493results about How to "Accurate synchronization" patented technology

In a transmitting method for transmitting a transmit signal sequence by a number of subcarriers, a plurality of subcarriers F1, F2, . . . FNSCH exclusively for a synchronization channel are provided, a signal sequence of synchronization channel SCH is transmitted by the plurality of exclusive subcarriers, and a common pilot CPICH or dedicated signal DPCH is transmitted on the other subcarriers. In this case, the signal sequence of the synchronization channel is subjected to differential encoding processing and the differentially encoded signal sequence is transmitted by the exclusive subcarriers.

A gaming machine for conducting a wagering game includes a sound system for presenting audio directly related to the game or indirectly related as background sound or music. The audio files contain markers that initiate other events and are instrumental in synchronizing the audio to the events.

A multimedia playing apparatus plays hypermedia titles each consisting of a plurality of monomedia objects including at least one finite time monomedia object such as a video object, which is formatted as a sequence of fixed-length playing sections such as video frames and functions as a base-axis object for providing a timing reference. The apparatus executes playing of a hypermedia title in accordance with processing time points specified as respective numbers of the playing sections, and stores and utilizes a plurality of sets of synchronization trigger data each of which designates that playing of a specific monomedia object other than the base-axis object is to be started, or is to be ended, at a specific processing time point, with the synchronization trigger data sets being successively accessed and used as the corresponding processing time points are respectively reached during playing of the hypermedia title.

A method and apparatus for conveying data over a packet-switching network (26). Data are received from a peripheral device (25) for transmission via the network to a memory (22) associated with a central processing unit (CPU) (21), followed by an interrupt signal from the peripheral device associated with the data. One or more data packets containing the data are sent over the network to a host network interface (32) serving the memory and the CPU, followed by an interrupt packet sent over the network to the host network interface. Responsive to the interrupt packet, an interrupt input of the CPU is asserted only after the one or more data packets have arrived at the host network interface.

A multiple-antenna system including a base station apparatus and a plurality of antenna apparatuses connected to the base station via optical cables is provided. The system comprises a first antenna apparatus and a second antenna apparatus connected to each other via an electric cable. Each of the first and second antenna apparatuses receives a reference pulse from the base station apparatus via the optical cables, and estimates a time difference between the received pulse and the reference pulse supplied from the counterpart antenna apparatus via the electric cable. At least one of the first and second antenna apparatuses adjusts signal transmission timing based on the time differences estimated by the first and second antenna apparatuses.

A system and method monitor a hydrocarbon reservoir for drainage in volumetric three dimensions. Monitoring between wells is imperative for optimum reservoir management and is achieved by mapping the hydrocarbon fluid pathways in a producing reservoir. Unlike conventional 4D or time-lapse reflection seismic imaging systems that use a controlled active seismic source and records reflected seismic energy at receivers, the system and method exploit the minute vibrations, or micro-earthquakes generated in the reservoir layers that are induced by fluid movement. These microseisms are detected as the fluids move in the reservoir.

The present invention is an improved compact media web electrophotographic printer including photographic full-color, and an automatic web feeding and cutting registration apparatus and method for media web and closely spaced short printouts. This apparatus comprises an improved media web-handling unit for feeding from a recording roll, and an improved sensing system for sensing a buckle and for precisely cutting the short printout at a desired controlled length, and includes an automatic setup prior to each print cycle. In addition a color serial printer having equiangularly arranged process cartridge units movable along guide rails and which is parallel to a common transfer roll which is also seperately movable along guide rails is disclosed.< / PTEXT>

A modem, or a communication system, in its transmission section, has signal-formatting circuitry followed by circuitry for insertion of a sequence of pilot symbols into a sequence of data symbols outputted by the formatting circuitry. Placement of the insertion circuitry after the formatting circuitry permits a variety of formatting options without effecting the sequence of pilot symbols that serves as a time reference useful in detection of a signal transmitted by the modem. The reception section of the modem is equipped correspondingly to process a received composite signal of data symbols having a prescribed format and a sequence of pilot symbols. The reception section extracts the sequence of pilot symbols from the composite signal, and employs the pilot symbols to develop a time base for operation of circuitry for decoding the format of the received composite signal to extract data from the composite signal.

A frequency and symbol timing synchronization apparatus for orthogonal frequency division multiplexed (OFDM) signals, and a method performed by the apparatus are provided. This apparatus includes an autocorrelation unit, a comparator, a peak flat detector, a frequency offset estimator, a frequency offset compensation unit, a cross correlation unit and a symbol timing synchronization unit. The autocorrelation unit receives data including a synchronizing symbol made up of at least three identical synchronizing signals, delays the received data by a predetermined delay amount, performs autocorrelation between the received data and the delayed data, normalizes an autocorrelated value, and outputs a normalized autocorrelated value. The comparator compares the normalized autocorrelated value with a predetermined threshold value. The peak flat detector detects as a flat section a section where the normalized autocorrelated value is equal to or greater than the threshold value. The frequency offset estimator estimates a frequency offset within the flat section to obtain a frequency offset value. The frequency offset compensation unit compensates for the frequency offset of a received signal using the frequency offset value. The cross correlation unit performs cross correlation using a frequency offset-compensated signal and a reference signal, and normalizes the cross-correlated value to output a normalized cross-correlated value. The symbol timing synchronization unit detects a point where the cross-correlated value is maximum, and performs symbol timing estimation, thereby performing symbol timing synchronization. In the symbol timing and frequency synchronization apparatus and method, accurate frequency synchronization can be achieved because a large sample error can be allowed. Also, a symbol timing error can be reduced since symbol timing synchronization is achieved using a frequency offset-compensated signal.

Digital audio and video files are created corresponding to selected scenes from a creative production and are provided with a processing system that enables dialog to be selected from a scene and replaced by a user's dialog which is automatically synchronized with the original dialog so as to be in synchronism with lip movements displayed by the accompanying video display. The processing further includes a graphical user interface that presents the user with the video, the text of the dialog, and cues for rehearsal and recording of replacement dialog by the user. Replay of the user's dialog is accompanied by the video and part of the original audio except that the original dialog corresponding to the user's dialog is muted so that the user's dialog is heard as a replacement. Singing or other sounds associated with visible action may also be replaced by the same processes.

The invention discloses a high-precision synchronous multi-channel image acquisition system and a method thereof. The system comprises a time source, a plurality of video acquisition units and a plurality of cameras. The method comprises six steps. According to the high-precision synchronous multi-channel image acquisition system and the method, synchronous time signal synchronization camera shooting is adopted for trigger signals, strict synchronization of shooting moments (exposure moments) of multi-channel cameras is achieved, the shooting moments are strictly synchronous with time of a time source, and the requirement for high-precision multi-channel synchronous image acquisition is met; timestamp information of trigger pulses is recorded, so that timestamps marked by images are the shooting moments, the timestamp marking precision is improved, follow-up information extraction and measurement analysis of multi-channel images are facilitated, and the good economic and social benefits are obtained.

A real-time simultaneous measurement apparatus includes: a hemoglobin information-receiving portion that sequentially receives hemoglobin information, which is information relating to the amount of hemoglobin in a head portion of a test subject, from a NIRS brain-measuring apparatus that receives a synchronization signal output by a synchronization signal output apparatus and acquires the hemoglobin information when the synchronization signal has been received; a brain wave information-receiving portion that sequentially receives the brain wave information of the test subject, from an EEG brain wave-measuring apparatus that receives a synchronization signal output by the synchronization signal output apparatus and acquires the brain wave information when the synchronization signal has been received; a synchronization processing portion that performs processing that synchronizes the hemoglobin information and the brain wave information; and an output portion that outputs the synchronized hemoglobin information and brain wave information.

An interface circuit includes: a first synchronizing circuit for synchronizing a signal having a delay equal to or more than a predetermined period with respect to a reference clock, with the reference clock; a second synchronizing circuit for synchronizing a signal having a delay less than the predetermined period with respect to the reference clock, with the reference clock; a delay determining circuit for outputting a determination signal based on a delay of the signal relative to the reference clock; a delay determination setting circuit for outputting a path setting signal that designates an output value of one of the first synchronizing circuit and the second synchronizing circuit based on a preset value; and a delay selecting circuit for selecting and outputting an output value of one of the first synchronizing circuit and the second synchronizing circuit based on one of the determination signal and the path setting signal.

Methods and systems for performing three dimensional LIDAR measurements with an integrated LIDAR measurement device are described herein. In one aspect, a return signal receiver generates a pulse trigger signal that triggers the generation of a pulse of illumination light and data acquisition of a return signal, and also triggers the time of flight calculation by time to digital conversion. In addition, the return signal receiver also estimates the width and peak amplitude of each return pulse, and samples each return pulse waveform individually over a sampling window that includes the peak amplitude of each return pulse waveform. In a further aspect, the time of flight associated with each return pulse is estimated based on a coarse timing estimate and a fine timing estimate. In another aspect, the time of flight is measured from the measured pulse due to internal optical crosstalk and a valid return pulse.

A contact reminder apparatus, system and method are provided. The illustrative embodiments provide a mechanism for providing contact reminder messages to a user based on communications with contacts from a variety of different communication devices. The illustrative embodiments synchronize communication logs and contacts from communication devices that may be of the same or different types and use the synchronized communication logs to determine whether to reset contact reminder counters that are used to determine whether to send a contact reminder message to a user. A user may designate preferred types of communication for each contact and may have the contact reminder counters automatically adjusted based on such preferences and whether or not a preferred type of communication was last used to communicate with a contact. Moreover, contact reminders may be sent to communication devices determined to provide the communication type corresponding to the communication type specified in the contact reminder.

The present invention generates 3D moving images representing various aspects of a musical performance that can be synchronized, as necessary, to the changing tempo of a live or recorded performance, either automatically, or with live-controlled user input, and either with or without a score.

The invention provides a multi-node synchronous sampling control and data transmission method, the steps are as follows:(1) an overall synchronizer that matches with the upper layer data processing equipment and the process variable acquisition control equipment (DAE) is constructed, the equipment produces an overall synchronous signal S1 by utilizing an outer sync source or a local timer; (2) the overall synchronous signal is accessed to one or more data communication equipment (DCE), which produce a synchronous signal S2 for each accessed process variable acquisition control equipment; (3) the absolute time scale in the signal S1 and the overall sampling counter are utilized to realize the secondary synchronous sampling on the process variable among the data communication equipment; (4) the acquisition control equipment (DAE) for acquiring and outputting the process variable detects the synchronous signal and order data after receiving the signal S2; (5) the acquisition control equipment dynamically adjusts the start time of the S2 signal according to Delta ti and realizes the long-distance multinode synchronous sampling.

A system, method and device are provided for obtaining, from each endpoint device, meter reading data where the meter reading data are recorded and managed based on a relative time clock in each endpoint device. The relative time clock may be a simple inexpensive clock that tracks minutes and triggers recording of meter reading data for a particular hour at the end of that hour. In that embodiment, a collection system sends an endpoint device a request that includes a requested time that is converted into a relative time so that the endpoint device can understand the request. Since each recorded interval is generated based on a relative time maintained by the clock in the endpoint device rather than an absolute (real) time, the endpoint device does not need to maintain accurate date / time or to read meter reading data from the utility meter based on a real date / time.

According to the invention, a time synchronization of phase between measurement devices that do not share a same clock for their respective sampling of the signals is carried out by a time tagging of samples of the signals in time blocks followed by an adjustment of the phase values of components of interest of the signals in the regrouped time blocks so that the values refer to common time references between the measurement devices. The tagging is carried out with a synchronization signal available to the measurement devices, completed with count values provided by a counter operated by a reference clock for each measurement device.

Pseudolite-based precise positioning system with synchronised pseudolites that can compute the position of a mobile station with slave pseudolites synchronised to master pseudolite is provided. Therefore pseudolite-based precise positioning system according to present invention does not need correction information of a reference station. A pseudolite-based precise positioning system for computing the position of a mobile station without correction information of a reference station, the pseudolite-based precise positioning system includes: master pseudolite with reference clock of the positioning system; at least one slave pseudolite having digitally controlled numerical controlled oscillator means; mobile station computing the position of itself based on the clock-synchronised signal from the master pseudolite and the slave pseudolite without correction information of a reference station; and clock synchronisation loop filter means having the digitally controlled numerical controlled oscillator means synchronise the clock of the slave pseudolite to the clock of the master pseudolite by transmitting synchronisation information U k? of the slave pseudolite to the digitally controlled numerical controlled oscillator means, clock synchronisation loop filter means generating the synchronisation information U k? based on the pseudorange information and carrier phase information received from the master pseudolite and the slave pseudolite.

A controller for a brushless motor that includes a processor, a first timer, a second timer, a compare register, a comparator, an input, and one or more outputs. The processor starts the first timer in response to a signal at the input. The first timer then generates an interrupt after a first period. In response to the interrupt, the processor generates a first control signal at the outputs. The processor also loads the compare register and starts the second timer in response to either the input signal or the interrupt. The comparator then generates a second control signal at the outputs when the second timer and the compare register correspond. Additionally, a motor system that includes the controller.

A touch sensing system comprises a touchscreen with a plurality of touch electrodes, to which a touchscreen driving signal is applied, and a stylus pen that generates a pen driving signal based on the touchscreen driving signal and sends the same to the touchscreen. The stylus pen comprises: an amplifier that amplifies the touchscreen driving signal to generate an amplified signal; a comparator that compares the amplified signal with a preset reference voltage to generate a comparator output signal; and a signal processor that measures the pulse width of the comparator output signal, adjusts an amount of delay based on a measurement, and determines an output timing of the pen driving signal based on an adjusted amount of delay to synchronize the pen driving signal with the touchscreen driving signal.

The invention concerns a method for synchronizing clocks of a set of nodes in a TDMA (“Time Division Multiple Access”) communication network comprising a plurality of nodes, among which some called time reference (TR) nodes are synchronized to a common time reference through a predetermined out-of-band synchronization mechanism, other nodes being called non-TR nodes, each node comprising an internal clock, characterized in that it comprises the steps of:transmitting, at the level of at least one of said TR nodes, a broadcast beacon packet during a given time slot of sub-frames, each sub-frame comprising a plurality of time slots;propagating among the remaining nodes said beacon packet using the slotted structure of the TDMA protocol, each node being pre-assigned a conflict-free time slot in a sub-frame to broadcast said beacon packet received from another node in a previous slot of said sub-frame; andupdating in at least two of said non-TR nodes the internal clock based on an updated offset estimate, upon reception of said beacon packet.The invention also concerns a communication device in a TDMA communication network.

The invention provides a chain type STATCOM (Static Synchronous Compensator) control system based on EtherCA technology, wherein the chain type STATCOM control system uses real-time industrial Ethernet EtherCA as a channel of data transferring, and the control system uses a layered distribution topology structure. The layered distribution topology structure of the STATCOM control system comprises a main control layer, a phase control layer and a unit control layer. The main control layer comprises a main control case and the like functional cases, the phase control layer is composed of a phase coupler case, and the unit control unit is composed of a unit controller. The communication between the main case and the phase coupler case is carried out by means of firewire connected EtherCA. The chain type STATCOM control system based on EtherCA technology provided by the invention has the advantages that the data transferring speed is high, the number of the cable is less, the exchange speed is fast, the expansion is convenient, the accurate synchronism and the diagnosis ability are strong and the configuration is flexible.

A method and apparatus for synchronizing digital and analog / mixed signal modules in a test site of an open architecture test system is disclosed. Event triggers from digital modules are routed to an ASYNC module, which selectively distributes them to analog / mixed signal modules. When an event occurs, the trigger may activate an analog / mixed signal module to perform a certain operation. The ASYNC module may also receive triggers from the analog / mixed signal modules and selectively distribute them back to the digital modules or analog / mixed signal modules. The digital modules can be programmed to wait for an analog / mixed signal module to complete an operation, as indicated by a trigger received from that analog / mixed signal module, before continuing. Because embodiments of the present invention enable synchronization of digital and analog / mixed signal modules under pattern control, synchronization can be very precise and repeatable as compared to synchronization from a site controller.

The invention discloses an audio and video subtitle generation method and apparatus. The method comprises the following steps: receiving voice data with subtitles to be generated and text data; according to the rhythm of speakers, segmenting the vice data to obtain each voice data segment according with habits of the speakers; according to the voice data segments, segmenting the text data to obtain text data segments corresponding to the voice data segments; and according to time information of each voice data segment, obtaining starting time and finishing time of the text data segments corresponding to the voice data segments. According to the invention, the text data can be displayed synchronously with the voice data in a simple and efficient mode, and the generated subtitles are more complete.