1201results about How to "Reduce search time" patented technology

A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. Power is then inhibited to the tuner of the receiver to minimize power consumption. The signal sample may be read from memory when necessary to process the signal without further signal acquisition. Power to other receiver sections may be selectively controlled to minimize power consumption. Such a receiver is useful in global positioning satellite (GPS) signal processing where the receiver has a limited power supply.

An information processing unit of the present invention includes a display control unit that causes an icon display area, in which a plurality of icons related to each other are grouped, to be displayed and an operation unit that receives various operations by a user. When the operation unit inputs a command for expanding or contracting the icon display area in a one-dimensional direction which is the same as an arrangement direction of the plurality of the icons in the icon display area, the display control unit causes the icon display area to be expanded or contracted in the one-dimensional direction. With such a configuration, the operability can be enhanced by shortening a time for searching for a desired icon.

An apparatus for content item signature matching comprises a database (103) which has signatures for a plurality of content items. A likelihood processor (105) determines a match likelihood indication for the content items where the match likelihood indication is indicative of a likelihood of a match between the content item and an unknown signature. An interface (111) receives a query signature associated with a content item and in response a search processor (113) searches the database (103) for a matching signature to the query signature. The search processor (113) is operable to search the database in response to the match likelihood indication of the plurality of content items. In particular the database (103) may be ordered in order of decreasing probability of a match and the search processor (113) may search the database in this order. Hence, the probability of an early match is increased and the average search time is reduced.

The invention relates to a flight path planning method based on a sparse A* algorithm and a genetic algorithm and belongs to the technical field of flight path planning of an unmanned aerial vehicle (UAV). According to the characteristics of flight path planning, the method comprises the following steps: planning an initial reference flight path by the utilization of the sparse A*search (SAS) algorithm, wherein constraint conditions are combined into algorithm search, so that useless nodes in a search space can be effectively deleted and the search time is shortened; and when emergent threat occurs during real-time flight of the UAV, performing real-time flight path planning by the utilization of the genetic algorithm and generating a flight path with local optimum or approximate optimum until the threat disappears and the UAV returns the original global optimum reference flight path and continues flying. The method provided by the invention has high real-time performance and rapidity; the searched flight path is closer to the actual UAV optimal flight path; and the method can be applied to the technical fields of robot path planning, urban vehicle path planning and the like under complex environments.

A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. Prior to sampling and storage, the incoming signal is translated to an IF signal. Also prior to storage, the IF signal is corrected for a frequency offset signal. The frequency offset may be caused by many sources, Doppler shift or local oscillator error, for example. Once the signal is corrected for the frequency offset, the signal sample is stored in memory. The signal sample is read from memory as necessary to process the signal. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

A direct sequence spread spectrum receiver samples an incoming signal and translates the signal to an IF signal. The IF signal is sampled and stored in memory. In one embodiment, the memory consists of two memory banks which alternately receive sample segments. During a write period to one of the memory banks, the other memory bank supplies its output to a processor. This continues in a ping-pong manner. In another embodiment, a single memory bank is filled and read as necessary, the receiver ignoring incoming signal until the processor has completed processing the sample available at the output of the memory. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

A system and method for classifying user context in a customer self service system that performs resource search and selection and includes a context attribute database comprising types of user contexts and one or more context attributes associated with each user context for processing by the system, and context attribute function database comprising functions for computing values for each context attribute. The classifying system comprises a computing device for receiving a user query and a context vector comprising data associating an interaction state with the user and, processing the query and context vector against data included in the context attribute database and context attribute function database for predicting a particular user context. The classifier populates the user context vector with context parameters specifying a user interaction state for use in a subsequent resource search. The result of this invention is an ability to relieve the user of the nonproductive work of describing their context and the ability to improve the search value by including criteria derived from both data and behaviors in the general population which may be unknown to the user. The system and method is especially applicable for a self service system in a variety of customer self service domains including education, real estate and travel.

A direct sequence spread spectrum architecture permits low power consumption during a synchronization phase of data reception by allowing the receiver to be turned off during most of the acquisition phase of reception, or by using a parallel correlator to keep acquisition time short. The architecture is particularly suitable for global positioning satellite (GPS) signal processing and permits multiple satellite codes and multiple Doppler bins to be searched either sequentially, without requiring the receiver to be turned on during the search process. The receiver output baseband data is sampled and stored over a time interval sufficient to achieve acquisition and synchronization for any one code division multiple access (CDMA) signal at any specific Doppler shift. This sample is digitally recorded and re-played from memory as many times as may be required to acquire and synchronize each desired CDMA signal. To keep processing energy consumption low, an analog (capacitor-based) cross-correlator is used. The order of coherent and non-coherent processing for all code-Doppler channels is chosen to maximize energy efficiency while minimizing required processor hardware.

A mobile terminal is configured to receive wireless communications including GPS data from a terrestrial and/or satellite wireless network, and to perform pseudo-range measurements using the GPS data that is received. The mobile terminal may be configured to perform pseudo-range measurements by receiving GPS coarse/acquisition (C/A) signals from GPS satellites, estimating Doppler shifts in the received GPS C/A signals, and estimating received code phases of the GPS C/A signals using the Doppler shifts that are estimated. The estimated code phases and/or the estimated Doppler shifts of the GPS C/A signals can provide the pseudo-range measurements. By removing the Doppler shift from the received signal samples prior to performing the code phase measurement, reduced computational complexity and/or processing time may be obtained.

Techniques to create, generate, and deliver customized interactive program guide (custom-IPG). In one method, selections indicative of a set of channels to be included in the custom-IPG are received. In response, one or more custom-IPG screens having included therein the set of selected channels are rendered at a head end. The custom-IPG screens can be formed as subsets of the regular IPG screens, or as new screens. The rendered custom-IPG screens are provided from the head end to a set top terminal upon receiving a viewer request for the custom-IPG. Command indicative of a particular location at which to overlay the custom-IPG screens may also be received. In this case, the custom-IPG screens are re-rendered at the indicated location. The custom-IPG screens can be overlaid on a video sequence provided on a particular channel, which can be the channel currently being viewed, the channel used to carry regular program guide, or a channel that is independent of the channels used to carry regular programming and program guide. For example, either the custom or regular IPG can be provided on the program guide channel, depending on the viewer's selection.

Data definitions for digital assets, such as, for example, audio, video, photographs, graphics, and electronic documents, are provided that allow these different asset types to be stored in a single database. The definitions are preferably in XML and can be used as a standardized dictionary to more efficiently and economically manage digital assets, thus improving system interoperability between companies or organizations within a company. A digital asset ordering interface, hardware system, software arrangement, and application interface configuration advantageously using these data definitions are also provided.

The invention discloses a LTE PDCCH (Long Term Evolution System Physical Downlink Control Channel) blind inspection control method and device. According to the device, the PDCCH blind inspection times can be reduced by limiting polymerization grade ranges to be inspected in a certain range through a polymerization grade range calculation unit, a candidate PDCCH number calculation unit, an uplink/downlink scheduling state maintenance unit, a searching space state maintenance unit and a candidate PDCCH position calculation unit; and the repeated inspection of the same CCE (Control Channel Element) initial position in the same polymerization grade can be prevented by limiting the number of candidate PDCCH corresponding to each polymerization grade in a certain range; the inspected state of each CCE in a searching space is maintained to avoid the repeated inspection of CCE positions of detected DCI (Downlink Control Information) in different polymerization grades; and uplink/downlink scheduling states are maintained to reduce the inspection of uplink/downlink scheduling PDCCH number. By using all the units, the computation quantity and the searching time can be decreased; and the error inspection probability and the system power consumption can be reduced.

The invention proposes an algorithm of video pedestrian face detection and tracking through algorithms of motion object detection and motion object tracking, which pertains to the technical field of pattern recognition. The invention is composed of two main parts of a pedestrian face detection algorithm based on the motion object detection and a pedestrian face tracking algorithm based on the motion object tracking. The invention proposes the pedestrian face detection algorithm based on the motion object detection. The algorithm firstly utilizes a motion analysis method to detect the pedestrian, then calculates the gravity center of the human body and determines the face area according to the gravity center of the human body, and finally utilizes a skin-color model and a template matching method to detect the face in the face area. The invention proposes the pedestrian face tracking algorithm based on the motion object tracking. The algorithm tracks the face of the pedestrian through tracking the pedestrian, thereby effectively avoiding effects on the tracking of the face due to swing, rotation, expression, shelter and other factors of the face of the pedestrian.

A packet classification method through hierarchical rulebase partitioning. The packet classification method for searching for a rule having a highest priority and matching among a plurality of rules included in a specified rulebase with respect to a packet input from an external network and processing the packet according to the searched rule. The method includes: a preprocessing step of partitioning the rulebase into a plurality of independent sub-rulebases based on a specified condition and producing a hash table on the basis of the sub-rulebases; and a classification step of classifying the packet by searching the hash table using a hash key extracted from a packet header of the inputted packet and mapping the packet on the sub-rulebase corresponding to the packet.

Systems and methods of calibrating heliostat parameters for subsequent open-loop sun-tracking, the calibration based on driving artificial light source reflections from one or more heliostats into one or more image sensors.

A terminal equipped with a touchscreen and data search method using the touchscreen is provided. The data search method displays a list of data items and a scroll button in first and second display regions defined on the touchscreen, respectively, checks, when a touch is detected on the scroll button, a part of the second region at which the scroll button is placed, presents a value of tag information matched with the part, and displays at least one data item identified by the value of the tag information in the first display region.