Patent application number | Description | Published |
20100219776 | MULTI-ENERGY FREQUENCY-MULTIPLYING PARTICLE ACCELERATOR AND METHOD THEREOF - A multi-energy frequency-multiplying particle accelerator and a method thereof are disclosed in order to overcome the drawbacks of the existing accelerator, such as single energy level, beam current and operating frequency limited by a single power source. The accelerator comprises a pulse power generation unit for generating N pulse signals with different power levels, N is equal to or greater than 2; N microwave power generation units for, under the control of a control signal, generating N microwaves with different energy levels based on said N pulse signals, respectively; a power mixing unit having N entrances and one exit and for inputting a corresponding microwave among said N microwaves from each of said N entrances and outputting said N microwaves from said one exit; a particle beam generation unit for generating N particle beams in synchronization with said N is microwaves; and an accelerating unit for using said N microwaves to accelerate said N particle beams, respectively. Since the multi-energy frequency-multiplying particle accelerator of the present invention can output alternately particle beams of different energy levels and thus has improved operating frequency and multiplied power, it will find a wider application prospect in the field of radiograph imaging, radioactive medicine and radiation processing industry. | 09-02-2010 |
20140185739 | CATHODE CONTROL MULTI-CATHODE DISTRIBUTED X-RAY APPARATUS AND CT DEVICE HAVING SAID APPARATUS - This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus. | 07-03-2014 |
20140185775 | STANDING WAVE ELECTRON LINEAR ACCELERATOR WITH CONTINUOUSLY ADJUSTABLE ENERGY - A standing wave electron linear accelerating apparatus and a method thereof are disclosed. The apparatus comprises an electron gun configured to generate electron beams; a pulse power source configured to provide a primary pulse power signal; a power divider coupled downstream from the pulse power source and configured to divide the primary pulse power signal outputted from the pulse power source into a first pulse power signal and a second pulse power signal; a first accelerating tube configured to accelerating the electron beams with the first pulse power signal; a second accelerating tube configured to accelerate the electron beams with the second pulse power signal; a phase shifter configured to continuously adjust a phase difference between the first pulse power signal and the second pulse power signal so as to generate accelerated electron beams with continuously adjustable energy at output of the second accelerating tube. | 07-03-2014 |
20140185776 | APPARATUSES AND METHODS FOR GENERATING DISTRIBUTED X-RAYS - An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target. | 07-03-2014 |
20150078509 | X-RAY APPARATUS AND A CT DEVICE HAVING THE SAME - A two dimensional array distributed x-ray apparatus of this disclosure comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in one plane in a two dimensional array on the wall of the vacuum box; an anode having targets corresponding to the plurality electron transmitting unit arranged in parallel with the plane of the plurality of electron transmitting units in the vacuum box; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply; wherein the anode comprises: an anode plate made of metal and parallel to the upper surface of the electron transmitting unit; a plurality of targets arranged on the anode plate and disposed corresponding to the positions of the electron transmitting unit, the bottom surface of the target is connected to the anode plate and the upper surface of the target has a predetermined angle with the anode plate. | 03-19-2015 |
20150078510 | X-RAY APPARATUS AND A CT DEVICE HAVING THE SAME - The present application provides a curved surface array distributed x-ray apparatus, characterized in that, it comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged on the wall of the vacuum box in multiple rows along the direction of the axis of the curved surface in the curved surface facing the axis; an anode made of metal and arranged in the axis in the vacuum box which comprises an anode pipe and an anode target surface; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply. | 03-19-2015 |
20150078511 | X-RAY APPARATUS AND A CT DEVICE HAVING THE SAME - A x-ray apparatus of the present application comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in a linear array and installed on the wall at one end within the vacuum box, each electron transmitting unit is independent to each other; the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; a grid arranged above the cathode opposing the cathode; anode made of metal and installed at the other end of the vacuum box, and in the direction of length, the anode is parallel to the plane of the grid of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the grid of the electron transmitting unit. | 03-19-2015 |
20150078532 | X-RAY APPARATUS AND A CT DEVICE HAVING THE SAME - The present application provides an external thermionic cathode distributed x-ray apparatus, comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in a linear array and installed on the side wall of the vacuum box, each electron transmitting unit is independent to each other; an anode installed in the center inside the vacuum box, and in the direction of length, the anode is parallel to the orientation of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the electron transmitting unit; and a power supply and control system having a high voltage power supply, a focusing power supply; a transmitting control means and a control system; the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; an insulated support enclosing the heating filament and the cathode; a focusing electrode, arranged at the upper end of the insulated support by way of locating above the cathode; and a connecting fastener arranged above the focusing electrode and connected to the wall of the vacuum box; wherein, the filament lead is connected to the transmitting control means through the insulated support. | 03-19-2015 |
20150084549 | METHODS FOR CONTROLLING STANDING WAVE ACCELERATOR AND SYSTEMS THEROF - The present disclosure discloses a method for controlling a standing wave accelerator and a system thereof. The method comprises: generating, by an electron gun, an electron beam; injecting the electron beam into an accelerating tube; and controlling a microwave power source to generate and input microwave with different frequencies into the accelerating tube, so that the accelerating tube switches between different resonant modes at a predetermined frequency to generate electron beams with corresponding energy. According to the above solution, it only needs to change the output frequency of the microwave power source in the process of adjusting energy, without making any change to the accelerating structure per se. Therefore, the method is easy to operate. In addition, the structure of the accelerating tube in the above system is simple, without adding a particular regulation apparatus. | 03-26-2015 |
20150084550 | ELECTRON LINEAR ACCELERATOR SYSTEMS - The present disclosure discloses an electron linear accelerator system. In the present disclosure, a fast-switching dual-path microwave system is proposed, wherein, one path can be directly connected to an accelerating tube, and the other path can be input into the accelerating tube after a magnitude of the microwave power is changed by devices such as an attenuator, a power divider, a pulse compressor or even an amplifier etc., so as to achieve fast switch of the power input into the accelerator and adjust the energy output by the accelerator. | 03-26-2015 |
Patent application number | Description | Published |
20100213790 | ELECTROSTRICTIVE COMPOSITE, METHOD FOR MAKING THE SAME AND ELECTROTHERMIC TYPE ACTUATOR - An electrostrictive composite includes a first material layer and a second material layer. The first material layer and the second material layer are stacked to each other. The thermal expansion coefficients of the first material layer and the second material layer are different. The first material layer includes a polymer matrix and a plurality of carbon nanotubes dispersed therein. Also an electrothermic type actuator using the electrostrictive composite is provided. | 08-26-2010 |
20100272950 | Positive and negative poisson ratio material - A Poisson's ratio material includes a carbon nanotube film structure. The carbon nanotube film structure includes a plurality of carbon nanotubes. A first part of the carbon nanotubes are aligned a first direction, a second part of the carbon nanotubes are aligned a second direction. The first direction is substantially perpendicular to second direction. When the Poisson's ratio material is stretched or compressed substantially along the first or second direction, a Poisson's ratio value is negative. When the Poisson's ratio material is stretched or compressed in a direction having an angle of about 45 degrees with the first direction, the Poisson's ratio value is positive. | 10-28-2010 |
20110012476 | Electrostrictive composite and electrostrictive element using the same - An electrostrictive composite includes a flexible polymer matrix and a number of one dimensional conductive materials dispersed in the flexible polymer matrix. The flexible polymer matrix is a sheet. The one dimensional conductive materials cooperatively form an electrically conductive structure in the flexible polymer matrix. The one dimensional conductive materials are oriented substantially along a same preferred direction. | 01-20-2011 |
20110094217 | ELECTROSTRICTIVE COMPOSITE AND ELECTROSTRICTIVE ELEMENT USING THE SAME - An electrostrictive composite includes a flexible polymer matrix and a carbon nanotube film structure. The carbon nanotube film structure is located on a surface of the flexible polymer matrix, and at least partly embedded into the flexible polymer matrix through the first surface. The carbon nanotube film structure includes a plurality of carbon nanotubes combined by van der Waals attractive force therebetween. | 04-28-2011 |
20110137577 | STRAIN MEASUREMENT DEVICE AND METHOD OF STRAIN MEASUREMENT USING THE SAME - A strain measurement device includes a strain gauge, a holding device, a transverse strain recorder, and a data processing device. The strain gauge includes at least one first and at least one second layers of carbon nanotube films, each layer of carbon nanotube films having a plurality of carbon nanotubes. The carbon nanotubes in at least one first layer of carbon nanotube film align along a first direction. The carbon nanotubes in at least one second layer of carbon nanotube film align along a second direction. The holding device is used to fasten a specimen and the strain gauge. The transverse strain recorder is used to record a transverse strain of the strain gauge. The data processing device is used to calculate an axial strain of the strain gauge. | 06-09-2011 |
20110234053 | ELECTROSTRICTIVE STRUCTURE INCORPORATING CARBON NANOTUBES AND ELECTROSTRICTIVE ACTUATOR USING THE SAME - An electrostrictive structure includes a flexible polymer matrix and a carbon nanotube film structure at least partly embedded into the flexible polymer matrix. The carbon nanotube film structure includes a number of carbon nanotubes combined by van der Waals attractive force therebetween. The carbon nanotube film structure extends in a curve in the flexible polymer matrix. | 09-29-2011 |
20110266927 | CARBON NANOTUBE BASED ELECTROSTRICTIVE COMPOSITE AND ELECTROSTRICTIVE ELEMENT USING THE SAME - An electrostrictive composite includes two electrostrictive layers spaced with each other. The electrostrictive layers extend from a first side to a second side. The first side is spaced with and correspond to the second side. The electrostrictive layers are electrically connected with each other at the first side. The electrostrictive layers are insulated from each other at the second side. | 11-03-2011 |
20120172953 | THERMAL THERAPY DEVICE INCORPORATING CARBON NANOTUBES - A thermal therapy device includes a substrate and at least one heating unit arranged on the substrate. The at least one heating unit includes a heating element, a first electrode, and a second electrode. The heating element includes a carbon nanotube film structure and a polymer matrix. The carbon nanotube film structure is substantially parallel to and offset from a central plane of the polymer matrix. The first electrode and the second electrode are electrically connected to the carbon nanotube film structure, and control the amount of heat and deformation produced by the carbon nanotube film structure. | 07-05-2012 |
20120193568 | ELECTROSTRICTIVE COMPOSITE AND METHOD FOR MAKING THE SAME - An electrostrictive composite includes a flexible polymer matrix and a plurality of carbon nanotubes dispersed in the flexible polymer matrix. The carbon nanotubes cooperatively form an electrically conductive network in the flexible polymer matrix. A plurality of bubbles are defined by the flexible polymer matrix. | 08-02-2012 |
20130026410 | ELECTROSTRICTIVE COMPOSITE AND METHOD FOR MAKING THE SAME - An electrostrictive composite includes a flexible polymer matrix, a plurality of carbon nanotubes and a plurality of reinforcing particles dispersed in the flexible polymer matrix. The carbon nanotubes cooperatively form an electrically conductive network in the flexible polymer matrix. | 01-31-2013 |
20130026679 | METHOD FOR USING A POISSON RATIO MATERIAL - A method for using a Poisson's ratio material includes a carbon nanotube film structure is provided. The carbon nanotube film structure includes a plurality of carbon nanotubes. A first part of the carbon nanotubes are aligned a first direction, a second part of the carbon nanotubes are aligned a second direction. The first direction is substantially perpendicular to second direction. When the Poisson's ratio material is stretched or compressed substantially along the first or second direction, a Poisson's ratio value is negative. When the Poisson's ratio material is stretched or compressed in a direction having an angle of about 45 degrees with the first direction, the Poisson's ratio value is positive. | 01-31-2013 |
20130082423 | METHOD FOR MAKING ELECTROSTRICTIVE COMPOSITE - A method for making an electrostrictive composite is provided. A number of carbon nanotubes, a number of reinforcing particles, and a polymer precursor are provided. The carbon nanotubes, the reinforcing particles, and the polymer precursor are mixed to obtain a mixture. The polymer precursor in the mixture is polymerized and cured. | 04-04-2013 |
20130233475 | METHOD FOR MAKING ELECTROSTRICTIVE COMPOSITE - A method for making an electrostrictive composite includes the following steps. Carbon nanotubes and a first polymer precursor are mixed. The first carbon nanotubes and the polymer precursor are polymerized to obtain a first material layer. A second material layer is applied to the first material layer, wherein the thermal expansion coefficient of the first material layer is different from the thermal expansion coefficient of the second material layer. | 09-12-2013 |
20130333374 | ELECTROSTRICTIVE COMPOSITE AND ELECTROSTRICTIVE ELEMENT USING THE SAME - An electrostrictive composite includes a flexible polymer matrix and a carbon nanotube film structure. The carbon nanotube film structure is at least partially embedded into the flexible polymer matrix through a first surface. The carbon nanotube film structure includes a plurality of carbon nanotubes combined by van der Waals attractive force therebetween. | 12-19-2013 |
20130341829 | METHOD FOR USING A POISSON RATIO MATERIAL - A method for using a Poisson's ratio material includes a carbon nanotube film structure is provided. The carbon nanotube film structure includes a plurality of carbon nanotubes. A first part of the carbon nanotubes are aligned a first direction, a second part of the carbon nanotubes are aligned a second direction. The first direction is substantially perpendicular to second direction. When the Poisson's ratio material is stretched or compressed substantially along the first or second direction, a Poisson's ratio value is negative. | 12-26-2013 |
20140015372 | CARBON NANOTUBE BASED ELECTROSTRICTIVE ELEMENT - An carbon nanotube based electrostrictive element includes two electrostrictive layers spaced with each other, an electrical connector, and two electrodes. The two electrostrictive layers are electrically connected to each other at a first side, and spaced and insulated from each other at a second side via the electrical connector. The two electrodes are located at the second side and electrically connected respectively to the two electrostrictive layers. | 01-16-2014 |
Patent application number | Description | Published |
20080256444 | Internet Visualization System and Related User Interfaces - Systems and methods are described for an Internet visualization system and related user interfaces. In one implementation, the system analyzes Internet search logs to determine most popular search queries across the world at a current time. A user interface displays a keyword of each of the most popular queries in a single visual display that relates each query to a geographical location of greatest popularity. The system can also filter queries according to demographics. In one implementation the user interface provides a 3-dimensional Internet visualization that adopts an ocean or seascape theme. The ocean floor displays a map of the world, and query bubbles rise from geographical locations on the map. The size and duration of each query bubble denotes the relative popularity of a given query. | 10-16-2008 |
20090132530 | WEB CONTENT MINING OF PAIR-BASED DATA - Described herein is technology for, among other things, mining pair-based data on the web. The technology involves an online pair-based data mining system as well as an offline SVM training system. By subjecting a pair-based input data to the systems, one may grow a pool of pair-based data which share characteristics of the pair-based input data in more efficient manner. | 05-21-2009 |
20090193047 | CONTRUCTING WEB QUERY HIERARCHIES FROM CLICK-THROUGH DATA - The claimed subject matter is directed to constructing query hierarchies in response to a query request. To construct a query hierarchy, a list of related candidate queries is generated in response to the received query request. The list of related candidate queries is generated by determining the relative coverage of information shared by the candidate queries and the query request. Relationships between the submitted query request and the candidate queries in the list are determined based upon the extent of relative coverage of information shared by the candidate queries and the query request. A query hierarchy is then constructed to reflect the determined relationships between the query request and the candidate queries. | 07-30-2009 |
20100088303 | MINING NEW WORDS FROM A QUERY LOG FOR INPUT METHOD EDITORS - Described is a technology in which new words (including a phrase or set of Chinese characters) are mined from a query log. The new words may be added to (or otherwise supplement) an IME dictionary. A set of candidate queries may be selected from the log based upon market (e.g., the Chinese market) and/or by language. From this set, various filtering steps are performed to locate only new words that are frequently in used. For example, only frequent queries are kept for further processing, which may include filtering out queries based on length (e.g., less than two or greater than eight Chinese characters), and/or filtering out queries based on too many stop-words in the query. Processing may also include filtering out a query that is a substring of a larger query, or Vice-versa. Also described is Pinyin-based clustering and filtering, and filtering out queries already handled in the dictionary. | 04-08-2010 |
20100161642 | MINING TRANSLATIONS OF WEB QUERIES FROM WEB CLICK-THROUGH DATA - Methods and technologies providing translations of web queries based on an analysis of user behavior in click-through data. These methods and technologies generates large-scale and timely query translation pairs guided by a small set of seed word pairs from a dictionary, without relying on additional knowledge or complex models. | 06-24-2010 |
20110213763 | WEB CONTENT MINING OF PAIR-BASED DATA - Described herein is technology for, among other things, mining pair-based data on the web. The technology involves an online pair-based data mining system as well as an offline SVM training system. By subjecting a pair-based input data to the systems, one may grow a pool of pair-based data which share characteristics of the pair-based input data in more efficient manner. | 09-01-2011 |
20110295774 | Training SVMs with Parallelized Stochastic Gradient Descent - Techniques for training a non-linear support vector machine utilizing a stochastic gradient descent algorithm are provided. The computations of the stochastic gradient descent algorithm are parallelized via a number of processors. Calculations of the stochastic gradient descent algorithm on a particular processor may be combined according to a packing strategy before communicating the results of the calculations with the other processors. | 12-01-2011 |
20110302031 | CLICK MODELING FOR URL PLACEMENTS IN QUERY RESPONSE PAGES - A “General Click Model” (GCM) is constructed using a Bayesian network that is inherently capable of modeling “tail queries” by building the model on multiple attribute values that are shared across queries. More specifically, the GCM learns and predicts user click behavior towards URLs displayed on a query results page returned by a search engine. Unlike conventional click modeling approaches that learn models based on individual queries, the GCM learns click models from multiple attributes, with the influence of different attribute values being measured by Bayesian inference. This provides an advantage in learning that enables the GCM to achieve improved generalization and results, especially for tail queries, than conventional click models. In addition, most conventional click models consider only position and the identity of URLs when learning the model. In contrast, the GCM considers more session-specific attributes in making a final prediction for anticipated or expected user click behaviors. | 12-08-2011 |
20120123993 | Action Prediction and Identification Temporal User Behavior - User behavior modeling can include determining temporal- or time-based actions performed by various users. From the mined temporal-based user actions, future actions can be predicted. Certain implementations include providing information and/or services based on the predicted future actions. Some implementations, include providing relevant information, services, and/or goods regarding the predicted future action. | 05-17-2012 |
20120143789 | CLICK MODEL THAT ACCOUNTS FOR A USER'S INTENT WHEN PLACING A QUIERY IN A SEARCH ENGINE - A method of generating training data for a search engine begins by retrieving log data pertaining to user click behavior. The log data is analyzed based on a click model that includes a parameter pertaining to a user intent bias representing the intent of a user in performing a search in order to determine a relevance of each of a plurality of pages to a query. The relevance of the pages is then converted into training data. | 06-07-2012 |
20120143790 | RELEVANCE OF SEARCH RESULTS DETERMINED FROM USER CLICKS AND POST-CLICK USER BEHAVIOR OBTAINED FROM CLICK LOGS - Data from a click log may be used to generate training data for a search engine. User click behavior and user post-click behavior may be used to assess the relevance of a page to a query. Labels for training data may be generated based on data from the click log. The labels may pertain to the relevance of a page to a query. For example, user post-click behavior that may be examined includes the amount of time that a user remains on a target page when a user clicks one of the search results. | 06-07-2012 |
20130173571 | CLICK NOISE CHARACTERIZATION MODEL - The techniques discussed herein consider a degree of noise associated with user clicks performed during search sessions. The techniques then generate a model that characterizes click noise so that search engines can more accurately infer document relevance. | 07-04-2013 |
20130218824 | Action Prediction and Identification of User Behavior - User behavior modeling can include determining actions performed by various users. From the mined user actions, future actions can be predicted. Certain implementations include providing information and/or services based on the predicted future actions. Some implementations, include providing relevant information, services, and/or goods regarding the predicted future action. | 08-22-2013 |
20140052751 | SMART USER-CENTRIC INFORMATION AGGREGATION - A smart user-centric information aggregation system allows a user to define a region of content displayed in a display of a device and performs information aggregation on behalf of the user. The smart user-centric information aggregation system searches, aggregates and groups information related to content included in the region of content for the user while the user can continue to perform his/her original course of actions without interruption. After finding information related to the desired content, the smart user-centric information aggregation system may notify the user and present the found information to the user upon receiving confirmation from the user. The smart user-centric information aggregation system may continue to find new related information and update the presentation with the newly found information periodically, in some instances without user intervention or input. | 02-20-2014 |
Patent application number | Description | Published |
20110158337 | OFDM TRANSMITTER AND METHODS FOR REDUCING THE EFFECTS OF SEVERE INTERFERENCE WITH SYMBOL LOADING - Embodiments of an OFDM transmitter and method of reducing the effects of interference on subcarriers in an OFDM system by symbol loading are disclosed herein. A linear transformation is performed on a group of two or more input data symbols that are mapped to different signal dimensions to generate a corresponding two or more output data symbols. Each of the output data symbols has an increased number of constellation points. Each output data symbol is configured for transmission within one of the different signal dimensions. The linear transformation is configured so that each of the two or more output data symbols carry the information of each of the input data symbols of the group. This coding together of input data symbols that are mapped to different signal dimensions may provide improved reliability against fading and severe interference. The different signal dimensions may comprise a frequency, a time and/or a space dimension. | 06-30-2011 |
20110249655 | TECHNIQUES USING DIFFERENTIAL PRECODING FOR HIGHLY CORRELATED CHANNELS IN WIRELESS NETWORKS - An embodiment of the present invention provides a method of using differential precoding for highly correlated channels in a wireless network, comprising, using a differential codebook optimized for highly correlated antennas. | 10-13-2011 |
20110268102 | TECHNIQUES FOR FORMATTING SIGNALS FOR TRANSMISSION USING A WIRELESS NETWORK - Techniques are described for forming signals for transmission to a receiver. Two transmitters can form resource blocks with different Physical Uplink Control Channel (PUCCH) demodulation reference signal (DMRS) patterns that are orthogonal over time and/or frequency to each other. The transmitters can simultaneously transmit the same resource block but with different DMRS patterns. If a receiver is mounted with two antennas, the receiver can utilize a MIMO receiver to differentiate resource blocks from two transmitters. | 11-03-2011 |
20120038521 | Configurable common rerfernce signal port for reference signal received power in distributed antenna systems - A method of determining reference signal received power (RSRP) by user equipment (UE) associated with a distributed antenna system (DAS) may include detecting at least three different reference signals in one or more common reference signals (CRSs) that are associated with different antennas in the DAS. The method may also include determining at least three different RSRPs corresponding to the at least three different reference signals. The at least three different RSRPs may be level 3 filtered to produce at least three corresponding filtered powers. The UE may report a maximum of the at least three corresponding filtered powers to the distributed antenna system. | 02-16-2012 |
20120082190 | PMI FEEDBACK WITH CODEBOOK INTERPOLATION - Various embodiments of this disclosure may describe apparatuses, methods, and systems for interpolation of precoding matrixes to increase feedback accuracy of the channel state information (CSI) feedback in a wireless communication network. Other embodiments may also be disclosed or claimed. | 04-05-2012 |
20120113830 | ENHANCED NODE B AND METHOD FOR PRECODING WITH REDUCED QUANTIZATION ERROR - Embodiments of an enhanced Node B (eNB) and method for precoding with reduced quantization error are generally described herein. In some embodiments, first and second precoding-matrix indicator (PMI) reports may be received on an uplink channel and a single subband precoder matrix may be interpolated from precoding matrices indicated by both the PMI reports. Symbols for multiple-input multiple output (MIMO) beamforming may be precoded using the interpolated precoder matrix computed for single subband for a multiple user (MU)-MIMO downlink orthogonal frequency division multiple access (OFDMA) transmission. In some embodiments, each of the first and second PMI reports includes a PMI associated with a same subband that jointly describes a recommended precoder. | 05-10-2012 |
20120176965 | CQI DEFINITION FOR TRANSMISSION MODE 9 IN LTE-ADVANCED - An evolved Node B (eNB) in a 3GPP LTE-based network receives Channel State Information-Reference Signal (CSI-RS) from a User Equipment (UE) that is configured with Precoder Matrix Indictor (PMI) disabled. A channel is estimated between the eNB and the UE for link adaptation in Transmission Mode 9 (TM9) based on CSI-RS by the UE and SRS by the eNB. CQI is calculated at UE such that if a number of CSI-RS antenna ports equals one, TM9 transmission from the eNB to the UE uses a predetermined single antenna port. If the number of CSI-RS antenna ports equals two, TM9 transmission from the eNB to the UE uses transmit diversity. If the number of CSI-RS antenna ports does not equal one or two, TM9 transmission from the eNB to the UE uses spatial multiplexing based on a rank-1 precoder that is determined from a wideband channel covariance matrix R. | 07-12-2012 |
20130188566 | LTE ENHANCEMENTS FOR SMALL PACKET TRANSMISSIONS - Disclosed in some examples is a method of wireless resource block assignment in a long term evolution wireless network including creating a downlink control information message for a user equipment, the downlink control information message comprising: a resource block assignment field which indicates up to N physical resource blocks scheduled to the user equipment by specifying an index into a plurality of all possible physical resource block allocations of between 1 and N resource blocks, wherein the resource block assignment field comprises at most a number of bits necessary to address all of the possible physical resource block allocations for assignments of 1 to N physical resource blocks, and wherein N is less than a total number of physical resource blocks; and sending the downlink control information over a physical downlink control channel using orthogonal frequency division multiplexing. | 07-25-2013 |
20130195070 | TIME AND FREQUENCY SYNCHRONIZATION FOR LTE-ADVANCED NEW CARRIER TYPE - A particular kind of component carrier that may be used as a secondary cell in an LTE system is a new type carrier that has reduced or eliminated legacy control signaling such as the omission of CRSs. Alternative techniques are described for performing timing and frequency synchronization in the downlink between an eNB and a UE when CRSs are not present in a component carrier. These techniques involve using either channel state information reference signals or UE-specific reference signals. | 08-01-2013 |
20130223495 | TECHNIQUES USING DIFFERENTIAL PRECODING FOR HIGHLY CORRELATED CHANNELS IN WIRELESS NETWORKS - An embodiment of the present invention provides a method of using differential precoding feedback for correlated channels, comprising, transmitting by a mobile station (MS) as feedback an index angle for a differential discrete Fourier transform (DFT) codeword corresponding to a shift of a dominant beam represented by a base codeword, where the feedback corresponds to a precoding vector V(t)=Q({circumflex over (θ)}) for index angle θ, where | 08-29-2013 |
20130242770 | In enhanced physical downlink control channel (ePDCCH) - Technology for transmitting a distributed control channel element (CCE) for an enhanced physical downlink control channel (ePDCCH) and a localized CCE in a physical resource block (PRB) pair from a node and technology for physical downlink shared channel (PDSCH) physical resource block (PRB) allocation with at least one enhanced physical downlink control channel (ePDCCH) at a wireless device is disclosed. One method can include a node precoding at least one distributed CCE and at least one localized CCE for the PRB pair. The node can transmit the at least one distributed CCE for transmit diversity using at least two user equipment-specific reference signal (UERS) ports and transmitting the at least one localized CCE in the PRB pair. The at least two UERS ports can be used to transmit two CCEs. | 09-19-2013 |
20130242885 | ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (ePDCCH) INTER-CELL INTERFERENCE COORDINATION (ICIC) - Technology for communicating enhanced physical downlink control channels (ePDCCHs) configured for inter-cell interference coordination (ICIC) for a plurality of cells in a physical resource block (PRB) is disclosed. One method can include a node mapping a serving cell control channel element (CCE) in an serving cell ePDCCH in a PRB and a coordination cell CCE in a coordination cell ePDCCH in the PRB. The node can transmit the map of the serving cell CCE and the coordination cell CCE to a wireless device. | 09-19-2013 |
20130242886 | ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (ePDCCH) WITH PHYSICAL RESOURCE BLOCK (PRB) BUNDLING - Technology for physical resource block (PRB) bundling an enhanced physical downlink control channel (ePDCCH) with a physical downlink shared channel (PDSCH) is disclosed. One method can include a wireless device receiving from a node the ePDCCH in an ePDCCH PRB contiguous in frequency with a PDSCH PRB carrying the PDSCH. The wireless device can PRB bundle the ePDCCH PRB with the PDSCH PRB. | 09-19-2013 |
20130243118 | MOBILE DEVICE TRANSMITTER AND METHODS FOR TRANSMITTING SIGNALS IN DIFFERENT SIGNAL DIMENSIONS FOR 3GPP LTE - Embodiments of a mobile device transmitter and methods for transmitting signals in different signal dimensions are generally disclosed herein. The mobile device transmitter comprises a mapper to map a block of two or more input modulation symbols to different signal dimensions comprising two or more spatial dimensions, and linear transform circuitry to perform a linear transform on the block of mapped input modulation symbols to generate a block of preceded complex-valued output symbols such that each output symbol carries some information of more than one input modulation symbol. The mobile device also comprises transmitter circuitry to generate time-domain signals from the blocks of precoded complex-valued output symbols for each of the spatial dimensions for transmission using the two or more antennas. The precoded complex-valued output symbols are mapped to different signal dimensions comprising at least different frequency dimensions prior to transmission. | 09-19-2013 |
20130265975 | Transmitting Uplink Control Information - In accordance with some embodiments, uplink control information, including a channel quality index, may be transmitted using at least two layers. As a result, more information can be provided for use in situations, such as those involving carrier aggregation, where information for a large number of component carriers must all be provided on one primary component carrier. | 10-10-2013 |
20130272182 | D2D CONNECTION RECOVERY SCHEMES - Schemes for recovering D2D connections between terminals (UEs) in an LTE network are described. The schemes may be applied in situations where a D2D connection is established between two UEs but is lost by, for example, one of the UEs entering a sleep state. The schemes may be applied to either centralized or distributed D2D systems. Some of the schemes are eNB-assisted while others are performed solely by the UEs. | 10-17-2013 |
20130272196 | INTERFERENCE NOTIFICATION IN DEVICE-TO-DEVICE COMMUNICATION - Systems and techniques for wireless device-to-device (D2D) communication are provided herein. A D2D group identifier may be included in wireless transmissions within D2D groups. D2D interference mitigation processes may be initiated when a D2D group identifier is detected by a wireless device outside the D2D group. | 10-17-2013 |
20130272214 | MAPPING OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION NETWORK - In embodiments, an evolved Node B (eNB) of a wireless communication network may map individual enhanced control channel elements (eCCEs) of a physical resource block (PRB) pair to a plurality of non-continuous enhanced resource element groups (eREGs) of the PRB pair. The eNB may further map the plurality of eREGs to individual antenna ports for transmission to the UE, with individual antenna ports associated with a continuous group of eREGs. The eNB may assign at least a portion of an enhanced physical downlink control channel (ePDCCH) to one or more of the eCCEs for transmission to the UE. Additionally, or alternatively, an eNB may map eCCEs of a plurality of PRB pairs to a plurality of distributed resource block (DRB) pairs. | 10-17-2013 |
20130272262 | MULTI-ACCESS SCHEME AND SIGNAL STRUCTURE FOR D2D COMMUNICATIONS - A signal structure for use in D2D communications is described. In one embodiment, a preamble for automatic gain control at the receiver end is included in the transmitted signal. Techniques for scheduling of D2D transmissions using carrier sensing multiple access (CSMA) and a power control schemes for interference management are also described. | 10-17-2013 |
20130273923 | APPARATUS AND METHOD TO ENABLE DEVICE-TO-DEVICE (D2D) DISCOVERY IN CELLULAR NETWORKS - An apparatus and method of allowing user equipment (UE) to transmit information directly with other user equipment, using a device-to-device (D2D) mode is disclosed herein. A D2D UE (dUE | 10-17-2013 |
20130287000 | TECHNIQUES FOR FORMATTING SIGNALS FOR TRANSMISSION USING A WIRELESS NETWORK - Techniques are described for forming signals for transmission to a receiver. Two transmitters can form resource blocks with different Physical Uplink Control Channel (PUCCH) demodulation reference signal (DMRS) patterns that are orthogonal over time and/or frequency to each other. The transmitters can simultaneously transmit the same resource block but with different DMRS patterns. If a receiver is mounted with two antennas, the receiver can utilize a MIMO receiver to differentiate resource blocks from two transmitters. | 10-31-2013 |
20130287139 | SYSTEM AND METHOD OF RANK ADAPTATION IN MIMO COMMUNICATION SYSTEM - An apparatus may include a transmitter arranged to wirelessly transmit channel status reports for channels within a transmission band to a base station and a processor. The apparatus may further include a rank adaptation (RA) module operable on the processor to direct the transmitter to send a multiplicity of sub-band channel quality indicator (CQI) reports, each sub-band CQI report comprising a measurement of a respective sub-band of the transmission band and a multiplicity of rank indicator (RI) reports, where each sub-band CQI report is accompanied by an RI report. The apparatus may further include a digital display arranged to display information transmitted via the base station to the apparatus. Other embodiments are disclosed and claimed. | 10-31-2013 |
20130294390 | SYSTEM AND METHOD OF UPLINK POWER CONTROL IN A WIRELESS COMMUNICATION SYSTEM - An apparatus may include a transceiver operable to receive a downlink message from a base station for a serving cell, the downlink message allocating a set of control parameters. The apparatus may also include a processor circuit communicatively coupled to the transceiver and an uplink power control module operable on the processor circuit to read the set of control parameters, and apply a signal-to-noise-and-interference (SINR) parameter based on the received set of control parameters to determine physical uplink shared channel (PUSCH) power to be applied for a PUSCH transmission. Other embodiments are disclosed and claimed. | 11-07-2013 |
20130301549 | DOWNLINK CONTROL INDICATION FOR A STAND-ALONE NEW CARRIER TYPE (NCT) - Technology for determining a common search space (CSS) from a physical resource block (PRB) indication for a stand-alone carrier type is disclosed. In an example, a user equipment (UE) configured for determining a common search space (CSS) from a physical resource block (PRB) indication for a stand-alone carrier type can include a processing module to: Determine a PRB set in the CSS from an enhanced physical hybrid automatic repeat request (ARQ) indicator channel (ePHICH) configuration information in a master information block (MIB); and decode an enhanced physical downlink control channel (ePDCCH) or the ePHICH from PRB region candidates in the PRB set. | 11-14-2013 |
20130303167 | COORDINATED DYNAMIC POINT SELECTION (DPS) WITH CELL RANGE EXPANSION IN A COORDINATED MULTIPOINT (CoMP) SYSTEM - Technology for mitigating edge effect interference in a Coordinated MultiPoint (CoMP) system having multiple CoMP clusters is disclosed. In an example, a method can include a macro node transmitting a cell range expansion request to user equipments (UEs) within a cell. A CoMP cluster for nodes within the cell that includes UEs operating with the cell range expansion can be generated. Blanked resources between a plurality of macro nodes for the CoMP clusters in the CoMP system can be coordinated using a muting preference including a blanked resource. | 11-14-2013 |
20130336152 | STRUCTURED CODEBOOK FOR UNIFORM CIRCULAR ARRAY (UCA) - Embodiments of the present disclosure describe method, apparatus, and system configurations that implement or otherwise use a codebook designed for antennas configured in a circular array. A method includes receiving, by user equipment (UE) from an enhanced node B (eNB) station of a wireless communication network, a Channel State Information Reference Signal (CSI-RS) for the UE to perform channel measurements of multiple antennas of the eNB station, wherein the multiple antennas are configured in one or more circular arrays, performing, by the UE, channel measurements of the multiple antennas of the eNB station using the received CSI-RS, and determining, by the UE, a code word based on the channel measurements, the code word being stored in a codebook designed for a circular antenna array. Other embodiments may be described and/or claimed. | 12-19-2013 |
20130344816 | MOBILITY MEASURMENT USING CSI-RS IN ADDITIONAL CARRIER - A system and a method for a mobility measurement in a wireless network comprises determining at a wireless terminal a channel power estimation E | 12-26-2013 |
20140003240 | SUPPORTING MEASURMENTS AND FEEDBACK FOR 3D MIMO WITH DATA TRANSMISSION OPTIMIZATION | 01-02-2014 |
20140003262 | SOUNDING REFERENCE SIGNAL (SRS) MECHANISM FOR INTRACELL DEVICE-TO-DEVICE (D2D) COMMUNICATION | 01-02-2014 |
20140016714 | LARGE DELAY CYCLIC DELAY DIVERSITY (CDD) PRECODER FOR OPEN LOOP MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) - A physical channel processor on a wireless device and method for precoding for spatial multiplexing in an open-loop multiple-input multiple-output (MIMO) mobile communication system is disclosed. The method comprises the operation of receiving an input vector block from a layer mapper. The input vector block includes user equipment-specific reference signals (UE-RSs) or data in a physical downlink shared channel (PDSCH). The operation of generating a large delay cyclic delay diversity (CDD) vector block from the input vector block using a precoder configured for large delay CDD on an antenna port follows. The data can be resource element mapped with UE-RSs or channel-state information reference signals (CSI-RSs) in a physical resource block (PRB). | 01-16-2014 |
20140029532 | UPLINK POWER CONTROL FOR PHYSICAL UPLINK CONTROL CHANNEL - Embodiments of the present disclosure describe devices, methods, computer-readable media and systems configurations for uplink transmit power control for transmitting periodic channel state information. Other embodiments may be described and claimed. | 01-30-2014 |
20140036876 | HIGH EFFICIENCY DISTRIBUTED DEVICE-TO-DEVICE (D2D) CHANNEL ACCESS - Techniques for facilitating device-to-device (D2D) communications using a high efficiency distributed channel access scheme are generally described herein. In some examples, a communication zone allocated for wireless D2D communications is divided into resource contention and scheduled transmission portions. The resource contention segment may be used to transmit a request message from a transmitting device to a receiving device (a request-to-send message), and transmit a response to the request message from the receiving device to the transmitting device (a clear-to-send message). The response can indicate a time for the data transmission to occur during the scheduled transmission segment. During the scheduled transmission segment, the scheduled data transmission and other D2D data transmissions among the various devices will be performed. In further examples, contention access techniques may be used during the resource contention segment to manage access to the resource channel. | 02-06-2014 |
20140044070 | ENHANCED NODE B AND METHOD OF TRANSMITTING PHYSICAL-DOWNLINK CONTROL CHANNELS (PDCCHS) IN A LTE-A SYSTEM - Embodiments of an eNB and method of transmitting PDCCHs are generally described herein. In some embodiments, the eNB may be configured to transmit PDCCHs that are based on a UE-specific reference signal (i.e., a UE-RS). In these embodiments, the UEs may be able to demodulate their PDCCH using a demodulation reference signal (DM-RS) that is specific to the UE (e.g., instead of a common reference signal). The PDCCHs disclosed herein may be suitable the Uu interface of an LTE-A system. | 02-13-2014 |
20140056279 | MAPPING AN ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL - Technology for mapping an enhanced physical downlink control channel to physical resource blocks in a radio frame is disclosed. One method comprises mapping modulated symbols in the ePDCCH to at least one control channel element. The at least one control channel element may be mapped to resource elements located in a plurality of distributed physical resource blocks in a subframe, wherein each resource block is in a distributed resource block group and is separated by at least one additional resource block in the subframe. The mapping may also be to resource elements distributed in a single resource block in the subframe, wherein the control channel element is mapped to be distributed in frequency and time relative to other mapped resource elements in the single resource block and the single resource block belongs to a localized resource block group. | 02-27-2014 |
20140072068 | ENHANCED PERFORMANCE MULTI-USER MULTIPLE INPUT OUTPUT (MU-MIMO) RADIO LINKS - Technology is described for enhancing performance of multi-user multiple input multiple output (MU-MIMO) radio links. A system can include a scrambling module to scramble coded bits in codewords to be transmitted in a transmission. A modulation mapper can modulate the scrambled coded bits to generate modulation symbols in the transmission. A precoding module can precode modulation symbols for the transmission. A feedback module using a codebook with an increased number of codewords can be used to reduce a channel state information (CSI) quantization error in a transmission from a plurality of antennas coupled to the precoding module and configured to transmit the precoded transmission to multiple users. | 03-13-2014 |
20140092821 | DETERMINATION OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL CANDIDATES IN A WIRELESS COMMUNICATION NETWORK - In embodiments, an evolved Node B (eNB) of a wireless communication network may configure an enhanced physical downlink control channel (EPDCCH) physical resource block (PRB) set for a user equipment (UE). The EPDCCH-PRB set may include a plurality of PRB-pairs. The EPDCCH-PRB set may further include a plurality of enhanced resource element groups (EREGs) organized into localized enhanced control channel elements (ECCEs) having EREGs of the same PRB-pair and distributed ECCEs having EREGs of different PRB-pairs. In some embodiments, the eNB may determine a set of distributed EPDCCH candidates for the UE from the EPDCCH-PRB set, wherein the individual distributed EPDCCH candidates include one or more of the distributed ECCEs, and wherein the set of distributed EPDCCH candidates includes at least one EREG from each of the plurality of localized ECCEs. Other embodiments may be described and claimed. | 04-03-2014 |
20140092829 | SYSTEMS AND METHODS FOR SEMI-PERSISTENT SCHEDULING OF WIRELESS COMMUNICATIONS - Methods, systems, and devices for transmission and reception of SPS communications are disclosed herein. User equipment (UE) is configured to receive, in a first subframe, a physical downlink control channel or enhanced physical downlink control channel (PDCCH/EPDCCH) corresponding to semi-persistent scheduling (SPS) activation. The PDCCH/EPDCCH conveys a value of nSCID. The UE configures, based on the SPS activation, a downlink (DL) assignment in a second subframe for receiving an SPS physical downlink shared channel (PDSCH) without a corresponding PDCCH/EPDCCH. The UE determines a reference signal sequence corresponding to the SPS PDSCH using n | 04-03-2014 |
20140092830 | BLIND DECODING FOR AN ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (EPDCCH) - Technology for blind decoding downlink control information (DCI) from an enhanced physical downlink control channel (EPDCCH) is disclosed. In an example, a user equipment (UE) can include a processor configured to: Recursively attempt to decode the DCI from enhanced control channel elements (ECCE) of the EPDCCH from physical resource block (PRB) region candidates in a PRB set using a selected set of enhanced resource element group (EREG) index maps for the ECCE until the DCI is successfully decoded; and decode the DCI with an EREG index map associated with a same aggregation level used to encode the DCI. Each EREG index map can be configured for a different aggregation level (AL). | 04-03-2014 |
20140105109 | Joint Transmission in a Wireless Network - A system for receiving joint transmission wireless signals may include a transceiver to receive a plurality of colliding wireless signals. One of the wireless signals may include reference signal data while another of the wireless signals may include user data. The reference signal data may be combined with the user data into a superimposed signal. The reference signal data may be filtered out from the superimposed data, and the user data may be decoded. | 04-17-2014 |
20140112406 | TECHNOLOGY FOR CSI FEEDBACK IN A MIMO COMMUNICATION SYSTEM - Technology for channel state information (CSI) feedback in a multiple-input multiple-output (MIMO) communication system is disclosed. A method comprises receiving, at a mobile device, a dynamic channel state information (CSI) feedback switch signal from a transmission station that identifies a selected CSI feedback state for the mobile device. A process for selecting a precoding matrix indicator (PMI) and a rank indicator is identified based on the CSI feedback switch signal as either a process configured for MU-MIMO reception or single-user (SU) MIMO reception of a downlink signal at the mobile device. | 04-24-2014 |
20140126487 | MAPPING AN ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL - Technology for mapping an enhanced physical downlink control channel to physical resource blocks in a radio frame is disclosed. One method comprises mapping modulated symbols in the ePDCCH to at least one control channel element. The at least one control channel element can be mapped to resource elements located in a plurality of distributed physical resource blocks in a subframe, wherein each resource block is separated by at least one additional resource block in the subframe. The mapping can also be to resource elements distributed in a single resource block in the subframe, wherein the control channel element is mapped to be distributed in frequency and time relative to other mapped resource elements in the single resource block. | 05-08-2014 |
20140133445 | ENHANCED NODE B AND METHOD FOR PRECODING WITH REDUCED QUANTIZATION ERROR - Embodiments of an enhanced Node B (eNB) and method for precoding with reduced quantization error are generally described herein. In some embodiments, first and second precoding-matrix indicator (PMI) reports may be received on an uplink channel and a single subband precoder matrix may be interpolated from precoding matrices indicated by both the PMI reports. Symbols for multiple-input multiple output (MIMO) beamforming may be precoded using the interpolated precoder matrix computed for single subband for a multiple user (MU)-MIMO downlink orthogonal frequency division multiple access (OFDMA) transmission. In some embodiments, each of the first and second PMI reports includes a PMI associated with a same subband that jointly describes a recommended precoder. | 05-15-2014 |
20140146752 | LAYER SHIFTING IN OPEN LOOP MULTIPLE-INPUT, MULTIPLE-OUTPUT COMMUNICATIONS - Embodiments of the present disclosure describe methods, apparatuses, and systems related to use of interphase/quadrature component layer shifting in open loop multiple-input, multiple-output communications. Other embodiments may be described and/or claimed. | 05-29-2014 |
20140177541 | PDSCH RESOURCE ELEMENT MAPPING FOR THREE-CELL JOINT TRANSMISSION - A PDSCH resource element mapping method is used for joint transmissions. The method solves a problem of colliding resource elements in joint transmissions, due to interference caused when PDSCH resource elements are transmitted in the resource block of one cell and cell-specific reference signals (CRSs) are transmitted in the same location of the resource block of an adjacent cell. The method is particularly beneficial for coordinated multipoint (CoMP) transmissions. The PDSCH resource element mapping method employs one of three schemes for transmitting the collided resource elements, with minimal interference. In the first scheme, one PDSCH symbol is transmitted over three consecutive CRS-collided PDSCH resource elements. In the second scheme, two PDSCH symbols are transmitted over three consecutive CRS-collided PDSCH resource elements. In a third scheme, CRS-collided resource elements are transmitted using a lower modulation order than is specified by the modulation and coding scheme. | 06-26-2014 |
20140247860 | CODEBOOK AND CODEBOOK SEARCH - Briefly, in accordance with one or more embodiments, a codebook used to provide a precoding matrix indicator and/or channel state information comprises one or more rank-1 codewords and at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords, and one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords. Further, the rank-1 codewords may include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for a cross polarize array of antennas if the array of antennas is cross polarized. The codebook may be utilized for single-user multiple-input, multiple-output (SU-MIMO) or multi-user multiple-input, multiple-output (MU-MIMO). | 09-04-2014 |
20140254567 | CARRIER TYPE (NCT) INFORMATION EMBEDDED IN SYNCHRONIZATION SIGNAL - A Second Synchronous Signal (SSS) for a 3GPP LTE downlink signal is generated in such a way that a legacy User Equipment (UE) can determine whether the downlink signal comprises a legacy downlink signal or a New Carrier Type (NCT) downlink signal, which is unavailable to a legacy UE. One exemplary embodiment provides that a first binary sequence and a second binary sequence are generated in which the first and second binary sequences are part of the SSS for the downlink signal. The first binary sequence is multiplied by a first scrambling sequence, and the second binary sequence by a second scrambling sequence in which the first and second scrambling sequences are selected to indicate that the downlink signal is a new carrier type downlink signal. Other exemplary embodiments provide that an order of the first and second scrambling sequences indicates whether the downlink signal is a NCT downlink signal. | 09-11-2014 |
20140348077 | CONTROL CHANNEL DESIGN FOR NEW CARRIER TYPE (NCT) - Technology for allocating at least one physical resource block (PRB) for an Enhanced Physical Hybrid-ARQ Indicator Channel (EPHICH) transmission for a New Carrier Type (NCT) is disclosed. In one method, a number of bits associated with channel coding for an acknowledgement (ACK) or negative acknowledgement (NACK) in the EPHICH transmission is determined. A plurality of modulation symbols for each ACK or NACK in the EPHICH transmission is generated based in part on the number of bits associated with the ACK or NACK. The plurality of modulation symbols are mapped as EPHICH quadrants in one or more resource element blocks (REGs), wherein the EPHICH quadrants are mapped to a plurality of physical resource blocks (PRBs) allocated for EPHICH to increase frequency diversity gain. | 11-27-2014 |
20140355529 | SYSTEM AND METHOD OF MANAGING WIRELESS COMMUNICATIONS WITH MULTIPLE TRANSMISSION POINTS - An apparatus includes a processor a channel state information (CSI) module operative on the processor to evaluate channel state information for a multiplicity of transmission points and to allocate a selection of channel state information reference signals (CSI-RS) to an uplink sub-frame allotted for transmitting channel quality/precoding matrix index/rank indicator (CQI/PMI/RI) information to a transmission point. The apparatus may further include a wireless transceiver operative to transmit the selection of CSI-RS in the uplink sub-frame to the transmission point in a wireless network, and receive information from the transmission point in response to the CSI-RS and a digital display operative to present the information received from the transmission point. | 12-04-2014 |
20140355531 | ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL SCRAMBLING AND DEMODULATION REFERENCE SIGNAL SEQUENCE GENERATION - Methods, apparatuses, and systems are described to provide enhanced physical downlink control channel scrambling and demodulation reference signal sequence generation. | 12-04-2014 |
20140355705 | USER EQUIPMENT AND METHODS FOR CODEBOOK SUBSAMPLING FOR ENHANCED 4TX CODEBOOKS - Embodiments of user equipment (UE) and methods for codebook subsampling for enhanced 4TX codebooks in 3GPP LTE wireless networks are generally described herein. In some embodiments, a physical uplink control channel (PUCCH) is configured for transmission of channel state information (CSI) feedback including a rank indicator (RI) and a precoding matrix (W1). The rank indicator (RI) and a precoding matrix (W1) are jointly encoded and codebook subsampling is performed for the enhanced 4Tx codebook for at least one of: PUCCH report type 5 (RI/1st PMI) in PUCCH 1-1 submode 1; PUCCH report type 2c (CQI/1st PMI/2nd PMI) in PUCCH 1-1 submode 2; and PUCCH report type 1a (subband CQI/2nd PMI) in PUCCH 2-1. | 12-04-2014 |
20150016311 | PHYSICAL UPLINK CONTROL CHANNEL (PUCCH) RESOURCE ALLOCATION (RA) FOR A HYBRID AUTOMATIC RETRANSMISSION RE-QUEST-ACKNOWLEDGE (HARQ-ACK) TRANSMISSION - Technology to provide conditional physical uplink control channel (PUCCH) resource allocation in time division duplex (TDD) for a hybrid automatic retransmission request-acknowledge (HARQ-ACK) transmission in a subframe n is disclosed. In an example, a user equipment (UE) can include computer circuitry configured to: Receive a downlink control channel within a prior specified subframe, wherein the prior specified subframe occurs in time before the subframe n; recognize a downlink control channel type received within the prior specified subframe is a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH); determine a PUCCH resource for the HARQ-ACK transmission using a lowest control channel element (CCE) index of the PDCCH when the received downlink control channel type is the PDCCH; and determine the PUCCH resource for the HARQ-ACK transmission using a lowest enhanced CCE (ECCE) index of the EPDCCH when the received downlink control channel type is the EPDCCH. | 01-15-2015 |
20150029875 | DOWNTILT SELECTION IN A FULL DIMENSIONAL MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM - A technology for an enhanced node B (eNode B) in a cellular network that is operable to determine downtilt using full dimensional (FD) multiple-input multiple-output (MIMO). A plurality of orthogonal frequency division multiple access (OFDMA) signals can be transmitted, wherein each transmitted OFDMA signal is transmitted with a selected downtilt angle from a two dimensional antenna array of the eNode B. Reference signal received power (RSRP) feedback information can be received from a UE for each of transmitted OFDMA signals at the selected downtilt angles. Received signal strength indicator (RSSI) feedback information can be received from the UE. A reference signal received quality (RSRQ) can be calculated for each of the selected antennas angles using the RSRP feedback information and the RSSI feedback information. A downtilt angle can be selected for transmitting data from the eNode B with a highest signal to interference plus noise ratio (SINR). | 01-29-2015 |
20150029919 | TECHNIQUES FOR EFFICIENT SMALL CELL DISCOVERY - Techniques for efficient small cell discovery are described. In one embodiment, for example, an evolved node B (eNB) may comprise logic, at least a portion of which is in hardware, the logic to determine a discovery signal transmission schedule for a series of radio frames based on a discovery signal muting pattern specifying at least one discovery-muted radio frame among the series of radio frames, and a transceiver to transmit at least one primary synchronization signal (PSS) and at least one secondary synchronization signal (SSS) during the series of radio frames according to the discovery signal transmission schedule. Other embodiments are described and claimed. | 01-29-2015 |
20150055454 | USER EQUIPMENT AND METHOD FOR ENHANCED UPLINK POWER CONTROL - Embodiments of user equipment and methods for improved uplink transmission power management and scheduling, are generally described herein. For example, in an aspect, a method of uplink power management is presented, the method includes determining whether a total desired transmission power exceeds a total configured maximum output power for a subframe. When the total desired transmission power exceeds the total configured maximum output power, the method includes allocating a minimum proactive power limitation to each serving cell, assigning a remaining power to one or more channels based on priority, and computing a total power assignment based on the allocating and the assigning. | 02-26-2015 |
20150085722 | PHYSICAL UPLINK CONTROL CHANNEL (PUCCH) RESOURCE ALLOCATION (RA) FOR A HYBRID AUTOMATIC RETRANSMISSION RE-QUEST-ACKNOWLEDGE (HARQ-ACK)TRANSMISSION - Technology to provide physical uplink control channel (PUCCH) resource allocation in time division duplex (TDD) for a hybrid automatic retransmission request-acknowledge (HARQ-ACK) transmission in a subframe n is disclosed. In an example, a user equipment (UE) can include first circuitry configured to detect a downlink control channel within a prior specified subframe that is received in time before the subframe n. The UE can include second circuitry configured to: determine that the downlink control channel detected within the prior specified subframe is one of a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH); and determine one of a legacy PUCCH resource for the HARQ-ACK transmission when the downlink control channel detected within the prior specified subframe is the PDCCH or an enhanced PUCCH resource for the HARQ-ACK transmission when the downlink control channel detected within the prior specified subframe is the EPDCCH. | 03-26-2015 |
Patent application number | Description | Published |
20090177780 | Method and apparatus for data processing - According to the present invention, a method and apparatus for data processing is provided for a data processing device comprising an auxiliary execution system, a main execution system, a switch unit and a networking unit. The method and apparatus according to the present invention are capable of establishing a networking data channel between the auxiliary execution system, the switch unit and the networking unit based on a first control instruction for the switch unit; or of establishing a networking data channel between the main execution system, the switch unit and the networking unit based on a second control instruction for the switch unit. In this way, the realization of always online can be guaranteed, and apparently, the user satisfaction can be effectively improved. | 07-09-2009 |
20090177803 | Data output method and apparatus - A data output method and apparatus according to the present invention, which are applicable in a data processing device comprising an output unit, a computer system and an embedded system, generate a control command for enabling an establishment of a channel for outputting data when it is determined that the computer system stays in a non-operating state, establish a data transmission channel between the embedded system and the output unit based on the control command, determine data to be outputted, and transfer the data to be outputted from the embedded system to the output unit through the data transmission channel. In this way, the method and apparatus according to the present invention can ensure that a user need not wait a long time for the computer's start-up, and can carry out an operation on local data for the computer in time, which improves the user satisfaction. | 07-09-2009 |
20090177898 | Computer system and notebook computer, and method for controlling computer system - The present invention provides a computer system, a notebook computer and a method for controlling a computer system. The method comprises steps of: determining current state of the main computer subsystem; turning off the power of the embedded subsystem or enabling the embedded subsystem into a low-power state of the embedded subsystem when the main computer subsystem stays in a power-on state of the main computer subsystem; and enabling the embedded subsystem into an operating state of the embedded subsystem when the main computer subsystem stays in a low-power state or a shut-down state of the main computer subsystem. The computer system comprises: a power supply, a main computer subsystem and an embedded subsystem, wherein the main computer subsystem comprises a state determination module and a state control module for the embedded subsystem. The notebook computer comprises a main board, an embedded subsystem and a power supply, wherein the main board comprises an embedded controller and a power switch controller as well. With the above technical solutions, the power consumption caused by the embedded subsystem is reduced while implementing a preset function in real time. | 07-09-2009 |
20090217071 | DATA PROCESSING DEVICE AND METHOD FOR SWITCHING STATES THEREOF - The present invention provides a data processing device and a method for switching states thereof. The data processing device comprises an operating system and a communication interface for communicating with another data processing device, wherein the communication interface is enabled when the operating system stays in the operating state of the operating system, and the communication interface is disabled when the operating system stays in a low-power-consumption state. The method for switching states comprises the following steps of: detecting whether the communication interface stays in the operating state of the communication interface and generating detection information; determining whether the operating system stays in the operating state of the operating system when the detection information indicates that the communication interface stays in the operating state of the communication interface, and generating determination information; generating a system state holding command when the determination information indicates that the operating system stays in the operating state of the operating system; and controlling the operating system to stay in the operating state of the operating system based on the system state holding command. The present invention can not only secure communication via the data communication interface, but also allow the operating system to handle normally and stably an interrupt, so as to reduce the system power consumption. | 08-27-2009 |
20090323573 | REMOTE WAKE-UP SYSTEM, WWAN MODULE AND TERMINAL - Disclosed are a remote wake up system based on a WWAN module, a WWAN module and a terminal. The system includes a terminal; a WWAN module adapted to receive and/or send information in a wireless manner; and a security control module adapted to perform a security validation on the call information received by the WWAN module when the terminal is in a sleep state, and the security control module is further adapted to generate a wake-up signal and sending the wake-up signal to the terminal in order to wake up it, in the case of passing the security validation. | 12-31-2009 |
20120176746 | Portable Terminal and Control Method Thereof, Portable Device and Control Method Thereof - A portable terminal is provided, which comprises: a master device and a slave device, the master device includes a master detection unit, a master notification unit and a master control unit, and the slave device includes a slave detection unit, a slave notification unit and a slave control unit; the master detection unit and the slave detection unit are used to detect whether the second interface of the slave device is connected to the first interface of the master device, respectively; when the second interface is connected to the first interface, the master notification unit is used to transmit a first notification instruction to the master device, the slave notification unit is used to transmit the first notification instruction to the slave device; and the master control unit and the slave control unit are used to control the first hardware system and the second hardware system to compose a third hardware system, respectively, after the master device and the slave device connect with each other according to the first notification instruction, and the first OS and/or the second OS run(s) on the third hardware system. The master device and the slave device of the portable terminal in the present application may compose a hybrid system architecture to cooperate or separate as two different device to operate individually. | 07-12-2012 |
20120233622 | PORTABLE DEVICE AND TASK PROCESSING METHOD AND APPARATUS THEREFOR - A portable device and a task processing method and apparatus for the portable device are provided. The method comprises the steps of: obtaining task requirement information of a user; determining, from a first system and a second system, an execution system for responding to a system task corresponding to the task requirement information based on a predetermined policy; and transmitting the task requirement information to the execution system such that the execution system can execute the system task based on the task requirement information. With the present invention, it is possible to automatically determine, based on the task requirement information, an execution system for executing a system task corresponding to the task requirement information, such that the user operation can be facilitated. | 09-13-2012 |
20120287042 | PORTABLE TERMINAL AND DISPLAY OUTPUT METHOD THEREOF - A portable terminal and a display output method for the portable terminal are provided. The portable terminal comprises at least a first system and a second system, a display device including a display area shared by the first and second systems, and an input device for controlling movement of a cursor, wherein output data from the first system is displayed on a first part of the display area controlled by the first system, and output data from the second system is displayed on a second part of the display area controlled by the second system. The display output method comprises: acquiring, by the first system, a trigger switching event corresponding to an input operation on the input device when the cursor is located on the first part; controlling, by the first system, the input device to switch to be connected to the second system based on the trigger switching event; and causing the cursor to be displayed on the second part when the input device is connected to the second system. According to the invention, a seamless switching of a display output between display parts of two systems can be accomplished through operations of the cursor, and thereby the switching time for display output may be reduced. | 11-15-2012 |
20140109913 | ADJUSTMENT ASSEMBLY OF RESPIRATORY MASK - An adjustment assembly of a respiratory mask is provided and includes: a forehead fixing device, adapted to fix the respiratory mask on a user's forehead; an adjustment device, comprising a base body and connectors set on the base body, wherein, at least one connector is chosen by a user to be connected with the forehead fixing device according to the user's forehead. | 04-24-2014 |
Patent application number | Description | Published |
20090304292 | ENCODING AND DECODING METHODS, DEVICES IMPLEMENTING SAID METHODS AND BITSTREAM - The invention relates to a method for encoding a plurality of non overlapping blocks in a picture. The method comprises the steps of:
| 12-10-2009 |
20110206356 | METHOD FOR EMBEDDING VIDEO ANNOTATION DATA INTO A CODED VIDEO STREAM AND VIDEO RECORDING DEVICE - The invention concerns a method for embedding video annotation data into a coded video stream. The method comprises the step of—encapsulating said video annotation data into a unit, so-called video annotation unit, of the coded video data stream which format corresponds to at least one format used for sending the associated video data,—inserting an identifiable synchronizing code enabling the identification of said video annotation unit into the video data stream. | 08-25-2011 |
20120268652 | METHOD AND DEVICE FOR CALCULATING BLUR IN VIDEO IMAGES - Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is a great help to accurately evaluate its quality. A method for calculating blur of video images comprises calculating a horizontal blur value, and determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level. If the video images are progressive, also a vertical blur value is calculated, and combined with the horizontal blur value. The next step is normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level. | 10-25-2012 |
20120314952 | METHOD FOR PROCESSING AN IMAGE - A method for processing an image divided into blocks of pixels is disclosed. The method comprises the steps of:
| 12-13-2012 |
20130039420 | METHOD OF PROCESSING AN IMAGE - The invention relates to a method for processing an image divided into blocks of pixels comprising the steps of:
| 02-14-2013 |
20130039594 | METHOD AND DEVICE FOR ENCODING DATA FOR RENDERING AT LEAST ONE IMAGE USING COMPUTER GRAPHICS AND CORRESPONDING METHOD AND DEVICE FOR DECODING - The invention is made in the field of image codec products. More precisely, the invention relates to encoding and decoding of data for image rendering using computer graphics. A method for decoding data for rendering at least one image using computer graphics is proposed, said method comprising decoding a portion of a bit stream, said portion comprising a syntax element and at least one parameter for a parameter based procedural computer graphics generation method for generating said computer graphics, said syntax element indicating that said portion further comprises said at least one parameter. Further, an apparatus for performing said method is proposed. | 02-14-2013 |
20130044224 | METHOD AND APPARATUS FOR ASSESSING QUALITY OF VIDEO STREAM - Objective video quality assessment models at media-layer or at packet-layer are known for estimating audio/video quality of experience. Existing models are not able to provide stable performance. A method for enabling quality assessment of a stream of frames of video data comprises receiving a sequence of packets, generating a set of parameters and inserting said generated set of parameters as side information into said stream of frames, wherein at least one parameter refers to a video slice level. A method for assessing the quality of a stream of frames of video data comprises receiving a sequence of packets, extracting a set of parameters from said sequence of packets and generating an estimated mean opinion score, wherein the video data comprise a slice level and wherein the extracted set of parameters comprises at least one parameter that refers to a video slice level. | 02-21-2013 |
20130100350 | METHOD FOR MEASURING VIDEO QUALITY USING A REFERENCE, AND APPARATUS FOR MEASURING VIDEO QUALITY USING A REFERENCE - The purpose of an objective video quality evaluation is to automatically assess the quality of video sequences in agreement with human quality perception. The invention addresses the effects of the introduction of a temporal dimension by focusing on the temporal evolutions of spatial distortions, since it has been found that a spatial quality variation cannot be evaluated by simple subtraction of the spatial quality of neighbouring frames. An improved method for estimating perceived video quality comprises steps of calculating a first similarity map between adjacent frames of a current sequence, calculating a second similarity map between the corresponding reference frames, and calculating (smg | 04-25-2013 |
20130103365 | METHOD AND APPARATUS FOR DETECTING REPETITIVE STRUCTURES IN 3D MESH MODELS - Discovering repetitive structures in 3D models is a challenging task. A method for detecting repetitive structures in 3D models comprises sampling the 3D model using a current sampling step size, detecting repetitive structures and remaining potions of the model, determining a representative for each of the one or more repetitive structures, and as long as the detecting step yields one or more repetitive structures, reducing the current sampling step size and repeating the steps of sampling and detecting for each detected representative of a detected repetitive structure and for the remaining portions of the model, wherein the reduced sampling step size is used. The described method and device can e.g. be used for 3D model compression, 3D model repairing, or geometry synthesis. | 04-25-2013 |
20130120587 | METHOD AND APPARATUS FOR MEASURING VIDEO QUALITY - The present invention provides a method and corresponding apparatus for measuring the quality of a video sequence. The video sequence is comprised of a plurality of frames, among which one or more consecutive frames are lost. During the displaying of the video sequence, said one or more lost frames are substituted by an immediate preceding frame in the video sequence during a period from the displaying of said immediate preceding frame to that of an immediate subsequent frame of said one or more lost frames. The method comprises: measuring the quality of the video sequence as a function of a first parameter relating to the stability of said immediate preceding frame during said period, a second parameter relating to the continuity between said immediate preceding frame and said immediate subsequent frame, and a third parameter relating to the coherent motions of the video sequence. | 05-16-2013 |
20130235047 | METHOD FOR ANIMATING CHARACTERS, WITH COLLISION AVOIDANCE BASED ON TRACING INFORMATION - A method for determining a moving direction or moving velocity for a character in a group comprises reading tracing information from a cell in a terrain map on which the character is located, determining if collision avoidance is needed, and if a collision avoiding manoeuvre is necessary then updating the tracing information in the current terrain cell. | 09-12-2013 |
20130251045 | METHOD AND DEVICE FOR DETERMINING A MOTION VECTOR FOR A CURRENT BLOCK OF A CURRENT VIDEO FRAME - A method for determining a motion vector for a current video frame block comprises determining the motion vector using full search. Then, a number of further motion vectors is counted which is the number of motion vectors of neighbouring blocks which are similar to each other and the motion vector. Then it is ascertained that the number meets or exceeds a threshold and that the motion vector is not similar to at least one of the counted further motion vectors. A search region is determined using counted motion vectors and searched for a local best match of the current block. The motion vector is changed towards referencing the local best match. The search region only comprises candidates referenced by motion vector candidates similar to a yet further motion vector pointing to a centre of the further search region. Then, the motion vector resembles the motion presumed by the HVS. | 09-26-2013 |
20130265304 | 3D MESH MODEL AND METHOD FOR CREATING THE 3D MESH MODEL - For improving the compression efficiency of 3D model processing, easier discovering of repetitive patterns is required. The invention enables simplified and improved compression of 3D models by using a pattern-instance record table, which provides the pattern-instance relationship for all instances of repetitive patterns within a 3D object. A 3D mesh model comprises data of a first reference 3D mesh model, an electronic pattern-instance record table comprising first and second instance data, wherein the first instance data points to the first reference 3D mesh model and the second instance data points to the first or a further reference 3D mesh model, and an instance record for third instance data of at least one secondary 3D mesh model instance, wherein the third instance data comprise said first and second instance data or references to said first and second instance data. | 10-10-2013 |
20140037223 | METHOD AND DEVICE FOR LOSSY COMPRESS-ENCODING DATA AND CORRESPONDING METHOD AND DEVICE FOR RECONSTRUCTING DATA - The invention proposes modification of quantized coefficients for signalling of a post-processing method. Therefore, it is proposed a method for lossy compress-encoding data comprising at least one of image data and audio data. Said method comprises determining quantized coefficients using a quantization of a discrete cosine transformed residual of a prediction of said data. Said method further comprises modifying said quantized coefficients for minimizing rate-distortion cost wherein distortion is determined using a post-processed reconstruction of the data, the post-processed reconstruction being post-processed according to a post | 02-06-2014 |
20140119460 | METHOD AND DEVICE FOR ASSESSING PACKET DEFECT CAUSED DEGRADATION IN PACKET CODED VIDEO - Because of the encoding, decoding, and/or transmitting characteristic, the blocks affected by packet defect usually gather in a small spatial/temporal area. The viewers perception of each affected block will influence by other affected block in this small area. The invention proposes using processing means for clustering blocks affected by the packet loss into at least one cluster, for using at least one of spatial and temporal characteristics of the at least one cluster for determining a visibility value of the at least one cluster, for classifying the at least one cluster as belonging into one of at least two different class candidates, wherein each class candidate is associated with a different weight; for weighting the determined visibility value with the weight associated with the class of the at least one cluster, and for assessing the degradation of the video using a sum of the weighted visibility value. | 05-01-2014 |
20140126834 | METHOD AND DEVICE FOR PROCESSING OF AN IMAGE - The invention addresses the problem that traditional Total Variation only enforces the horizontal and vertical intensity continuity and thus fails to reconstruct oblique edges well. In an embodiment, Directional Total Variation is defined which supports multiple gradient directions. It first pre-processes the image and determines the direction of edges/texture; Directional TV is calculated based on the gradients along the determined direction and its orthogonal direction. By utilizing adaptive weights to different directions in the regularization, Directional TV is capable of preserving edges independent from their orientation nicely. Thus, Directional TV regularization based image denoising, compression or super resolution tend to obtain better quality. | 05-08-2014 |
20140140612 | USER TERMINAL DEVICE, SERVER DEVICE, SYSTEM AND METHOD FOR ASSESSING QUALITY OF MEDIA DATA - A user terminal device, a server device, a system and a method for assessing quality of media data are described. The user terminal device is used for extracting artefact features from the media data and for communicating the features to the server device which is then used for determining a quality score using the artefacts and an artefact/quality score database accessible by the server device. The score, transmitted to the user terminal device, is presented to a user from which a subjective quality score and a request for re-determination are received which the user terminal device communicates to the server device. This in turn is used for re-determining the quality score and for transmitting back the re-determined quality score wherein the quality score is re-determined using the received artefacts, the received subjective quality score and the artefact/quality score database. | 05-22-2014 |
20140185668 | METHOD FOR ADAPTIVE ENTROPY CODING OF TREE STRUCTURES - In 3D mesh coding, the geometry data is compressed by spatial tree based approaches. Bitstreams that result from the traversal of a tree structure of spatial tree based approaches for encoding 3D mesh models have systematically special redundancies, which is exploited for further improving the mesh model compression. A method for encoding a bitstream comprises steps of defining at least a first and a second symbol group of binary symbols, with S1 being a subset of S2, determining within the bitstream first portions, second portions and third portions, wherein first portions have Th1 or more consecutive S1 symbols and second portions have Th2 or more consecutive S2 symbols, encoding the bitstream, wherein first portions, second portions and third portions are encoded using different codes, and encoding values indicating the boundary positions between the first, second and third portions in the bitstream. | 07-03-2014 |
20140219350 | METHOD AND DEVICE FOR ESTIMATING VIDEO QUALITY ON BITSTREAM LEVEL - A method for estimating video quality on bit-stream level, wherein the video quality refers to a video after error concealment and the method is performed on bit-stream level before said error concealment, comprises extracting and/or calculating a plurality of global condition features from a video bit-stream, extracting and/or calculating a plurality of local effectiveness features at least for a lost MB, calculating a numeric error concealment effectiveness level for each (or at least for each lost) MB by emulating an error concealment method that is used in said error concealment, and providing the calculated error concealment effectiveness level as an estimated visible artifacts level of video quality. | 08-07-2014 |
20140219364 | METHOD AND DEVICE FOR CALCULATING DISTORTION OF A VIDEO BEING AFFECTED BY COMPRESSION ARTIFACTS AND CHANNEL ARTIFACTS - In video quality control and estimation, the joint evaluation of compression artifacts and channel artifacts is a problem. The invention considers the joint perception of both a compression artifact level D | 08-07-2014 |
20140254676 | VIDEO ENCODING AND DECODING BASED ON IMAGE REFINEMENT - A particular implementation forms an initial reconstructed image block from inverse quantization and inverse transform, and further refines the reconstructed image block using pixels from neighboring reconstructed blocks. The image block may be refined using a bilateral filter, whose space parameter and range parameter are adaptive to the quantization parameter. The particular implementation can be used in both encoding and decoding when reconstructing an image block. When used in encoding, the particular implementation can be used jointly with coefficient truncation, where some non-zero transform coefficients are set to zero. The number of remaining non-zero transform coefficients after coefficient truncation may be adaptive to the quantization parameter, the variance of the image block, the number of non-zero transform coefficients of the image block, and the index of the last non-zero transform coefficient in a zigzag scanning order. | 09-11-2014 |
20140254938 | METHODS AND APPARATUS FOR AN ARTIFACT DETECTION SCHEME BASED ON IMAGE CONTENT - Methods and apparatus for artifact detection are provided by the present principles that measure the level of artifacts, such as those caused by temporal concealment of errors due to packet loss, for conditional error concealment. The principles are based on an assumption that sharp edges of video are rarely aligned with macroblock boundaries so video discontinuities are checked throughout the video. The scheme solves the problem of error propagation when temporal concealment of artifacts is used and the high false alarm rates of prior methods. Artifact detection methods are provided for regions of an image, an entire image, or for a video sequence, with error concealment provided conditionally based on the artifact levels. | 09-11-2014 |
20140286441 | VIDEO QUALITY MEASUREMENT - A particular implementation receives a bitstream and derives parameters from the bitstream. The parameters include quantization parameters, content unpredictability parameters, ratios of lost blocks, ratios of propagated blocks, error concealment distances, motion vectors, durations of freezing, and frame rates. Using these parameters, a compression distortion factor, a slicing distortion factor, and a freezing distortion factor are estimated respectively for distortions resulting from video compression, a slicing mode error concealment, and a freezing slicing mode error concealment. The distortion factors are then mapped to a composite video quality score. For applications with limited computational power, the estimation of distortion factors can be simplified. In particular, the compression distortion factor, the slicing distortion factor, and the freezing distortion factor can be predicted from quantization parameters, ratios of lost blocks, and durations of freezing, respectively. | 09-25-2014 |
20140301486 | VIDEO QUALITY ASSESSMENT CONSIDERING SCENE CUT ARTIFACTS - A particular implementation detects scene cut artifacts in a bitstream without reconstructing the video. A scene cut artifact is usually observed in the decoded video (1) when a scene cut picture in the original video is partially received or (2) when a picture refers to a lost scene cut picture in the original video. To detect scene cut artifacts, candidate scene cut pictures are first selected and scene cut artifact detection is then performed on the candidate pictures. When a block is determined to have a scene cut artifact, a lowest quality level is assigned to the block. | 10-09-2014 |
20140301649 | TEXTURE MASKING FOR VIDEO QUALITY MEASUREMENT - A particular implementation decomposes an image into a structure component and a texture component. An edge strength map is calculated for the structure component, and a texture strength map is calculated for the texture component. Using the edge strength and the texture strength, texture masking weights are calculated. The stronger the texture strength is, or the weaker the edge strength is, the more distortion can be tolerated by human eyes, and thus, the smaller the texture masking weight is. The local distortions are then weighted by the texture masking weights to generate an overall distortion level or an overall quality metric. | 10-09-2014 |
20140307103 | DISTORTION/QUALITY MEASUREMENT - Various implementations address distortion and quality measurements. Certain implementations relate to distortions resulting in a freeze-with-skip and/or a freeze-without-skip. In one implementation, a pause term provides an indication of distortion associated with a pause arising from not displaying one or more consecutive pictures that are not to be displayed. A motion term provides an indication of distortion associated with a related change in motion. A combined indicator is based on an addition of the pause term and the motion term. In another particular implementation, a first indicator indicates distortion across one or more types of distortive effects that results from not displaying a first set of pictures. A second indicator indicates corresponding distortion with respect to a second set of pictures. The first indicator and the second indicator are combined in a non-linear manner. | 10-16-2014 |
20140314321 | DISTORTION/QUALITY MEASUREMENT - Various implementations address distortion and quality measurements related to, for example, freeze-with-skip and/or a freeze-without-skip events. In several implementations, information is accessed indicating that a first and second set of one or more consecutive pictures are not to be displayed. A first and second indicator are determined. In one such implementation, the first and second indicators indicate an amount of distortion across one or more types of distortive effects that result from displaying substantially a first, or second, same picture during a display time for the first, or second, set of pictures. The first and second indicators are combined in a non-linear manner. In another such implementation, the distortion is associated with a given type of distortive effect, from among multiple types of distortive effects, and the first and second indicators are combined for the given type of distortive effect. | 10-23-2014 |
20140321558 | VIDEO QUALITY MEASUREMENT CONSIDERING MULTIPLE ARTIFACTS - A particular implementation determines objective distortion levels (d,) respectively for a plurality of artifact types. The objective distortion levels are aligned to ensure that the same distortion level of different types of artifacts corresponds to the same perceived distortion level. The aligned distortion levels (d,′) are sorted to obtain sorted distortion levels (d,″). The sorted distortion levels are then pooled together into an overall distortion level or an overall quality metric. The sorted distortion levels may be pooled using a weighted sum, wherein the weight is larger when the sorted distortion level is greater. | 10-30-2014 |
20140328550 | BLUR MEASUREMENT - An image is partitioned into a foreground area, a background area, and optionally a transitional area. The partitioning may be pre-defined, or it may be based on user inputs and configuration data. The partitioning may also be refined based on an initial partitioning. Blur measures are determined respectively for the partitioned areas. A blur measure for the whole image can then be determined from a weighted average of the blur measures for the partitioned areas. The blur measure for the image can be used in a video quality monitor. | 11-06-2014 |
20140334555 | METHOD AND APPARATUS FOR VIDEO QUALITY MEASUREMENT - Accuracy and efficiency of video quality measurement are major problems to be solved. According to the invention, a method for accurately predicting video quality uses a rational function of the quantization parameter QP, which is corrected by a correction function that depends on content unpredictability CU. Exemplarily, the correction function is a power function of the CU. Both QP and CU can be computed from the video elementary stream, without full decoding the video. This ensures high efficiency. | 11-13-2014 |