Abstract: An information processing system including an information processing unit that performs communication processing among a plurality of user terminals connected via an IP (Internet Protocol) network. The information processing unit includes control elements for acquiring an operating state of the information processing unit, as well as, instructs another information processing unit to perform the communication processing among the plurality of user terminals, according to the acquired operating state.

Abstract: In a communication system, a plurality of segments are formed. The plurality of segments each include: a communication path instruction device instructing establishment of a communication path in a network; the network in which a communication path is established by the communication path instruction device; and an information acquisition unit acquiring network information of the network. The networks of the respective segments are connected to each other via a network connection device. The communication system has: an information aggregation unit aggregating a plurality of network information acquired by the information acquisition units; and a higher-level communication path instruction unit instructing establishment of a path in each of the networks of the respective segments. The higher-level communication path instruction unit instructs establishment of a communication path passing through the networks by using the information aggregated by the information aggregation units.

Abstract: In a state that: a plurality of segments are formed; the segments each include a communication path instruction device instructing establishment of a communication path in a network, the network in which a communication path is established by the communication path instruction device, and an information acquisition unit acquiring network information of the network; and networks of the respective segments are connected to each other via a network connection device, a communication path passing through a plurality of networks is established and a fee depending on the established communication path passing through the networks is determined.

Abstract: A communication system includes: a communication path instruction device which executes a communication path instruction process of giving an instruction to build a communication path in a given network to a network device installed in the network; the network device which builds the communication path in the network and processes given transmitted and received data, in response to the instruction by the communication path instruction device; and a control unit instructing another communication path instruction device different from the communication path instruction device to execute at least part of the communication path instruction process, at given timing.

Abstract: A communication system in the present invention has a plurality of information processing devices each executing communication control processing on user terminals connected via a network, and the communication system includes: an outside situation information acquiring unit which acquires outside situation information representing a preset outside situation of a place where the information processing device is installed; and a communication control unit which instructs so that the communication control processing executed on the user terminals by a predetermined one of the information processing devices is executed by another one of the information processing devices, on the basis of the outside situation information acquired by the outside situation information acquiring unit.

Abstract: An information processing system including an information processing unit that performs communication processing among a plurality of user terminals connected via an IP (Internet Protocol) network. The information processing unit includes control elements for acquiring an operating state of the information processing unit, as well as, instructs another information processing unit to perform the communication processing among the plurality of user terminals, according to the acquired operating state.

Abstract: An optical disc apparatus includes a plurality of phase-locked loops for outputting a signal corresponding to a synchronous clock that is generated based on a wobble formed in an optical disc, a selector for selecting and outputting one of outputs from the plurality of phase-locked loops, and a synchronous clock generator for generating the synchronous clock according to an output from the selector.

Abstract: An optical disk apparatus which has first and second light-emitting elements for emitting laser beams, and records data on a recording medium with laser beams from the first and second light-emitting elements includes first and second recording abnormality detectors, first and second protective circuits, and abnormality signal synchronization circuits. The first and second recording abnormality detectors detect abnormalities of recording by the first and second light-emitting elements from beams reflected by the recording medium during execution of recording. The first and second protective circuits immediately stop recording being executed by the first and second light-emitting elements, and protect data on the recording medium when the first and second recording abnormality detectors detect abnormalities.

Abstract: An optical disk apparatus for performing recording and reproduction of information on an optical disk is disclosed. The optical disk has a sector format which consists of a sector mark area in which a sector mark is recorded and an address area in which a plurality of VFO segments and ID segments are alternately provided. The apparatus comprises a sector mark detector, a read gate controller, a PLL controller and an address information detector. The sector mark detector detects the sector mark. The read gate controller controls a read gate to be opened and closed. The read gate enables readout of information from the VFO segment when it is opened. The PLL controller initiates synchronization of a signal read from the VFO segment with a PLL in response to the opening of the read gate. The address information detector detects an address identifier recorded in the ID segment.

Abstract: An optical disk apparatus having an optical head for reading and writing signals on an optical disk and a signal processing unit for performing predetermined signal processing on the signals is disclosed. The apparatus includes a first controller, a second controller, a detector, and an adjuster. The first controller controls the optical head to write a predetermined signal on a predetermined area of the optical disk with various levels of recording power of the optical head. The second controller reproduces the predetermined signal written on the predetermined area of the optical disk. The detector attempts to detect a predetermined signal pattern having a predetermined period from the reproduced signal with different slice levels. The adjuster determines a resolution of the reproduced signal in accordance with a slice level with which the signal pattern can be detected and automatically adjusts the recording power of the optical head based on the determined resolution.

Abstract: A method of bidirectional data transmission with a single transmission line using a time-compression multiplexing method, which is configured to allow a downstream channel capacity to be higher than an upstream channel capacity. In a bidirectional communication system, a master unit and a slave unit exchange data alternately in the time-compression mode. The method, according to the present invention, sets a downstream data transmission time, tm, for data transmission from the master unit to the slave unit is set longer than an upstream data transmission time, ts, for the opposite direction. As a result, the downstream data rate (or the amount of data transferred in the downstream direction per unit time) becomes larger than the upstream data rate.

Abstract: A grinding wheel for treating a surface of a power transmission belt/belt sleeve. The grinding wheel has a cylindrical body defining a rotational axis and having a circumferential outer surface with there being a plurality of abrading elements arranged in circumferentially spaced relationship on the outer surface of the body. Reliefs are provided between adjacent abrading elements. The invention further contemplates a method of treating a belt using the inventive grinding wheel.

Abstract: A cross-point type switch includes a plurality of basic elements arranged in rows and columns so as to form a matrix arrangement of the basic elements. Each of the basic elements includes a plurality of input ports, output ports, expanded input ports and expanded output ports. A write/read part is connected to a common memory and has the function of writing data into the common memory and reading out the data from the common memory. A selector part selectively outputs either the data read out from the common memory or data from the expanded input ports to the output ports. The expanded output ports are directly connected to the input ports.

Abstract: An initial gain of an automatic equalizer is fixed to a predetermined value. Then, the most appropriate gain of the automatic equalizer is determined when a training signal is received by the automatic equalizer. An echo replica signal produced by an echo canceler is multiplied by the value obtained by dividing the most appropriate gain by the initial gain. Thus, the echo replica signal is corrected to cancel the echo signal included in the output of the automatic equalizer. The sampling rate of the A/D converter used in the transmitter and receiver is shifted by a predetermined value from the transmission line rate at an initial training stage. Thereafter, the sampling rate of the A/D converter is determined to be near that of the transmission line.

Abstract: An apparatus for limiting deviation of an endless belt/belt sleeve from a desired rotational path. The apparatus has first and second rollers each having a rotational axis and cooperatively supporting an endless belt/belt sleeve trained therearound for rotational movement in a predetermined path. A first member is mounted on one of the first and second rollers for movement axially relative to the one of the first and second rollers. A blocking structure defines a shoulder for engagement with an edge of an endless belt/belt sleeve trained around the first and second rollers to limit movement of an endless belt trained around the first and second rollers in a first axial direction relative to the one of the first and second rollers.

Abstract: A circuit for obtaining accurate timing information from a received signal, first, obtains an impulse response at a certain phase, which phase is determined based on a reference phase of a receiver clock, and then the obtained impulse response is compared with a reference level. As the reference level: a predetermined value just below the maximum value of the overall impulse response; an impulse response at another phase; or an impulse response at the same phase in a previous period, is used. The reference phase is controlled, according to the result of the comparison.

Abstract: Disclosed is a digital adaptive filter and a method of cancelling an echo component generated by a partial return of a transmission signal to a receiving side. The digital adaptive filter comprises: a main memory unit for storing a first echo replica which can be stored or read by using the parallel signal from a main tap unit as an address signal, at least one submemory unit for storing a second echo replica which can be stored or read by using the parallel signal from said subtap unit as an address signal, and an adding circuit for adding the first echo replica and the second echo replica. The second echo replica stored in the at least one submemory unit has a greater precision than the precision of the first echo replica stored in the main memory unit, and thus the accumulated error due to memory division can be reduced.

Abstract: The present invention is directed to an apparatus for automatically delivering power transmission belt preforms from a supply to a work station for entrainment on a pair of cooperating pulleys, in which position a cutting, abrading operation, or the like can be performed on the belt. Once the belt is completed, structure automatically removes the belt from the pulleys and delivers the same to a desired destination.

Abstract: A power transmitting belt manufacture wherein belts are molded to have various cross sections. The belts are machined to a desired cross section. Each belt is entrained about drive and driven pulleys to run the belt under a preselected tension. At least one roller is caused to engage the back surface of the driven belt to reinforce the otherwise unsupported belt at the point of cutting between drive and driven pulleys. A pair of opposed cutting blades are engaged with the opposite sides of the belt to form the opposite side edges of the final belt section.

Abstract: A power transmitting belt manufacture wherein belts are molded to have various cross sections. The belts are machined to a desired cross section. Each belt is entrained about drive and driven pulleys to run the belt under a preselected tension. At least one roller is caused to engage the back surface of the driven belt to reinforce the otherwise unsupported belt at the point of cutting between drive and driven pulleys. A pair of opposed cutting blades are engaged with the opposite sides of the belt to form the opposite side edges of the final belt section.