Abstract: A system 100 is capable of segmenting a connected text, such as Japanese or Chinese sentence, into words. The system includes means 110 for reading an input string representing the connected text. Segmentation means 120 identifies at least one word sequence in the connected text by building a tree structure representing word sequence(s) in the input string in an iterative manner. Initially the input string is taken as a working string. Each word of a dictionary 122 is compared with the beginning of the working string. A match is represented by a node in the tree, and the process is continued with the remaining part of the input string. The system further includes means 130 for outputting at least one of the identified word sequences. A language model may be used to select between candidate sequences. Preferably the system is used in a speech recognition system to update the lexicon based on representative texts.

Abstract: The invention relates to a resource allocation method and system making use of a dynamically controlled boundary policy to satisfy the quality of service parameters guaranteed by the system for two traffic classes (a constant bit rate traffic, and a bursty data one also called VBR traffic) having to share a communication channel divided into frames. The boundary position (BP) between the traffic sub-frames and hence the allocation decision itself are defined by a resource allocator (23) for each frame, after monitoring the filling level of traffic request queues (21, 22).

Abstract: An encrypting exponentiation modulo M is effected by a modular multiplication X*YmodM, where M is a temporally steady but instance-wise non-uniform modulus. The method involves an iterative series of steps. Each step executes one or two first multiplications to produce a first result, and a trim-down reduction of the size of the first result by one or more second multiplications to produce a second result. The method furthermore takes a distinctive measure for keeping the final result of each step below a predetermined multiplicity of the modulus. In particular, the method postpones substantially any subtraction of the modulus as pertaining to the measure to a terminal phase of the modular exponentiation. This is possible through choosing in an appropriate manner one or more parameters figuring in the method. This further maintains overall temporal performance.

Abstract: A distributed pattern recognition system includes at least one user station and a server station. The server station and the user station are connected via a network, such as Internet. The server station includes different recognition models of a same type. As part of a recognition enrolment, the user station transfers model improvement data associated with a user of the user station to the server station. The server station selects a recognition model from the different recognition models of a same type in dependence on the model improvement data. For each recognition session, the user station transfers an input pattern representative of time sequential input generated by the user to the server station. The server station retrieves a recognition model selected for the user and provides the retrieved recognition model to a recognition unit for recognising the input pattern using the recognition models.

Abstract: The integrated circuit (1) suppresses leakage currents, which usually take place between neighboring transistors (10, 20) through the unpatterned semiconductor layer (5). In its first layer (3), the circuit (10) comprises electrically conductive tracks (4) which are in contact with the semiconductor layer (5), some of which tracks (4) are in use as source and drain electrodes (14, 15, 24, 25) and are preferably fork-shaped and interdigitated. The suppression of leakage currents is achieved by putting neighboring electrodes (14, 24) in different transistors (10, 20) at the same voltage and by excluding the presence of any other electrically conductive tracks between those neighboring electrodes (14, 24). Interconnect lines (39) carrying input or output signals are positioned in a second layer (7) as much as possible, which second layer (7) comprises electrically conductive tracks (8) and is not in contact with the semiconductor layer (5).

Abstract: The invention relates to a device for the verification of time-dependent, user-specific signals which includes means for generating a set of feature vectors which serve to provide an approximative description of an input signal and are associated with selectable sampling intervals of the signal; means for preparing an HMM model for the signal; means for determining a first probability value which describes the probability of occurrence of the set of feature vectors, given the HMM model, and a threshold decider for comparing the first probability value with a threshold value and for deciding on the verification of the signal.

Abstract: A method for synchronizing timestamps in a network (e.g., a wireless ATM network) that includes a control node and a plurality of other nodes that communicate with one another over a common channel mediated by a medium-access control subsystem (e.g., one that uses a reservation-based TDMA protocol). The method includes the steps of sending a first command from the control node, at a first time, then storing a starting timestamp value in a register within the control node and each of the other nodes, in response to the first command, and then sending a second command from the control node, at a second time later than the first time. Each of the other nodes computes the difference between the starting timestamp value and a current timestamp value, and then adds the computed difference to the current timestamp value.

Abstract: A method of transmitting information in a communications system. The method preferably includes the steps of establishing a communications link between a base station and a temporary node, attempting to maintain a second communication link between the base station and a wireless terminal and upon a determination that the second link cannot be established or satisfactorily maintained, transmitting information from the first base station to the temporary node so that the temporary node can retransmit the information to the wireless terminal, attempting to reestablish the second link and upon such establishment, discontinuing the transmission of subsequent information from the base station to the temporary node and directly transmitting the subsequent information to the wireless terminal from the base station. A system to carry out the foregoing steps is also provided.

Abstract: The invention relates to a microcontroller circuit, comprising circuit elements arranged on a semiconductor body. In order to make a tentative forgery of such a microcontroller circuit at least more difficult, at least a number of the co-operating circuit elements is provided on the semiconductor body in an irregularly scrambled spatial configuration.

Abstract: In a multistation intercommunication system human speech is processed on at least two respective levels of generic complexity. The speech is received in one or more origin stations in parallel and a necessity is detected to understand the speech in an associated application environment. Intercommunication is controlled in a distributed manner, by detecting temporal speech items to be recognized and dynamically assigning speech items amongst one or more of a plurality of distributed speech recognizing facilities to eventually generate recognized items. Further intercommunication is controlled to understand recognized items in a further context of the application in question through assigning the recognized items amongst one or more of a plurality of speech understanding facilities to generate speech items that have been understood. Assigning is effected in a distributed manner as based on a combination of contingency and statistics.

Abstract: The present invention relates to a data processing device (100), notably a chip card, which includes an integrated circuit (10) and a power supply. The power supply includes a voltage converter (12) which converts an output current Iaus (46), powering the integrated circuit (10), into a pulsed input current Iein (44), where Vaus≦Vein.

Abstract: The invention relates to a device for the verification of time-dependent, user-specific signals which includes means for generating a set of feature vectors which serve to provide an approximative description of an input signal and are associated with selectable sampling intervals of the signal; means for preparing an HMM model for the signal; means for determining a probability value which describes the probability of occurrence of the set of feature vectors, given the HMM model, and a threshold decider for comparing the probability value with a threshold value and for deciding on the verification of the signal. For better adaptation of the verification to the relevant user and the user-specific signals assigned thereto, it is proposed to provide means for the automatic person-specific evaluation of the relevance of the features collected in the feature vectors by way of an LDA transformation and for the automatic selection of features evaluated as relevant.

Abstract: The invention relates to a method of estimating probabilities of occurrence of speech vocabulary elements in a speech recognition system. By modification of the linguistic speech modeling, further alternatives for reducing the error rate and perplexity of a speech recognition system are proposed.

Abstract: The bias current of the semiconductor laser 4 is adjusted corresponding to the amplitude of the modulation. A transmit signal is presented to the input 1, then amplified by an amplifier 2 and transmitted to the laser 4 via a blocking capacitor 3. A check photodiode 5 is optically coupled to the laser and a set of four resistors 6, 7, 8, 9 forms a bridge. A differential amplifier 10 having its inputs connected to the bridge ensures the supply of bias current through an inductance 11 intended to inhibit the passing of the modulation signal. A peak detector 12 measures the peak amplitude of the signal that drives the laser to check the conductance of a transistor 14 which operates in the variable conductance mode and is branched parallel to the branch 7 of the resistor bridge to modify the balance of the bridge and thus the value of the power transmitted by the laser.

Abstract: In a data carrier (1) having a transmission coil (2) and having an integrated circuit (3) connected to the transmission coil (2) the integrated circuit includes rectifier means (9), energy storage means (10), data processing means (13) and load modulation means (14), and additional means (18) are connected to the load modulation means (14) and to the energy storage means (10), the additional means (18), when the load modulation means (14) are in their active condition, enabling a part of the energy stored in the transmission coil (2) to be applied to the energy storage means (10), which are connected to the additional means (18), the energy storage means (10) connected to the additional means (18) being utilized for powering the data processing means (13).

Abstract: A system and apparatus for using speech recognition and verification to provide secure and authorized data transmissions between networked computer systems is provided. The system includes first and second network computer systems wherein a request for a transaction by user of the first computer system causes the user to be prompted to enter a spoken identifier such as a credit card number, PIN number or password. This spoken identifier is converted from speech data into speech feature data using either a resident software application or a downloaded application from the second computer system. The speech feature data is transmitted to the second computer system wherein speech recognition and verification engines identify the spoken identifier and determine whether or not the user who spoke the identifier is properly associated with the spoken identifier. Upon successful completion of this recognition and verification process, the requested transaction is completed.

Abstract: The system transmits data between terminals of a wireless network. In the system, a base station/central controller (“BS/CC”) controls transmission of data from a transmitting terminal to plural receiving terminals, where the data is ordered in slots of a control data frame (“CDF”), and where each slot is reserved for a data transmission between the transmitting terminal and a specific receiving terminal. Specifically, the BS/CC divides the plural receiving terminals into a set of power-saving terminals and a set of non-power-saving terminals, and then reserves a set of slots in the CDF for data transmission between the transmitting terminal and the power-saving terminals, and another set of slots in the CDF for data transmission between the transmitting terminal and the non-power-saving terminals.

Abstract: A method and apparatus for controlling and stabilizing laser wavelengths in a dense wavelength division multiplexer (DWDM) transmission system. The lasers in the transmission system are each modulated in a known manner by a data signal. In addition, the lasers are each modulated by a plurality of test signals each having a predetermined frequency. At the optical receiver, a frequency analyzer examiners the frequency test signals for distortions and/or changes in amplitude. Any distortions and/or changes in amplitude of the frequency test signals indicate a change in the wavelength of a corresponding laser. A control signal may be returned to the laser controller of each laser to regulate the laser wavelength. A fault signal may be generated indicating that the wavelength of a laser has changed, drifted, etc., more an acceptable amount.

Abstract: The present invention relates to a modulator comprising an oscillator which has an oscillation frequency, and a mixer intended to supply a modulated signal with a given output frequency. According to the invention, the nominal oscillation frequency is N times higher than the output frequency, the modulator further including a frequency divider DIV/N intended to receive the output signal of the oscillator and to apply the carrier signal to the mixer, to produce a modulated signal with a first modulation frequency and a parasitic signal with a second modulation frequency.

Abstract: In a product including a speech recognition device for controlling at least one processing unit while using a command lexicon containing commands which depends as regards its contents on an activated operating state of a processing unit and which speech recognition device includes a command lexicon memory in which commands of the command lexicon can be stored in the form of command information and identification information assigned to the latter, and which speech recognition device includes speech recognition means for detecting command information—contained in speech information representing a spoken command—and delivers command information to the at least one processing unit, generating means are provided which are arranged for generating—after an operating state of a processing unit has been activated—which may be effected with the aid of command information detected in a spoken command—a command lexicon assigned to only this one activated operating state and for storing this