Abstract: 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 generating groups of events suited for the VAR model analysis based upon the association rules generated in the first generation unit, an analysis unit for analyzing groups of events generated in the second generation unit, the analysis of the event groups being executed by using the VAR model analysis, and a verifying unit for verifying reliability of the association rules generated in the first generation unit, the verification being executed by using the VAR model.

Abstract: 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 least one mobile user (mobile station and another mobile terminal such as IC device) to be traced is visited.

Abstract: 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 optical transmitting/receiving module for communicating signals with a part-time terminal. This module is selectable by a changeover switch in the protection-system low-speed interface unit. The connected configuration in the service system and the protection system is changed to allow the main terminal to make communications using either the service system or the protection system. If the main terminal makes normal communications using the service system, the part-time terminal will be allowed to make communications using the protection system by selecting the optical transmitting/receiving module for the part-time terminal with the changeover switch in the protection-system low-speed interface unit.

Abstract: 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 price is determined by charging unit price determination means by referring to contents of a table memory storing a table of charging unit price using the calling location and the receiving location as parameters, and the information of charging unit price is informed to a communication terminal through a charging unit price determination/information apparatus, whereby a communication fee according to the receiving destination can be informed to the caller, or the receiver.

Abstract: 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 information data sequences by the PN code sequence to provide spread spectrum signals, modulates the spread spectrum signals by respective carriers having different frequencies from each other to provide modulated signals, and then transmits the modulated signals via the communication channels respectively. A frequency interval of the carrier frequencies is determined to an even-numbered multiple of a symbol rate of the transmitted digital information data sequences.

Abstract: 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.

Abstract: 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 previous frame by using the produced motion vector to generate a motion compensated macroblock, a step of calculating a prediction error from the motion compensated macroblock and the macroblock to be coded in the current frame, a step of deciding whether the macroblock to be coded in the current frame is a significant macroblock or a non-significant macroblock by comparing the calculated prediction error with a threshold value, a step of coding the macroblock to be coded in the current frame when the macroblock is decided as the significant macroblock, and a step of transmitting only the produced motion vector when the macroblock is decided as the non-significant macroblock.

Abstract: 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, the number of appearance of an event set pair <X,Y> of a first event set X(={e.sub.x1,e.sub.x2, . . . ,e.sub.xn, . . . }, e.sub.xn indicates an event and n is a natural number) and a second event set Y(={e.sub.y1,e.sub.y2, . . . ,e.sub.yn, . . . }, e.sub.yn indicates an event), the number of appearance of the first event set X and the number of appearance of the second event set Y. The event set pair <X,Y> has co-occurrence so that the second event set Y occurs within a predetermined time period (window size W) after a time of occurrence of the first event set X.

Abstract: 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 strategy and/or a value of at least one parameter of the error control strategy which are/is optimum for transmission path conditions at that time, based upon the obtained statistical information, and a step of using the determined error control strategy and/or the at least one parameter for the error control during data communication.

Abstract: 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 using the public key and an identity itself. An identity confidentiality method includes steps of generating a time-varying public key at the base station based upon a predetermined time initial, and repeatedly broadcasting, from the base station, the generated time-varying public key to all the mobile stations. The mobile stations cipher their respective identities with the broadcasted time-varying public key so that the encrypted/identities of the mobile stations, which are sent to the base station, remain confidential. After enciphering their identity, the mobile stations wait to be called.

Abstract: 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 equal to or shorter than s, and a suffix processing unit for modifying a bit pattern of the produced codeword from the prefix processing unit so that the suffix of the codeword has continuous "0" bits with a bit length equal to or shorter than t, that a bit length of continuous "0" bits in the codeword is shorter than N, and that s+t<N is satisfied.

Abstract: 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.

Abstract: 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 of acoustic models, outputs a one sentence recognition result corresponding to acoustic models having the highest reliability when the one sentence is detected and stops the following calculations.

Abstract: 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 the difference derived by subtracting an output unit signal from corresponding binary teacher signal and then generates the difference as an error signal after a maximum absolute value of differences among erroneous binary output signals has become smaller than a threshold once. A training signal memory stores a set of training signals and adds test signals providing erroneous binary output signals that are transferred from a test signal memory in the test process to the set of training input signals as incremental training input signals.

Abstract: 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 with reference to the estimated DOA, a step of multiplying the antenna output signals by the calculated weights, respectively, and a step of summing the multiplied antenna output signals. The estimating step includes a first step of calculating a phase difference between the output signals of the two antenna elements during burst, a second step of calculating a phase difference between the output signals of the two antenna elements during an interval of bursts, and a third step of calculating a difference between the calculated phase differences.

Abstract: 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 part for measuring coding status during coding processes to provide at least one measured coding status, and a limiting part for adaptively limiting search range of the proposed coding modes and/or parameters in accordance with the at least one measured coding status.

Abstract: 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 control unit for controlling a read operation of a cell from the delay fluctuation absorption buffer. Since the delay fluctuation of a received cell is absorbed by the delay fluctuation absorption buffer, the number of memories necessary for interleaving can by reduced to two memories.

Abstract: 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 customers. Plural customers can be assembled as a subject, or home, group for whom a common credit line is set relative to other customers or customer groups; further, an individual customer or individual group of customers can assemble other, plural customers as an object, or opposing, group and for whom a common credit line is set.

Abstract: 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 pattern in each correlator is obtained by shifting by predetermined symbols cyclically from a reference unique word pattern. Each correlator provides a correlation value between a received TDM signal which includes a unique word and a unique word pattern defined in the correlator. Among outputs of N number of correlation values, which exceed a predetermined threshold value, the correlator which provides the maximum correlation value is selected, and the receive timing of the unique word is determined by the correlator thus selected.

Abstract: 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 the sub neural network is successively trained with the training input signal by using multi-value errors between a multi-value output signal of the main neural network 16 derived through a multi-value threshold means 17 and the main multi-value teacher signal, so as to compensate the multi-value errors involved in the multi-value output signal of the main neural network 16 by the multi-value output signal of the sub neural network 18 derived through a multi-value threshold means 19. A desired multi-value output signal of the parallel multi-value neural network 15 is obtained by adding in modulo the multi-value output signals of both the neural networks through a multi-value modulo adder 20.