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Nippon Telegraph And Telephone Corporation
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Nippon Telegraph And Telephone Corporation patents


Recent patent applications related to Nippon Telegraph And Telephone Corporation. Nippon Telegraph And Telephone Corporation is listed as an Agent/Assignee. Note: Nippon Telegraph And Telephone Corporation may have other listings under different names/spellings. We're not affiliated with Nippon Telegraph And Telephone Corporation, we're just tracking patents.

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Encoding method, decoding method, encoder apparatus, decoder apparatus, and recording medium for processing pitch periods corresponding to time series signals

In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity... Nippon Telegraph And Telephone Corporation

Device for detecting malware infected terminal, system for detecting malware infected terminal, detecting malware infected terminal, and program for detecting malware infected terminal

A detection device generates an event sequence from events that are acquired for each of identifiers that distinguish among terminals in a monitoring target network or pieces of malware, by taking into account an order of occurrence of the events. The detection device retrieves events that commonly occur in event... Nippon Telegraph And Telephone Corporation

Encoding apparatus, decoding apparatus, and methods, programs and recording media for encoding apparatus and decoding apparatus

An encoding apparatus is an encoding apparatus for encoding a time-series signal for each of predetermined time sections in a frequency domain, wherein a parameter η is a positive number, the parameter η corresponding to a time-series signal is a shape parameter of generalized Gaussian distribution that approximates a histogram... Nippon Telegraph And Telephone Corporation

Wireless communication system and wireless communication method

A wireless communication system includes distributed units communicating with a terminal device and a central unit connected to the distributed units and receiving and processing signals from the distributed units. The central unit includes a host function unit to pre-notify the distributed units if a received signal from the terminal... Nippon Telegraph And Telephone Corporation

Name identification device, name identification method, and recording medium

A name identification device includes a generation unit configured to generate graph information in which each node represents one of names and IP addresses included in A records and CNAME records included in a DNS response observed in a network, and each edge represents a correspondence relationship between one and... Nippon Telegraph And Telephone Corporation

Encoding method, decoding method, encoder apparatus, decoder apparatus, and recording medium for processing pitch periods corresponding to time series signals

In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity... Nippon Telegraph And Telephone Corporation

Encoding method, decoding method, encoder apparatus, decoder apparatus, and recording medium for processing pitch periods corresponding to time series signals

In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity... Nippon Telegraph And Telephone Corporation

Control device, border router, control method, and control program

When an attack is detected, a controller samples an attack-target addressed DNS reply, received by a border router, from each of the border routers. Then, the controller adds the transmission-source IP address of the sampled DNS reply to the black list of the border router. Furthermore, upon reception of any... Nippon Telegraph And Telephone Corporation

Security measure invalidation prevention device, security measure invalidation prevention method, and security measure invalidation prevention program

A security measure invalidation prevention device includes an acquisition unit that acquires invalidated security point information about an invalidated security point among security points each having a measure function performing a security measure on a node connected to a network. The invalidated security point has a measure function to be... Nippon Telegraph And Telephone Corporation

Multi-stage interferometer circuit with waveform shaping function

A multi-stage interferometer circuit of the present invention includes: a multiplexing port; (N-1) stages of lattice type two-beam interferometers, wherein each stage includes a two-beam delay circuit having a path length difference of an integral multiple of M·Δ L/2, and wherein the two-beam delay circuit of the lattice type two-beam... Nippon Telegraph And Telephone Corporation

Communication partner correspondence relationship collecting device, communication partner correspondence relationship collecting method, and communication partner correspondence relationship collecting program

A communication partner correspondence relationship collecting device includes a communication partner specifying unit that specifies a subject communication partner whose correspondence relationships are to be collected; a DNS query transmission controller that controls a DNS client such that the DNS client transmits a DNS query to the subject communication partner... Nippon Telegraph And Telephone Corporation

Design apparatus, design method, and recording medium

In CDN, a design apparatus for designing a probability that a delivery server or a delivery route is selected for content delivery in response to a delivery request from a user includes a parameter input unit configured to receive, as input parameter values, a parameter related to the network and... Nippon Telegraph And Telephone Corporation

Wireless communication system and wireless communication method

A wireless user equipment performing wireless communication in a primary and a secondary frequency bands, a first wireless access point AP performing the wireless communication in the primary frequency band, and a second wireless base transceiver station BTS performing the wireless communication in the secondary frequency band are included. The... Nippon Telegraph And Telephone Corporation

Satellite signal reception characteristic estimation apparatus, method thereof, and program thereof

A satellite signal reception characteristic estimation apparatus includes a satellite orbital information collection unit that collects and outputs orbital information for a satellite; a peripheral environment spatial information collection unit that collects spatial information for a peripheral environment of an installation position of a satellite antenna; a positional information collection... Nippon Telegraph And Telephone Corporation

Inconsistency detecting method, inconsistency detecting system, inconsistency detecting device, and program

An inconsistency in shares is detected with a small volume of communications traffic. n inconsistency detecting devices generate random numbers si and make the random numbers si public. The n inconsistency detecting devices generate a common random number s which is the sum total of the random numbers s0, .... Nippon Telegraph And Telephone Corporation

Electroabsorption modulator integrated distributed feedback laser with integrated semiconductor optical amplifier, and driving same

The present invention relates to a driving method for an SOA integrated EA-DFB laser monolithically-integrating a DFB laser portion, an EA modulator portion and an SOA portion, on a same substrate, wherein an electric current ISOA is injected into the SOA portion within a range of a power consumption not... Nippon Telegraph And Telephone Corporation

Estimation device, estimation method, and recording medium

An estimation device measures a number of DNS requests for each domain name and for each IP address in observed flows, measures a total number of the flows, and total amounts of data; estimates a relationship between the amount of data for each IP address corresponding to a node, and... Nippon Telegraph And Telephone Corporation

Quality-of-experience optimization system, quality-of-experience optimization apparatus, recommend request apparatus, quality-of-experience optimization method, recommend request method, and program

A quality-of-experience optimization system configured to optimize quality (QoE: Quality of Experience) that a user experiences in a content distribution service, including: a recommend request apparatus configured to output a distribution parameter candidate of content distribution for optimizing QoE of content distribution, and to receive a distribution parameter for optimizing... Nippon Telegraph And Telephone Corporation

Wireless communication system, wireless communication method, wireless lan access point, and wireless lan station

A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station... Nippon Telegraph And Telephone Corporation

Malware analysis system, malware analysis method, and malware analysis program

A malware analysis system includes a preliminary analysis unit, a determination unit, and a designation unit. The preliminary analysis unit executes malware obtained as a candidate for an analyzing subject to obtain information related to communication transmitted from the malware. The determination unit determines whether the malware is handled as... Nippon Telegraph And Telephone Corporation

Malicious communication pattern extraction device, malicious communication pattern extraction system, malicious communication pattern extraction method, and malicious communication pattern extraction program

A malicious communication pattern extraction device includes: a statistical value calculation unit that calculates a statistical value for an appearance frequency of each of plural communication patterns, from a traffic log obtained from traffic caused by malware, and a traffic log obtained from traffic in a predetermined communication environment; a... Nippon Telegraph And Telephone Corporation

Moving image encoding device

A computation unit subtracts a prediction image from an input image. An orthogonal transformation unit applies orthogonal transformation to an output of the computation unit. A quantization unit quantizes an output of the orthogonal transformation unit. An encoding unit encodes an output of the quantization unit. A prediction mode determination... Nippon Telegraph And Telephone Corporation

Random number generation apparatus, random number generation method and program

A random number acquiring unit 15 obtains a first sequence that comprises values of digits of a random number represented by a binary number as elements. A logical product arithmetic unit 16 obtains a third sequence that is results of elementwise logical product operation between the first sequence and a... Nippon Telegraph And Telephone Corporation

Highly reliable path accommodation design apparatus and method

Accommodation design for wavelength and sub-λ paths in a communication network is performed. If sub-λ path accommodation is possible according to search for a wavelength path present in a single-hop logical route, the accommodation in the wavelength path is executed. If sub-λ path accommodation is possible according to search for... Nippon Telegraph And Telephone Corporation

Leakage prevention apparatus, leakage prevention method and program

An assumed use permission range storage stores a predetermined assumed use permission range. An unavailable state storage stores an information asset in an unavailable state by encryption. An available state storage stores an information asset in an available state by decryption. A leakage-concerned state storage stores an information asset in... Nippon Telegraph And Telephone Corporation

Key exchange method, key exchange system, key device, terminal device, and program

A random number generating unit generates random numbers s1, s2, s′1, and s′2. A public keys randomizing unit generates first randomized public keys information obtained by randomizing public keys using the random number s1 and second randomized public keys information obtained by randomizing the public keys using the random number... Nippon Telegraph And Telephone Corporation

Evaluation device, evaluation method and recording medium

An evaluation device includes a first evaluator configured, for each record used for transmission control of data circulating in a network, to evaluate extent of variation of an amount of the data, based on a history of the amounts of the data matching a condition of the record; a second... Nippon Telegraph And Telephone Corporation

Communication speed estimation apparatus, communication speed estimation method, and program

A communication speed estimation apparatus configured: to generate communication log information representing history of communication executed by a user, and store the communication log information in a communication history information storage unit; to calculate, based on the stored communication log information, throughput result information for each of a server, a... Nippon Telegraph And Telephone Corporation

Secret falsification detecting system, secret computation apparatus, secret falsification detecting method, and program

Falsification is detected during secret computation that uses a plurality of types of secret sharing. A secret computation apparatus 1 uses shared values [a0], . . . , [aM-1] as inputs, and a function value [F([a0], . . . , [aM-1])] obtained with a function F for performing secret computation... Nippon Telegraph And Telephone Corporation

Framer and framing method

A framer in a transmission device that allocates time slots of an optical channel to a logical path, divides client signals received via the logical path to the time slots allocated to the logical path, and transmits the client signals by a plurality of optical suhcarriers using optical wavelengths correlated... Nippon Telegraph And Telephone Corporation

Swept light source and controlling the same

Provided is a swept light source including one end surface coupled to a wavelength filter constituted of a diffraction grating and an end mirror via a light deflector and another end surface including a gain medium facing an output coupling mirror and which configures a laser cavity between the end... Nippon Telegraph And Telephone Corporation

Video quality estimation device, video quality estimation method, and video quality estimation program

A video quality estimation apparatus used for an encoded video, to estimate a video quality value being a value quantifying a video quality being quality of the video felt by a user when viewing and listening to the video. The apparatus includes a maximum value calculator to calculate a maximum... Nippon Telegraph And Telephone Corporation

Time synchronization device, and method and program therefor

A time synchronization method that is capable of selecting whether synchronization, by a timepiece unit that generates a time signal synchronized with a standard time and outputs it to an exterior, with the time is performed by time information obtained by receiving a radio wave including information relating to the... Nippon Telegraph And Telephone Corporation

Proxy computing system, computing apparatus, capability providing apparatus, proxy computing method, capability providing method, program, and recording medium

A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than... Nippon Telegraph And Telephone Corporation

Bioelectrode and garment

A bioelectrode includes a fitting member (1106) formed by an electrically insulating member fixed on a surface of a garment (1100) that comes in contact with a living body (1000), an electrode part (1101a) formed by a conductive member fixed on a surface of the fitting member (1106) that comes... Nippon Telegraph And Telephone Corporation

11/23/17 / #20170336696

Optical modulator

The present invention provides an optical modulator including a substrate and a phase modulation portion on the substrate. The phase modulation portion includes an optical waveguide comprised of a first clad layer, a semiconductor layer that is laminated on the first clad layer and has a refraction index higher than... Nippon Telegraph And Telephone Corporation

11/23/17 / #20170339171

Malware infected terminal detecting apparatus, malware infected terminal detecting method, and malware infected terminal detecting program

A detecting apparatus generates a collection of events, the collection being formed based on a predetermined condition, from events obtained for each identifier identifying a terminal in a monitoring target network or a piece of malware. The detecting apparatus then extracts, from a cluster formed of collections of events, the... Nippon Telegraph And Telephone Corporation

11/23/17 / #20170339183

Optimization apparatus, optimization method, and optimization program

An optimization apparatus collects cyber attack information that is information related to a cyber attack, and system information that is information related to an entire system including a device that has received the cyber attack. Based on the collected cyber attack information and system information, the optimization apparatus identifies an... Nippon Telegraph And Telephone Corporation

11/16/17 / #20170329962

Identification device, identification method, and identification program

A command server identification device adds a tag to data received by malware upon execution of the malware, the tag capable of uniquely identifying identification information for a transmission source of the data, and tracks propagation of the data added with the tag. The command server identification device acquires a... Nippon Telegraph And Telephone Corporation

11/09/17 / #20170324472

Framer and framing method

A framer in a transmission device allocates plural optical channel time slots to a plurality of logical prioritized paths. It allocates received client signals to the allocated time slots, and transmits the client signals by a plurality of optical subcarriers that use a plurality of optical wavelengths corresponding to the... Nippon Telegraph And Telephone Corporation

11/09/17 / #20170324496

Optical transport system and resource optimization method

In the optical transport system a transport frame generator divides a transport frame accommodating plural client signals into plural transmission signals. Subcarrier transmission units convert the signals into optical signals using different optical carriers and transmit the converted optical signals. Subcarrier reception units receive the transmitted optical signals and convert... Nippon Telegraph And Telephone Corporation

10/26/17 / #20170308688

Analysis apparatus, analysis system, analysis method, and analysis program

An analysis apparatus analyzes access logs including authentication results and authentication information of users, and includes: a calculation unit that calculates a similarity between pieces of authentication information in two consecutive access logs when access logs of the same access source, from the access logs, are chronologically arranged, and presumes... Nippon Telegraph And Telephone Corporation

10/26/17 / #20170310473

Secure computation system and relay device, and method, program, and recording medium thereof

A relay device transfers a plurality of original data fragments corresponding to a plurality of secret sharing values of original data to a plurality of secure computation devices, transfers, to each of the secure computation devices, a request to send a result fragment based on a secure computation result corresponding... Nippon Telegraph And Telephone Corporation

10/26/17 / #20170310694

Malicious communication pattern extraction apparatus, malicious communication pattern extraction method, and malicious communication pattern extraction program

A malicious communication pattern extraction apparatus extracts communication patterns of traffic group of malwares, and replaces the values of predetermined field with variation in a traffic group with a wild card. Further, the malicious communication pattern extraction apparatus classifies pieces of malware having similar communication patterns in the traffic group... Nippon Telegraph And Telephone Corporation

10/26/17 / #20170310996

Image encoding method, image decoding method, image encoding apparatus, image decoding apparatus, image encoding program, and image decoding program

An image encoding/decoding apparatus for performing encoding/decoding while predicting an image between different views using a reference image for a view different from a processing target image and a reference depth map which is a depth map for an object of the reference image when a multi-view image including images... Nippon Telegraph And Telephone Corporation

10/26/17 / #20170310997

Image encoding method, image decoding method, image encoding apparatus, image decoding apparatus, image encoding program, and image decoding program

An image encoding/decoding apparatus for performing encoding/decoding while predicting an image between different views using a reference image for a view different from a processing target image and a reference depth map which is a depth map for an object of the reference image when a multi-view image including images... Nippon Telegraph And Telephone Corporation

10/19/17 / #20170302437

Nondecreasing sequence determining device, method and program

Determination as to whether a nondecreasing sequence exists or not is efficiently made. A sorting part sorts elements of a set Pi in ascending order to generate vectors ti,i+1 and A merging part generates vectors t0,m and b0,m by repeating the process of merging vectors (ti,j, bi,j) and (ti,k, bi,k)... Nippon Telegraph And Telephone Corporation

10/19/17 / #20170302442

Device, method and program for detecting positions of partial character strings

The positions in a text in which partial character strings in a pattern appear are efficiently detected. A partial-character-string position detecting device 1 takes inputs of a secret text [t] of a text t, a secrete text <p> of a pattern p, a secret text <c> of a vector c,... Nippon Telegraph And Telephone Corporation

10/19/17 / #20170302445

Key exchange method and key exchange system

Plurality of users share a common key while permitting dynamic member change and computational complexity required for key exchange is reduced. The first key generation unit 212 of the communication devices Ui computes Ri and ci, or ci based on a twisted pseudo-random function. A session ID generation unit 113... Nippon Telegraph And Telephone Corporation

10/12/17 / #20170293477

Analysis device, analysis method, and analysis program

A program analysis unit of a browser emulator manager exhaustively searches a code by performing syntax analysis of a code included in web content to search a transfer code to another site or a content acquisition code, and specifies at least any of an object and a function and a... Nippon Telegraph And Telephone Corporation

10/05/17 / #20170281021

Heartbeat detection method and heartbeat detection device

A heartbeat detection device includes a difference value calculation unit (3) for calculating, from a sampling data sequence of an electrocardiographic waveform of a living body, one of an amount of change and a degree of change of sampling data for each sampling time, a multiplication unit (4) for calculating,... Nippon Telegraph And Telephone Corporation

10/05/17 / #20170286692

Vulnerability finding device, vulnerability finding method, and vulnerability finding program

A vulnerability finding device has a vulnerability extracting unit, a normalization processing unit, and a matching unit. The vulnerability extracting unit extracts a first program code corresponding to a vulnerable part of software. The normalization processing unit performs normalization of a parameter included in the first program code extracted by... Nippon Telegraph And Telephone Corporation

10/05/17 / #20170287444

Display control device, display control method, and display control program

A display control device (10) detects change of a screen, and executes, depending on the detected change of the screen, any one or both of provisional update processing that generates a strip-shaped rectangular region extended in a vertical direction or a horizontal direction based on the position of an icon... Nippon Telegraph And Telephone Corporation

09/28/17 / #20170277579

Annotation apparatus, annotation method, and annotation program

An annotation apparatus includes an annotation DB, a screen state acquisition monitor unit, and an external collaboration program call unit. The annotation DB stores therein an annotation object and an annotation rule applicable to each of windows of the annotation object in an associated manner. The screen state acquisition monitor... Nippon Telegraph And Telephone Corporation

09/21/17 / #20170272167

Station-side apparatus in optical transmission system, optical transmission system, and optical transmission method

An OLT (1) is formed by N optical transceivers (11), one PON control circuit (12), and one selection and distribution circuit (13). An optical transceiver selection control signal (SC) is transferred from the PON control circuit (12) to the selection and distribution circuit (13). The optical transceiver selection control signal... Nippon Telegraph And Telephone Corporation

09/21/17 / #20170272766

Encoding apparatus, decoding apparatus, and method and program for the same

There are provided an encoding or decoding technique capable of performing more efficient encoding or decoding than before. An encoding apparatus for encoding a time-series signal in a frequency domain is provided with: a spectral envelope estimating portion 2A estimating a spectral envelope, regarding absolute values of a frequency domain... Nippon Telegraph And Telephone Corporation

09/14/17 / #20170258351

Heartbeat detection method and heartbeat detection device

A heartbeat detection device includes a peak search unit (4) for searching for one of a peak at which a value M obtained from a sampling data sequence of an electrocardiographic waveform of a living body changes from an increase to a decrease and a peak at which the value... Nippon Telegraph And Telephone Corporation

09/07/17 / #20170257169

Framer, optical transmission device, and framing method

There is provided a tray which is connected to a plurality of transmitters that multicarrier-transmit a plurality of parallel signals by optical subcarriers. The framer selects time slots to be allocated to a path to be accommodated such that the number of optical subcarriers corresponding to the time slots satisfies... Nippon Telegraph And Telephone Corporation

08/31/17 / #20170249947

Frequency domain parameter sequence generating method, encoding method, decoding method, frequency domain parameter sequence generating apparatus, encoding apparatus, decoding apparatus, program, and recording medium

The present invention reduces encoding distortion in frequency domain encoding compared to conventional techniques, and obtains LSP parameters that correspond to quantized LSP parameters for the preceding frame and are to be used in time domain encoding from coefficients equivalent to linear prediction coefficients resulting from frequency domain encoding. When... Nippon Telegraph And Telephone Corporation

08/17/17 / #20170237232

Burst optical signal transmission device and burst optical signal transmission method

A burst optical signal transmission device which includes a light source for generating and outputting burst signal light, a light source driving circuit for outputting, to the light source, a driving signal for switching between an output time and a stop time of the burst signal light, based on a... Nippon Telegraph And Telephone Corporation

08/10/17 / #20170228539

Control device, control system, control method, and control program

A cloud controller performs, when an attack on a VM in any of data centers in a system is detected, setting of NAT of a private IP address of a VM(A), for a boundary router of each data center other than a data center that the VM(A) belongs to, the... Nippon Telegraph And Telephone Corporation

08/10/17 / #20170224244

Biological signal measurement system, biological information measurement apparatus, and biological information extraction algorithm changing method

In a biological signal measurement system of this invention, biological digital data is generated from a biological signal measured by a biological signal measurement apparatus, and first feature amount data extracted from the biological digital data and downsized biological digital data are transmitted to a portable terminal. In a biological... Nippon Telegraph And Telephone Corporation

08/10/17 / #20170228265

Log analysis apparatus, log analysis system, log analysis method and computer program

Techniques for extracting a set of highly correlated logs without user's prior knowledge of generation rules of logs generated by a machine. A log analysis apparatus includes: a template storage unit configured to store templates for log messages; a template determination unit configured to determine templates corresponding to log messages... Nippon Telegraph And Telephone Corporation

08/10/17 / #20170228541

Browser emulator device, construction device, browser emulation method, browser emulation program, construction method, and construction program

A browser emulator is caused to emulate a client environment that is arbitrary values of types and versions of an OS, a browser, and a plugin. Further, the browser emulator monitors execution of a script or a plugin. A browser emulator manager then causes the browser emulator to patrol a... Nippon Telegraph And Telephone Corporation

08/10/17 / #20170230396

Network system

A control apparatus performs analysis by using partial information and determines whether or not communication is abnormal. If the communication is determined to be abnormal, the control apparatus controls a communication route for a communication control device such that the communication is transmitted from a communication apparatus to the control... Nippon Telegraph And Telephone Corporation

Patent Packs
08/03/17 / #20170223040

Identifying device, identifying method and identifying program

An identifying device monitors malware to be analyzed and acquires, as log data, the malware, download data downloaded from a communication destination, and a relation of data transfer performed with the malware or the communication destination of the download data. Then, the identifying device creates, by using the acquired log... Nippon Telegraph And Telephone Corporation

07/27/17 / #20170215083

Wireless communication system, wireless communication method, cooperation control apparatus, terminal apparatus, and licensed band base station apparatus

A wireless communication system includes a plurality of terminal apparatuses that perform communication using a first frequency band in which communication based on a random access scheme is performed and a second frequency band which is different from the first frequency band, a first base station apparatus that performs communication... Nippon Telegraph And Telephone Corporation

07/20/17 / #20170206355

Dynamically-loaded code analysis device, dynamically-loaded code analysis method, and dynamically-loaded code analysis program

A dynamically-loaded code analysis device includes a memory unit, an extraction unit, and a specification unit. The memory unit memorizes dynamically-loaded code information indicating a class structure of a dynamically-loaded code and call method information in which tag information added to user information is associated with a class structure of... Nippon Telegraph And Telephone Corporation

07/20/17 / #20170206356

Information processing system, controlling method, and controlling computer program

A virtual machine includes a shadow memory, a shadow disk, and a virtual NIC. A virtual machine includes a guest OS. The shadow memory and the shadow disk each store therein pieces of data and pieces of tag information assigned to the pieces of data, so as to be kept... Nippon Telegraph And Telephone Corporation

07/20/17 / #20170207875

Optical communication system, station-side device, subscriber device, and optical communication method

An optical communication system of the present invention switches a communication wavelength from a current communication wavelength to a auxiliary communication wavelength when an abnormality occurs in a communication wavelength between a station-side device and any one of a plurality of subscriber devices. Further, this optical communication system switches a... Nippon Telegraph And Telephone Corporation

07/13/17 / #20170199331

Optical fiber splicing structure

An optical fiber splicing structure of the invention includes: an optical fiber connector that is capable of holding an optical fiber at both sides thereof in a radial direction; a receiving optical fiber that is provided inside the optical fiber connector and has a hole opening at an end face... Nippon Telegraph And Telephone Corporation

06/29/17 / #20170184803

Optical fiber ribbon and optical fiber cable housing optical fiber ribbon

Provided is an optical fiber ribbon capable of achieving higher density and reduction in diameter and accurately placing optical fibers in V-shape grooves in a fusion machine without failure. The optical fiber ribbon 1 includes three or more of optical fibers 2 arranged in parallel and connecting portions 3 connecting... Nippon Telegraph And Telephone Corporation

06/29/17 / #20170185578

Information analysis system, information analysis method, and information analysis program

An information analysis system includes a remark analysis unit, a thread analysis unit, and a storing unit. The remark analysis unit analyzes importance of a remark included in a thread serving as a group of remarks posted on a network, based on remark data serving as data relating to the... Nippon Telegraph And Telephone Corporation

06/29/17 / #20170186255

Security system, management apparatus, permission apparatus, terminal apparatus, security method and program

At the time of setting authority, a management apparatus stores a database in which authority information corresponding to authority to physically drive a drive apparatus, which is a tangible object, using a terminal apparatus, and registration identification information corresponding to a subject that is given the authority are associated, and... Nippon Telegraph And Telephone Corporation

06/22/17 / #20170178659

Coding method, device, program, and recording medium

A coding technology that efficiently codes an input sound signal irrespective of the characteristics thereof and can obtain a decoded sound signal that sounds less artificial to a listener. A coding method codes an input sound signal frame by frame of a predetermined time segment by a selected coding processing... Nippon Telegraph And Telephone Corporation

06/22/17 / #20170180078

Base station apparatus, wireless communication system, and communication method

A base station apparatus includes at least one remote unit apparatus including at least one antenna; and a central unit apparatus connected to each remote unit via a transmission path. The remote antenna receives a wireless transmission signal from at least one wireless terminal including at least one antenna. The... Nippon Telegraph And Telephone Corporation

06/22/17 / #20170180157

Base station apparatus, wireless communication system, and communication method

A base station apparatus is provided with at least one remote unit apparatus each including at least one antenna, and a central unit apparatus connected to each remote unit apparatus via a transmission path. The antenna provided in the remote unit apparatus receives a transmission signal wirelessly transmitted from at... Nippon Telegraph And Telephone Corporation

06/15/17 / #20170170923

Wdm/tdm-pon system and transmission start time correction method thereof

A transmission start time correction method of a WDM/TDM-PON system includes: a completion instruction procedure in which a station-side subscriber accommodation apparatus issues an instruction using a downstream signal for instructing a subscriber apparatus to perform wavelength switching, the downstream signal including a transmission start time of an upstream signal... Nippon Telegraph And Telephone Corporation

06/08/17 / #20170160466

Multicore fiber and manufacturing multicore fiber

A multicore fiber includes a plurality of unit multicore fibers each including: a plurality of core portions; and a clad portion which is formed in an outer circumference of the core portions and has a refractive index lower than a maximum refractive index of the core portions. The plurality of... Nippon Telegraph And Telephone Corporation

06/01/17 / #20170155669

Detection device, detection method, and detection program

An unauthorized-access detection device in which when a relationship between information regarding a request transmitted from a terminal operated by a user to a service server that provides a service, which is acquired by a request acquisition unit, and information regarding a query transmitted from the service server to a... Nippon Telegraph And Telephone Corporation

Patent Packs
05/25/17 / #20170146742

Optical waveguide device and module

In a waveguide device, unnecessary optical power is appropriately terminated. According to an embodiment of the present invention, the waveguide device has a termination structure filled with a light blocking material to terminate light from a waveguide end. In the termination structure, a cladding and a core are removed to... Nippon Telegraph And Telephone Corporation

05/25/17 / #20170149808

Network system, control apparatus, communication apparatus, communication control method, and communication control program

A control apparatus performs analysis by using partial information and determines whether or not communication is abnormal. If the communication is determined to be abnormal, the control apparatus controls a communication route for a communication control device such that the communication is transmitted from a communication apparatus to the control... Nippon Telegraph And Telephone Corporation

05/18/17 / #20170139148

Method of manufacturing optical connector, optical connector, and optical fiber insertion device

A method of manufacturing an optical connector according to the invention includes: holding a first optical fiber by a pair of holding members at a position apart from an end face of a second end and through both sides thereof in a radial direction, the first optical fiber being provided... Nippon Telegraph And Telephone Corporation

05/04/17 / #20170123162

Optical fiber connector

An optical fiber splicer includes a fiber fixing portion, a first optical fiber fixed to the fiber fixing portion, a clamp portion which is capable of holding and fixing an extending portion extended from the fiber fixing portion of the first optical fiber and a tip portion of a second... Nippon Telegraph And Telephone Corporation

05/04/17 / #20170126714

Attack detection device, attack detection method, and attack detection program

An attack detection device including a packet collection unit that collects packets to be transmitted from a user terminal to a service providing server, a header-information acquisition unit that acquires header information from the packets, and an attack detection unit that determines whether each session is an attacking session by... Nippon Telegraph And Telephone Corporation

05/04/17 / #20170126715

Detection device, detection method, and detection program

A detection device includes a data-propagation tracking unit that gives communication data a tag including attribute information associated with communication destination information of the communication data and tracks propagation of communication data on which the tag including the attribute information is given, and a falsification detection unit that detects falsification... Nippon Telegraph And Telephone Corporation

05/04/17 / #20170126724

Log analyzing device, attack detecting device, attack detection method, and program

A device including: a parameter extracting unit that extracts each parameter from an access request, a character-string class converting unit that, with regard to each parameter, compares each part of a parameter value with a previously defined character string class, replaces the part with a longest matching character string class,... Nippon Telegraph And Telephone Corporation

05/04/17 / #20170127079

Video encoding device and video encoding method

Before completion of merge encoding processing of an immediately preceding PU, a controller determines the order of evaluation of merge candidates with the immediately preceding PU excluded from the merge candidates to be evaluated, and a merge-candidate derivation part evaluates each merge candidate in the order of evaluation. After the... Nippon Telegraph And Telephone Corporation

04/27/17 / #20170115451

Optical fiber cable

[Solution] An optical fiber cable includes: a plurality of optical fiber units each including a plurality of optical fibers and a bundling member wound around an outer periphery of a bundle of the plurality of optical fibers, the bundling member having a surface to which a water-absorbent granular substance is... Nippon Telegraph And Telephone Corporation

04/27/17 / #20170115461

Optical fiber ribbon and optical fiber cable housing optical fiber ribbon

Provided is an optical fiber ribbon capable of achieving higher density and reduction in diameter and accurately placing optical fibers in V-shape grooves in a fusion machine without failure. The optical fiber ribbon 1 includes three or more of optical fibers 2 arranged in parallel and connecting portions 3 connecting... Nippon Telegraph And Telephone Corporation

04/27/17 / #20170117961

Light modulation device and light modulation method

A light modulation device detects a power of the modulated optical signal modulated by each of an I-component optical modulator and a Q-component optical modulator, synchronously-detects a component of a frequency fd from the power of the modulated optical signal, outputs a dither signal of a frequency fd/n (where n... Nippon Telegraph And Telephone Corporation

04/20/17 / #20170108652

Method of splicing optical fiber and optical fiber splicing device

A method of splicing an optical fiber of the invention splices a first optical fiber cable and an optical fiber in a splicing box, the first optical fiber cable is a drop cable or an indoor cable, the optical fiber is drawn from a second optical fiber cable, the method... Nippon Telegraph And Telephone Corporation

04/20/17 / #20170111116

Transport apparatus and transport method

A transport apparatus includes: a client signal transceiving unit which transceives a client signal; a line signal transceiving unit which performs electric-optic conversion on a line signal to be transmitted, transmits an optical line signal, performs optic-electric conversion on a received line signal, and outputs an electrical line signal; and... Nippon Telegraph And Telephone Corporation

04/20/17 / #20170111165

Proxy computing system, computing apparatus, capability providing apparatus, proxy computing method, capability providing method, program, and recording medium

A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than... Nippon Telegraph And Telephone Corporation

04/13/17 / #20170104582

Proxy computing system, computing apparatus, capability providing apparatus, proxy computing method, capability providing method, program, and recording medium

A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than... Nippon Telegraph And Telephone Corporation

04/13/17 / #20170104583

Proxy computing system, computing apparatus, capability providing apparatus, proxy computing method, capability providing method, program, and recording medium

A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than... Nippon Telegraph And Telephone Corporation

04/06/17 / #20170098074

Malware determination device, malware determination system, malware determination method, and program

A malware determination device, in which, upon input of an attribute name and an attribute value of an attribute of an executable file, a feature-selection setting unit registers the attribute with the attribute name in an attribute table as an attribute to be extracted, and registers the attribute value as... Nippon Telegraph And Telephone Corporation

03/30/17 / #20170092283

Encoding method, encoder, program and recording medium

In an encoding method that is expected to produce a smaller code amount out of a periodicity-based encoding method and a non-periodicity-based encoding method, the amount of code or an estimated value of the amount of code of an integer value sequence is obtained while adjusting gain. In the other... Nippon Telegraph And Telephone Corporation

03/09/17 / #20170068048

Polarization rotator

Polarization rotators of conventional techniques require forming a silicon nitride layer, which is not employed in usual fabrication of a silicon waveguide circuit. In order to employ a polarization rotator function in an optical integrated circuit, a process of forming a silicon nitride layer is added just for that purpose.... Nippon Telegraph And Telephone Corporation

03/09/17 / #20170070296

Optical signal transmission apparatus and optical signal transmission method

An optical signal transmission apparatus includes a modulation unit which modulates a transmission signal, a training signal sequence generation unit which generates a plurality of signal sequences having power concentrated in a plurality of different frequency bands, at least one of an amplitude and a phase of the plurality of... Nippon Telegraph And Telephone Corporation

03/09/17 / #20170070520

Website information extraction device, system, website information extraction method, and website information extraction program

A malicious URL candidate extraction device extracts, from an access log including URLs accessed from a managed network, a known malicious URL excluded access log obtained by excluding an access log to known malicious URLs. The malicious URL candidate extraction device creates a minor URL list obtained by preferentially extracting,... Nippon Telegraph And Telephone Corporation

03/09/17 / #20170070751

Image encoding apparatus and method, image decoding apparatus and method, and programs therefor

When multiview images are encoded, a first viewpoint-synthesized image for an encoding target region is generated by using a reference viewpoint image from a viewpoint other than that of the encoding target image and a reference depth map for the reference viewpoint image. A second viewpoint-synthesized image for reference pixels... Nippon Telegraph And Telephone Corporation








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