| Patent Number |
Title Of Patent |
Date Issued |
| 6975624 |
Network interworking device for LAN/internet |
December 13, 2005 |
| A network interworking device used in a communication system which has a first communication network with an IP, a second communication network and a plurality of other network interworking devices connected to the first communication network, the network interworking device being connec |
| 6856650 |
Method and apparatus for second or later generation coding of video signal |
February 15, 2005 |
| At second or later generation coding of video signal in tandem video coding, at least one coding parameter of previous coding is estimated in accordance with picture properties of the input video signal, and the estimated coding parameter in the previous coding is used in the second or |
| 6456617 |
Routing control communication system between circuit switched network and internet |
September 24, 2002 |
| A routing control communication system includes a circuit switched network provided with a service control information database having a telephone numbers table, an interconnection network provided with a network communication protocol and an information terminal, and a network inter |
| 6445478 |
Optical pulse position detecting circuit and an optical pulse generating apparatus and their met |
September 3, 2002 |
| Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an opt |
| 6324166 |
Call setup control apparatus in ATM switch |
November 27, 2001 |
| A call setup control apparatus has a first calculation unit for calculating an objective value of cell loss ratio P.sub.B (u) of a buffer B.sub.u in priority class u which is equal to or lower than a priority class k (u=k to K), based upon parameters of an average cell rate R(k,j), an ob |
| 6317534 |
Optical wavelength routing device |
November 13, 2001 |
| An optical wavelength routing device comprises an arrayed waveguide comprising a plurality of channel waveguides formed on a substrate, a plurality of input waveguides having 12 input ports located on an input side of the arrayed waveguide, a plurality of output waveguides having 16 |
| 6292603 |
Dispersion compensation device |
September 18, 2001 |
| A dispersion compensation device comprises a chirped grating, and a first optical unit for guiding at least a lightwave signal with a wavelength of .lambda..sub.i that needs a positive dispersion compensation and is applied thereto to one end portion of the chirped grating whose grating |
| 6239834 |
Apparatus for evaluating digital picture quality |
May 29, 2001 |
| An apparatus for evaluating digital picture quality, includes a SNR calculation module for calculating a SNR based upon differences between data of video picture to be evaluated and data of original video picture, a module for calculating a power of AC component of overall data of one of |
| 6236488 |
Optical pulse position detecting circuit and an optical pulse generating apparatus and their met |
May 22, 2001 |
| Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an opt |
| 6178450 |
Method and apparatus for monitoring a communication link based on TCP/IP protocol by emulating b |
January 23, 2001 |
| A method and apparatus for monitoring a communication link based on TCP/IP protocol obtains a protocol data unit (PDU) between communication systems. A emulation log is produced by analyzing the PDU in a PDU analysis part. An event sequence log is produced by estimating an event sequence |
| 6154506 |
Timing recovery and tracking method and apparatus for data signals |
November 28, 2000 |
| A timing recovery and tracking method and apparatus with respect to data signal in a digital communication system is provided. The method includes a step of setting a time window for making a decision based upon a predetermined threshold level, the time window having a time period co |
| 6147974 |
Apparatus for monitoring state of traffic in telecommunication network |
November 14, 2000 |
| An apparatus for monitoring state of traffic in a telecommunication network by calculating ABR based upon BID and ANS per unit time in the network. This apparatus includes a model generation unit for receiving sampled data for generating models, the sampled data being constituted by a se |
| 6108380 |
Method and apparatus for deciding optimum orthogonal transform mode |
August 22, 2000 |
| When a selective decision of the field mode/frame mode for orthogonal transform is made for each macroblock composed of a plurality of blocks in a motion picture coding system wherein coding of an interlaced TV signal proceeds in the frame structure and an orthogonal transform is made in |
| 6107961 |
Map display system |
August 22, 2000 |
| A map display system includes a plurality of geographic information servers, a geographic information search server and clients, connected to each other through network. The geographic information search server searches a plurality of geographic information servers and generates a co |
| 6092113 |
Method for constructing a VPN having an assured bandwidth |
July 18, 2000 |
| An IP tunnel is constructed between routers connected with the INTERNET. A bandwidth of the IP tunnel is assured by setting up a reservation resource protocol (RSVP) on the IP tunnel. Further as a traffic control of the routers and on the IP tunnel, a frequency for sending packets, which |
| 6081838 |
Method for access control on MIB in OSI management |
June 27, 2000 |
| The managed object instance is used as access control unit, then access denial and permission are quickly decided. After a pre-process to the naming tree which is an object of access control, MOI included within every scope which can be designated by the management operation is obtai |
| 6078913 |
Document retrieval apparatus |
June 20, 2000 |
| A document retrieval apparatus is connected to a network, and includes a cluster database storing a cluster of node information elements linked for clustering the documents to a hierarchical tree structure based on degree of similarity in all of the documents. The apparatus can post to a |
| 6076164 |
Authentication method and system using IC card |
June 13, 2000 |
| A method and system for authenticating between a user or client and a network access entity such as a server or another client using an IC card. The method includes a step of executing an initial authentication using the IC card when the user first communicates with the network access |
| 6061352 |
ATM cell receiver system with source clock recovery |
May 9, 2000 |
| A cell disassemble circuit in a cell receiver system detects the number of lost cells from information for detecting cell loss included in received cells, and separates a payload from a header in each of the received cells. The number of lost cells indicates the number of cells lost on a |
| 6023571 |
System for filtering events occurred within a predetermined period of time |
February 8, 2000 |
| A system for filtering events which have occurred within a predetermined period of time includes a first generation unit for generating association rules between the events (parameters) which simultaneously occur within the predetermined period of time, a second generation unit for gener |
| 6002931 |
Interworking apparatus for roaming among different mobile networks |
December 14, 1999 |
| An interworking apparatus for roaming among a plurality of mobile network having different inter-network signaling protocols is connected to the plurality of mobile networks and has a database record for holding network identity information for identifying a mobile network to which at le |
| 5978456 |
Charging unit price determination/information apparatus and communication system having charging |
November 2, 1999 |
| A calling location and a receiving location are analyzed by called party number analysis means by processing a called party number for specifying a communication terminal at the receiving side transmitted by a communication terminal at the calling side is processed, a charging unit p |
| 5978353 |
Multiplex terminal station apparatus |
November 2, 1999 |
| A service-system low-speed interface unit and a protection-system low-speed interface unit are each provided with an optical transmitting/receiving module adapted to communicate signals with a main terminal. The protection-system low-speed interface unit is provided with another opti |
| 5974082 |
Spread spectrum communications system |
October 26, 1999 |
| A spread spectrum communications system includes at least one communication station for transmitting a plurality of digital information data sequences via a plurality of communication channels by using the same PN code sequence. The communication station spreads the respective digital |
| 5960176 |
Apparatus for management of SNMP/OSI gateways |
September 28, 1999 |
| The gateway apparatus for SNMP/OSI management enables that an SNMP manager manages an OSI management agent, by using a basic conversion of a management operation and a management information between SNMP and CMIP and by using a cache, a replica and a link object. |
| 5940131 |
Method and apparatus for coding moving pictures |
August 17, 1999 |
| A method for coding moving pictures using motion compensation for prediction has a step of producing motion vectors for a macroblock in a previous frame, the macroblock corresponding to a macroblock to be coded in a current frame, a step of motion-compensating the macroblock in the p |
| 5933821 |
Method and apparatus for detecting causality |
August 3, 1999 |
| A causality detection apparatus for detecting causality of events based upon a database provided with log of the events includes a sorter module for generating an event list by sorting in time sequence the events, and a frequency analysis module for calculating, based upon the event list |
| 5907563 |
Error control method and apparatus for wireless data communication |
May 25, 1999 |
| An error control method for wireless data transmission over a digital mobile communication system includes a step of obtaining, during data communication, statistical information including transmission error information at a receiving side, a step of determining an error control stra |
| 5889861 |
Identity confidentiality method in radio communication system |
March 30, 1999 |
| The radio communication system has at least one first radio station such as a base station and a plurality of second radio stations such as mobile stations. The base station at least possesses a public key, and each of the mobile stations possesses a public-key cryptography function for |
| 5883589 |
Variable length code construction apparatus |
March 16, 1999 |
| An apparatus for constructing a variable length code includes a unit for producing a unique word consisting of continuous N "0" bits, a prefix processing unit for producing a codeword including at least one "1" bit, the prefix of the codeword having continuous "0" bits with a length equa |
| 5881154 |
Data scramble transmission system |
March 9, 1999 |
| A data scramble transmission system with a data transmission link coupled between sending and receiving ends is provided. The link adopts transmission frames each of which is constituted by data and control bits periodically added to the data. The system includes a scramble unit loca |
| 5875425 |
Speech recognition system for determining a recognition result at an intermediate state of proce |
February 23, 1999 |
| A speech recognition system for recognizing a system user's speech can shorten a recognition period by reducing the amount of necessary calculations without deteriorating the accuracy rate of recognition. The speech recognition system successively calculates statistical probabilities |
| 5870728 |
Learning procedure for multi-level neural network |
February 9, 1999 |
| A reiterative learning procedure with training and test processes for a binary supervised neural network includes at least an error signal generator for weighting factor updating in the training process, which generates an error signal that is perturbed in polarity and amplitude in t |
| 5854612 |
Method and apparatus for controlling array antenna |
December 29, 1998 |
| A method of controlling an array antenna having a plurality of antenna elements for providing antenna output signals by receiving TDMA burst signals. The method includes a step of estimating a DOA of incident signal based upon the antenna output signals, a step of calculating weights wit |
| 5841476 |
Coding apparatus for encoding motion picture |
November 24, 1998 |
| A motion picture coding apparatus for searching a plurality of proposed coding modes and/or parameters, for selecting a suitable coding mode and/or a suitable parameter, and for encoding motion pictures using the selected coding mode and/or parameter. The apparatus includes a measuring |
| 5838689 |
Cell Receiver |
November 17, 1998 |
| A cell receiver includes, in addition to a cell decomposing unit, an interleaving memory, an error correcting unit, a FIFO memory, and a delay fluctuation absorption control unit, a delay fluctuation absorption buffer for absorbing delay fluctuation of a received cell, and a buffer contr |
| 5832462 |
Electronic dealing system for performing automatic matching between order side and hit side cust |
November 3, 1998 |
| A electronic dealing system (EDS), implemented on a general purpose computer used in processing transactions, establishes, manages and updates values of credit lines not only between individual customers but also between groups of customers or between one customer and one group of other |
| 5774462 |
Unique word recognition system |
June 30, 1998 |
| In a time division multiplex (TDM) signal in which a symbol is sent one by one periodically, a unique word in the TDM signal is recognized quickly in a receiving station. A receive station has essentially N number of correlators each having a specific unique word pattern. A unique word |
| 5768476 |
Parallel multi-value neural networks |
June 16, 1998 |
| In a parallel multi-value neural network having a main neural network 16 and a sub neural network 18 coupled with the main neural network 16 in parallel for an input signal, the main neural network 16 is trained with a training input signal by using a main multi-value teacher signal, and |
| 5764860 |
Learning method for multi-level neural network |
June 9, 1998 |
| A learning method supervised by a binary teacher signal for a binary neural network comprises at least an error signal generator 10 for weighting factor updating, which generates an error signal for weighting factor updating having an opposite polarity to that of a difference signal |
| 5761309 |
Authentication system |
June 2, 1998 |
| An authentication system whereby authentication load can be distributed in the network without sharing secret information of users is provided.The system has a single master authentication center arranged in the network, the master authentication center sharing with the user a user secre |
| 5751703 |
Energy dispersal method for TDMA carrier |
May 12, 1998 |
| In a radio communication system using time division multiple access system (TDMA) for access control method, modulation signal sent by a slave station is frequency-dispersed during a TDMA burst period by using a chirp signal which frequency changes continuously on time axis so that signa |
| 5740318 |
Speech endpoint detection method and apparatus and continuous speech recognition method and appa |
April 14, 1998 |
| A speech endpoint detection unit determines that a first condition is met when a matching score of a partial sentence accepted by a grammatical rule unit is the highest of all partial sentences, and that a second condition is met when a duration time of input speech determined to coincid |
| 5739943 |
Polarization control unit |
April 14, 1998 |
| Light beams emitted from an optical fiber are converted into parallel light beams by a lens, and then allowed to pass through a Faraday device, followed by being converged to an incident end of the optical fiber by a lens. The Faraday device is applied with a magnetic field in a directio |
| 5726767 |
Automatic facsimile signal analyzing apparatus for a telephone exchange system |
March 10, 1998 |
| An automatic facsimile signal analyzing system includes a switch unit, a service trunk, a signal identification trunk, a facsimile communication determination unit, and a control unit. The signal identification trunk restores a facsimile control signal from a modulated and encoded facsim |
| 5710660 |
Gain-controllable optical amplifier and optical gain-control method |
January 20, 1998 |
| This invention provides an optical amplifier which has low noise characteristics for a wide range of input signal electric power. The optical amplifier has a plurality of cascaded optical amplifying units, a signal level detector, and a pump-source controller. The pump-source control |
| 5655088 |
Electronic market transaction system for detecting orders reaching a prescribed frequency of fai |
August 5, 1997 |
| The present invention proves an electronic dealing system, which electronically performs matching processing between information on transaction orders placed by order side customers and information on transaction orders placed by hit side customers so as to establish transactions the |
| 5655075 |
Protocol method for validating an input protocol specification |
August 5, 1997 |
| Validation of an input protocol is divided into two steps. In the first processing step, a state. transition graph of each process including only executable state transitions of each process is generated according to transition information which the protocol specification has, and at the |
| 5646984 |
Payer-variable exchange system |
July 8, 1997 |
| In a payer-variable exchange system, exchanges 2A and 2B and payer change control devices are provided corresponding to telephones 1A and 1B used by communicators A and B, payer change function units 4A and 4B of the payer change control devices 3A and 3B transmit and receive signals wit |
| 5638066 |
Efficient packed encoding method for ASN.1 |
June 10, 1997 |
| An efficient packed encoding rules (EPER) for ASN.1 for efficiently encoding the value to each type of abstract syntax definition, in which structure of an encoding data is divided into three fields of a bit field, an octet field following the bit field, and an offset field selectively |
