Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
189results about How to "Improve decoding success rate" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
One-dimensional barcode decoding chip
ActiveCN101840496ARealize identification and decodingImprove recognition accuracySensing by electromagnetic radiationComputer graphics (images)Barcode
The invention provides a one-dimensional barcode decoding chip which comprises a scanning module, a border identification module, a direction identification module, a bar empty border processing module, a symbol parameter identification module, a symbol and character acquisition module and a decoding module; the scanning module produces scanning coordinates; the border identification module reaches barcode images according to the scanning coordinates and calculates the read image pixels so as to acquire the bar empty border points of the barcode images; the direction identification module calculates and obtains barcode directions according to the bar empty border points acquired by the border identification module; the bar empty border processing module processes the barcode images according to the barcode directions, so as to acquire the bar empty borders in the barcode images; the symbol parameter identification module calculates and acquires symbols and characters according to the bar empty and symbol parameters; and the decoding module converts the symbols and the characters into barcode information. The one-dimensional barcode decoding chip adopts a hardware assembly line structure, is applicable to the assembly line operation and parallel processing of the barcode images, and has high processing speed.
Owner:NEWLAND DIGITAL TECH CO LTD
Light supplementing method in two-dimensional code scanning and system thereof
InactiveCN105138940AImprove decoding success rateImprove environmental adaptabilityTelevision system detailsColor television detailsComputer moduleDimensional modeling
The invention provides a light supplementing method in two-dimensional code scanning and a system thereof. The light supplementing method comprises the steps of S1, starting a camera, recording the current on / off state of a light supplementing lamp; S2, acquiring data of a two-dimensional code image and storing by a processor through the camera; and S3, decoding the two-dimensional code image by the processor, and if decoding fails, changing the on / off state of the light supplementing lamp by the processor, and turning to the step S3 for resuming execution. The system comprises the camera, the light supplementing lamp and the processor. The processor comprises a first recording module, an acquiring module, a storing module, a decoding module and a control module. The camera and the light supplementing lamp are connected with the processor. Through automatically adjusting the on / off state of the light supplementing lamp by the processor, a requirement for determining whether the light supplementing lamp is required according to different environments in which the two-dimensional code is arranged is satisfied. The light supplementing method in two-dimensional code scanning and the system further have advantages of high environment adaptability and flexible and convenient operation.
Owner:FUJIAN LANDI COMML EQUIP CO LTD
Distortion image correction based two-dimensional code decoding method and system
ActiveCN105046184AImprove decoding success rateSmall amount of calculationSensing by electromagnetic radiationCorrection algorithmPerspective transformation
The present invention provides a distortion image correction based two-dimensional code decoding method and a system. The method comprises: acquiring a frame of image that contains a two-dimensional code, and judging the type of the two-dimensional code by determining a plurality of feature points of the two-dimensional code; calling a corresponding matching template according to the type of the two-dimensional code; performing correction by using perspective transformation first, wherein the computation amount of the perspective transformation is small and a quadrilateral pattern with relatively low distortion degree can be realized; filling the matching template with a gray-scale value of each pixel point, wherein rapid decoding is realized by the matching template; if the decoding is failed, then performing correction by starting a curved surface correction algorithm that is relatively complicated and more accurate in correction precision, wherein the curved surface correction can correct a pattern with relatively high distortion degree; performing the perspective transformation on the two-dimensional code pattern subjected to the curved surface correction again for correction. After the curved surface correction, a pattern approximate to a regular quadrangle is obtained and the perspective transformation is performed again, so that the success rate of decoding can be greatly increased.
Owner:FUJIAN NEWLAND AUTO ID TECH CO LTD
Bar code decoding chip of Data Matrix codes and decoding method thereof
ActiveCN101882207AReduce errorsEasy to identifySensing by electromagnetic radiationCode moduleGraphics
Owner:NEWLAND DIGITAL TECH CO LTD
Personnel and vehicle target classification system and method
InactiveCN104519323AImprove processing efficiencyStrong relationshipClosed circuit television systemsSpecial data processing applicationsKey frameByte
The invention relates to a personnel and vehicle target classification system and method. The method comprises the following steps: (1) conducting physical partition on video according to setting byte amount to obtain a plurality of video blocks; (2) saving the partitioned video blocks at different child nodes in sequence; (3) conducting logic slicing on a video block according to the key frame of each video block to obtain a plurality of video slices; (4) analyzing each video slice to obtain a key value pair of the video slice; (5) conducting personnel and vehicle classification on the video slices according to the key value pairs obtained from analysis to obtain personnel target information and vehicle target information; (6) saving the personnel target information and the vehicle target information after classification in different catalogs respectively. Compared with the prior art, the method is easy to operate, efficient in processing, and effective in unziping.
Owner:桂林远望智能通信科技有限公司
Bar space margin processing module, bar code identifying device and method thereof
ActiveCN101908122ARealize identification and decodingImprove recognition accuracySensing by electromagnetic radiationIdentification deviceEngineering
The invention provides a bar space margin processing module and a bar code identifying device using the bar space margin processing module. The bar space margin processing module comprises a scanning margin acquisition unit, a linear scanning unit and a sub-pixel margin calculation unit. The scanning margin acquisition unit is used for acquiring a bar space margin point and a bar code direction and calculating the scanning margin; the linear scanning unit selects a scanning starting point and a scanning destination corresponding to the scanning starting point according to the scanning margin, and calculates the coordinates of the pixel point on the straight line between the scanning starting point and the scanning destination; and the sub-pixel boundary calculation unit is used for calculating the coordinates of the bar space margin according to the coordinates of the pixel point and the grey value of the pixel point. The invention further provides a bar space margin processing method and a bar code identifying method. The bar space margin processing module and the bar code identifying device of the invention can adjust the decoding direction according to the bar code direction, acquire the precise coordinate values of the bar code margin and improve the decoding success rate.
Owner:NEWLAND DIGITAL TECH CO LTD
Decoding method and system for distorted QR (Quick Response) code
ActiveCN105046183AImprove decoding success rateSmall amount of calculationSensing by electromagnetic radiationDistortionCorrection algorithm
The invention discloses a decoding method and system for a distorted QR (Quick Response) code. A frame of image with the QR code is obtained, and the version of the QR code is judged by determining a plurality of feature points of the QR code. A corresponding matched template is called according to the version of the QR code. Correction is implemented by adopting a curved surface correction algorithm with higher correcting precision. A pattern with relatively high distortion degree can be corrected by the curved surface correction. The QR code pattern subjected to the curved surface correction is subjected to perspective transformation for correction. A pattern approximate to a regular quadrangle can be obtained through the curved surface correction, and then the pattern is subjected to the perspective transformation, so that the success rate of decoding can be greatly increased.
Owner:FUJIAN NEWLAND AUTO ID TECH CO LTD
Control information transmitting method and device and control information receiving method and device
ActiveCN108271162AImprove decoding success rateAvoid resource fragmentationNetwork planningTransmission performanceReal-time computing
The embodiment of the invention provides a control information transmitting method and device and a control information receiving method and device. Resource fragmentation can be reduced and the transmission performance can be enhanced. The method comprises the steps that first equipment transmits first control information to second equipment, wherein the first control information includes the information of a first time frequency resource, the first time frequency resource at least bears the first data, and the first data include the first bit obtained by channel coding of the first information block; and the first equipment transmits second control information to the second equipment, wherein the second control information includes the information of a second time frequency resource, thesecond time frequency resource at least bears the second data, the second data include the second bit obtained by channel coding of the first information block, the second time frequency resource ispositioned in the preconfigured first resource area, the first resource area is used for bearing the first business and is not used for bearing the second business, and the first data and the second data belong to the data of the first business.
Owner:HUAWEI TECH CO LTD
Coder, decoder, coding method and decoding method lowering flash bit error rate
ActiveCN107590021AReduce raw bit error rateImprove decoding success rateRead-only memoriesRedundant data error correctionDependabilityRaw bit error rate
The invention discloses a coder, a decoder, a coding method and a decoding method lowering flash bit error rate, belonging to the technical field of flash chip compilation. When the coder writes data,the coder determines whether a half of ''1'' are in written hot data, if yes, the coder inverts hot data and then writes in flash; and the coder determines whether a half of ''1'' in high page data or a half of ''0'' in low page data are in written cold data, if yes, the coder inverts the cold data and then writes in flash. When the decoder reads data, the decoder analyzes an inversion state of the read data, if a half of ''1'' exists in the inversion state, the decoder inverts the read data and then outputs, if not, the decoder directly outputs read data. The invention realizes the coding method and decoding method lowering flash bit error rate. Through adoption of the coder, the decoder, the coding method and decoding method, the error probability of data in flash is lowered, the original bit error rate is lowered, more accurate input is provided for existing correction code solutions, the decoding success rate is improved, so that the flash reliability is further improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Bar code decoding chip
ActiveCN101833641ARealize identification and decodingImprove recognition accuracySensing by electromagnetic radiationProgramming languageCoding decoding
The invention provides a bar code decoding chip which comprises a scanning module, a boundary recognition module, a direction recognition module, a bar space boundary processing module, a symbolic parameter recognition module, a symbolic character acquiring module and a code decoding module. The scanning module is used for producing scanning coordinates; the boundary recognition module is used for reading a bar code image according to the scanning coordinates and calculating read image pixel points to acquire a bar space boundary point of the bar code image; the direction recognition module is used for calculating a bar code direction according to the bar space boundary point acquired by the boundary recognition module; the bar space boundary processing module is used for processing the bar code image according to the bar code direction to acquire a bar space boundary in the bar code image; the symbolic parameter recognition module is used for recognizing a symbolic parameter of the bar code according to the bar code direction to acquire the symbolic parameter; the symbolic character acquiring module is used for calculating a symbolic character according to the bar space boundary and the symbolic parameter; and the code decoding module is used for converting the symbolic character into bar code information. The bar code decoding chip adopts a hardware streamline structure, is suitable for performing assembly line work and parallel processing on the bar code image and has a high processing speed.
Owner:NEWLAND DIGITAL TECH CO LTD
Hybrid automatic repeat request (HARQ) method and base station equipment
InactiveCN101902777AGuaranteed decodingImprove decoding success rateError prevention/detection by using return channelNetwork traffic/resource managementFrequency spectrumNetwork packet
The invention discloses a hybrid automatic repeat request method and base station equipment, which aims at solving the problems of low terminal packet decoding success rate and low system spectrum efficiency in the HARQ process under the condition that the base station does not receive any feedback information that is sent by the terminal and is about whether the HARQ packet is received successfully or not. The method of the invention comprises: the base station utilizes downlink resources assigned for the terminal and adopts an HARQ mode to send a first sub-packet of an HARQ packet; and if the base station does not receive any feedback information which is sent by the terminal and is about whether the HARQ packet is received successfully or not within a set time period, the base station assigns new downlink resources for the terminal and utilizes the newly assigned downlink resources to transmit the first sub-packet of the HARQ packet to the terminal again.
Owner:ZTE CORP
Two-dimensional code area detection positioning method and system
InactiveCN109800615AImprove experienceSolve prone to bull's-eye combination errorsSensing by electromagnetic radiationGraphicsComputer vision
The invention discloses a method and a system for detecting and positioning a two-dimensional code area. During positioning, a gray level image of a to-be-identified two-dimensional code is obtained;downsampling is carried out on the grayscale image; carrying out edge detection on the down-sampled image; and performing binarization processing on the image after edge detection, performing expansion and corrosion processing on the image after binarization to obtain a plurality of connected regions, performing two-dimensional code feature analysis on each connected region, screening out candidate regions of the two-dimensional code, and taking the region of the grayscale image corresponding to the obtained candidate regions as a to-be-decoded region. Through the steps of gray processing, downsampling, edge detection, binarization processing, expansion, corrosion, screening and the like on the image, a plurality of two-dimensional codes are detected and positioned from a complex graph with a plurality of two-dimensional codes, and the problems of two-dimensional code bull eye combination errors and low decoding success rate are avoided.
Owner:NEWLAND DIGITAL TECH CO LTD
Method and system for optimizing pre-decoding set in luby transform codes
InactiveCN101826940AImprove decoding success rateReduce sizeError preventionCode conversionFountain codeExclusive or
The invention discloses a method for optimizing a pre-decoding set in luby transform (LT) codes. The method comprises the following steps that: a sending terminal performs replacement treatment on an originally input coding group of a coding group of which the degree is 2 in front K coding groups generated by the LT codes and transmits the originally input coding groups, wherein k is the number of the selected coding groups; and decoding is carried out at a receiving terminal, if all originally input coding groups are decoded, the decoding is ended, or the receiving terminal performs an exclusive-or treatment on the two decoding groups which cannot be decoded and assigns a value to the next coding group, and the decoding continues till the end. The invention also discloses a system for optimizing the pre-decoding set in the LT codes. The method and system can make the size of the pre-decoding set more stable during the decoding and provide a bigger pre-decoding set.
Owner:ZTE CORP
Data bit extracting method of mode S answering signal in ADS-B system
ActiveCN104253721AAccurate extractionImprove anti-interference abilityError preventionTransmission monitoringFault toleranceQuality data
The invention discloses a data bit extracting method of a mode S answering signal in an ADS-B (automatic dependent surveillance-broadcast) system. The method comprises a Gaussian noise power predicating step, a data bit division step, a data bit quality judging and high-quality data bit extraction step, a common-frequency interference maximum power calculation step, a low-quality data bit extraction step and a CRC error correction step. The data bit extracting method has the advantage that the anti-interference and high-fault-tolerance data bit extraction of the mode S answering signal of the ADS-B system is realized.
Owner:慧科教育科技集团有限公司
PDF417 bar code decoding chip
ActiveCN101908126ARealize identification and decodingImprove recognition accuracySensing by electromagnetic radiationProgramming languageCoding decoding
The invention provides a PDF417 bar code decoding chip which comprises a scanning module, a boundary identification module, a direction identification module, a bar space boundary processing module, a symbolic parameter identification module, a sign character acquisition module and a decoding module, wherein the scanning module is used for generating scanning coordinates; the boundary identification module is used for reading a bar code image according to the scanning coordinates and calculating pixel points of the read image so as to acquire bar space boundary points of the bar code image; the direction identification module is used for calculating a bar code direction according to the bar space boundary points acquired by the boundary identification module; the bar space processing module is used for processing the bar code image according to the bar code direction so as to acquire a bar space boundary of the bar code image; the symbolic parameter identification module is used for identifying the symbolic parameter of a bar code according to the bar space boundary so as to acquire the symbolic parameter; the sign character acquisition module is used for calculating according to the bar space boundary and the symbolic parameter to obtain a sign character; and the decoding module is used for converting the sign character into bar code information. The PDF417 bar code decoding chip adopts a hardware pipeline structure, is suitable for carrying out pipeline operations and parallel processing on bar code images and has high processing speed.
Owner:NEWLAND DIGITAL TECH CO LTD
Data receiving method and device
InactiveCN101286819AImprove reliabilityReduce decoding workloadError preventionCode conversionForward error correctionData transmission
The invention relates to a data receiving method and a device thereof. A data receiving terminal treats all document blocks received as follows: forward error correction decoding is carried out to sequence of Tb bits to be decoded of the document blocks to obtain sequence of Tb information bits decoded with length of K, wherein, a ith sequence of bits to be decoded is composed of every non-abradant information document piece of the document blocks and a ith bit in check document pieces in sequence according to the order of information document pieces and check document pieces; K information document pieces decoded of the document blocks combine to generate original document data of the document blocks, wherein, a mth information document piece decoded is composed of a mth bit in the sequence of Tb information bits decoded in sequence according to the order of information bit sequence. The data transmission method and the corresponding decoding method and device of the invention can greatly decrease decoding work of the receiving terminal and greatly improve the success rate of decoding and reliability of data transmission.
Owner:张利娟
Improved self-defined model three-dimensional two-dimensional code generation method and system facing 3D printing
ActiveCN107145928AIncrease contrastImprove decoding success rateRecord carriers used with machinesCoding blockComputer graphics (images)
The present invention provides an improved self-defined model three-dimensional two-dimensional code generation method and system facing 3D printing. The method comprises: performing meshing and normalization processing of a self-defined model; employing the perspective projection transformation method to map two-dimensional codes to the target area of the self-defined model; performing hollowing operation according to a mapping result, and generating three-dimensional two-dimensional codes with the same hollowing depth at the surface of the self-defined 3D model; simulating a real two-dimensional code image through a physical experiment, and calculating the whole contrast of the three-dimensional two-dimensional codes and the contrast of each black module; optimizing the depth of the three-dimensional two-dimensional code block module according to the simulation result, and generating the three-dimensional two-dimensional codes; inputting the generated 3D model comprising the three-dimensional two-dimensional codes into a 3D printer, employing homogenous materials for printing, and finally outputting a 3D real object with the three-dimensional two-dimensional codes.
Owner:SHANDONG UNIV
Fountain code encoding method based on satellite communication
InactiveCN109510687ASolve the delay problemSolve the signal fadingError prevention/detection by using return channelRadio transmissionFountain codeComputer science
The invention discloses a fountain code encoding method based on satellite communication. The method comprises the following steps of A): segmenting a sent file to form a plurality of original information groups; B): carrying out fountain code encoding on the original information groups so as to form coded groups; C): transmitting the coded groups to a receiving end through a satellite link, and performing fountain code decoding after the receiving end receives sufficient data packets; D): if all the original information groups cannot be recovered, feeding back data block numbers needing to beretransmitted and a quality condition of the satellite link to a sending end; if all the original information groups are recovered, not starting a feedback mechanism; and E): if the sending end receives feedback information, according to the quality condition of the satellite link, adjusting fountain code encoding parameters dynamically in real time, and starting a retransmission mechanism. The method has the advantages that the encoding redundancy overhead is effectively reduced, repeated feedback and retransmission are avoided, and the problems that the error rate is high, the transmissiontime delay is long and the like in satellite communication are solved in a targeted mode.
Owner:NANTONG RES INST FOR ADVANCED COMM TECH CO LTD +1
Label signal decoding method, label decoding device and label reader
ActiveCN107959549AExact searchImprove decoding success rateError preventionNear-field in RFIDFault toleranceFailure causes
The invention relates to the technical field of RFID radio frequency, and mainly relates to a label signal decoding method, a label decoding device and a label reader. The label signal decoding methodcomprises a data sampling step, a frame header detection steps and a data decoding step. In the frame head detection step, a matching degree of a frame head template sequence and a label data signalsequence is measured by using related coefficients, and a frame header is accurately found in a waveform comparison mode; in the data decoding step, data sequences within a bit period are extracted according to a sampling multiplier N and a level skip condition of a data part, and the problem of decoding failure caused by frequency offset of a certain degree can be processed; and the computation amount of determining the data bit according to an accumulated value is small, the judgment result is reliable, and certain fault tolerance is available.
Owner:ZHEJIANG DAHUA TECH CO LTD
One-dimensional barcode decoding chip
ActiveCN101840496BRealize identification and decodingImprove recognition accuracySensing by electromagnetic radiationComputer graphics (images)Barcode
The invention provides a one-dimensional barcode decoding chip which comprises a scanning module, a border identification module, a direction identification module, a bar empty border processing module, a symbol parameter identification module, a symbol and character acquisition module and a decoding module; the scanning module produces scanning coordinates; the border identification module reaches barcode images according to the scanning coordinates and calculates the read image pixels so as to acquire the bar empty border points of the barcode images; the direction identification module calculates and obtains barcode directions according to the bar empty border points acquired by the border identification module; the bar empty border processing module processes the barcode images according to the barcode directions, so as to acquire the bar empty borders in the barcode images; the symbol parameter identification module calculates and acquires symbols and characters according to the bar empty and symbol parameters; and the decoding module converts the symbols and the characters into barcode information. The one-dimensional barcode decoding chip adopts a hardware assembly line structure, is applicable to the assembly line operation and parallel processing of the barcode images, and has high processing speed.
Owner:NEWLAND DIGITAL TECH CO LTD
Method for processing multi-device transparent HARQ
ActiveCN104144044AImplementation instructionsReduce the number of retransmissionsError prevention/detection by using return channelProtocol processingProcess module
The invention relates to a method for processing a multi-device transparent HARQ. The method includes the following steps that a count field of a VC frame in an AOS frame header comprises three bytes, a k bit in the field is used for indicting markers of decoding devices in a transparent HARQ decoding module, and when the serial numbers of AOS frames are determined and data frames arrive at a receiving end, the data frames are submitted to the determined decoding device in the transparent HARQ decoding module to be decoded; when a sender constructs the AOS frames, the serial numbers of the AOS frames are arranged in the count field of the VC frame in a filling mode; when a receiver receives the AOS frames, the corresponding decoding device in the transparent HARQ decoding module is selected according to the value of the k bit in the count field of the VC frame to conduct decoding, the VOS frames are submitted to an ordering module after being decoded successfully through the corresponding decoding device in the transparent HARQ decoding module, the AOS frames are submitted to an AOS protocol processing module in sequence, and AOS protocol receiving processing is conducted on the AOS frames. Under the condition that a frame format is not modified, indication of the multiple transparent HARQ decoding devices is achieved; the decoding efficiency is improved, the decoding success rate is increased, the AOS frame retransmission frequency is reduced, and the throughput of a system is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Internet-of-vehicle long distance data communication relay agent method based on fountain code
ActiveCN107249203ASimplify the coding processImprove decoding success rateError preventionNetwork topologiesData transmissionReal-time computing
The invention discloses an Internet-of-vehicle long distance data communication relay agent method based on a fountain code. The method comprises steps that S1, the fountain code is utilized by a sending end vehicle node to code sending-needing data; S2, a fountain code message is forwarded by a relay node, and a road side unit (RSU) is taken as an agent for fountain coding; S3, foundation coding of the message after successful coding is carried out for another time by an agent node; and S4, a foundation coding message is received by a reception end vehicle node, and foundation coding is further carried out. The method is advantaged in that the coding process is simplified, a coding success rate is further improved, expected forwarding frequency of data transmission is further improved, and data transmission efficiency is improved.
Owner:XIAMEN UNIV
Adaptive weighted HARQ (hybrid automatic repeat request) combination method and device
InactiveCN102594535AImprove decoding success rateProportionally largeError prevention/detection by using return channelAdaptive weightingSelf adaptive
The invention provides an adaptive weighted HARQ (hybrid automatic repeat request) combination method and an adaptive weighted HARQ combination device, relates to the field of communication techniques, and solves the problem that under the condition that the code rate of requested data is higher than the code rate of to-be-decoded data subjected to decoding failure, a receiving end after receiving the requested data is low in success rate of data decoding. The method specially comprises the following steps of: receiving requested data; multiplying the requested data by a combined weight value so as to obtain a product, adding the product and to-be-decoded data subjected to decoding failure together so as to obtain data subjected to adding, and updating the to-be-decoded data into the data subjected to adding, so that the combined weight value is greater than the ratio of the code rate of the requested data to the code rate of the to-be-decoded data subjected to decoding failure; and carrying out decoding on the updated to-be-decoded data. The method and device disclosed by the invention can be applied to adaptive weighted HARQ combination.
Owner:HUAWEI TECH CO LTD
Information processing method and device, communication equipment and communication system
ActiveCN108400844AImprove decoding performanceImprove decoding success rateError prevention/detection by using return channelError correction/detection using multiple parity bitsInformation processingComputer hardware
The application discloses an information processing method and device, communication equipment and a communication system. The communication equipment is used for acquiring the starting position of anoutput bit sequence in an encoding block of cyclic buffer, and determining an output bit sequence from the encoding block based on the length of the output bit sequence and the starting position, wherein the value of the starting position is one of {P<0>, P<1>, P<2>..., P<k<max>-1>}, P<k> is greater than or equal to 0 and smaller than N<CB>, P<k> is an integer, K is an integer, K is greater thanor equal to 0 and smaller than k<max>, N<CB> is the size of the encoding block, and k<max> is an integer being greater than or equal to 4. Through reasonable determination of a bit sequence of initialtransmission or retransmission, the decoding performance of receiving-end communication equipment after reception of the bit sequence is improved; the decoding success rate is increased; and the number of retransmission is further reduced.
Owner:HUAWEI TECH CO LTD
Data transmission method and device
ActiveCN106301714AIncrease sending rateImprove decoding success rateError preventionComputer hardwarePacket loss
The present invention provides a data transmission method and device. The method comprises: a sending terminal performs redundancy encoding of data in a data set to be sent at present according to the redundancy encoding parameters corresponding to the data set to be sent at present; and the sending terminal sends the data in the data set to be sent at present after redundancy encoding to a receiving terminal. The data transmission method and device can reduce the packet loss probability of the sending terminal sending data to the receiving terminal, reduce the probability of repeatedly sending data to the receiving terminal and improve the data sending speed.
Owner:ZHEJIANG DAHUA TECH CO LTD
A two-dimensional code decoding method and a terminal
ActiveCN109902530AIncrease success rateImprove decoding success rateSensing by electromagnetic radiationGray levelCoding decoding
The invention relates to a two-dimensional code decoding method and a terminal, and belongs to the field of data processing. The method comprises the steps of by obtaining a grayscale image of a two-dimensional code, obtaining a gray histogram corresponding to the gray image; Counting a half of the total number of pixels of the grayscale image to obtain a target number; Obtaining a gray thresholdvalue according to a preset formula; Wherein the preset formula is specifically shown in the description; Wherein histGram [i] represents the number of pixels with the gray value of i in the gray histogram, S represents the target number, dif (t) represents the difference between the number of pixels with the gray value of not more than t and the target number, and T represents the gray threshold;Binarizing the gray level image according to the gray level threshold value to obtain a binarized image; And calling a bar code decoding algorithm, and trying to decode the binary image. The two-dimensional code decoding success rate of non-uniform ink jet is improved.
Owner:厦门商集网络科技有限责任公司
One-dimensional bar code word decoding method based on least square method
ActiveCN106874820AImprove decoding success rateRecord carriers used with machinesSensing by electromagnetic radiationComputer hardwareLeast squares
The invention discloses a one-dimensional bar code word decoding method based on the least square method, and the method comprises the following specific steps: calculating the number ei of modules in a similar edge distance of each code word of a bar code according to an actually scanned bar vacancy width, comparing the number ei of modules with the number Ei of module widths in an accurate code word in a standard edge difference table, judging whether the number ei of modules is equal to the number Ei of module widths or not, and calculating the number N when ei is equal to Ei, wherein g is the number of modules in the similar edge distance of the code word; determining that the decoding of the code word is not successful if N is less than g-2 or N is less than or equal to one; searching to-be-selected possible code words Fi if N is greater than or equalt o g-2 or N is greater than 2; selecting the code word with the minimum error Err as the correct code word from all possible code words through the least square method, and carrying out the detection of an error code for the code words; determining that the decoding is successful if the error code detection is passed, or else determining that the decoding is not successful; selecting the possible characters if N is equal to g, and carrying out the related calculation whether the characters are error codes or not. The method can greatly improve the decoding success rate of bar code words.
Owner:HANGZHOU SYNOCHIP DATA SECURITY TECH CO LTD
Communication method for guiding landing assisting of helicopter based on grading fountain codes
ActiveCN104803001ARealize hierarchical protectionImprove efficiencyAircraft landing aidsPacket loss rateBroadcasting
The invention discloses a communication method for guiding landing assisting of a helicopter based on grading fountain codes. The communication method specifically comprises the following steps of 1, after a ground guide person selects a proper landing airport, firstly, fixing four beacons at four corners of a landing mark H, starting the four beacons, and waiting the helicopter; 2, enabling the helicopter to carry a receiving end, and searching an ultraviolet signal which is broadcast and sent by a sending end; 3, enabling a pilot to complete the aligning of the helicopter and the beacons according to the display of the received light intensity indication lamp array; 4, enabling the pilot to finely adjust the gesture of the helicopter in real time according to the information displayed on a liquid crystal screen, so as to complete the safety landing of the helicopter. The communication method has the advantages that by combining the communication strategies for landing assisting of the helicopters with ULC-LT (unequal leveling code - Luby transform) codes in different stages, the decoding success rate of the takeoff and landing assisting communication is improved, the false bit rate is reduced, the reliable communication under the condition of high channel packet loss rate is guaranteed, and the searching, positioning and landing efficiency and safety of the helicopter are improved.
Owner:XIAN UNIV OF TECH
Module for calculating bar space boundary pixel points and calculating method thereof
ActiveCN101833640AImprove decoding success rateSimple structureSensing by electromagnetic radiationCalculation methodsComputer science
Owner:NEWLAND DIGITAL TECH CO LTD
A design method of an original mode diagram LDPC code
InactiveCN109067408AExcellent resistance to burst error performanceImprove decoding success rateError correction/detection using multiple parity bitsCode conversionAlgorithmDesign methods
The invention belongs to the technical field of channel coding, in particular to a design method of an original mode diagram LDPC code. The scheme of the invention utilizes the advantages of flexibleconstruction and convenient analysis of the original module LDPC code, optimizes the PEG algorithm of the original module LDPC code, and constructs a more sparse LDPC code. By adding the constraint conditions of PEG algorithm in removing duplicate edges, that is, adding the constraint to increase the average minimum distance of non-zero elements in the selection of inspection nodes, the burst resistance of PEG algorithm is achieved. The method not only inherits the advantage of traditional PEG algorithm without four rings, but also ensures that the ring length is as large as possible. Throughsuch a design method, the performance of LDPC codes under medium and short codes is improved, and the purpose of anti-burst can be achieved. Finally, in the burst deletion channel, the method of adding interleaving is used to further improve the decoding success rate.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com