaf shaped medium inside the medium handover port. | 04-26-2012 |
| 20120089842 | COMMUNICATION SYSTEM FOR AUTHENTICATING MESSAGES WITH UNIQUELY SPECIFIED GENUINE INFORMATION - In a sensor network system, a transmitter device uses a message authentication key generated by a message generator to transmit a message with authenticator to plural receiver devices, which in reply produce a certification by a certification generator from a message with authenticator held by a message holder to transmit the certification to the transmitter device. An information generator of the transmitter device uses an identification from a reception checker and the message authentication key thus generated to generate an authentication key notification, which will be transmitted to receiver devices having transmitted the certification. In the receiver devices, the message holder holds the authentication key notification, from which an authentication key acquirer acquires the message authentication key, which a message authenticator uses to compare the message with authenticator generated with the message with authenticator held in the message holder to confirm the received message. | 04-12-2012 |
| 20120082065 | WIRELESS NETWORK AND TERMINAL, AND NETWORK CONFIGURATION METHOD AND DEVICE - A tree topology in a multi-hop wireless network is configured by having each node other than the root node select a parent node within direct communication range, thereby becoming a child node of the selected parent node. Neighboring nodes provide selection values such as routing costs and local structural information indicating the existing topology in their vicinities, including parent-child relationships. The selection of the parent node is based on the received selection values, but the local structural information is used to bias the selection in favor of neighboring nodes with at least one other child node. This selection strategy reduces the number of parent nodes in the network and enables more nodes to operate as end nodes, which can then conserve power by carrying out sleep control. | 04-05-2012 |
| 20120057882 | CARRIER-SUPPRESSED OPTICAL PULSE TRAIN GENERATING DEVICE - The device is structured to have a first electric modulation signal generator, a second electric modulation signal generator, a two-mode beat light source and an optical intensity modulator. The first electric modulation signal generator generates and outputs a first electric modulation signal. The second electric modulation signal generator generates and outputs a second electric modulation signal of a same frequency as the first electric modulation signal and to which a phase difference of δ radians is provided (δ is a real number satisfying 0≦δ≦π). The two-mode beat light source is driven by the first electric modulation signal, and generates and outputs two-mode beat light. The two-mode beat light is inputted to the optical intensity modulator, and the optical intensity modulator generates and outputs a CS optical pulse train. Light transmittance of the optical intensity modulator is modulated by the second electric modulation signal. | 03-08-2012 |
| 20120013235 | SLIDE RAIL STRUCTURE - A slide rail structure configured to mount a unit in a chassis, includes a first side slide rail including a first chassis-engaging slide member having a first side L-shaped projection portion projecting outward of a side of the first chassis-engaging slide member, and a first unit-engaging slide member slidably coupled to the first chassis-engaging slide member and configured to hold to one side of the unit. A second side slide rail includes a second chassis-engaging slide member having a second side L-shaped projection portion projecting outward of a side of the second chassis-engaging slide member, and a second unit-engaging slide member slidably coupled to the second chassis-engaging slide member and configured to hold to another side of the unit. The chassis has a first fitting hole in one side thereof, the first fitting hole being configured to receive the first side L-shaped projection portion so as to fix the first chassis-engaging slide member to said side of the chassis, and has a second fitting hole in an opposite side of the chassis, the second fitting hole being configured to receive the second side L-shaped projection portion so as to fix the second chassis-engaging slide member to the opposite side of the chassis. | 01-19-2012 |
| 20120011381 | INFORMATION TRANSMISSION DEVICE, SYSTEM, AND METHOD - A network includes nodes that transmit information to each other. Some nodes operate intermittently; other nodes operate continuously. Information is transmitted to an intermittently operating node by a handshaking protocol in which the intermittently operating node indicates that it is ready to receive. Information is transmitted to a continuously operating node without such handshaking, thereby saving time and power. Each transmitting node has a memory storing information indicating which other nodes require handshaking. | 01-12-2012 |
| 20120002924 | STAR COUPLER AND OPTICAL MULTIPLEXER/DEMULTIPLEXER - A star coupler includes a core embedded in a clad on a major surface of a substrate. The refractive index of the core differs by at least 40% from the refractive index of the clad. The core includes a slab optical waveguide, at least one input-output optical waveguide connected to the slab optical waveguide, and an array of channel optical waveguides connected to the slab optical waveguide. The star coupler also includes a high-index layer having a refractive index intermediate between the refractive indexes of the clad and core, covering the sides of the core orthogonal to the major surface of the substrate. The high-index layer reduces light loss. | 01-05-2012 |
| 20120002922 | OPTICAL MULTIPLEXER/DEMULTIPLEXER - A polarization-independent optical multiplexer/demultiplexer with wide passbands has a core including an input optical waveguide, an input slab optical waveguide connected to the input optical waveguide, a waveguide array connected to the input slab optical waveguide, an output slab optical waveguide connected to the waveguide array, a pair of multimode couplers connected to the output slab optical waveguide, and a pair of output optical waveguides connected to the multimode couplers. The multimode couplers are dimensioned so that as both TE and TM polarized light propagates through them, the phase difference between the fundamental and second-order modes changes by an odd multiple of pi radians. | 01-05-2012 |
| 20110282913 | DIALOGUE CONTROL SYSTEM, METHOD AND COMPUTER READABLE STORAGE MEDIUM, AND MULTIDIMENSIONAL ONTOLOGY PROCESSING SYSTEM, METHOD AND COMPUTER READABLE STORAGE MEDIUM - A dialogue control system that uses an ontology that systematically expresses domain knowledge representing concepts and relationships between concepts to determine questions for a user and implements the questions, and implements a dialogue in accordance with received user answers. One or more dimension-classified ontologies and a basic ontology are stored, a concept from a user response is specified as a condition, and one or a plural number of the dimension-classified ontologies that meet the specified condition are fetched. The content of the fetched dimension-classified ontology/ies is overwritten on the basic ontology, in order according to dimension priorities from the dimension-classified ontology with the lowest dimension priority, and a multidimensional ontology is generated. The dialogue control system uses this multidimensional ontology to control the dialogue. | 11-17-2011 |
| 20110260024 | STRUCTURE FOR POSITIONING OPERATING UNIT - A positioning structure, which fixes an operating unit ( | 10-27-2011 |
| 20110258522 | Encoding apparatus, decoding apparatus, and encoding and decoding system - An encoding apparatus derives a bit order based on a puncturing table that specifies different puncturing patterns for different transmission rates. The encoding apparatus then generates an error correcting code from an input information bit string and rearranges the error correcting code in the derived bit order. The error correcting code is punctured by taking a number of consecutive bits from the rearranged error correcting code. The number of bits taken varies depending on the transmission rate. The punctured error correcting code is output to a decoding apparatus, which realigns the code bits according to the transmission rate and the puncturing table, then uses the realigned error correcting code to correct errors in erroneous data. Rearrangement of the error correcting code makes the puncturing process more efficient by avoiding the need to decide whether to take or discard each bit individually. | 10-20-2011 |
| 20110249612 | Wireless communication system preventing traffic from being relayed concentratively onto a specific node - In a wireless communication network system performing multi-hop wireless communications, a network node has a calculator for exchanging control packets with its neighboring nodes to calculate link cost values, another calculator for calculating path costs incurred on the way to a network node of interest, a manager for managing the number of downstream nodes subsidiary to each daughter node, and a downstream node adjuster for adjusting the number of the downstream nodes subsidiary to each daughter node. The adjuster produces control information, into which link cost and/or path cost information is inserted. The adjuster adjusts the contents of the link cost or path cost information, to be inserted into the produced control information, according to the numbers of the downstream nodes subsidiary to the daughter nodes. | 10-13-2011 |
| 20110243560 | Passive optical communication network system extendable with codec modules - In a passive optical communication network system, an optical signal OCDM-coded is transmitted from an OLT to a first port of a circulator, which in turn transfers the signal from its second port to one end of a first SSFBG. The first SSFBG then decodes the signal of one channel to output the decoded signal from its one end to the second port of the circulator, which in turn transmits the decoded signal from its third port to an ONU. When the ONU transmits an optical signal to the third port of the circulator, the circulator transfers the signal from its fourth port to one end of a second SSFBG, which in turn encodes the signal to output the encoded signal from its one end to the fourth port of the circulator. The circulator then transmits the encoded signal from its first port to the OLT. | 10-06-2011 |
| 20110235915 | Apparatus for sensing user condition to assist handwritten entry and a method therefor - In an entry assistance apparatus, when the user makes handwritten entry on a medium, a detector detects person condition information on a condition regarding the body of the user. The person condition information may include either or both of positional information on the position of the user and postural information on the posture of the user. Based on the person condition information, a condition estimator estimates one or more conditions of the user. Based on the condition of the user, a presentation information selector selects presentation information on one or more information contents to be presented to the user. The information content indicated by the presentation information will be presented to the user by an information presenter. | 09-29-2011 |
| 20110235504 | Wireless communication system and nodes - A wireless communication system includes a first node, multiple second nodes, and multiple third nodes that communicate with the first node through the second nodes. The second and third nodes transmit control information to their neighboring third nodes, which calculate link costs from the reception status of the control information. The control information transmitted by each node includes a path cost indicating the cost of a path between the transmitting node and the first node. From the path costs in received control information, each third node selects a second node through which to communicate with the first node, and selects a parent node as the destination of the first hop on the path through the selected second node to the first node. Routing is thereby accomplished autonomously without having the second nodes flood the system with routing requests. | 09-29-2011 |
| 20110199911 | Network fault detection system - A network fault detection system includes a parameter extractor and a fault classifier. The extractor extracts a parameter value of a parameter for use in a classification feature vector from a packet received from a network. The parameter value relates to at least one of a first value for a first parameter associated with loss of packets, a second value for a second parameter associated with jitter among packets, and a third value for a third parameter associated with a characteristic of the occurrence of the loss of packets. The classifier determines whether or not a fault has occurred in the network and classifies the fault by type, based on numerical conditions and the parameter value. | 08-18-2011 |
| 20110198192 | MEDIUM PROCESSING APPARATUS - When a bill-jam occurs in a bill dispenser, the jammed bill or the subsequent bill is easily removed. | 08-18-2011 |
| 20110189826 | Method of manufacturing field effect transistor having Ohmic electrode in a recess - The contact resistance between an Ohmic electrode and an electron transit layer is reduced compared with a case in which the Ohmic electrode is provided to a depth less than the heterointerface. As a result, for an Ohmic electrode provided in a structure comprising an electron transit layer formed of a first semiconductor layer formed on a substrate, an electron supply layer comprising a second semiconductor layer forming a heterojunction with the electron transit layer and having a smaller electron affinity than the first semiconductor layer, and a two-dimensional electron layer induced in the electron transit layer in the vicinity of the heterointerface, the end portion of the Ohmic electrode is positioned in the electron transit layer in penetration into the electron supply layer at a depth equal to or greater than the heterointerface. | 08-04-2011 |
| 20110188654 | Communication terminal using a temporary network key for assembling a secure communication frame - A communication terminal generates a temporary network key based on a managed master network key and on key identification used for security processing on a communication frame. The security processing is performed on the communication frame using the temporary network key. A secure communication frame is produced in which the identification of the key is indicated. | 08-04-2011 |
| 20110188653 | Communication system and device - A communication device receives secure communication frames on which a security transform has been performed to permit authentication. The communication device maintains an authentication history and a local time varying parameter. In multi-hop communication, the communication device provisionally verifies the freshness of a received secure communication frame by verifying that identifying information extracted from the frame is not already present in the authentication history and that a received time varying parameter extracted from the frame is not older than the local time varying parameter by more than a certain margin. If these freshness tests both pass, the frame is authenticated. If authentication succeeds, the frame is transmitted on the next hop without performance of a new security transform. | 08-04-2011 |
| 20110185052 | COMMUNICATION CONTROL APPARATUS FOR CONTROLLING QoS ACCORDING TO APPLICATIONS AND NETWORK STATE - In a communication control apparatus controlling communications between terminals and network devices, the terminal communication optimizer includes a first acquiring section for acquiring first information indicating applications running on the terminal and their destinations, and a setting section for setting QoS for each application according to second information indicating an instruction. The communication optimizer includes a second acquiring section for acquiring third information indicating the QoS requisite for each application indicated by the first information and fourth information about the state of the network, a deciding section for deciding whether or not there are network resources requisite for the applications indicated by the first information, and a communication instructing section for performing communications, when the network resources are insufficient, with higher communication priority applications communicating at a first QoS and lower communication priority applications communicating within the limit not deteriorating the first QoS. | 07-28-2011 |
| 20110182549 | SPOT-SIZE CONVERTER - A spot-size converter is equipped with a substrate, a clad that is formed on the substrate, a core that is embedded inside the clad, and an input/output end face. The core is tapered toward the input/output end face along a light propagation direction. In the clad, groove portions that expose a substrate face are formed extending as far as the input/output end face and on both sides of the core along the light propagation direction. | 07-28-2011 |
| 20110181943 | Wavelength conversion device and wavelength conversion method - A first wavelength converter of a wavelength-conversion device includes: an optical amplifier amplifying an incident light beam; a first dispersion flat fiber spreading the wavelength spectrum width of the amplified beam; and a first wavelength filter transmitting a predetermined wavelength bandwidth of the first fiber output beam. A center wavelength of the first wavelength converted beam is shifted by Δλ | 07-28-2011 |
| 20110168537 | KEY SWITCH STRUCTURE - A key switch structure capable of reducing the height of a key switch, reducing the number of components, and reducing manufacturing costs. | 07-14-2011 |
| 20110163493 | MEDIA SEPARATOR AND METHOD - To provide a media separator including a lumped-media conveyer mechanism which receives lumped media to convey the lumped media in a predetermined direction, and a picker roller which separates the lumped media conveyed by the lumped-media conveyer mechanism, the lumped-media conveyer mechanism including an auxiliary conveyer body for conveying the lumped media to the picker roller. That makes it possible to reliably separate and send out the lumped media, when having shorter media mixed, and to achieve downsizing of the media separator. | 07-07-2011 |
| 20110162948 | KEY SWITCH STRUCTURE - Provided is a key switch structure wherein a membrane sheet ( | 07-07-2011 |
| 20110155551 | KEYBOARD STRUCTURE - There is provided a keyboard structure capable of preventing a fingernail of a user from being inserted between key tops and achieving uniform illumination without illumination leakage. A key top body portion ( | 06-30-2011 |
| 20110155540 | BANKNOTE DEPOSITING AND DISPENSING MACHINE - When depositing processing is performed, a banknote guide section and a bill press are separated from each other such that a banknote accommodation space formed between the banknote guide section and the bill press is positioned below a banknote depositing and dispensing port, a upper guide section is moved towards a pickup roller side and a input port shutter is opened. After the input port shutter has been closed, the upper guide section is moved towards a bill press side, and by moving the banknote guide section and the bill press towards the pickup roller side, the pickup roller, which is projected out into the accommodation space through a cutout in the banknote guide section, and which makes contact with the banknote, feeds the banknote out towards a conveying path. | 06-30-2011 |
| 20110155536 | MEDIUM PROCESSING DEVICE - The conveying path of an automated teller machine is shortened such that banknote jams are suppressed from occurring. The automated teller machine includes a customer interface section | 06-30-2011 |
| 20110154922 | BI-DIRECTIONAL ROTARY ACTUATOR - A bi-directional rotary actuator causing the output shaft thereof to output two or more kinds of bi-directional and rotational driving forces. A bi-directional rotary actuator includes a rotary solenoid ( | 06-30-2011 |
| 20110150482 | Transmission control system, subscriber-side communication device, and office-side communication device - Provided is a subscriber-side communication device including a subscriber-side processing unit that continuously performs signal processing regardless of computer restart and includes a transmission processing unit that performs a data transmission process according to transmission control information contained in a received signal from the office-side communication device. Also provided is an office-side communication device including an office-side processing unit that continuously performs signal processing regardless of computer restart, and a transmission control information computing unit that computes transmission control information for each subscriber-side communication device, the office-side processing unit including a transmission control information storing unit that stores transmission control information of each subscriber-side communication device computed by the transmission control information computing unit, and a transmission control processing unit that performs a transmission control process with each subscriber-side communication device by using the transmission control information of each subscriber-side communication device stored in the transmission control information storing unit. | 06-23-2011 |
| 20110150067 | Echo canceller for eliminating echo without being affected by noise - In an echo canceller, a specific frequency component eliminator eliminates a specific frequency component of a specific frequency from a receiver signal to output a resultant signal to an echo path. A specific frequency component detector detects a frequency component of the same frequency as the specific frequency eliminated by the specific frequency component eliminator from the transmitter signal. A noise calculator finds noise power on the basis of power of the specific frequency component detected by the specific frequency component detector, and finds total power including noise and an echo component on the basis of power of a frequency component including the echo component. A control parameter calculator uses the noise power and the total power found by the noise calculator to find a control parameter of the echo canceller. | 06-23-2011 |
| 20110142252 | Source sound separator with spectrum analysis through linear combination and method therefor - In a source sound separator, first and second target sound predominant spectra are generated respectively by first and second processing operations for linear combination for emphasizing the target sound, using received sound signals of two microphones arrayed at a distance from each other. A target sound suppressed spectrum is generated by processing for linear combination for suppression of the target sound, using the two received sound signals. Further, a phase signal containing a larger amount of signal components of the target sound and exhibiting directivity in the direction of the target sound is generated by processing of linear combination, using the two received sound signals. The target sound and the interfering sound are separated from each other using the first and second target sound predominant spectra, the target sound suppressed spectrum, and the phase signal. | 06-16-2011 |
| 20110135076 | LINKAGE SYSTEM, LINKAGE METHOD, COMPUTER READABLE RECORDING MEDIUM STORING LINKAGE PROGRAM, AND EXCHANGE - A linkage system for linking a soft phone incorporated in an exchange and a hard phone not incorporated in the exchange, and informing the state of the linkage operation. The linkage system allows an exchange which incorporates the soft phone terminal having a telephone function to link the soft phone terminal and the hard phone not incorporated in the exchange and establishes communication between the hard phone and the call destination. The system includes a linkage information registering section for registering the soft phone terminal number received from the soft phone terminal which is the caller and linkage terminal information about the hard phone to be linked, a call processing section for making a call to the hard phone according to the linkage terminal information about the hard phone, a calling section for calling the call destination received from the soft phone when receiving a call arrival response from the hard phone, and a path setting section for setting a communication path between the hard phone and the call destination when receiving a response from the call destination. | 06-09-2011 |
| 20110133389 | MEDIA PROCESSOR - A media processor is provided with includes a conveyance channel over which a paper sheet-like medium is conveyed, and an accumulation mechanism which accumulates the medium sent from the conveyance channel, the accumulation mechanism including a guide member for guiding and accumulating the medium sent from the conveyance channel and a conveyor for catching the medium guided by the guide member against the guide member to draw the medium onto the guide member. It is thus possible to shorten times required for the preparing operation to accumulate bills and for the bill accumulating operation, and further to prevent mechanical malfunction such as bill jamming from occurring. | 06-09-2011 |
| 20110133388 | MEDIUM CONVEYANCE MECHANISM (DEVICE) - Aligning of banknotes is carried out without using an aligning device. A medium conveyance mechanism includes an upper belt ( | 06-09-2011 |
| 20110116397 | Communication path control apparatus for evenly distributing packets between adjacent nodes and a method therefor - In a packet transfer network node, the receiving ratio of first packets transmitted from its adjacent node is calculated to represent a proportion of the number of the first packets received from each adjacent node to the total number of those packets received from all adjacent nodes. Based on the receiving ratio calculated for a combination of a source and a destination corresponding to the destination and source of the second packets, respectively, the transmitting ratio of second packets is calculated for each adjacent node to define a proportion in which the second packets transmitted from a source corresponding to the destination of the first packets and meant for a destination corresponding to the source of the first packets are to be transmitted to an adjacent communication node. Based upon the transmitting ratios thus calculated, an adjacent node is selected to which a second packet is to be transmitted. | 05-19-2011 |
| 20110109034 | MEDIUM TRANSFER DEVICE AND AUTOMATIC PAPER CURRENCY DEPOSIT/WITHDRAWAL MACHINE - Provided is a paper-currency transfer device, which prevents paper-currency clogging in a paper-currency transfer unit composed of a plurality of transfer units and which neither has a complicated structure nor needs a dedicated drive source. A medium transfer device transfers a medium from a sending-side paper-currency transfer passage as a first transfer passage to a receiving-side paper-currency transfer passage as a second transfer passage. The medium transfer device comprises a runner mounted coaxially with a transfer roller on a receiving side of the receiving-side paper-currency transfer passage. The runner is rotated at a higher speed than that of the transfer roller on the receiving side. The drive source of the runner is common to that of the transfer roller. | 05-12-2011 |
| 20110101597 | MEDIUM STORING AND ADVANCING APPARATUS - To provide a medium storing and advancing apparatus which orderly piles up bills even when not flat. The medium storing and advancing apparatus includes a tongue piece roller having tongue pieces having the length thereof predetermined. While the tongue piece roller is rotated to slap the rear end of a bill with the tongue pieces to orient the latter downward, the front end of a following bill is superimposed on the downward-oriented rear end of the preceding bill. | 05-05-2011 |
| 20110084444 | DEVICE FOR CONTAINING AND DISCHARGING PAPER SHEETS OR THE LIKE - Provided is a unit for preventing abnormal conveyance when unreeling a banknote from a drum. A device for storing and discharging paper/paper-like sheets is provided with first and second reels for winding first and second tapes onto, a drum for winding the first and second tapes onto with a banknote sandwiched between respective conveying surfaces of the first and second tapes, and first and second deflecting rollers disposed facing a banknote inlet-outlet and respectively deflecting the first and second tapes toward the drum. The device takes up, or unwinds, the first and second tapes entrained between the drum and the first and second reels via the first and second deflecting rollers so as to store or discharge the banknote. The device is also provided with a guide having a projection projecting toward the drum. The guide is mounted at the first deflecting roller side between the first deflecting roller and the drum, so as to be located on the rear surface side of the first tape running from the first deflecting roller to the drum. | 04-14-2011 |
| 20110078311 | Network communication device and automatic reconnection method - As a defense against cyber attacks, a network communication device permits other communication devices to associate and undergo entity authentication, registers the identifiers of devices that pass entity authentication in a memory, and communicates only with those devices. As a further defense, the network communication device may also impose association control by normally refusing to let other communication devices even associate. The network communication device monitors the communicability of devices with identifiers registered in the memory. If communication with a device becomes disabled, its identifier is removed from the memory and placed in a whitelist. Whitelisted devices may re-associate even while association control is in effect. A device that experiences outage may therefore re-associate autonomously, without requiring human intervention. | 03-31-2011 |
| 20110078237 | Server, network device, client, and network system - A server in a network system generates packets including payload data and at least one capability field, and sends the packets on a traffic path in a communication network. The capability field may indicate the capability of the server to provide the payload data, as determined by the server itself, or the capability of the traffic path to transfer the packets. In the latter case, network devices that transfer the packets update the capability field, or add a new capability field reporting their individual packet transfer capability. A client device receiving the packets can use the information in the capability field(s) to isolate quality problems to the server or the communication network, or to specific network devices in the communication network, and take appropriate action such as canceling a service request or reducing the requested level of service. | 03-31-2011 |
| 20110076025 | Optical bidirectional communication module and optical bidirectional communication apparatus - An optical bidirectional communication module includes a light-emitting element, a light-receiving element and an optical waveguide. The optical waveguide performs wavelength division on light received from an optical fiber and guides the received light to the light-receiving element. The optical waveguide also performs wavelength division on light emitted from the light-emitting element and guides the emitted light to the optical fiber. The light-emitting element, the light-receiving element and the optical waveguide are incorporated on an optical substrate. | 03-31-2011 |
| 20110076022 | Optical communications network, power supply controlling method, station-side equipment, subscriber-side equipment, and semiconductor chip - An optical communications network that is composed of one station-side equipment being connected to plural subscriber-side equipments. The station-side equipment refers to downstream data signals and prepares transmission plans, and generates downstream control signals that include the transmission plans, and converts downstream signals, that include the downstream data signals and the downstream control signals to which identifiers indicating the subscriber-side equipments that are addressees are assigned, into downstream optical signals, and sends the downstream optical signals out toward the subscriber-side equipments. The subscriber-side equipment converts downstream optical signals into downstream electric signals, and refers to identifiers and extracts downstream electric signals addressed to itself, and reads the transmission plans, and generates timer control signals including information of receiving start times and receiving stop times, and, on the basis of the timer control signals, opens and closes a path connecting a receiving section and an electricity supply section. | 03-31-2011 |
| 20110076011 | Apparatus for monitoring optical signal quality specifically applicable to NRZ optical signals - A binary intensity-modulated light signal to be monitored is split into three signal beams. The first and third beams are converted into electric signals. Frequencies of the first electric signal corresponding to a bit rate pass a filter bank. The intensity of the filtered signal is detected by an RF intensity detector. A delaying interferometer makes the second beam interfere with a light signal obtained by delaying the second beam by a predetermined delay time. One of the resulting interference signals is converted into an electric signal. The intensities of the amplified signal are detected by another RF intensity detector. The third electric signal is smoothed by the filter bank, and its average intensity is detected by a power detector. The intensities of the detected, amplified signals are found relative to the detected average intensity to determine wavelength dispersion and optical SNR or the tendency of their changes. | 03-31-2011 |
| 20110076008 | Optical code division multiplexing communication system and method for correcting failure of the same - An OCDM communication system and a method for correcting failure of the same are provided. In the system, encoders and decoders are provided respectively for channels. Each encoder, including an SSFBG, encodes an optical signal using a code value determined according to distance between adjacent unit fiber Bragg gratings in the SFFBG. Each decoder, including an SFFBG, generates a received optical signal by decoding the encoded signal using a code value determined in the same manner. A set temperature of each encoder and decoder is calculated and a corresponding control signal is generated based on average power and error rate detection signals of each received optical signal. The temperature of each encoder or decoder is individually adjusted according to the control signal, which makes equal the code values of an encoder and decoder of a channel in which average power of a received signal has changed or error rate thereof is excessive. | 03-31-2011 |
| 20110075857 | Apparatus for estimating sound source direction from correlation between spatial transfer functions of sound signals on separate channels - An apparatus estimates the direction of a sound source from signals plural microphones capture sound to produce. Data are stored on reverse characteristics of spatial transfer functions defined on sound transmitted from sound source positions to the respective microphones. To the signal produced by each microphone, applied are the reverse characteristics of the spatial transfer functions thus stored in connection with that microphone with respect to the sound source positions to thereby estimate a sound source signal on a sound source position associated with the sound captured. Between the sound source signals estimated on the sound source positions associated with the sounds captured by the microphones, coincidence or higher correlation is found on a sound source position to thereby produce information on at least the direction of the sound source thus found. | 03-31-2011 |
| 20110075832 | Voice band extender separately extending frequency bands of an extracted-noise signal and a noise-suppressed signal - A voice band extender includes a component separator for receiving a band-limited speech signal over a telecommunications line to separate the speech signal into a noise-suppressed signal and an extracted-noise signal, a noise-suppressed signal component extender for adding a signal having its frequency band higher than that of the noise-suppressed signal to thereby produce an extended noise-suppressed signal, an extracted-noise signal component extender for producing an extended extracted-noise signal, a signal intensity adjuster for adjusting signal intensity of either or both of the extended noise-suppressed signal and the extended extracted-noise signal, and a synthesizer for combining the extended noise-suppressed signal and the extended extracted-noise signal obtained by the intensity adjustment. The respective frequency bands of the extracted-noise signal and the noise-suppressed signal are thus extended. | 03-31-2011 |
| 20110075823 | Voice communication arrangement for minimizing communication delay caused by audio signal processing in OS - A voice communication arrangement having a voice communication program installed in a computer loaded with a versatile OS thereon includes a voice data input/output function for passing through the OS voice data produced from voice sound captured by a microphone of the arrangement or received from another voice communication device, when connected to the arrangement, without being processed by the OS as audio data. | 03-31-2011 |
| 20110075733 | Moving picture encoding apparatus and distribution system - A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines a final encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the final encoding rate as encoded data of the non-key frame. To determine the final encoding rate, the number of error-correcting bits needed to correct prediction errors is estimated by a first method and one or more second methods. The second methods are used to decide whether to use the number of bits estimated by the first method as the final encoding rate, or whether to supplement the estimated number of bits by adding an encoding rate correction. As a result, the encoding rate is not supplemented unnecessarily and the encoding efficiency is improved. | 03-31-2011 |
| 20110075726 | Moving picture encoding apparatus and distribution system - A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines an encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the encoding rate as encoded data of the non-key frame. To determine the encoding rate, parameters related to the likelihood of prediction errors are calculated by at least two different methods for each non-key frame, the parameters are compared, one of the parameters is selected, and the encoding rate is calculated from the selected parameter. The selective use of differently calculated parameters enables an efficient encoding rate to be calculated for each non-key frame and reduces the transmission of encoded data that the decoder does not need or cannot decode. | 03-31-2011 |
| 20110075376 | Module substrate radiating heat from electronic component by intermediate heat transfer film and a method for manufacturing the same - A module substrate having a heat-generative electronic component mounted thereon includes first and second dielectric substrates and an intermediate heat transfer film. The heat-generative electronic component is flip-chip bonded on a wiring layer formed on the main surface of the first dielectric substrate through a solder bump. The second dielectric substrate is attached to the upper surface of the electronic component through an insulating layer. The intermediate heat transfer film for transferring heat generated by the electronic component to the second dielectric substrate is attached between the insulating layer and the second dielectric substrate so as to make the intermediate heat transfer film in close contact with the lower surface of the second dielectric substrate, thereby suppressing the temperature of the heat-generative electronic component in operation from increasing. | 03-31-2011 |
| 20110074012 | Substrate with built-in semiconductor element, and method of fabricating substrate with built-in semiconductor element - There is provided a substrate with a built-in semiconductor element, including: a first substrate at which a wiring layer is layered on a dielectric layer; a semiconductor element that is structured to include a distributed constant circuit, and at which plural bonding pads are formed at a peripheral region of a surface that faces the first substrate, and that is electrically connected to the wiring layer by an electrically-conductive member that has electrical conductivity and corresponds to the plural bonding pads; a supporting member that is disposed at an inner side region that is further toward an inner side than the peripheral region of the semiconductor element, and that is interposed between the semiconductor element and the first substrate and supports the semiconductor element; and a second substrate that is laminated to the first substrate and the semiconductor element. | 03-31-2011 |
| 20110073912 | AlGaN/GaN hemt with normally-off threshold minimized and method of manufacturing the same - In a method of forming a gate recess, on a surface of an epitaxial wafer including an epitaxial substrate, having a semiconductor layer having the band gap energy varying therein in the depth-wise direction, and a SiN surface protective layer, having a sidewall forming a gate opening and coating the surface of the epitaxial substrate, ultraviolet light having its energy equivalent to the band gap energy of the specific semiconductor layer is irradiated, while the specific semiconductor layer is photoelectrochemically etched from the gate opening with the SiN surface protective layer used as a mask. The gate recess free from plasma ion-induced damage is thus obtained. | 03-31-2011 |
| 20110073783 | Quantum entangled photon pair generating device - Excitation light is split into two components with mutually orthogonal polarization. One component is fed clockwise and the other component is fed counterclockwise into a polarization maintaining loop. An optical conversion generation unit including two second-order nonlinear optical media disposed on opposite sides of a half-wave plate in the loop generates up-converted light from each excitation component by second harmonic generation, and generates down-converted light from the up-converted light by spontaneous parametric down conversion. A polarization manipulation unit manipulates the polarization direction of at least one of the excitation or down-converted components. The clockwise and counterclockwise components of the down-converted light are recombined and output as quantum entangled photon pairs having substantially the same wavelength as the excitation light. The optical components can be optimized for operation at this wavelength without the need to consider the shorter wavelength of the up-converted light. | 03-31-2011 |
| 20110073611 | MEDIUM STORING AND ADVANCING APPARATUS - To provide a medium storing and advancing apparatus for inhibiting rotation of a drum when tapes are completely rewound from the drum. The apparatus includes reels supplying and winding up the tapes, a drum winding up the tapes supplied from the reels or rewinding wound-up tapes to supply the tapes to the reels, and an inhibiting mechanism inhibiting further rotation of the drum in a direction of rewinding the tapes when the drum completely rewinds the tapes, whereby the inhibiting mechanism inhibits the rotation of the drum. | 03-31-2011 |
| 20110069847 | Sound collecting device, acoustic communication system, and computer-readable storage medium - There is provided a sound collecting device, including: an orientation direction forming section that forms an orientation direction of a microphone array; and a control section that, when a characteristic in a frequency band of a synthesized signal obtained by synthesizing the acoustic signals corresponds to a characteristic of an acoustic signal corresponding to a sound other than a target sound, controls the orientation direction forming section such that an orientation direction that is a direction that is different than an orientation direction of the microphone array at a present point in time is formed, and, when the characteristic in the frequency band of the synthesized signal does not correspond to a characteristic of an acoustic signal corresponding to a sound other than the target sound, controls the orientation direction forming section such that the orientation direction of the microphone array is maintained. | 03-24-2011 |
| 20110066856 | Communication data freshness confirmation system - A receiving device sends challenge information to a transmitting device. The transmitting device initializes a time varying parameter and transmits communication data together with data derived from the challenge information to the receiving device. Subsequent communication data, if any, are then transmitted together with data derived from the time varying parameter. The receiving device uses the challenge information to verify the freshness of the communication data transmitted first, and uses the time varying parameter to verify the freshness of the subsequent communication data. Freshness can be verified without having to maintain any type of verification data during sleep periods, and without having to send a separate challenge for each data transmission. | 03-17-2011 |
| 20110066579 | Neural network system for time series data prediction - A neural network system for predicting time series data. The system receives analyzed data obtained by multiresolution analysis of the time series data. The input processing layer of the system includes a series of neurons corresponding to the different levels of analysis, each neuron receiving the analyzed data for it own level. The output of each of these neurons is supplied as an additional input to the neuron for the next lower level of analysis. A predicted value is derived from the output of the neuron at the lowest level. The passing of results from one level to another improves prediction accuracy and simplifies the structure of any further processing layers. | 03-17-2011 |
| 20110063457 | Arrangement for controlling networked PTZ cameras - A camera controller allows the user to control a predominant camera currently shooting a subject and its nearby cameras simply by manipulating the predominant camera. The camera controller is communicably connected to networked cameras held at positions and controls the shooting direction of the imager built in the cameras according to control data. The controller has a video data detector for extracting motion picture data produced by the predominant camera from motion picture data produced by all of the cameras, and a camera control that corrects control data about the shooting camera with camera control request data entered by the user. The camera control outputs the corrected control data about the shooting camera to the predominant camera and also to the nearby cameras near the predominant camera. | 03-17-2011 |
| 20110058667 | ECHO CANCELLER HAVING ITS EFFECTIVE FILTER TAPS ADAPTIVELY CONTROLLED WITH ECHO CANCELLATION AMOUNT MONITORED - In an echo canceller including an ADF and a cancellation adder, an ACANC calculator finds an average value of the amount of echo cancellation for a predetermined period to update the average value of the amount of echo cancellation, and detects a convergence state of the ADF to find the amount of echo cancellation in the convergence state of the ADF. A coefficient selector, when receiving a detection signal of the convergence state from the ACANC calculator, finds a power ratio of the sum total of power of all tap coefficients and the partial total of power of tap coefficients not to be assigned to taps to determine the effective number of taps useful for suppressing an echo component on the basis of the amount of echo cancellation and the power ratio. The ADF updates only the effective number of taps to disable the remaining taps. | 03-10-2011 |
| 20110055319 | System and method for providing presence information - A method and a system for providing presence information is disclosed which can incorporate non-presence-ready terminal nodes such as sensor node terminals and combine a plurality of pieces of presence information from a plurality of nodes, thereby providing presence information with improved reliability. The method includes creating circumstance presence information associated with a user in response to a change in value of sensor data transmitted from at least one sensor node terminal. For a presence server to deliver presence information, the method also includes delivering circumstance presence information created in relation to the user either in place of the presence information or in combination with the presence information. | 03-03-2011 |
| 20110053493 | Wireless device and wireless system - A wireless device operates in a first mode, in which it relays communications between neighboring wireless devices, and a second mode, in which it does not relay communications. The wireless device periodically transmits information indicating its operating mode to the neighboring wireless devices. In the first mode, when not transmitting mode information or communication data, the wireless device stands by with its receiver powered, ready to receive mode information or communication data from neighboring wireless devices. In the second mode, the wireless device is normally in a sleep state and wakes up only at scheduled intervals to transmit and receive mode information and communication data. The wireless device stores the received mode information and selects its operating mode according to the stored mode information, selecting the second mode when this does not prevent the prevent communication with or among the neighboring wireless devices. | 03-03-2011 |
| 20110051652 | Wireless communication apparatus - A packet is transmitted from a source node to a destination node via a relay path in a multi-hop network. The packet is transmitted by cache routing or source routing, depending on the presence or absence of information identifying the destination node in a history table maintained at the source node. In source routing, relay path information is included in the packet. In cache routing, relay nodes obtain routing information from entries in their own cache routing tables. Each entry indicates only the destination node and the next relay node, and each cache routing table has a limited size. When a series of packets are transmitted to the second node, cache routing can be used for all but the first packet, thereby reducing packet overhead. | 03-03-2011 |
| 20110051227 | Quantum entangled photon pair generating device - Excitation light is split into two components with mutually orthogonal polarization. One component is fed clockwise and the other component is fed counterclockwise into a polarization maintaining loop. A second-order nonlinear optical medium disposed in the loop generates up-converted light from each excitation component by second harmonic generation, and generates down-converted light from the up-converted light by spontaneous parametric down conversion. A polarization manipulation unit manipulates the polarization direction of at least one of the excitation or down-converted components. The clockwise and counterclockwise components of the down-converted light are recombined and output as quantum entangled photon pairs having substantially the same wavelength as the excitation light. The optical components can be optimized for operation at this wavelength without the need to consider the shorter wavelength of the up-converted light. | 03-03-2011 |
| 20110043817 | Polarization independent directional coupler and related optical devices - An optical device has two optical waveguides embedded in a clad. The optical waveguides are mutually parallel and are separated by a distance that allows optical coupling between them. The optical waveguides have identical square cross sectional shapes in a plane orthogonal to the direction of light propagation, so that light propagates through each optical waveguide without polarization dependence. The length of each side of the square cross section of the optical waveguides is determined from the refractive index of the clad and the distance between the longitudinal axes of the optical waveguides so that coupling between the two optical waveguides is also polarization independent for light with a wavelength of 1.49 micrometers, which is the longer of the two wavelengths used in optical subscriber networks. | 02-24-2011 |
| 20110043598 | Remote communication apparatus and method of estimating a distance between an imaging device and a user image-captured - A remote communication apparatus for receiving the image of a remote user captured by an imaging device to show the image to another user includes a zoom controller for controlling a zoom ratio defining the angle of view of the imaging device, and an estimator for estimating a distance between the imaging device and the remote user on the basis of the zoom ratio of the imaging device. | 02-24-2011 |
| 20110042769 | ULTRAVIOLET DETECTING DEVICE AND MANUFACTURING METHOD THREOF, AND ULTRAVIOLET QUANTITY MEASURING APPARATUS - The present invention provides an ultraviolet detecting device which comprises a silicon semiconductor layer having a thickness ranging from greater than or equal to 3 nm to less than or equal to 36 nm, which is formed over an insulating layer, lateral PN-junction type first and second photodiodes formed in the silicon semiconductor layer, an interlayer insulating film formed over the silicon semiconductor layer, a first filter layer made of silicon nitride, which is formed over the interlayer insulating film provided over the first photodiode and causes light lying in a wavelength range of an UV-B wave or higher to pass therethrough, and a second filter layer made of silicon nitride, which is formed over the interlayer insulating film provided over the second photodiode and allows light lying in a wavelength range of an UV-A wave or higher to pass therethrough. | 02-24-2011 |
| 20110042672 | Coplanar waveguide having amorphous silicon layer between substrate and insulated layer and a manufacturing method thereof - A coplanar waveguide includes a high resistance silicon substrate having one primary surface on which an amorphous silicon layer is formed, an insulated layer formed on the amorphous silicon layer, a signal line arranged on the insulated layer and a pair of ground planes arranged on the insulated layer so as to put the signal line between the planes. The coplanar waveguide is not structured as conventionally having a thick insulated layer formed on a single-crystalline silicon substrate, thereby reducing attenuation otherwise caused by leakage of electromagnetic wave in a frequency bandwidth of millimeter wave. | 02-24-2011 |
| 20110036682 | BILL PROCESSING DEVICE, REGISTER DEVICE, CHANGE MACHINE, DISTRIBUTION DEVICE, AND NETWORK SYSTEM - In a bill processing device, a fake bill profile information acquiring unit acquires, from an external distribution device, fake bill profile information that is used in discriminating fake bills, and a fake bill profile information registration unit registers acquired information, and a bill discriminating unit discriminates, on the basis of the information, whether or not a deposited bill is a fake bill, and a fake bill processing unit does not accept a deposited bill that is discriminated to be a fake bill. | 02-17-2011 |
| 20110013195 | Polarization independent optical device - An optical device includes a core sandwiched between two clads. The core includes a planar waveguide layer with ridges protruding into one of the clads, forming a ridge waveguide structure that guides the propagation of light in the core. The core dimensions satisfy the following conditions: the ridge width is less than the total core height; the ridge height is less than the ridge width; the thickness of the planar waveguide layer is equal to or less than one-fourth of the total core height. Dimensions satisfying these conditions can be selected to provide polarization independent operation. The ridges may be arranged to define a pair of optical waveguides forming a Mach-Zehnder interferometer, an optical wavelength filter, or various other optical devices. | 01-20-2011 |
| 20110008061 | Synchronous circuit for use in optical homodyne receiver for generating local oscillation light with accurate demodulation - In a synchronous circuit, a synchronizing signal generator combines either an optical BPSK signal or local oscillation light with a phase-shifted signal to produce different optical signals, one of which for use in producing a signal demodulated from the BPSK signal is square-law detected, and calculates the optical signal detected to convert the signal into an electric signal. The generator produces an electric phase-locking signal which will be a demodulated signal from the BPSK signal on the basis of the electric signal. The phase-locking signal is used as a modulating signal by an intensity-modulating circuit to modulate an incident continuous light into an optical intensity-modulated signal, which is optoelectrically converted and square-law detected by an optoelectric converter. The converted signal is used by an optical VCO circuit as a phase error signal to adjust the phase or frequency of the local oscillation light, which is supplied to the signal generator. | 01-13-2011 |
| 20110008046 | Subscriber terminal of adjusting intensity of optical signal by controlling attenuation, and a method therefor - A subscriber terminal connected to a central-office unit in an optical communication network includes a variable optical attenuator for attenuating an optical signal received from the central-office unit; an optical-electric converter for converting the optical signal received via the attenuator to a corresponding electric signal; a clock extractor for extracting a clock from the electric signal and producing a clock extraction information signal representing whether or not the clock is extracted stably; and a terminal controller. The controller includes a clock extraction decider for determining whether or not the extractor stably extracts the clock on the basis of the information signal, a receiving level adjuster for setting an attenuation value to a value between a minimum and a maximum value, and an attenuation controller for setting the attenuation amount for the attenuator to the set attenuation value. | 01-13-2011 |
| 20100329116 | Conflict avoidance with transmission timing and path mutually restrained responsively to wireless environment changing - A communication control apparatus is adaptive to changes in a wireless communication environment to control transmission timing and path reciprocally between network nodes to thereby avoid transmission collisions and congestions. A transmission timing control calculator contends with other nodes for a band to transmit a data signal to control a transmission timing of its own node. A path control calculator determines transmission paths for transmitting data signals within the bandwidth for the own node obtained by the transmission timing control calculator. A data signal transmitter transmits a data signal to a destination node on each transmission path determined by the path control calculator. The transmission timing control calculator and the path control calculator provide each other with state information on processing, and use the provided state information as a constraint condition to control the bands of the own node and of links between the own and destination nodes. | 12-30-2010 |
| 20100322315 | MOTION VECTOR DETECTION APPARATUS AND METHOD, MOVING PICTURE ENCODING APPARATUS AND METHOD, AND MOVING PICTURE DECODING APPARATUS AND METHOD - A motion vector detection apparatus that obtains, for each of the blocks of a predetermined size into which one frame is divided, motion vector information in units of a plurality of partitions of differing rectangular shapes and differing sizes, up to the size of the blocks, has a partition connector means ( | 12-23-2010 |
| 20100322074 | DYNAMIC BANDWIDTH ALLOCATION METHOD AND DYNAMIC BANDWIDTH ALLOCATION DEVICE - A dynamic bandwidth allocation method and apparatus that can allocate bandwidth dynamically so as to guarantee communication in a minimum guaranteed bandwidth from each subscriber device and enable communication within a maximum communicable bandwidth from each subscriber device, and can reduce the manufacturing cost of the devices. A subscriber device ( | 12-23-2010 |
| 20100292618 | Motion analysis device, program and method thereof and motion analysis system - The present invention relates to a motion analysis system that includes a sensor device for measuring a motion amount related to an object which repeats a certain motion and a motion analysis device for analyzing the certain motion of the object based on the measured result by the sensor device. The motion analysis device includes means for storing time series data of the motion amount measured by the sensor device; means for analyzing a spectral intensity in each frequency in time series of waveforms shown by the time series data by using a certain function and analyzing by applying different parameters for each frequency to the function; and means for comparing spectral intensity analysis result in each frequency with different frequencies and analyzing a certain physical amount related to the certain motion of the object based on the comparison result. | 11-18-2010 |
| 20100290615 | Echo canceller operative in response to fluctuation on echo path - In a telephone device, a near-end signal processor delays each input near-end signal delivered from the respective microphones by a delay amount, and synthesizes the input near-end signals into a synthesized near-end signal. In an echo canceller, mounted on board the telephone device, a far-end signal is delayed by the same delay amounts as used in the near-end signal processor to form plural delayed far-end signals, which are synthesized into a synthesized far-end signal, with which the echo component in the synthesized near-end signal will be suppressed. | 11-18-2010 |
| 20100272248 | Voice communications apparatus - Voice communications apparatus intervenes between a telephone set and a broad-band transmission path that has a communication band broader than a voice band limited by the transmitter and receiver characteristics of the telephone set. The voice communications apparatus includes a transmitter frequency characteristic corrector circuit for correcting the frequency characteristic of a signal input from the telephone set, and a receiver frequency characteristic corrector circuit for correcting the frequency characteristic of a signal to be input to the telephone set. | 10-28-2010 |
| 20100258845 | Semiconductor device and method for manufacturing same - There is provided a semiconductor device capable of deactivating 2-dimensional electron gas (2DEG) layers in a buffer layer having a multi-layer film structure. The buffer layer is formed in a high electron mobility transistor (HEMT) formed on a silicon (Si) substrate. The semiconductor device includes the substrate whose uppermost layer is the Si layer, the buffer layer constructed by alternately stacking a plurality of first layers and a plurality of second layers on the Si layer, third layer serving as an electron transit layer formed on the buffer layer, and fourth layer serving as an electron supplying layer formed on the third layer. The first layer is composed of the same material as for the third layer. A p-type impurity is introduced into the first layers so as to deactivate the 2DEG layers formed in the first layer near interfaces between the first and second layers. | 10-14-2010 |
| 20100258814 | Light emitting diode and method of fabrication thereof - There is provided a light emitting diode fabricating method including: a) forming, on a substrate and via a buffer layer, an epitaxial growth layer that includes a light emitting layer, and forming one electrode on a surface of the epitaxial growth layer; b) joining a supporting substrate to the one electrode; c) removing, by etching, the substrate and the buffer layer; and d) forming another electrode at a region, other than a region where output light is taken-out, at a reverse surface opposite the surface of the epitaxial growth layer on which the one electrode is formed. | 10-14-2010 |
| 20100254454 | Apparatus for decoding video compression coded data - A decoding apparatus includes a standard predicted image generating unit which generates a standard decoded image and a standard predicted image of standard image quality; a non-standard decoded image generating unit which generates a non-standard decoded image different in image quality based on a prediction error information; a non-standard predicted image generating unit which generates a non-standard predicted image different in image quality based on the non-standard decoded image; and a correction value calculating unit which calculates correction values corresponding to differences between the standard and non-standard predicted images. The non-standard decoded image generating unit includes a predicted image reconstructing unit which corrects the non-standard predicted image, and a decoding unit which inverse-quantizes the prediction error information and adds the inverse-quantized prediction error information and the corrected non-standard predicted image to generate the non-standard decoded image. | 10-07-2010 |
| 20100249961 | Environmental sound reproducing device - An environmental sound reproducing device which can appropriately transfer a state of a target in a remote area from that remote area to a desired destination is provided. This sound reproducing device includes a communication unit that receives state information indicating a state of a detection target from an external detector. The environmental sound reproducing device also includes a database that stores in advance one or more environmental sound data corresponding to one or more states of the detection target. The environmental sound reproducing device also includes a selector that selects, based on the state information, most appropriate one of the environmental sound data from the database. The environmental sound reproducing device also includes a sound reproducing unit that reproduces the selected environmental sound data (creates a sound represented by the selected environmental sound data). The environmental sound data which have been prepared in advance is reproduced, in place of an actual sound, based on the state information supplied from the detection device. The environmental sound data does not contain noise, a disturbing sound, unpleasant sound or the like. Hence, unnecessary sounds such as noise are not transmitted to a user. The state of the detection target can be transferred more appropriately than the case of transmitting the actual sound. | 09-30-2010 |
| 20100247097 | Optical signal generator - An optical signal generator includes a splitter, a first modulator, a second modulator, a signal-switching unit and a multiplexer. The splitter splits an optical pulse train into a first pulse train and a second pulse train. The first modulator receives the first pulse train and first data signal, and generates a first modulation signal by performing on-off-keying or phase modulation on the first pulse train based on the strength of the first data signal. The second modulator receives the second pulse train and second data signal, and generates a second modulation signal by performing the on-off-keying or phase modulation on the second pulse train based on the strength of the second data signal. The signal-switching unit delays pulses of the second modulation signal or adjusts a phase of a carrier included in the second modulation signal according to a switching signal. The multiplexer generates an optical modulation signal by multiplexing the first modulation signal and the second modulation signal. | 09-30-2010 |
| 20100246803 | Bandwidth extension apparatus for automatically adjusting the bandwidth of inputted signal and a method therefor - A bandwidth extension apparatus can generate from an inputted speech signal a bandwidth-extended signal whose bandwidth is automatically adjusted according to the surrounding hearing situation by means of a parameter. The apparatus has a surrounding characteristic predictor for predicting the characteristic amount of the surrounding sound of the phone terminal on which the apparatus is installed; an adjustment amount predictor for comparing the characteristic amount with the parameter to predict the adjustment amount for the parameter; a speech characteristic predictor for predicting the characteristic amount of the inputted speech signal; and an adjustment amount determiner for determining an adjustment amount for updating the parameter based on the characteristic amount of the surrounding sound and the inputted speech signal. | 09-30-2010 |
| 20100246725 | Selective diversity receiving method and apparatus - In a selective diversity receiver with two antennas, the strength of the signal received by each antenna is measured at a present and a past time, the difference between the present strengths of the signals received by the two antennas is calculated, and the difference between the present and past strengths of the signal received by each antenna is calculated. If the difference between the present strengths of the two signals is not too large, the signal with the smaller past-to-present strength difference and accordingly with less fading is selected for further reception. In a portable electronic device, this antenna switching strategy reduces susceptibility to human body interference. The present and past strengths can be measured during the preambles of different packets to avoid switching antennas during data reception. | 09-30-2010 |
| 20100246608 | Jitter buffering control for controlling storage locations of a jitter buffer, and a method therefor - A jitter buffer control apparatus has a buffer for storing data included in an input packet transmitted from a telecommunications network, and a jitter buffer controller for controlling the buffer to store the input data into the buffer and take out the stored data from the buffer on the basis of a sequence number included in the input packet in a processing period. When under-running occurs in the buffer, the jitter buffer controller stores input data into the buffer with a storage location skipped which corresponds to the processing period associated with packet loss due to the under-running. | 09-30-2010 |
| 20100246556 | Communication method and apparatus - In a wireless communication system, the communicating stations reduce their transmitting power level when they detect interference exceeding a certain level. Interference is detected by down-shifting the received signal to place the desired signal in the baseband, then sampling the down-shifted signal, first at a sampling frequency high enough to catch the interference, then at a lower sampling frequency that excludes the interference. This system is useful for vehicle-to-vehicle communication in an environment in which vehicle-to-roadside communication may also be present at various nearby frequencies, because it does not require exact knowledge of the interfering frequencies and allows communication to continue even when interference is present. | 09-30-2010 |
| 20100244522 | Chair providing more comfortable when seated in optimum posture while reclining - A chair has a link of a chair back, a link of a chair seat, and a link mechanism that pushes up the link of the chair seat when the link of the chair back is pressed to incline rearward, so that the occupant can take the optimum seating posture without being conscious, thus further improving the comfort in the reclined posture. | 09-30-2010 |
| 20100241924 | DECODING DEVICE, ENCODING DEVICE, AND CODING SYSTEM - A decoding device is provided, which can minimize the number of coded data addition requests by the decoding device, reduce processing time to prevent delay, and minimize frame rate reduction. The decoding device performs data reproduction by performing error correction of data of a predicted image using coded data which is an error correction code generated based on original data. The decoding device includes a coded bit receiving part, a preset value generating/updating part, a decoding part that performs a decoding process based on a preset value or a predicted value, and coded bits, and a bit addition request determining part that determines whether or not there is a need to request additional coded bits from decoding process results from the decoder. When it is determined to perform a decoding process with additional coded data, the preset value generating/updating part updates the preset value based on previous decoding process results. | 09-23-2010 |
| 20100241435 | Apparatus for efficiently mixing narrowband and wideband voice data and a method therefor - A voice mixing apparatus decodes input encoded narrowband voice data and encoded voice data for narrowband region of input encoded wideband voice data, and detects a speaker in accordance with the decoded voice signals of the entire narrowband. When encoded voice data from a speaker is included in the narrowband, a signal in a region outside the narrowband of the expanded data is encoded. When the data is included in the wideband, encoded voice data of the region outside the narrowband is extracted for output. When the destination terminal is compatible with the encoded narrowband voice data, the narrowband voice signal mixed is encoded and output. When the destination terminal is compatible with wideband, the narrowband voice signal mixed is encoded for the narrowband region, and the voice data of the speaker is used as the encoded voice data for the region outside the narrowband. | 09-23-2010 |
| 20100239054 | Receiver apparatus for absorbing clock difference between transmitting and receiving sides and a method therefor - Data received by a receiver is processed at a sampling rate indicated manually or automatically in the receiver. The sampling rate of the received data is controlled in accordance with the processing rate. The sampling rate controlled data is then processed so as to convert its frequency distribution to that the received data originally had. | 09-23-2010 |
| 20100235415 | PROCESSING APPARATUS FOR CALCULATING AN APPROXIMATE VALUE TO AN ANALYTICAL VALUE WITH A TOLERANCE MAINTAINED AND A METHOD THEREFOR - In an approximation computation apparatus, a location monitor designates, each time the number of data of a received data sequence exceeds an integer l, a starting location of the received data for calculating reduced received-data; a dimensionality reducer dimensionally reduces each data sequence including the received data after the corresponding designated starting location by random projection to generate the reduced received-data; an object selecting controller controls an object in response to a result of monitoring from the location monitor of the number of the received data reaching another integer n, deletes currently-stored object data, selects the reduced received-data after the oldest reduced received-data in the reduced received-data, and substitutes and updates an object data sequence to the selected reduced received-data; and a coefficient approximator calculates an approximate value of a wavelet coefficient on the basis of the object data and a wavelet matrix. | 09-16-2010 |
| 20100228981 | Communication method, mesh netwrok system and communication terminal - A communication method in which an operation, such as authentication, required when a new communication terminal participates in a mesh network is carried out in a more efficient manner. A second communication terminal that has already established an adjacent communication link with at least two first communication terminals, out of a plurality of communication terminals, distributes an adjacent terminal list including terminal identifiers of the first communication terminals along with a temporal key generated by the second communication terminal. One of the first communication terminals that received the adjacent terminal list and the temporal key distributes adjacent registration information, which is generated using a second temporal key. The other one of the first communication terminals that received both the adjacent terminal list and the adjacent registration information determines whether the terminal identifier of one of the first communication terminals is included in the adjacent terminal list, and whether the first temporal key distributed along with the adjacent terminal list matches with the second temporal key used for generating the adjacent registration information. If both determination results are affirmative, one of the first communication terminals is authenticated. | 09-09-2010 |
| 20100226492 | Echo canceller canceling an echo according to timings of producing and detecting an identified frequency component signal - An echo canceller includes an initial delay estimator producing a reference signal containing an identified frequency component masked by means of frequency masking effect to output the reference signal on an echo path, and detecting, from a sending voice signal, an echo component of the identified frequency component derived from the reference signal. The estimator finds an initial delay amount on the echo path on the basis of a forming timing of the reference signal containing the identified frequency component and a detection timing of the echo component in the identified frequency component in the sending voice signal. The echo canceller includes a delay circuit for delaying a received voice signal by the initial delay amount on the echo path obtained from the estimator to supply a resulting signal to a pseudo echo generator. | 09-09-2010 |
| 20100226431 | Video encoder and decoder apparatus deciding error in transform coefficients between an original image and a predictive image - A video encoder apparatus using a distributed video coding (DVC) includes a Wyner-Ziv frame encoder for forming a predictive image of a Wyner-Ziv frame on the basis of coded key frames, and determining, according to the fallibility of the transform coefficients of the predictive image with respect to the transform coefficients of an original image based on the Wyner-Ziv frame, the amount of error correction codes to be transmitted so as to transmit the error correction codes corresponding to the determined amount. When no errors are found between the transform coefficients of the original image of the Wyner-Ziv frame and the predictive image, information indicating that no errors are found is sent out instead of the error correction codes for the Wyner-Ziv frame in question. | 09-09-2010 |
| 20100226306 | Radio communication terminal and radio communication system - A radio communication terminal and a radio communication system which can avoid an obstacle that is caused by a malicious wormhole while using a harmless wormhole. There are provided: a radio communication terminal in which a relay route about a certain node is stored as a backup route about the node and the backup route is changed and set as a relay route about the node in accordance with a detection of an obstacle caused by application data; and a radio communication system in which a sink node transmits a transfer destination change command in association with the change setting and a node which received the command sets a node of a transferring source of the command as a transfer destination node. | 09-09-2010 |
| 20100225471 | Information providing server, server system, and method - An information providing server obtains user information from a user apparatus. The user information is dependent on a place at which the user was previously located. The information providing server decides, from the user information, whether the user has been present within a permission zone including an information acquisition apparatus, and interconnects the user apparatus and the information acquisition apparatus, directly or indirectly, only if such is the case. Users who were present within the permission zone are able to obtain information acquired by the information acquisition apparatus without going through a preliminary registration procedure, while other users are unable to obtain the acquired information. | 09-09-2010 |
| 20100224911 | Gallium nitride high electron mobility transistor - There is provided a gallium nitride high electron mobility transistor including: a channel layer that lets a carrier travel at high velocity; a carrier supply layer that generates the carrier; and a cap layer, disposed on the carrier supply layer and functioning to prevent oxidation of the carrier supply layer, to reduce gate leakage current, and to increase voltage withstand to gate voltage, wherein a thickness of the cap layer is set at a minimum as thicker than 11 nm. | 09-09-2010 |
| 20100223455 | Encrypted-traffic discrimination device and encrypted-traffic discrimination system - An encrypted-traffic discrimination device includes an input interface, a flow discrimination section, a data accumulation section, a selective data calculation section, a calculation result determination section, and an output interface. The flow discrimination section discriminates the input traffic into separate flows based on at least a transmission origin address and a transmission destination address. The data accumulation section accumulates characteristic amount data of the traffic for each of the separate flows. The selective data calculation section executes an evaluation computation utilizing specific data from the characteristic amount data. The calculation result determination section that, based on a calculated evaluation computation value, executes threshold value determination to determine whether or not the traffic is encrypted, and, if the traffic is determined to be encrypted, which encryption format the traffic is encrypted with. | 09-02-2010 |
| 20100221018 | Polarization mode dispersion suppressing method and polarization mode dispersion suppressing apparatus - A polarization mode dispersion (PMD) suppressing apparatus wherein a first polarization controller adjusts a polarization of an input signal, thereby generating a first polarization adjusted signal; a variable DGD compensator gives a DGD to the first polarization adjusted signal, thereby generating a first PMD compensated signal; a second polarization controller adjusts a polarization of the first PMD compensated signal, thereby generating a second polarization adjusted signal; a polarization beam splitter produces a higher-order PMD suppressed signal forming one of two orthogonal components of the second polarization adjusted signal and a monitor signal forming the other component; an intensity detector generates an optical carrier intensity signal reflecting the intensity of an optical carrier wavelength component; and a control signal generator controls the first polarization controller, etc., based on the optical carrier intensity signal such that the optical carrier wavelength component intensity becomes minimal. | 09-02-2010 |
| 20100221010 | Encoding-decoding method, optical pulse time spreading apparatus, optical add-drop-multiplexer, and optical communication system - An optical pulse time spreading apparatus wherein an optical splitter divides an input optical pulse into first to U-th input optical pulses; first to U-th optical pulse time spreaders respectively have the first to U-th input optical pulses input thereto and output first to U-th chip pulse sequences each consisting of N chip pulses from a first to an N-th chip pulse arranged in order on a time axis into which the input optical pulse is time-spread; and an interval between adjacent ones of unit FBGs arranged in a p-th optical pulse time spreader and a Bragg reflection wavelength of the unit FBGs in the p-th optical pulse time spreader are set such that spectra of the first to U-th chip pulse sequences are different from each other. | 09-02-2010 |
| 20100220787 | Video encoding and decoding apparatus, method, and system - A video sequence is encoded by encoding key frames to obtain coded data and non-key frames to obtain error-correcting information. In the encoding process, key frame data are stored in a buffer, first motion information pertaining to the key frames is obtained, and the first motion information is applied to the stored key frame data to generate predicted key frame data. Second motion information pertaining to the non-key frames is also obtained and used to generate predicted non-key frame data. Either the first motion information is obtained from the second motion information, or the second motion information is obtained from the first motion information. The encoder accordingly does not have to obtain motion information from the decoder, and can estimate the amount of error-correcting information to send to the decoder. | 09-02-2010 |
| 20100215373 | Method and apparatus for generating time-division multiplexed encoded transmission signal - The present invention provides a method of generating time-division multiplexed encoded transmission signals, including encoding optical pulse signals for each of a plural multiplexed channels and generating a transmission signal for each channel, performing time division multiplexing on first and second transmission signals and generating a 2-channel multiplexed signal modulating the multiplexed signal with a modulation signal having a frequency of (F−Δf) Hz, detecting a strength of a Δf Hz frequency component of the multiplexed signal changing a time delay amount of the second transmission signal with respect to the first transmission signal, and determining a time delay amount at which a strength of the Δf Hz frequency component is minimized and adjusting the transmission signals of the individual channels such that they are arranged at equidistant intervals on a time axis. | 08-26-2010 |
| 20100215370 | OPTICAL CODE DIVISION MULTIPLEX SIGNAL GENERATOR - An optical code division multiplexing signal generator provided with an optical pulse light source, a first encoder to an N | 08-26-2010 |
| 20100209045 | Optical resonator, and fluid optical sensor employing an optical resonator - There is provided an optical resonator including: N individual optical waveguide paths of line segment shape disposed in a common flat-plane so as to intersect at a single intersection region, wherein N is an integer of 2 or more; curved optical waveguide paths connecting respective portions of the optical waveguide paths that extend towards the outside from the intersection region, wherein for a first to a 2N | 08-19-2010 |
| 20100207244 | Semiconductor apparatus with decoupling capacitor - A lead frame type of semiconductor apparatus includes a die pad on which a semiconductor chip is mounted; ground terminals which are to be grounded; power supply terminals which are connected to a power supply; inner leads connected to the ground terminals and power supply terminals, in which a pair of adjacent inner leads for power supply terminal and ground terminal are extended inwardly; a chip capacitor mounting pad which is provided at inner ends of the extended inner leads; and a chip capacitor which is mounted on the chip capacitor mounting pad so that a decoupling capacitor is provided. | 08-19-2010 |
| 20100202443 | Voice communications system - Voice communications apparatus is connected to a general subscriber telephone set or a broadband telephone set, to communicate over the public switched telephone network. The apparatus includes a filter converting signals such as to satisfy signal conditions prescribed for the telephone network. The apparatus also includes a terminal class determiner for determining the class of the telephone set connected, and a circuit for changing at least the sampling frequency at which the analog signals from the telephone set are sampled. This establishes high quality in broadband voice communications. The terminal class determiner may automatically determine the class of the telephone set at any timing of a call sequence by detecting a band component of the signals from the telephone set, a predetermined frequency of a signal intermittently transmitted from the telephone set or the characteristics of the telephone set. | 08-12-2010 |
| 20100195560 | Packet relay system and wireless node - A packet relay system in which each node calculates a link cost of each adjacent node based on an arrival rate of a packet from each adjacent node, acquires an accumulated value of a link cost calculated by each node in a range of nodes from a sink node for each adjacent node, calculates, for each adjacent node, a path cost of the one adjacent node by adding the link cost calculated to the accumulated value, and relays a data packet to one adjacent node selected from among nodes adjacent to the node based on a path cost of each adjacent node. This enables establishment of an upstream path to a sink node without increasing the amount of communication in a network. | 08-05-2010 |
| 20100195520 | Apparatus for detecting quality deterioration of a telecommunications network by discriminating periodic faults - An apparatus for detecting deterioration in quality of a telecommunications network includes a packet monitor for monitoring a packet flowing through the network, a quality information extractor for extracting the quality index of the network on the basis of the packet monitored, a quality deterioration detector for detecting deterioration in quality of the network on the basis of the quality index. The quality deterioration detector determines, for the packet monitored and coming only from a wired line, that the quality of the network is deteriorated if the quality index decreases, and determines, for the packet monitored and coming from a wireless line, that the quality of the network is deteriorated if the quality index aperiodically decreases. | 08-05-2010 |
| 20100185760 | Overlay network traffic detection, monitoring, and control - An overlay network traffic detection system deploys traffic measurement units at multiple points on a network, creates profiles of the network traffic measured at each point, and then compiles the traffic profiles obtained at different points. The compiled profile of outbound traffic originating at a node is compared with the compiled profile of inbound traffic addressed to the same node. A strong correlation between the two profiles indicates that the node is relaying overlay network traffic. Further information can be gained by profile screening, by active interference in the traffic flow, by launching known information into the network at known times and observing its effect on the traffic profiles, and by observing keyword distributions in non-encrypted traffic. | 07-22-2010 |
| 20100184488 | Sound signal adjuster adjusting the sound volume of a distal end voice signal responsively to proximal background noise - In a sound signal adjuster for use in telephone circuitry including a microphone capturing sound to produce a first sound signal and a loudspeaker, a second sound signal representative of a sound in a vicinity of the loudspeaker is obtained, and transitions are detected in the first and second sound signals to determine whether or not the sound in the vicinity of the loudspeaker is blocked. When the blocking is detected, a difference is calculated between a first frequency characteristic detected in response to the sound captured by the loudspeaker being determined as blocked and a second frequency characteristic detected in response to the sound captured by the loudspeaker not being determined as blocked. The difference calculated is used for suppressing a noise component included in the first sound signal. | 07-22-2010 |
| 20100184487 | Sound signal adjustment apparatus and method, and telephone - A telephone with a speaker and a microphone uses the speaker both as an electric-to-acoustic transducer, to reproduce the far end party's voice, and an acoustic-to-electric transducer, to capture external sound in the vicinity of the near end party. From the captured sound signal and the signal picked up by the microphone, a decision unit decides whether or not the external sound is being blocked. When the external sound is blocked, a volume control unit increases the volume of the far end party's voice as reproduced by the speaker. The near end party can accordingly turn up the speaker volume by moving the part of the telephone including the speaker close to the user's ear to block external sound, without having to manipulate any manual controls. | 07-22-2010 |
| 20100178005 | Optical device and mach-zehnder interferometer - There is provided an optical device including a first optical waveguide of a directional coupler, a second optical waveguide connected to the first optical waveguide and which guides light, and a common cladding of the first and second optical waveguides, wherein: the common cladding of the first and second optical waveguides includes a first cladding and a second cladding, the second cladding being provided on the first cladding and having a higher refractive index than the first cladding; the first optical waveguide and the second optical waveguide are formed continuously on the first cladding with a constant width and a constant height and are integrated with each other, and a cross sectional shape of each of the first and second optical waveguides is a rectangular shape that is longest in a direction orthogonal to a surface of the first cladding. | 07-15-2010 |
| 20100150178 | Propagation delay time adjustment method, propagation delay time adjustment system, propagation delay time adjustment device, storage medium stored with propagation delay time adjustment program, and node device - There is provided a propagation delay time adjustment method for adjusting the propagation delay time occurring within a reception circuit for each channel of a center node device configuring a 1-to-N communications system in which communication is performed between the center node device and N (N being an integer of 2 or more) individual edge node devices using a Synchronous Code Division Multiplexing method, the center node device comprising a main control section, and each of the edge node devices comprising an auxiliary control section that controls the propagation delay time in cooperation with the main control section, the transmission delay time adjustment method comprising: transmission permission signal transmitting; transmission controlling; reception phase controlling; reception validity determining; optimum reception phase determining; and reception phase setting in which the main control section sets the optimum reception phase as the reception phase for the reception circuit. | 06-17-2010 |
| 20100149308 | Data processing apparatus and method, and network system - In a network system for sending data to a plurality of terminals, a data processing apparatus has a plurality of coding units that code outgoing data including at least video or voice data for transmission to terminals over a network. The data processing apparatus obtains information about the terminals, groups the terminals according to the information, and transmits the coded outgoing data obtained from each coding unit to a different group of terminals. Appropriate grouping of the terminals conserves both network and coding resources and enables the quality of the data transmitted to the terminals to be improved at a low cost. | 06-17-2010 |
| 20100131096 | Free Sample Distributing System, Free Sample Distributing Device, Free Sample Distribution Information Server, Free Sample Distributing Method, Free Sample Distributing Information Processing Program and Computer Readable Medium - A free sample distributing system comprises a plurality of free sample distributing devices and a free sample distribution information server. Each free sample distributing device imports identification information of a user desiring acquisition of a free sample, and sends the identification information to the free sample distribution information server. The free sample distribution information server decides a type of a free sample to be provided for the user, by searching a user information storage unit, by recognizing personal information of the user pertaining to the identification information, and by comparing the personal information with the free sample distribution conditions of free sample types. The free sample distributing device dispenses the free sample of the decided type from a housing unit and provides the user with the free sample. | 05-27-2010 |
| 20100096894 | Shock absorbing device and chair - A shock absorbing device is provided that includes a cylindrical damper, a compression coil spring disposed around the damper having an axis substantially in line with the axis of the damper, and a cylindrical spring guide disposed around the compression coil spring so as to cover the compression coil spring. | 04-22-2010 |
| 20100092128 | Optical Transceiver module - An optical transceiver module includes a semiconductor laser that emits light along a first optical axis. A grating coupler, located in a plane including the first optical axis, diffracts the emitted light out of the plane and into an external optical system. A photodetector receives incoming light from the external optical system on a second optical axis that passes through the grating coupler at an angle to the plane. The photodetector can be placed parallel to the plane, directly above or below the grating coupler, to create an extremely compact optical transceiver module. | 04-15-2010 |
| 20100086122 | Echo canceller and echo cancelling method and program - An echo canceler uses an adaptive filter to remove an echo of a far-end input signal from a near-end input signal. Filter coefficients are calculated and updated while the far-end signal is active. While the far-end signal is silent, substitute filter coefficients are similarly calculated to be swapped in as initial values for the filter coefficients when the far-end signal changes from silent to active. The substitute filter coefficients are generated from a simulated far-end signal and a simulated near-end signal obtained by combining corresponding samples in different intervals of the far-end and near-end input signals. To facilitate convergence of the substitute filter coefficients, use of the simulated far-end and near-end signals is disabled when the corresponding samples cancel out. | 04-08-2010 |
| 20100085991 | Optical resonator and tunable laser - An optical resonator has a Y-branched waveguide including first, second, and third optical waveguides interconnected at a single point. The first optical waveguide leads toward a reflector. The second and third optical waveguides are optically interconnected by a curved extension of the second and third optical waveguides, or by an independent ring waveguide to which the second and third optical waveguides are directionally coupled. At least one wavelength selector such as a Mach-Zehnder interferometer is formed in one or both of the second and third optical waveguides. This optical resonator is small in size and can be tuned by means of a single parameter. A tunable laser can be formed by inserting an optical amplifier between the first optical waveguide and the reflector. | 04-08-2010 |
| 20100084902 | Link Mechanism for a chair and a chair - There is provided a link mechanism for a chair that is a link mechanism that is used at a chair, the link mechanism for a chair having: a first link whose one end is connected to a bottom surface of a link that supports a seat surface portion of the chair; a second link whose one end is connected to another end of the first link; a first joint portion rotatably connecting the first link and the second link; a second joint portion provided at another end of the second link; and a first elastic resistance unit imparting elasticity in a rotating direction to the second joint portion. | 04-08-2010 |
| 20100083297 | CHANNEL SELECTIVE INFORMATION TRANSMITTING DEVICE, CHANNEL SELECTIVE INFORMATION TRANSMITTING METHOD AND ITS PROGRAM, AND MEMORY MEDIUM - A channel selective information transmitting device is provided for making it possible to carry out the collection of viewing information more accurately even if there is dispersion of viewing channels while suppressing useless facility arrangements. The present invention is directed to a channel selective information transmitting device that transmits channel selective information to inform channels of broadcast signals selected by the users to a viewing information receiving server. The channel selective information transmitting device is provided with a channel change detecting section for detecting channel changes, a transmission waiting time acquiring section for acquiring a transmission waiting time until channel selective information in connection with the changes is transmitted, and a transmitting section for transmitting the channel selective information after a lapse of the acquired transmission waiting time. | 04-01-2010 |
| 20100080564 | Optical phase locked loop - A single sideband modulator uses a radio-frequency signal output by a voltage controlled oscillator to modulate a reference optical signal output by a local light source, thereby obtaining several sideband signals, and combines the sideband signals into a single reproduced optical signal. The optical coupler couples the reproduced optical signal with a received optical signal to generate an optical beat signal, from which a photoelectric transducer and loop filter generate a control voltage for the voltage controlled oscillator. These components operate as an optical phase locked loop that efficiently locks the reproduced optical signal in frequency and phase with the received optical signal by using the energy of all sidebands of the reference optical signal. The phase locked loop is useful for coherent detection of the received optical signal. | 04-01-2010 |
| 20100080118 | Radio network system and control node switching method - A radio network system and a control node switching method which can improve a reliability of the whole network and improve a wording efficiency. The system includes at least one alternate control node which can be substituted form the control node. The alternate control node monitors an operating state in the control node and discriminates whether or not the operating state is abnormal. When the operating state is determined to be abnormal, the alternate control node sets its own address into a control node address. | 04-01-2010 |
| 20100079222 | Coplanar waveguide and fabrication method thereof - A coplanar waveguide includes a signal line formed on a major surface of a high-resistivity silicon substrate, a pair of ground conductors placed on opposite sides of the signal line, and a pair of trenches formed in the substrate between the signal line and the ground conductors. Because of the trenches, the attenuation characteristics of the coplanar waveguide are highly uniform, and are comparable to the attenuation characteristics of coplanar waveguides formed on compound semiconductor substrates. | 04-01-2010 |
| 20100074621 | OPTICAL DIVISION MULTIPLEXING TRANSMISSION AND RECEPTION METHOD AND OPTICAL DIVISION MULTIPLEXING TRANSMISSION AND RECEPTION DEVICE - An OCDM signal generation section generates an encoded optical pulse signal by encoded an optical pulse signal. The encoded optical pulse signal is then inputted to a wavelength disperser and the time waveform of the encoded optical pulse signal is shaped to be outputted as a shaped and encoded optical pulse signal. A WDM signal generation section generates an optical wavelength division multiplexing signal. A OCDM signal extraction section then decodes the OCDM reception signal by using the same code as the time-spreading/wavelength-hopping code for each channel and generates a decoded OCDM reception signal. | 03-25-2010 |
| 20100074617 | Optical pulse time spreading apparatus and optical multiplex transmitting system with multiplexed channels and S/N ratio increased - Super-structured fiber Bragg gratings (SSFBGs) of s optical pulse time spreaders are provided with N unit FBGs disposed starting from an input/output end in the order of first to N-th unit FBGs, where s is a parameter less than or equal to a parameter N, a natural number. The unit FBGs are configured such that the reflectivities of the unit FBGs placed from one end to the center of the SSFBG formed in an optical fiber are monotonically increased, while the reflectivities of the unit FBGs placed from the center to the other end of the SSFBG are monotonically decreased. The chip pulses in a pulse train are given relative phases such that the relative phase of the first chip pulse is equal to zero, the relative phase of the second chip pulse is equal to a phase difference d | 03-25-2010 |
| 20100074291 | Distributed Feedback Semiconductor Laser Device - A DFB laser device which can reduce influence of reflected return light and improve output characteristics and can provide a small-sized and inexpensive optical module when mounted on the optical module. The GC-DFB laser device ( | 03-25-2010 |
| 20100074236 | Wireless communication system, access point, controller, network management device, and method of setting network identifier of access point - There is provided a wireless communication system including: a wireless terminal that communicates information; an access point that performs wireless communication with the wireless terminal; a main server that communicates with the access point through a network and manages line connection of the wireless terminal; and a survival server that communicates with the access point through the network and manages the line connection of the wireless terminal in place of the main server, wherein the access point detects a communication state between the main server and the access point and between the survival server and the access point, and sets a network identifier of the access point according to the communication state, and wherein the wireless terminal performs wireless communication with the access point using the network identifier, and communicates information with the main server or the survival server according to the network identifier. | 03-25-2010 |
| 20100067923 | Optical M-ary modulator - An optical m-ary modulator includes an optical loop forming a polarization maintaining closed optical path. A loop input-output unit splits linearly polarized input signal light into a first component and a second component and feeds the first and second components into the optical loop in opposite directions. A pair of phase modulators modulate the first and second components according to respective control signals. The loop input-output unit recombines the modulated first and second components. The optical phase bias unit creates a phase difference between the first and second components so that they combine to form an m-ary modulated optical signal. Since the first and second components travel around the same optical path, when they recombine their phases are correctly aligned, making the modulator immune to environmental effects and permitting the use of high-speed optical modulation techniques. | 03-18-2010 |
| 20100067550 | Code division multiplex signal transmitter and code division multiplexing method with amplifying circuits reduced in number - N channels of encoded data are added into added data, which is compared with a first threshold of 2 | 03-18-2010 |
| 20100061401 | Dynamic bandwidth allocating method and device with hardware reduced and bandwidth usability improved - In subscriber units | 03-11-2010 |
| 20100059896 | Coplaner waveguide and fabrication method thereof - A coplanar waveguide includes a substrate, a signal line formed on the substrate, a pair of ground conductors formed on the substrate on mutually opposite sides of the signal line, a signal line insulating film disposed between the signal line and the substrate, and a ground conductor insulating film disposed between the pair of ground conductors and the substrate. No corresponding insulating film is present on the substrate between the signal line and the ground conductors. Even if a silicon substrate is used, the attenuation characteristics of the coplanar waveguide are comparable to the attenuation characteristics of coplanar waveguides formed on compound semiconductor substrates. | 03-11-2010 |
| 20100054663 | SPOT SIZE CONVERTER - A spot size converter has a first core, a larger second core, and a clad disposed on a substrate. The first core has a rectilinear cross-sectional shape and is embedded in the clad, except at its ends. One of these ends has a sloping surface along which the thickness of the first core tapers gradually to zero. The second core, which has a refractive index intermediate between the refractive indexes of the first core and clad, sits on the clad and covers the sloping end surface of the first core. Light propagates through the first core, then through the second core into an external optical device, or propagates from an external optical device through the second core into the first core. This arrangement provides a spot size converter having an easily manufacturable structure and no polarization dependency. | 03-04-2010 |
| 20100050765 | MUSCLE TRAINING DEVICE WITH MUSCULAR FORCE MEASUREMENT FUNCTION FOR CONTROLLING THE AXIAL TORQUE OF A JOINT AXLE - A training device measures, after its robot arm is mounted on a trainee, a change in angle of the joint axles of a limb of the trainee with angular sensors. Based on the angular change measured, a controller calculates an angular rate in the direction in which a load is applied, stores as the maximum muscular force a load at the time when the angular rate has exceeded a predetermined value, and stops applying the loads. | 03-04-2010 |
| 20100050050 | Coding system, encoding apparatus, and decoding apparatus - An encoding apparatus includes a systematic encoder that generates information bits and parity bits, both of which are transmitted selectively to a decoding apparatus. At certain points, sufficient bit data are transmitted to identify the state of the systematic encoder. The decoding apparatus partitions the received bits at these identifiable points, and processes each partition separately by predicting the information bits, modifying the predicted information bits according to the received information bits, and using the parity bits to correct errors in the resulting information bits. In video coding, this partitioning scheme can deal flexibly with multiple image formats without requiring extra decoding circuitry. With a parallel decoding apparatus, the number of decoding units operating concurrently can be changed flexibly. The error correcting capability of the decoding apparatus is also improved. | 02-25-2010 |
| 20100046517 | Address translator using address translation information in header area on network layer level and a method therefor - An address translator carries out address translation between a private address and a global address on a source address or a destination address included in the header of a received packet. The translator includes an address translation processor for applying address translation information to the header area of the received packet on a network layer level and carrying out address translation on the network layer level by means of the address translation information. Thus, the translator can establish high transparency, high possibility to establish interconnection, impartial assurance for users, high throughput and high availability, and thus provide open measures minimizing interrupt actions of any communication as well as possible. | 02-25-2010 |
| 20100046503 | CONCENTRATOR FOR SPEECH TELEPHONES AND METHOD OF COMMUNICATION OVER LAN USING SAME - Speech telephones are incorporated in a LAN, and, for example, when a voice telephone | 02-25-2010 |
| 20100044752 | Semiconductor device and manufacturing method - A metal-insulator-semiconductor high electron mobility transistor (MIS-HEMT) has a substrate in which an electron supply layer is interposed between an electron channel layer and the surface of the substrate. A pair of main electrodes are formed on the surface of the substrate. A recess is formed in the surface of the substrate between the main electrodes. A gate insulation film is formed on the surface of the substrate, at least between the first and second main electrodes, covering the inside walls and floor of the recess. A gate electrode is formed on the gate insulation film, filling in the recess. The gate insulation film has a crystal density of at least 2.9 g/cm | 02-25-2010 |
| 20100040216 | Caller information notifier system for use in callback with a callback number different from a caller phone number - In a caller information notifier system, a calling terminal transmits a calling signal having a phone number for callback inserted which is different from the phone number of the calling terminal. When a callback is tried from a called terminal, a communication network server, where the calling signal passes, determines the relationship between the phone number of the calling terminal and the phone number for callback inserted in the calling signal to authenticate the phone number for callback. A terminal which receives the calling signal extracts the phone number for callback from the calling signal and keeps the extracted number as a callback phone number. The callback phone number is, for instance, an FMC service number. The probability of success in reaching a caller is thereby increased. | 02-18-2010 |
| 20100027520 | Transmission terminal, reception terminal, and information distribution system - A transmission terminal includes an information generation unit, a transmission unit, a delivery management unit, and a reception unit. The information generation unit generates information that is to be transmitted to a destination reception terminal. The transmission unit transmits information that the information generation unit has generated. The delivery management unit manages transmission of information. The reception unit receives information that the destination reception terminal transmits. Furthermore, the information generation unit generates or receives transmission information that is to be transmitted to the destination reception terminal and generates redundant information for the destination reception terminal to restore the transmission information. The delivery management unit causes the information generation unit to generate, and causes the transmission unit to retransmit, the redundant information when the reception unit has not received a successful reception reply from the destination reception terminal. | 02-04-2010 |
| 20100021175 | Optical-time-division-multiplexing differential phase shift keying signal generating apparatus - An apparatus detecting an optical carrier phase difference between adjacent optical pulses structuring an OTDM-DPSK signal, by generally-used optical and electrical elements, is provided. An OTDM-DPSK signal generating section has an optical splitter, a first phase modulator, a second phase modulator, an optical coupler, and a monitor signal branching device, and generates and outputs an OTDM-DPSK signal and a monitor signal. An optical carrier phase difference detecting section has an optical carrier interferometer, and an interference signal detecting section including a optical-to-electrical converter and a peak detection circuit. The monitor signal is inputted to the optical carrier interferometer, and an interference monitor signal is outputted. The interference monitor signal is inputted to the optical-to-electrical converter, and an electrical interference monitor signal is outputted. The electrical interference monitor signal is inputted to the peak detection circuit, and an optical carrier phase difference detection signal is generated and outputted. | 01-28-2010 |
| 20100020964 | KEY GENERATION METHOD USING QUADRATIC-HYPERBOLIC CURVE GROUP - Disclosed is a key generation apparatus which uses a finite commutative group defined by a number-theoretical (or arithmetical) function that can be substituted for the elliptic curve, thereby enabling the computational difficulty equivalent to that of breaking the elliptic curve cryptography. The key generation apparatus comprises a key setting part and a key generator. The key setting part sets a secret key α, and selects an element of the finite commutative group as a public key G. The key generator performs an addition operation defined for the finite commutative group on the public key G, thereby to multiply the public key G by the secret key α representing a scalar coefficient to generate a public key Y. The finite commutative group is a set of pairs (x,y) of a dependent variable y of a quadratic-hyperbolic function defined on a finite ring and an independent variable x of the quadratic-hyperbolic function. | 01-28-2010 |
| 20100017208 | INTEGRATED CIRCUIT FOR PROCESSING VOICE - An improved integrated circuit for processing voice (speech) is provided. This is a voice LSI. The voice LSI reduces a voice output level to 0V if a speech segment is silent. This voice LSI can reduce a white noise. | 01-21-2010 |
| 20100002799 | CDM signal transmitter with modulators reduced in number and a method therefor - A code division multiplex signal transmitter includes an operational circuit, a modulator unit and a multiplexer. The operational circuit adds up input transmission data on channels to produce resultant added data and modulates pieces of bit transmission data which are indicative of the values of the respective bits of the added data, when expressed in binary form, the pieces of bit transmission data being equal in number to the M bit positions of the added data expressed in binary form. The modulator unit includes modulators corresponding in number to the M bit positions of the added data in the binary form. A k-th modulator, where k is an integer of 1 to M, inclusive, modulates a k-th piece of bit transmission data to produce a k-th bit modulated signal whose amplitude level is 2 | 01-07-2010 |
| 20090323755 | Optical resonator and laser light source - An optical resonator includes an optical waveguide with a core surrounded by a clad of lower refractive index. The optical waveguide includes a non-terminated ring-type optical waveguide for resonant propagation of light and an input-output optical waveguide, unitarily coupled to the ring-type optical waveguide, for output of light from the ring-type optical waveguide, or input of light to and output of light from the optical ring waveguide. The ring-type optical waveguide and input-output optical waveguide can be formed simultaneously as silicon-wire waveguides. The unitary coupling simplifies fabrication of the optical resonator. | 12-31-2009 |
| 20090317034 | Optical pulse time spreading device for spreading light pulse over time axis - An optical pulse time spreading device includes an optical fiber and a superstructured fiber Bragg grating (SSFBG) formed in the optical fiber. The SSFBG includes unit fiber Bragg gratings (FBGs) having the effective refractive index of the optical fiber periodically varying in the longitudinal direction of the fiber, and phase shifters having a constant effective refractive index. Each unit FBG is arranged between the adjacent phase shifters in the longitudinal direction. The unit FBG having its unit grating length in the longitudinal direction shorter than the unit segment length which is the distance between the unit FBGs next to each other. The optical pulse time spreading device provides the peak intensity of the autocorrelation wave less dependent on a code used for encoding and decoding. | 12-24-2009 |
| 20090315122 | SEMICONDUCTOR DEVICE HAVING OHMIC RECESSED ELECTRODE - The present invention provides a semiconductor device having a recess-structured ohmic electrode, in which the resistance is small and variation in the resistance value caused by manufacturing irregularities is small. In the semiconductor device of the present invention, a two-dimensional electron gas layer is formed on the interface between a channel-forming layer and a Schottky layer by electrons supplied from the Schottky layer. The ohmic electrode comprises a plurality of side faces in ohmic contact with the two-dimensional electron gas layer. At least a part of side faces of the ohmic electrodes are non-parallel to a channel width direction. In a preferred embodiment of the present invention, the side faces have a saw tooth form or a comb tooth form. Since the contact area between the ohmic electrode and the two-dimensional electron gas layer is increased, ohmic resistance is reduced. | 12-24-2009 |
| 20090310490 | Radio communication system - A radio communication system in which radio communication terminals can efficiently transmit and receive data with each other suppressing the amount of data held by each of them. Each radio communication terminal can calculate an average delivery delay time of deliver data based on the degree of proximity to an adjacent radio communication terminal and transmit data delivery path information containing this and, for each data delivery path information received from another radio communication terminal, calculate a total average delivery delay time for delivery to a destination radio communication terminal based on the average delivery delay time contained in the data delivery path information and the average delivery delay time calculated by itself and, in response to the arrival of a data delivery time, transmit deliver data toward the destination radio communication terminal via the delivery path associated with the smallest total average delivery delay time. | 12-17-2009 |
| 20090304178 | Echo canceler - An echo canceller, in which an adder adds a pseudo echo generated by an adaptive filter to an echo, so that the echo and the pseudo echo are canceled to each other, includes: a subband filter ( | 12-10-2009 |
| 20090304026 | Network system for communicating between different IP versions with multiple translators - In a telecommunications network system in which two translators are placed for the conversion of IP version 4 (IPv4)-version 6 (IPv6)-IPv4, one translator converts an IPv4 packet to an IPv6 packet by adding a prefix obtained from a prefix management server managing prefixes to an address contained in an IPv4 packet received from an IPv4 terminal and also converts an IPx6 packet to an IPv4 packet by removing a prefix from the address contained in the IPx6 packet received from the translator. According to the conversion table, the other translator converts the IPv6 packet received from the one translator to an IPv4 packet and an IPv4 packet received from the IPv4 server to an IPv6 packet, thus enhancing the transfer efficiency in the IPv6-IPv4 conversion network. | 12-10-2009 |
| 20090303931 | Wireless communications connection control method - A wireless communications connection control method that enables flexible reconstruction of a wireless communications network system structure. The wireless communications connection control method comprising the steps of retaining in advance a node registration table in which the inter-node distance and node types are associated with each node; issuing a joining notification, together with the inter-node distance, in response to when a new node joins the wireless communications system; refreshing the node registration table according to the joining notification, determining whether it is necessary to change the node type based on the inter-node distance stored in the node registration table, and changing the node type stored in the node registration table when it is determined that the type needs to be refreshed. | 12-10-2009 |
| 20090296730 | Intermittently operable communication apparatus with different carrier sense levels switched between transmission and reception and method therefor - The communication apparatus intermittently carries out receiving operation during a predetermined reception period. The apparatus includes a wireless communication section for carrying out wireless communication, which includes a carrier sensor for sensing a carrier at the beginning of the communication, and a carrier sense switching section for using carrier sense levels different between packet transmission and reception to switch the carrier sense level of the carrier sensor according to the packet. Thus, the apparatus can use and flexibly adjust the optimum carrier sense level for the intermittent receiving operation within the reception period. | 12-03-2009 |
| 20090296725 | Router device for efficient routing with congestion minimized - In a router, a receiver receives a communication packet meant for a communication destination other than this router device. A calculator calculates a cost value for forwarding a communication packet to a destination by each of neighboring routers adjacent to the router. A next-router determiner selects a neighboring router as a next router based on the cost value calculated to supply the determined information and the communication packet to a transmitter, which transmits the communication packet to the destination based on the determined information. The calculator calculates the cost value based on the node degree of the neighboring routers and the number of hops of the communication packet from the neighboring routers to the destination. | 12-03-2009 |
| 20090296724 | Gateway apparatus - A gateway apparatus relays a data packet only when a network that is connected to the gateway apparatus itself is identical to a network that is connected to a node associated with a sender's address. The sender's address is carried in the data packet received. Even if there are accesses from a plurality of nodes to a certain node (e.g., sensor node), the gateway apparatus can relay the data packet such that data retrieval takes place appropriately and/or such that node control takes place appropriately. | 12-03-2009 |
| 20090294889 | Semiconductor device - A semiconductor device according to the present invention includes a semiconductor substrate: a photodiode responsive to a light, which is formed in the semiconductor substrate; at least an interlayer insulating layer formed over the semiconductor substrate, the at least an interlayer insulating layer comprising an upper most insulating layer; at least a conductive wiring layer, comprising an upper most conductive wiring layer formed on the upper most insulating layer; and a first passivation layer formed over the upper-most conductive wiring layer. The upper-most wiring layer is not formed directly above the photodiode. The first passivation layer is made of a permeability-resist material and is not formed directly above the photodiode. | 12-03-2009 |
| 20090278717 | ANALOGUE/DIGITAL CONVERTER - There are provided in a scanning mode: a conversion sequence setting register ( | 11-12-2009 |
| 20090274128 | WIRELESS NETWORK SYSTEM - A radio device, which is the source, transmits a route request packet (RREQ) to a radio device. In response to the route request packet (RREQ), the radio device transmits to the radio device a route setup packet (RSET) including a route Radio Device Radio Device Radio Device Radio Device by looking-up topology information (TPIF). In response to the route setup packet (RSET), the radio device produces a route notification packet (RNTF) and transmits the produced route notification packet (RNTF) to radio devices, and. In response to the route notification packet (RNTF), the radio device, which is the destination, produces a route reply packet (RREP) and transmits the produced route reply packet (RREP) to the radio device, which is the source. | 11-05-2009 |
| 20090268755 | CODEC CONVERTER, GATEWAY DEVICE, AND CODEC CONVERTING METHOD - A codec converter includes: a plurality of codec converting units each configured to convert first encoded media data encoded using a first encoding mode into second encoded media data encoded using a second encoding mode different from the first encoding mode; a media data extracting unit configured to extract input-encoded media data from an input packet, and to generate conversion information that identifies a desired format conversion; a resource allocation unit configured to route the input-encoded media data to a selected one of the plurality of codec converting units based on the conversion information; and a packet reassembling unit configured to receive output-encoded media data from the selected one of the plurality of codec converting units, and to assemble the output-encoded media data into an output packet. Each of the plurality of codec converting units selects a different pair of first and second encoding modes. | 10-29-2009 |
| 20090257750 | Optical code division multiplex communication method, system, and module - An optical communication system uses superstructured fiber Bragg gratings (SSFBGs) to encode and decode an optical pulse signal transmitted between two optical communication devices. Each SSFBG has uniformly spaced fiber Bragg gratings, producing a chip pulse train with a uniform phase difference between chips. The phase difference defines a code. There is one SSFBG at one of the two devices and two or more SSFBGs at the other device, using different codes to encode or decode the same optical signal. Using one code to encode and multiple codes to decode, or multiple codes to encode and one code to decode, provides a high signal-to-noise ratio and permits stable performance despite environmental temperature variations. For bidirectional communication, each communication device has at least three SSFBGs, divided into a transmitting group and a receiving group, mounted on a mounting plate with a negative thermal expansion coefficient. | 10-15-2009 |
| 20090257579 | Echo Canceller - An echo canceller is capable of reducing echo feeling in a conversation even if a tone signal is input. The echo canceller of this invention judges whether a far-end input signal is a calling control tone signal or not, and if that is the case, resets a coefficient of an adaptive filter. An echo canceller of another aspect judges whether a far-end input signal is a predetermined kind of a tone signal or not, and stops the update of the coefficient of the adaptive filter if the result is affirmative and an amount of echo cancellation is not larger than a threshold value. Further, when the tone signal ends, the echo canceller compares amounts of echo cancellation before and after the end of the tone signal, in accordance with a result of the comparison, restart the update of the coefficient of the adaptive filter after resetting the coefficient of the adaptive filter, or restarts the update of the coefficient of the adaptive filter without resetting the coefficient of the adaptive filter. Moreover, notch filters may be provided to eliminate a tone signal frequency component at input stages of the adaptive filter and the adder for echo cancellation. | 10-15-2009 |
| 20090252496 | COMMUNICATION NETWORK USING CODE DIVISION MULTIPLEXING TECHNOLOGY - A communication network which can use communication bandwidth effectively. Spreading codes of a first and a second code length are assigned for every communication terminal interfaces connected to the same communication network. The spreading codes of the first code length are used for data communications. The spreading codes of the second code length are used for the control communications between the interfaces and the sever. The interfaces and the server receives mixed signals of the data and the control signals. When the received signals are decoded using the spreading code of the first code length, control signal components became equal to or lower than the noise level. When the received signals are decoded using the spreading code of the second code length, data components became equal to or lower than the noise level. Therefore, the interfaces and the server can extract one of these signal components. | 10-08-2009 |
| 20090252155 | REDUNDANT GATEWAY SYSTEM - First and second gateway devices perform TDM conversion on data from multiple packets supplied from the packet networks to generate TDM signals. A TDM exchange unit switches to the first gateway device from the second gateway device to supply the TDM network with only the TDM signal generated by the first gateway device. When the TDM exchange unit switches to the first gateway device from the second gateway device, a jitter buffer controller of the second gateway device notifies the first gateway device of the packet read order determined by the jitter buffer controller of the second gateway device, and the first gateway device determines a packet read order as the packet read order determined by the jitter buffer controller of the second gateway device. | 10-08-2009 |
| 20090245372 | Decoding system and method - A decoding system generates a predicted image, receives error correcting information encoding an original image, and uses the predicted image and the error correcting information to carry out a multi-stage decoding process that reconstructs the original image by correcting prediction errors in the predicted image. This process uses correlation information representing an assumed correlation between the predicted image and the original image. As the decoding process proceeds, the correlation information is updated to reflect assumed or inferred changes in the correlation between the predicted image and the original image. Updating the correlation information permits more efficient coding by enabling the original image to be reconstructed to an acceptable level of image quality with less error correcting information. | 10-01-2009 |
| 20090245247 | COMMUNICATION TERMINAL AND COMMUNICATION NETWORK - Routing schemes are provided for a communication network. In one scheme, destination terminals and associated neighboring terminals are listed in a routing control cache at each communication terminal in the network, and packets are routed toward the destination terminal through the associated neighboring terminals. In another scheme, a single path from a source terminal to a destination terminal is automatically expanded into multiple paths. In yet another scheme, packets are routed as long as this does not increase the number of hops to the destination terminal. These schemes enable multiple paths to be established by a simple procedure not requiring complex distance calculations. In still another scheme, routing is restricted to the shortest path and paths up to a given number of hops longer than the shortest path, permitting paths to diverge in multiple directions from the source and destination terminals. | 10-01-2009 |
| 20090242937 | Semiconductor device and manufacturing method - A semiconductor device has source and drain electrodes formed on a substrate, a gate insulation film formed on the substrate between the source and drain electrodes, and a gate electrode formed on the gate insulation film. These elements are all covered by a dielectric sub-insulation film. An opening is formed in the sub-insulation film, partially exposing the gate electrode. A field plate extends from the top of the gate electrode down one side of the gate electrode as far as the sub-insulation film covering the gate insulation film, filling the opening. The thickness of the sub-insulation film can be selected to optimize the separation between the field plate and the substrate for the purpose of reducing current collapse by reducing electric field concentration at the edge of the gate electrode. | 10-01-2009 |
| 20090240489 | Voice band expander and expansion method, and voice communication apparatus - A band-limited voice signal is processed to reduce its spectral envelope or harmonic structure, or both. The resulting reduced signal is moved into a frequency band above the upper limit frequency of the band-limited voice signal, and then combined with the band-limited voice signal to form a band expanded signal with improved quality and comprehensibility, free of unnatural high-frequency resonances and unnaturally strong high-frequency harmonics. | 09-24-2009 |
| 20090238270 | Apparatus and method for modifying predicted values, and decoding system - An apparatus for modifying predicted values in a predicted image for input to a decoder starts by taking the most significant information bit plane from the predicted image and submitting it to the decoder to be decoded. Subsequent information bit planes are then taken in descending order and submitted to the decoder, but first each of these information bit planes is modified at the locations of prediction errors identified in the preceding information bit plane by comparing that information bit plane with the corresponding decoded bit plane. The modifications improve the general accuracy of the decoded image, enabling the decoder to decode the bit planes with less additional coded information than would otherwise be required. The apparatus is useful in distributed video coding systems. | 09-24-2009 |
| 20090238088 | NETWORK TRAFFIC ANALYZING DEVICE, NETWORK TRAFFIC ANALYZING METHOD AND NETWORK TRAFFIC ANALYZING SYSTEM - A network traffic analyzing device accurately analyzes traffic of a communications network. The traffic analysis device includes a real time monitoring unit configured to collect information regarding communication data between a primary network and an access network from a traffic collecting device in real time; an alert managing/notifying unit that generates an alert regarding traffic between the primary network and the access network based on the information collected in real time by the traffic collecting device; and an alert generation cause analyzing unit that analyzes a cause of the alert generated by the alert managing/notifying unit based on information regarding at least one of normal data and abnormal data transmitted and received between the primary network and the access network prior to generation of the alert by the alert managing/notifying unit. | 09-24-2009 |
| 20090233638 | Radio communications apparatus and a method for reestablishing a network with a join signal transmitted at variable timing - A radio communications apparatus includes a network position detector for detecting information on the position of the communication device on a radio telecommunications network, a network connection detector for detecting the disengagement of the device from the network, and a controller for controlling the transmission timing of join signals. The controller is adapted to vary a transmission timeout period, upon expiring of which a join signal is sent out, depending on the information about the positions on the network. The radio communications device is thus able to decrease the probability of occurrence of collision to thereby reduce the time taken for reestablishing the network. | 09-17-2009 |
| 20090232499 | Passive optical network communication method and system - A passive optical network communication system transmits an optical time-division multiplexed signal from a central office through a passive optical coupler to a number of subscribers, and transmits optical encoded signals from the subscribers through the passive optical coupler to the central office. Optical encoded signals from different subscribers are separated by a decoding process performed at the central office. All operations can be synchronized with a clock signal which is generated at the central office and recovered from the optical time-division multiplexed signal by the subscribers' equipment. The communication range can be extended inexpensively by using a single high-power light source at the central office while using relatively low-power light sources at the subscribers' equipment. | 09-17-2009 |
| 20090232297 | Echo canceler and echo canceling method - An echo canceler uses an adaptive filter to remove an echo of an incoming far-end signal from an outgoing near-end signal in the presence of ambient noise, updating the filter coefficients while the far-end signal is active and the near-end signal is inactive. The near-end and far-end signals are also sampled to obtain data vectors, which are averaged to generate simulated near-end and far-end signals, from which substitute filter coefficients are calculated and updated while the far-end signal is silent, the substitute filter coefficients being used when the far-end signal becomes active again. The number of data vectors averaged is varied according to the ratio of echo power to ambient near-end noise power, or according to the echo attenuation ratio, thereby speeding up convergence of the filter coefficients. Data sampled while the near-end and far-end signals are both active are excluded from the updating process. | 09-17-2009 |
| 20090231428 | Surveillance apparatus and program - A surveillance apparatus capable of connecting via a communication network with a video recording device that records a video signal output from at least one surveillance camera and obtains surveillance camera trouble information pertaining to the surveillance camera detected by the video recording device. The surveillance apparatus comprises a timetable storage unit in which a timetable compiled based upon a monitoring target operating-hours schedule is stored, a trouble information judging unit that judges surveillance camera trouble information obtained during monitoring target operating hours to be valid and judges surveillance camera trouble information obtained at a time outside the monitoring target operating hours to be invalid based upon the timetable and a trouble information reporting unit that reports the surveillance camera trouble information having been judged to be valid. The structure allows the surveillance camera trouble information to be reported in an optimal manner. | 09-17-2009 |
| 20090222250 | Hard/Soft Cooperative Verifying Simulator - The present invention provides a hard/soft cooperative verifying simulator based on a SystemC simulator, capable of reducing overhead of context switching control thereby to shorten processing time. Time keepers for controlling simulation times of a plurality of threads are provided corresponding to the threads generated as simulation models for hardware and software. Each of the time keepers has a variable which holds a simulation time for each thread, a variable which holds a summation time, and a break request queue which stores a break time and its corresponding break method therein. The time keeper manages both variables and the queue in response to six types of method invocations from the thread, and invokes a wait function of the SystemC simulator when necessary. It is thus possible to reduce the number of times that a wait function invocation is performed, and shorten the entire processing time. | 09-03-2009 |
| 20090220232 | Code division multiplex communication system - A code division multiplex (CDM) communication system transmits frames including a preamble and its end bit pattern followed by a CDM signal and its end bit pattern in respective time slots. A clock recovery device at the receiving end recovers a clock signal from the preamble during the preamble time slot and continues to output the clock signal in free run mode during the CDM signal time slot. The clock signal is used to gate the output of a decoder that decodes the received signal, so that the decoded CDM signal is output as a received data signal. The preamble is a bi-level signal, so an ordinary clock recovery device can be used. | 09-03-2009 |
| 20090219922 | Exchange system and server device - An exchange apparatus serves a plurality of telephone terminals and a server device is connected to the exchange apparatus via an exchange network and that, in a case in which the plurality of telephone terminals are grouped, stores in association and administers, for each group, a different single number and identification information of the at least one telephone terminal belonging to the group. When a call is originated with a predetermined single number from an originating side telephone terminal, the exchange apparatus performs a query to the server device for a connection destination corresponding to the predetermined single number, and implements a call connection between a telephone terminal of a connection destination, which is a result from the server device in response to the query, and the originating side telephone terminal. | 09-03-2009 |
| 20090219608 | WAVELENGTH CONVERSION DEVICE AND WAVELENGTH CONVERSION METHOD - A wavelength conversion device that obtains, from an input light, a wavelength-converted light with a wavelength shift by a wavelength shift amount of Δλ is disclosed. The device comprises first and second wavelength converters. The first wavelength convertor shifts a central wavelength of a first wavelength-converted light by a first wavelength shift amount of Δλ1 relative to a central wavelength of an input light. The second wavelength convertor shifts a central wavelength of a second wavelength-converted light by a second wavelength shift amount of Δλ2 relative to a central wavelength of the first wavelength-converted light. The first wavelength shift amount of Δλ1 and the second wavelength shift amount of Δλ2 satisfy Δλ1+Δλ2=Δλ. | 09-03-2009 |
| 20090214218 | Optical buffer device - An optical buffer device includes plural optical memory elements that are capable of holding light and an optical delay element. The plural optical memory elements are arranged on an optical path through which signal light and control light propagate in mutually opposite directions. Further, the optical delay element is disposed between the optical memory elements that are adjacent to each other. The optical delay element imparts different delays to the signal light and the control light. According to a preferred exemplary embodiment of this optical buffer device, each of the optical memory elements includes an optical waveguide through which the signal light and the control light propagate and an optical resonator that is disposed in proximity to this optical waveguide, and a coupling between the optical waveguide and the optical resonator is generated or cancelled depending on whether or not the control light is inputted. | 08-27-2009 |
| 20090214015 | Addressee information notification system, addressee information notification method, application server and communication terminal - An addressee information notification system includes an application server which, based on an addressee number requested by an incoming call connection request, selects one transfer destination terminal from plural alternative transfer destination terminals associated with the addressee number, and transfers the call connection request to the selected terminal, and plural terminals configured as alternative transfer destinations. The application server includes an addressee information attachment section that attaches addressee information in the form of the addressee number or identification information associated with the addressee number to the call connection request to be transferred to the selected terminal. At least one of the plural terminals has an addressee information output section that, when a call connection request is provided to that terminal from the application server, outputs the addressee information attached to the call connection request before the terminal is taken off-hook. | 08-27-2009 |
| 20090213970 | Intermittent operative communication apparatus adaptively controlling the timing of waiting data reception and a method therefor - An intermittent operative communication apparatus can send data, received from a source communication device, to any receiver communication device at a predetermined interval and wait for receiving data at the predetermined interval. The communication apparatus has a selector for selecting one or multiple receiver communication devices as a reference communication device that gives a reference timing at which the communication apparatus waits for receiving data, and a timing controller for setting a timing, at which the communication apparatus waits for receiving data, to a timing according to operation of any reference communication device. | 08-27-2009 |
| 20090212324 | HETEROJUNCTION FIELD EFFECT TRANSISTOR - An aspect of the invention provides a heterojunction field effect transistor that comprises: a base; a first GaN channel layer formed on the base; an AlN electron supply layer formed on the first GaN layer, and a second GaN cap layer formed on the AlN layer. | 08-27-2009 |
| 20090210411 | Information Retrieving System - A user speech analyzing component poses, to a user, question sentences for respective ones of a plurality of attributes, and analyzes an attribute value for each of the attributes from an answer sentence from the user to the sentence question. A user data holding component, as a result of analysis, holds user data that allows the plurality of attributes, and respective user attribute values for the attributes to correspond to one another. A matching component, when an acquisition ratio of the attribute values from the user with respect to all of the attributes is a predetermined value or greater, selects at least one target data candidate that matches each of the attributes and each of the attribute values of the user data, from a plurality of target data. A dialogue control component outputs each of the target data candidates selected, to the user's side. | 08-20-2009 |
| 20090209750 | Organic compound synthesizer and method for synthesizing organic compounds - An organic compound synthesizer for synthesizing organic compounds contains at least one type of polymerizable repeat unit and includes a substrate for organic compound synthesis. A liquid supply unit is configured to supply a reaction liquid containing compounds necessary for the synthesis of organic compounds and a reaction liquid containing a thermal acid generator for generating protons by heating. A substrate heater is configured to selectively heat a specific portion of said substrate for organic compound synthesis to thereby heat the reaction liquid containing a thermal acid generator. | 08-20-2009 |
| 20090208213 | Code division multiplex signal receiving apparatus and code division multiplex transmitting and receiving system - In a code division multiplex transmitting and receiving system, the transmitting apparatus inserts a clock signal in the code division multiplex signal. The clock signal has a frequency equal to a null frequency in the frequency spectrum of the code division multiplex signal. The receiving apparatus extracts this frequency component from the received signal and recovers the clock signal, using an ordinary clock recovery device of the type designed to recover a clock signal from a bi-level signal. The recovered clock signal is used as a synchronizing signal in the processing of the received signal. | 08-20-2009 |
| 20090208211 | Optical communications network and intensity adjustment method for optical communications network - An optical communications network in which one optical line terminal is connected to multiple optical network units and in which code division multiplexing communication is carried out between the optical line terminal and the optical network units. The optical intensities of upstream optical signals transmitted from each optical network unit are made constant at the time of multiplexing by an optical directional coupler, and the optical intensity of a downstream optical signal received by an optical network unit and an upstream optical signal received by the optical line terminal is contained within a dynamic range. Each optical network unit is provided with a variable optical attenuator that is common for an upstream optical signal and a downstream optical signal. The upstream optical signal and the downstream optical signal are attenuated by an equal attenuation. Moreover, the optical line terminal controls the attenuation at the variable optical attenuator. | 08-20-2009 |
| 20090207251 | PERSONAL AUTHENTICATION METHOD AND PERSONAL AUTHENTICATION DEVICE - A personal authentication method and device capable of creating iris information enabling personal authentication even if the iris image shows light reflection. The personal authentication device comprises an imaging section for imaging an eye of the user, an iris code generating section for generating an iris code from the captured image, a determining section for comparing the iris code with a registered iris code and determining whether or not the iris code agrees with the registered code, a control section for giving an instruction to retry imaging when there is no match, a guiding section for guiding the user so that the position where there is light reflection in the iris in retry-imaging changes, an average calculation image creating section for extracting an iris image from images, if the iris code generated from the image captured by retry-imaging disagrees with the registered iris code and creating an average calculation image produced by averaging the pixel values of the iris image, and an iris code generation instruction section for instructing the iris code generating section to generate an iris code from the average calculation image. | 08-20-2009 |
| 20090202247 | Optical multiplexing/demultiplexing device - In an optical multiplexing/demultiplexing device are arranged in parallel and disposed on a substrate. The optical multiplexing/demultiplexing device is disposed with three or more Mach-Zehnder interferometers between the first and second optical input/output ports. The optical multiplexing/demultiplexing device divides, by wavelength, multiplexed light comprising first light and second light whose wavelengths are different and which are input to one of the first optical input/output ports and outputs the multiplexed light from each of the second optical input/output ports. The absolute value of an optical path difference ΔL of each the Mach-Zehnder interferometers is constant. The optical multiplexing/demultiplexing device includes one or more each of a pair of two successive Mach-Zehnder interferometers where the sum of their optical path differences becomes +2 ΔL or −2 ΔL and a pair of two successive Mach-Zehnder interferometers where the sum of their optical path differences becomes 0. | 08-13-2009 |
| 20090202246 | Passive optical network communication system - A passive optical network communication system includes a number of subscribers' units connected to a central line termination unit through a passive optical coupler. The line termination unit includes a first section that transmits and receives a code division multiplex (CDM) signal, a second section that transmits and receives a time division multiplex (TDM) signal, and a wavelength multiplexing filter that combines the transmitted CDM and TDM signals into a single downstream optical signal, and separates the CDM and TDM components of an upstream signal received from the subscribers' units through the passive optical coupler. The CDM signal provides channels for digital video transmission to CDM-capable subscribers' units. | 08-13-2009 |
| 20090201906 | Wireless transmitter device and method thereof for keeping the total transmission time limited - A wireless transmitter device has a predetermined upper limit of an accumulated data transmission time per predetermined duration corresponding to a predetermined maximum value. The wireless transmitter device includes a timer which starts keeping time when the wireless transmitter device sends a wireless signal and stops when it reaches a timeout value, a total transmission measurer for measuring the data transmission time of the wireless transmitter device during a period from the timer starting to stopping, and a transmission controller for refraining the data transmission at the earliest until the time being measured by the timer reaches the timeout value if the accumulation time is, or likely to be, equal to or larger than a threshold value. | 08-13-2009 |
| 20090195860 | Optical modulator and optical signal generation apparatus - An optical modulator includes, a first polarization separation and combination portion, a second polarization separation and combination portion, a first polarization plane-maintaining optical fiber, a second polarization plane-maintaining optical fiber, a third polarization plane-maintaining optical fiber of which a first end is coupled with the second input and output terminal of the second polarization separation and combination portion, the third polarization plane-maintaining optical fiber including a first optical coupler, to which control light that is linearly polarized light is input, a fourth polarization plane-maintaining optical fiber of which a first end is coupled with the third input and output terminal of the second polarization separation and combination portion; and a first polarization plane conversion portion that optically communicates with a second end of the third polarization plane-maintaining optical fiber and a second end of the fourth polarization plane-maintaining optical fiber. | 08-06-2009 |
| 20090193477 | Data providing system - A data providing system in which program deliverers store programs and deliver the stored programs to requesting subscriber terminals has a program allocation control unit that allocates new programs or qualified programs to multiple program deliverers, then selectively deletes the programs from the program deliverers. This allocation scheme assures that even newly added programs can be transmitted efficiently to the subscriber terminals. | 07-30-2009 |
| 20090190927 | OPTICAL CODE DIVISION MULTIPLEXING TRANSMISSION AND RECEPTION METHOD AND OPTICAL CODE DIVISION MULTIPLEXING TRANSCEIVER - An object of the present invention is to provide an OCDM transceiver with which the reduction amount of the intensity of the correlation waveform signal is smaller than that of a conventional device of the same type in the decoding step that comprises a time gate processing step. Hence, in the OCDM transceiver of the present invention that comprises an encoding portion and a decoding portion, the decoding portion is constituted comprising a decoder, clock extractor, and time gate. The decoder decodes an encoded optical pulse signal and separates the encoded optical pulse signal into a clock signal extraction signal and an optical pulse signal playback signal. The clock extractor extracts a clock signal from the clock signal extraction signal. Further, the time gate removes only the auto-correlation waveform component from the optical pulse signal playback signal. The auto-correlation waveform component is converted to an electrical signal by means of an optical receiver and generated as a reception signal. | 07-30-2009 |
| 20090190608 | Communication apparatus and method for controlling communication channel used - A sender communication device includes a communication unit for sending a communication signal to a receiver communication device, and a communication controller for controlling setting of communication channels used for the communication unit as well as for setting, when sending the communication signal, a sending period of the communication signal substantially not shorter than a receive confirmation period of all communication channels in the receiver communication device. A receiver communication device includes a communication unit for receiving the communication signal sent from the sender communication device while switching over plural communication channels, and a communication controller for controlling switching of the communication channels and for setting a communication signal receive-waiting opportunity, in which a first communication channel is used, substantially higher than a receive-waiting opportunity, in which a second communication channel is used. It is thus possible to avoid radiowave interference while saving electric power and lowering delay. | 07-30-2009 |
| 20090185503 | NETWORK TRAFFIC ANALYZING DEVICE, NETWORK TRAFFIC ANALYZING METHOD AND NETWORK TRAFFIC ANALYZING SYSTEM - A network traffic analyzing device accurately analyzes traffic of a communications network. The traffic analysis device includes a real time statistic information setting/managing unit for collecting information regarding communication data between a primary network and an access network from a traffic collecting device in real time. The device also includes a real time statistic information monitoring unit, an alert condition setting unit for alerting one or more conditions regarding the information collected from the traffic collecting device in real time, and an alert managing/notifying unit for generating an alert regarding traffic between the network and the access network based upon one or more alert conditions. | 07-23-2009 |
| 20090180393 | Sampling apparatus distinguishing a failure in a network even by using a single sampling and a method therefor - A network analyzer includes a sampler and a network anomaly detector. The sampler acquires communication data flowing through nodes by a data collector, estimates a topology of the nodes based on the acquired communication data by a topology estimator, stores the estimated topology of the nodes in a storage, reads out the estimated result from the storage to generate a predetermined item for each read-out topology of the nodes as a sampling rule by a rule generator, and samples the supplied communication data based on the generated sampling rule by a packet sampler. The topology of the network is thereby estimated in advance to narrow down objects to be sampled. The behavior of the communication data can thus be grasped in correlation between a target network and other networks. | 07-16-2009 |
| 20090176449 | Out-of-Band Signal Generator and Frequency Band Expander - An out-of-band signal generator for generating, from a band-limited signal with a limited frequency band, an out-of-band signal including a frequency component outside the limited frequency band, having a frequency structure estimating means for estimating the frequency structure of the band-limited signal, an out-of-band source signal generating means for generating an out-of-band source signal including an out-of-band frequency component from the band-limited signal, a frequency structure adjusting means for adjusting the frequency structure of the out-of-band source signal according to the estimated frequency structure of the band-limited signal, and a component extracting means for extracting a prescribed band in the out-of-band source signal with the adjusted frequency structure. | 07-09-2009 |
