Patent application number | Description | Published |
20110052023 | Reconstruction of Images Using Sparse Representation - A method for reconstructing an image includes steps of obtaining a measurement in a first domain, generating an estimate of the image in a second domain based at least in part on the measurement, generating a sparse representation in a third domain based at least in part on the estimate, and performing one or more iterations until the estimate is determined to satisfy one or more image quality criteria. A given iteration includes steps of generating a projection in the first domain based at least in part on the sparse representation, updating the sparse representation based at least in part on the projection, and updating the estimate based at least in part on the sparse representation. The method further includes a step of outputting the estimate determined to satisfy the one or more image quality criteria for use as the image. | 03-03-2011 |
20110293193 | Spatio-Temporal Image Reconstruction Using Sparse Regression and Secondary Information - A spatio-temporal image of an object is reconstructed based on captured data characterizing the object. The spatio-temporal image comprises a plurality of spatial images in respective time intervals, and at least a given one of the spatial images in one of the time intervals is reconstructed using not only captured data from a frame associated with that time interval but also captured data associated with one or more additional frames associated with other time intervals. The spatio-temporal image may be reconstructed by iteratively obtaining a solution to a minimization or maximization problem in a sparse domain and transforming the solution to an image domain. The transformation between the sparse domain and the image domain may utilize a spatio-temporal transformation implemented using a plurality of basis functions, one or more of which may be determined at least in part based on secondary information associated with the imaged object. | 12-01-2011 |
20130034277 | SYSTEMS AND METHODS FOR MODELING AND PROCESSING FUNCTIONAL MAGNETIC RESONANCE IMAGE DATA USING FULL-BRAIN VECTOR AUTO-REGRESSIVE MODEL - Systems and methods for modeling functional magnetic resonance image datasets using a multivariate auto-regressive model which captures temporal dynamics in the data, and creates a reduced representation of the dataset representative of functional connectivity of voxels with respect to brain activity. Raw spatio-temporal data is processed using a multivariate auto-regressive model, wherein coefficients in the model with high weights are retained as indices that best describe the full spatio-temporal data. When there are a relatively small number of temporal samples of the data, sparse regression techniques are used to build the model. The model coefficients are used to perform data processing functions such as indexing, prediction, and classification. | 02-07-2013 |
20130058548 | SPATIO-TEMPORAL IMAGE RECONSTRUCTION USING SPARSE REGRESSION AND SECONDARY INFORMATION - A method of generating an image includes the step of obtaining captured data characterizing an object. The method also includes the step of reconstructing a spatio-temporal image of the object based on the captured data, the spatio-temporal image comprising a plurality of spatial images in respective time intervals, with at least a given one of the spatial images in one of the time intervals being reconstructed using captured data from a frame associated with that time interval and captured data associated with one or more additional frames associated with other time intervals. The method further includes the step of outputting the spatio-temporal image. The obtaining, reconstructing and outputting steps are performed by a processing device comprising a processor coupled to a memory. | 03-07-2013 |
20140336998 | SYSTEMS AND METHODS FOR MODELING AND PROCESSING FUNCTIONAL MAGNETIC RESONANCE IMAGE DATA USING FULL-BRAIN VECTOR AUTO-REGRESSIVE MODEL - Systems and methods for modeling functional magnetic resonance image datasets using a multivariate auto-regressive model which captures temporal dynamics in the data, and creates a reduced representation of the dataset representative of functional connectivity of voxels with respect to brain activity. Raw spatio-temporal data is processed using a multivariate auto-regressive model, wherein coefficients in the model with high weights are retained as indices that best describe the full spatio-temporal data. When there are a relatively small number of temporal samples of the data, sparse regression techniques are used to build the model. The model coefficients are used to perform data processing functions such as indexing, prediction, and classification. | 11-13-2014 |
Patent application number | Description | Published |
20080267332 | METHOD AND SYSTEM FOR COMPENSATING FOR THE EFFECT OF PHASE DRIFT IN A DATA SAMPLING CLOCK - A method and system for compensating for the effect of phase drift in a data sampling clock during data transfer between sub-systems of an electronic device. The sub-systems of the electronic device transfer data frame by frame. Each frame includes multiple data windows. Each data window includes multiple data bits. The method includes sampling each of the one or more data bits of a data window at one or more early instances, a prompt instance, and one or more late instances. Further, the method includes calculating the phase-error value of the sampled data window, based on the data sampled. Furthermore, the method includes compensating for the effect of phase drift in the data sampling clock, based on the calculated phase error value. | 10-30-2008 |
20080310296 | Systems and Methods for Transmit-Only Peak-to-Average Ratio Reduction in the Oversampled Regime Using Reserved Tones - Systems and methods for reducing the peak-to-average power ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a time-domain compensation signal in the oversampled regime, using tones reserved for PAR reduction. A set of vectors corresponding to PAR tones is generated by processing out-of-phase symbols for each PAR tone to form a span matrix. The span matrix is used to find a best fit of a desired target signal to a time-domain compensation signal comprising only PAR tones. | 12-18-2008 |
20090310658 | Systems and Methods for Positioning and Messaging of Reserved Tones for Peak-to-Average Ratio (PAR) Reduction in DSL Systems - Systems and methods for reducing the peak-to-average ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a time-domain compensation signal which reduces the magnitude of peaks in the time-domain signal prior to transmission where the time-domain compensation signals use tones that are reserved for the purpose of reducing the PAR. The reservation of these reserved tones for PAR can be implemented by altering the typical startup procedures in a digital subscriber line (xDSL) system. The use of the reserved tones to reduce the PAR can be implemented using a low complexity algorithm or using an adaptive technique. | 12-17-2009 |
20090310659 | Adaptive Turbo Peak Mitigation for Peak-to-Average Ratio (PAR) Reduction Using Reserved Tones - Systems and methods for reducing the peak-to-average ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a time-domain compensation signal which reduces the magnitude of peaks in the time-domain signal prior to transmission where the time-domain compensation signals use tones that are reserved for the purpose of reducing the PAR. The reservation of these reserved tones for PAR can be implemented by altering the typical startup procedures in a digital subscriber line (xDSL) system. The use of the reserved tones to reduce the PAR can be implemented using a low complexity algorithm or using an adaptive technique. | 12-17-2009 |
20090310704 | Low Complexity Systems and Methods for Peak-to-Average Ratio (PAR) Reduction Using Reserved Tones - Systems and methods for reducing the peak-to-average ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a time-domain compensation signal which reduces the magnitude of peaks in the time-domain signal prior to transmission where the time-domain compensation signals use tones that are reserved for the purpose of reducing the PAR. The reservation of these reserved tones for PAR can be implemented by altering the typical startup procedures in a digital subscriber line (xDSL) system. The use of the reserved tones to reduce the PAR can be implemented using a low complexity algorithm or using an adaptive technique. | 12-17-2009 |
20100061437 | Systems and Methods for Impulse Noise Characterization - Impulse noise from nearby or intense electrical sources can disrupt communications over digital subscriber lines (DSL). The characterization of the nature, timing and length of impulse noise sources present on a DSL loop is a critical first step in mitigating the effect of impulse noise on DSL communications. DSL standards provide histograms for impulse length and inter-arrival time of impulses. These histograms can be used to derive the nature, maximum frequency and other statistics related to impulse noise on a DSL line. | 03-11-2010 |
20100177815 | SYSTEMS AND METHODS FOR PERFORMING COMBINED EQUALIZATION IN COMMUNICATION SYSTEMS - A system is described for performing combined equalization. The system comprises a time domain equalizer (TEQ) configured to receive a signal and shorten a CIR (channel impulse response) of the received signal, a Fast Fourier Transform (FFT) module for demodulating the received signal, and an equalization block for reducing inter-carrier interference (ICI) and inter-symbol interference (ISI). The equalization block comprises at least one of: a feed forward equalizer and a feed back equalizer. The system further comprises a slicer circuit configured to generate a hard-limited decision for a symbol corresponding to the received signal. | 07-15-2010 |
Patent application number | Description | Published |
20090012906 | AUCTION OF MULTIPLE HETEROGENEOUS ITEMS AMONG MULTIPLE BUYERS AND SELLERS USING SOFTWARE AGENTS LINKED VIA A COMMUNICATION NETWORK - A method, system and computer program product for conducting an online auction of a plurality of heterogeneous items between a plurality of selling and potential purchasing parties. The method includes the steps of accepting an offer in respect of an item, accepting one or more subsequent offers that is/are preferable to a previously accepted offer, and rejecting the previously accepted offer. While the offer/s is/are binding on a party making the offer, acceptance of the offer/s is/are not binding on a party accepting the offer. Classes of “seller strategies”, for offering items to potential purchasing parties, and “buyer strategies”, to decide which offers to accept, are also disclosed. As a result of the interaction of the buyer and seller strategies, the auction mechanism converges to an allocation of items to buyers at particular prices and assists in discovering a free and fair competitive equilibrium price. The auction is performed using terminals connected via a communications network and software-based agents hosted on the terminals, wherein the software-based agents act on behalf of the participating parties. | 01-08-2009 |
20090122938 | Method and System for Identifying Sources of Operating System Jitter - A method for tuning performance of an operating system, the method comprising identifying all sources of operating system jitter; measuring the impact of each of the operating system jitter source; and tuning performance of the operating system, preferably by use of different approaches/techniques, which could include removing the sources of operating system jitter and/or delaying their execution and/or smoothening their execution over a longer period of time. Computer program code and systems are also provided. | 05-14-2009 |
20130117145 | AUCTION OF MULTIPLE HETEROGENEOUS ITEMS AMONG MULTIPLE BUYERS AND SELLERS USING SOFTWARE AGENTS LINKED VIA A COMMUNICATION NETWORK - A method, system and computer program product for conducting an online auction of a plurality of heterogeneous items between a plurality of selling and potential purchasing parties. The method includes the steps of accepting an offer in respect of an item, accepting one or more subsequent offers that is/are preferable to a previously accepted offer, and rejecting the previously accepted offer. While the offer/s is/are binding on a party making the offer, acceptance of the offer/s is/are not binding on a party accepting the offer. Classes of “seller strategies”, for offering items to potential purchasing parties, and “buyer strategies”, to decide which offers to accept, are also disclosed. As a result of the interaction of the buyer and seller strategies, the auction mechanism converges to an allocation of items to buyers at particular prices and assists in discovering a free and fair competitive equilibrium price. | 05-09-2013 |
20130339359 | System and Method for Data Anonymization Using Hierarchical Data Clustering and Perturbation - A system and method for data anonymization using hierarchical data clustering and perturbation is provided. The system includes a computer system and an anonymization program executed by the computer system. The system converts the data of a high-dimensional dataset to a normalized vector space and applies clustering and perturbation techniques to anonymize the data. The conversion results in each record of the dataset being converted into a normalized vector that can be compared to other vectors. The vectors are divided into disjointed, small-sized clusters using hierarchical clustering processes. Multi-level clustering can be performed using suitable algorithms at different clustering levels. The records within each cluster are then perturbed such that the statistical properties of the clusters remain unchanged. | 12-19-2013 |