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181 results about "Point mapping" patented technology
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Haptic graphical user interface for adjusting mapped texture
ActiveUS20050128210A1Easy to findEasy selectionInput/output for user-computer interactionCathode-ray tube indicatorsGraphicsEnergy minimization
The invention provides techniques for wrapping a two-dimensional texture conformally onto a surface of a three dimensional virtual object within an arbitrarily-shaped, user-defined region. The techniques provide minimum distortion and allow interactive manipulation of the mapped texture. The techniques feature an energy minimization scheme in which distances between points on the surface of the three-dimensional virtual object serve as set lengths for springs connecting points of a planar mesh. The planar mesh is adjusted to minimize spring energy, and then used to define a patch upon which a two-dimensional texture is superimposed. Points on the surface of the virtual object are then mapped to corresponding points of the texture. The invention also features a haptic / graphical user interface element that allows a user to interactively and intuitively adjust texture mapped within the arbitrary, user-defined region.
Owner:3D SYST INC
Operation land parcel automatic identification and area statistics method based on spatial mesh division
ActiveCN104992072ASmall amount of calculationImprove the efficiency of production supervision and managementSpecial data processing applicationsSelf adaptiveComputer science
Owner:江苏北斗卫星应用产业研究院有限公司 +1
Power-line carrier communication apparatus
ActiveUS7023324B2Large attenuation amountCircuit scale increaseModulated carrier system with waveletsTransmission/receiving by adding signal to waveData seriesCarrier signal
The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D / A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A / D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series.
Owner:PANASONIC CORP
Power-line carrier communication apparatus
InactiveUS7498935B2A large amountImprove scaleElectric signal transmission systemsFrequency-division multiplex detailsData seriesData transformation
The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D / A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A / D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series.
Owner:PANASONIC CORP
Calculating soft information from a multi-level modulation signal
ActiveUS8166379B1Reduce complexityLess complexError correction/detection using convolutional codesError correction/detection using multiple parity bitsSymbol mappingNear neighbor
Apparatus and methods are provided for calculating soft information in a multi-level modulation scheme using one or more nearest neighbors. The nearest neighbors correspond to signal points in a signal constellation set nearest to the value of a received signal. The nearest neighbors of a received signal can be found by using a second symbol-to-signal point mapping for the signal constellation set that is different from the mapping actually used by the signal modulator. The second symbol mapping can be used to simplify the discover of nearest neighbors. Once the nearest neighbors are found in the second symbol mapping, the nearest symbols can be translated back into the actual symbol mapping using, for example, table lookup. The nearest neighbors in the actual symbol mapping can then be used to compute soft information in the form of, for example, log-likelihood ratios (LLRs).
Owner:MARVELL ASIA PTE LTD
Encoding device and method and decoding device and method
InactiveUS6765507B2Improve performanceImprove accuracyError correction/detection using convolutional codesOther decoding techniquesData transmissionComputer science
An encoding device in a data transmission / reception system includes a first convolutional encoder that encodes an outer code, an interleaver that permutes input data, a second convolutional encoder that encodes an inner code, and a muti-level modulation mapping circuit that performs signal-point mapping based on eight-phase shift keying. When the encoding device uses the second convolutional encoder having two or more memories, the first convolutional encoder uses, as the outer code, a code with a minimum output distance greater than the maximum input distance at which the minimum-distance inner code is generated.
Owner:SONY CORP
Multi-antenna transmission device, multi-antenna reception device, multi-antenna transmission method, multi-antenna reception method, terminal device, and base station device
InactiveCN101578779ASpatial transmit diversityModulated-carrier systemsBase station identity codeTerminal equipment
Provided is a multi-antenna transmission device (400) which can perform MLD by using a simple configuration of a reception device in a MIMO-AMC system. The multi-antenna transmission device (400) includes common signal point mapping units (401, 402) for mapping data transmitted from different antennas (111, 112) in a MIMO space multiplex transmission, to common signal points shared by respective modulation methods. Thus, the arrangement of baseband signal points obtained by mapping a code word after channel encoding onto an IQ plane can be shared as common signal points shared by modulation methods. Accordingly, the reception device need not prepare a particular circuit for performing MLD calculation in accordance with a combination of the methods for modulating the signals which have been MIMO-space multiplexed. This can reduce the circuit size of the MLD calculation circuit.
Owner:PANASONIC CORP
Ultrahigh resolution panorama speed dome AIO (All-In-One) system
ActiveCN103501409ASolve the contradictions that cannot be obtained at the same timeFast and precise focus positioningTelevision system detailsImage analysisInformation processingSpatial registration
The invention relates to an image information processing technology, and provides an ultrahigh resolution panorama speed dome AIO (All-In-One) system, a video stitching method and a spatial registration method of the ultrahigh resolution panorama speed dome AIO system. A device comprises an engine base element, a panorama stitching video camera comprising multiple cameras, a speed dome, a controller, a shell and a support. The video stitching method comprises the steps of lookup table calculation, stitching line calculation, image fusion and the like. The spatial registration method comprises the steps of establishing a panorama stitching image coordinate system, uniformly dividing a panorama stitching image into a plurality of rectangular regions, sampling, calculating a mapping relation of sampling points and calculating a non-sampling point mapping relation by adopting a bilinear interpolation method. According to the ultrahigh resolution panorama speed dome AIO system, the video stitching method and the spatial registration method, provided by the invention, not only can panorama monitoring be realized, but also a high-resolution monitoring scene can be provided at the same time, and quick and accurate focus location, zoom out and zoom in and quick and stable browsing of an interested target can be realized through registration linkage between a panorama real-time stitching camera and the speed dome.
Owner:NAT UNIV OF DEFENSE TECH +1
Power-line carrier communication apparatus
InactiveUS20060203897A1A large amountImprove scaleTransmission/receiving by adding signal to waveFrequency-division multiplex detailsData seriesCarrier signal
The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D / A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A / D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series.
Owner:PANASONIC CORP
Apparatus and method for retransmitting data in a communication system
InactiveUS20060182199A1Maximize euclidean distancePolarisation/directional diversityAmplitude-modulated carrier systemsSquared euclidean distanceCommunications system
A communication system includes a transmitter and a receiver. If there is information data to transmit to the receiver, the transmitter generates a first transmission frame by signal-mapping the information data according to a first signal point mapping rule, and transmits the first transmission frame to the receiver. Upon receiving from the receiver a notification indicating a failure to normally receive the first transmission frame, the transmitter generates a second transmission frame by signal-mapping the information data according to a second signal point mapping rule preset such that a minimum squared Euclidean distance with the first transmission frame is maximized, and transmits the second frame to the receiver.
Owner:SAMSUNG ELECTRONICS CO LTD
Terminal frequency point mapping and configuring method
InactiveCN103298121ASmall modificationLittle changeWireless communicationBroadcast channelsBroadcast domain
The invention provides a terminal frequency point mapping and configuring method which includes the following steps that a terminal acquires frequency points of a broadcast channel, receives broadcast information at the frequency points of the broadcast channel, and selects a time slot to send Msg1; after receiving the Msg1, a base station selects a frequency point from the selectable frequency points, and generates and sends Msg2 which carries the selected frequency point information; the terminal obtains time frequency resources of the Msg2 according to the mapping relationship of the Msg1 and the Msg2 and receives the Msg2 on the time frequency resources; the terminal sends Msg3 and receives Msg4 at the assigned frequency point of the Msg2.
Owner:POTEVIO INFORMATION TECH
Color gamut mapping method and color gamut mapping device
InactiveCN107888893ARaise level of detailChromatic Aberration OptimizationTelevision system detailsImage analysisGamutLevel of detail
The invention provides a color gamut mapping method and a color gamut mapping device. The method comprises the following steps: obtaining a Lab values of a color point in an original color gamut, determining a coordinate position of the color point in a tone plane corresponding to the original color gamut according to the Lab value, and judging a color point mapping target area according to the coordinate position; judging whether the color point is beyond the mapping target area according to the coordinate position; if the color point is beyond the mapping target area, determining a first cross point of a connecting line of the color point and a maximum luminance midpoint with a boundary line of the mapping target area, and a second cross point of the boundary line of the mapping target area corresponding to the color point; and finally determining a mapping point of the color point on the boundary line of the mapping target area according to preset adjustment parameters. By means ofthe manner, the uniformity and detail level problems of the mapping on the boundary color point are improved. In addition, the minimum chromatic aberration change, the minimum luminance change and theoptimal minimum color change can also be achieved by modifying the adjustment parameters.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Perimeter alarm method based on two-dimensional laser radar and video analysis
ActiveCN105389920AImprove detection accuracyReduce false positivesClosed circuit television systemsBurglar alarmHat matrixRadar
The invention provides a perimeter alarm method based on a two-dimensional laser radar and video analysis. The perimeter alarm method comprises the steps of acquiring a monitoring video image in a target region, performing corresponding point mapping with a three-dimensional model of the target region, and calculating a perspective projection matrix M; extracting a plurality of moving targets of the monitoring video image, obtaining two-dimensional coordinates, calculating corresponding three-dimensional coordinates to the moving targets, and determining whether the three-dimensional coordinate of each moving target satisfies a preset video alarm rule; using a two-dimensional laser radar for laser scanning of the target region, determining that a preset radar alarm rule is satisfied when the moving targets intersect with a laser scanning surface, and converting radar alarm information corresponding to the moving targets into a three-dimensional coordinate; and comparing the video alarm three-dimensional coordinate and the radar alarm three-dimensional coordinate, and sending out an alarm signal if the two are consistent. The invention can be used for intrusion alarm of abnormal moving targets in a perimeter defense region through bi-directional examination of video analysis results and radar alarm detection results.
Owner:BEIJING ZHENGAN RONGHAN TECH
Encoding modulating method and demodulation modulating method
ActiveCN102316072AImprove transmission performanceImprove performanceError preventionMultiple carrier systemsDecoding methodsTheoretical computer science
The invention discloses an encoding modulating method. In a modulating process, regular constellation mapping or irregular constellation mapping is carried out on bit data, so as to obtain a constellation mapping symbol, wherein the regular constellation mapping means that the mapping from a bit to a symbol is completed by adopting one constellation diagram and one constellation point mapping way, and the irregular constellation mapping means that the mapping from the bit to the symbol is completed by adopting one constellation diagram and more than one constellation point mapping ways. The invention further discloses a demodulation decoding method corresponding to the encoding demodulating method. In the invention, through using regular APSK (amplitude phase shift keying) constellation mapping at a sending end, the shaping loss can be obviously reduced, or by using irregular QAM (quadrature amplitude modulation) constellation mapping, the decoding and the de-mapping are matched more,so as to improve the transmission capability of an encoding modulating system, and through adopting iterative de-mapping at a receiving end, the loss brought by independent de-mapping can be effectively reduced, so as to obviously improve the performance of the encoding modulating system based on the iterative de-mapping.
Owner:TSINGHUA UNIV
Three-dimensional orthogonal frequency-division multiplexing data modulation method and data demodulation method
ActiveCN104639254ASave time and efficiencyTime and efficiency are not affectedMulti-frequency code systemsElectromagnetic transmissionConstellationVIT signals
The invention relates to the field of optical fiber communication, discloses a three-dimensional orthogonal frequency-division multiplexing data modulation method and a data demodulation method, and aims to solve the technical problem of incapability of lowering signal PAPR (Peak to Average Power Ratio) under the condition of not influencing other performances of a system in the prior art. The method comprises the following specific steps: performing three-dimensional data constellation points mapping on a bit sequence to be transmitted to obtain an orthogonal frequency-division multiplexing (OFDM) signal based on three-dimensional mapping; performing three-path overlapping on the real parts and imaginary parts of a plurality of time domain signals obtained after performing three-dimensional inverse discrete Fourier transform (3D-IDFT) on a three-dimensional OFDM symbol respectively through a three-dimensional CAP orthogonal filter, and combining to obtain final transmission time domain data; acquiring data to be transmitted through the time domain signal of a 3D-CAP-OFDM system and transmitting the data to be transmitted. By adopting the methods, the technical effect of effectively lowering the signal PAPR under the condition of no influencing the other performance of the communication system is achieved.
Owner:HUAZHONG UNIV OF SCI & TECH
POI retrieving and ordering method, device and computer readable storage medium
PendingCN108763522ASmall amount of calculationRealize precise searchSpecial data processing applicationsLongitudeGeolocation
The invention provides a POI retrieving and ordering method, a device and a computer readable storage medium. The method comprises the steps that a POI retrieving request of a user is received, wherein the POI retrieving request comprises a location base point, the retrieving area range and target POI attributes; dimension reduction processing is conducted on longitude and latitude data of the location base point by means of GeoHash coding to obtain coded data of the location base point; the location base point is mapped into a coding unit corresponding to the coded data, and the retrieving code range corresponding to the retrieving area range is determined; POI retrieving is conducted in the retrieving code range by taking the target POI attributes as the retrieving conditions to obtain atarget POI set; the distances between various target POIs and the location base point are calculated, and the target POIs are ordered according to the distance from near to far; and an ordering result of the target POIs is displayed to the user. According to the method, precise retrieving on the POIs is completed by utilizing the mapping relation between geographical locations and GeoHash coded data and combining the POI attribute information, and the calculation amount needed in the POI retrieving and ordering process is decreased.
Owner:KANG JIAN INFORMATION TECH (SHENZHEN) CO LTD
Three-dimensional perspective transforming method of two-dimensional graphics
ActiveCN103077546AUnified Manufacturing EfficiencyUniform Manufacturing QualityAnimation3D-image renderingGraphicsAlgorithm
The invention discloses a three-dimensional perspective transforming method of two-dimensional graphics, which comprises the following steps of: skeleton drawing; node mapping: mapping nodes on a two-dimensional molding graphic onto a skeleton according to the corresponding relation between the two-dimensional molding graphic and the skeleton as well as distances and orientation; skeleton adjustment: carrying out the three-shaft rotation of the skeleton by respectively passing around a rotating point and a rotating shaft, and carrying out three-dimensional adjustment; node back-projection: back-projecting the nodes into a three-dimensional space according to the orientation parameters of the nodes projected onto the skeleton by adopting a reverse calculating method, so as to obtain an adjusted three-dimensional modeling graphic object; and projection mapping of a three-dimensional modeling graphic: projecting the three-dimensional molding graphic of the three-dimensional space onto an appointed plane according to the position of a view point to obtain a two-dimensional perspective effect graphic. Through the mode, by adopting the three-dimensional perspective transforming method of the two-dimensional graphics provided by the invention, the efficiency of perspective adjustment in the producing process of two-dimensional cartoons is effectively improved, and the quality of the cartoons is effectively ensured while the cost is saved.
Owner:JIANGSU RUYITOON ANIMATION INDUSTRY CO LTD
Soft tissue surface deformation tracking method based on sub-blocks
ActiveCN105310776AGood tracking effectCorrection of deformationImage analysisDiagnosticsSoft tissue deformationLaser scanning
The invention belongs to the field of medical image treatment and application, and relates to a soft tissue surface deformation tracking method. The method comprises a soft tissue division algorithm and comprises the following steps: carrying out grid processing on an extracted target tissue to obtain an initial soft tissue surface point set; acquiring a deformed soft tissue surface point set by a three-dimensional laser scanning instrument or intraoperative three-dimensional imaging equipment; carrying out crude registration on a deformed soft tissue surface and an initial soft tissue surface by a rigid registration method; and finally acquiring a point-to-point mapping relation of the two point sets on the basis of a sub-block type energy function minimum non-rigid registration algorithm. The method is easy to implement and reliable in precision, and can be integrated in an existing navigation system, intraoperative soft tissue deformation correction is implemented, so that the precision of the navigation system is improved greatly, and clinical application is facilitated.
Owner:FUDAN UNIV
Digital signal transmitting device and receiving device as well as digital signal modulation method and demodulation method
ActiveCN103428158AIncrease flexibilityReduce complexityMultiple carrier systemsComputer moduleError correcting
The invention discloses a digital signal transmitting device and a digital signal receiving device as well as a digital signal modulation method and a digital signal demodulation method. The digital signal transmitting device and the digital signal receiving device of the invention are characterized in that the digital signal transmitting device and the digital signal receiving device comprise a plurality of constellation point mapping modules and a plurality of constellation point de-mapping modules respectively; and different QAM mapping is adopted between each mapping module and each de-mapping module. The digital signal modulation method and the digital signal demodulation method of the invention are characterized in that one code stream is divided into a plurality of sub code streams which are subjected to mapping, and correspondingly, one baseband symbol stream is divided into a plurality of symbol streams which are subjected to de-mapping. With the digital signal transmitting device and receiving device as well as the digital signal modulation method and demodulation method of the invention adopted, according to problems such as too many error-correcting code modes and performance loss of modulation modes such as 32QAM and 128QAM, the flexibility of code rate and receiving threshold can be realized through the modulation modes of hybrid constellation points, and therefore, the complexity of a system can be decreased, and performance can be improved.
Owner:SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
Method and apparatus for gaze point mapping
Owner:APPLE INC
Road sign identification method and device, medium and terminal
The embodiment of the invention discloses a road sign recognition method and device, a medium and a terminal, and the method can comprise the steps: obtaining a three-dimensional point cloud data setwhich comprises a plurality of three-dimensional point cloud data points obtained through the detection of a road; mapping the three-dimensional point cloud data set into a two-dimensional plane image; adopting a machine learning model to identify a road sign in the two-dimensional plane image; and inversely mapping the road sign in the two-dimensional plane image to a three-dimensional coordinateposition. The technical scheme in the embodiment of the invention is higher in accuracy.
Owner:ALIBABA GRP HLDG LTD
Skeleton registration method and system and storage medium
ActiveCN112991409ASurgical precisionImage enhancementImage analysisSingular value decompositionEngineering
The invention provides a skeleton registration method and system for a surgical navigation system and a storage medium, which are used for determining a transformation relation between a preoperative coordinate system and an intra-operative coordinate system, and the method comprises the following steps: obtaining a source point cloud SPC by using preoperative skeleton image data; obtaining a target point cloud TPC by using point data collected from an actual skeleton surface; selecting four groups of corresponding point pairs from the source two point clouds, and performing initial registration; performing accurate registration through different initial transformation matrices, wherein the initial registration is based on an affine transformation method of singular value decomposition, producing a 4 * 4 dimensional matrix, thereby mapping points of the 3D virtual model to an approximation of patient bone coordinates in an intra-operative coordinate system. According to the invention, the anatomical structures of the patient before and during the operation can accurately correspond to each other, so that a doctor can clearly know the anatomical positions of the surgical instrument and the patient, and the surgical tool can be accurately controlled to reach the required part.
Owner:杭州素问九州医疗科技有限公司
Moving object detection method under static background based on watershed segmentation
ActiveCN103093481AGood sealingAvoid voidsImage enhancementImage analysisVideo monitoringComputation complexity
The invention relates to a moving object detection method under a static background based on watershed segmentation. The method includes that a pre-processing over the collected video data is carried out, then, a watershed algorithm of a minimum point is used for carrying out segmentation over the video images. Feature points motion trail in the consecutive frames are obtained through the feature points mapping relations between the consecutive frames, at last, a comprehensive evaluation model is utilized. Seven main influential factors of the feature points track information are taken into consideration comprehensively. By calculating the comprehensive evaluation score of each feature point, the feature points lower than the setting threshold is regarded as a moving object. The moving object detection method under the static background based on watershed segmentation has the advantages of being simple to achieve, low in computation complexity. The moving objects can be judged steadily and accurately, and the moving object detection method under the static background based on watershed segmentation is suitable for a real time high resolution video monitoring system.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Fast matching method and system for remote sensing images
InactiveCN105354841AReduce matchImprove robustnessImage enhancementImage analysisExpectation–maximization algorithmImaging processing
The present invention discloses a fast matching method and system for remote sensing images. The method comprises the following steps of: S1, acquiring a reference image and a to-be-matched image, roughly matching the two images, constructing integral histograms for the two images separately, and determining a candidate matching region according to the similarity of the integral histograms of the to-be-matched image and the reference image; and S2, finely matching the to-be-matched image with the candidate matching region, which comprises the specific steps of: S21, extracting features in the the to-be-matched image and the candidate matching region, and constructing a feature point matching set; S22, constructing formalized expression of a probability expression model and feature point mapping according to the feature point matching set; and S23, eliminating a mismatch according to an expectation-maximization algorithm, calculating a precise matching model, and obtaining a precise matching region of the image by using the precise matching model. According to the fast matching method and system for the remote sensing images, the time of an image processing process is greatly shortened, and the matching precision and the algorithm robustness are improved.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Face key point detection method, device and equipment and storage medium
ActiveCN110807451AImprove accuracyThree-dimensional object recognitionVisual technologyComputer graphics (images)
The embodiment of the invention provides a face key point detection method, device and equipment and a storage medium, and relates to the technical field of artificial intelligence computer vision. The method comprises the following steps: acquiring a three-dimensional face model; projecting the three-dimensional face model from n different visual angles to obtain n two-dimensional face images; detecting corresponding two-dimensional face key points from the n two-dimensional face images; obtaining key point mapping results respectively corresponding to the n two-dimensional face images; and respectively selecting three-dimensional face key points corresponding to the projection view angles from the key point mapping results corresponding to the n two-dimensional face images, and integrating the three-dimensional face key points to obtain a positioning result of the three-dimensional face key points on the three-dimensional face model. According to the technical scheme provided by theembodiment of the invention, the accuracy of detecting the face key points on the three-dimensional face model is improved.
Owner:TENCENT TECH (SHENZHEN) CO LTD
Combined efficiency evaluation method in tactical internet based on node and edge
ActiveCN110061870AWide applicabilityData switching networksArray data structureInformation transmission
The invention relates to a combined efficiency evaluation method in tactical internet based on nodes and edges. The method comprises the following steps: constructing a first combat network topology model according to combat units and information transmission relationships among the units; respectively calculating the node degree of each node and the edge weight between the nodes in the first combat network topology model according to a preset algorithm, and respectively sorting and storing the node degree and the edge weight into a first array and a second array; selecting the edge with the minimum edge weight value in the first combat network topology model and the adjacent edge with the minimum edge weight value in the adjacent edge set, performing edge point exchange according to the affinity coefficient, and deleting invalid edge weights from the second array at the same time; until all nodes of the first combat network topology model are replaced by edges and edge point mapping is completed, obtaining a second combat network topology model; calculating node degrees of all mapping nodes in the second combat network topology model, and sorting and storing the node degrees in athird array; and combining the three arrays to analyze combat countermeasures.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Method for complex layout and wiring compatible with LED display screen
The invention relates to a method for complex layout and wiring compatible with an LED display screen, comprising the steps as follows: technical parameters of an LED unit plate are determined; data polarity of the LED unit plate is detected; blanking polarity of the LED unit plate is detected; the interface color sequence of the LED unit plate is detected; scanning type and returning times of the LED unit plate is detected; offset point of continuous position is continuously sent, practical display position of all offset points is read and point mapping relationship table of the LED unit plate is generated; the point mapping relationship table is sent to the control system of the LED display screen; the control system of the LED display screen memorizes the point mapping relationship table and reads in the memory; when data is required for display, practical address is gained by table look-up and the address is written in the FPGA address space of the control system; the FPGA receives the CPU data of the control system and generates logical display values. The method disengages the tie that the LED display screen factory designs the LED unit plate wiring, further reduces the cost, and is compatible with the wiring of hundreds of screen bodies, more especially with the irregularly random pixel points.
Owner:上海熙讯电子科技有限公司
Device single-event effect weak point mapping screening device and method
ActiveCN110470968AControllable movement accuracyPrecise positioningContactless testingMovement controlMobile location
The invention provides a device single-event effect weak point mapping screening device and method, and the device comprises a host computer control module (11), a single-event flip detection component (13), a tested device loader (14), a three-dimensional mobile platform (15), a controllable pulsed laser emitter (16), a CCD component (17) and an industrial computer component (12), wherein the upper computer control module (11) is configured to send the set moving position interval and test mode parameters to the industrial computer component (12), display and plot according to the fault datacollected by the industrial computer component (12), and obtain the sensitivity and a sensitive area when the tested device has a single-event effect; and the industrial computer component (12) is configured to form a movement control instruction according to the received set parameters, send the instruction to the single-event flip detection component (13) to control the three-dimensional mobileplatform (15), and upload the single-event flip state data and the CCD image to the upper computer control module (11). The invention can perform mapping and discrimination on the physical position and time when the single-event effect of the tested device occurs.
Owner:NAT SPACE SCI CENT CAS
Spherical decoding method
InactiveCN101373975AReduce computational complexityReduce the chance of error propagationCode conversionDiversity/multi-antenna systemsQR decompositionDecoding methods
The invention discloses a sphere decoding method, which comprises the steps of performing sequential decomposition of a channel matrix of a signal to be decoded, determining level number of a search space based on the row number of a matrix R, and determining Fano profile of each level; determining constellation point mapping value and metric value of a received signal on each level by using the elements in the matrix R, searching the search space from the last level of the search space with consideration of the influence of the Fano profile so as to effectively reduce number of searching branches, using the branch with minimum final metric value as a searching result, and using the constellation point mapping value corresponding to the branch to be the sphere decoding result. The inventive technical proposal can effectively reduce computational complexity of sphere decoding, and can balance performance and complexity by adjusting the size of the Fano profile.
Owner:NTT DOCOMO INC
System and method for realizing real-time data point mapping processing based on three-dimensional checking
ActiveCN102799657AReduce capacityReduce error rateSpecial data processing applicationsReal-time dataComputer science
The invention relates to a system and a method for realizing real-time data point mapping processing based on three-dimensional checking, and belongs to the technical field of image data processing. According to the system, firstly coordinates of four peaks of a tetrahedron to which an input point belongs is determined, secondly a corresponding relationship of four one-dimensional checking tables and the peaks of the tetrahedron is determined through a three-dimensional to one-dimensional address mapping module; four one-dimensional checking table modules respectively obtain data (with appointed positions) of the address from an internal storage space according to respective obtained one-dimensional address; and finally an output internal inserting value is calculated by a tetrahedron internal inserting module so as to realize the real-time mapping processing to an image data point. The system and the method provided by the invention are relatively low in error rate and relatively good in performance under the condition of the one-dimensional checking table modules with same capacity; and under the condition of the same error rate, a required one-dimensional checking table module is relatively small in capacity, relatively low in requirements on hardware and relatively small in complexity; and meanwhile, the system and the method have relatively high throughput rate, are convenient in realization mode, low in cost and relatively wid in application range.
Owner:SHANGHAI FULLHAN MICROELECTRONICS
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