80 results about "Long code" patented technology

The present application provides an image encoding and decoding method, device and storage medium, which relates to the field of video encoding and decoding. The encoding method includes: obtaining an encoding unit; the encoding unit is an image block in the image to be processed; the encoding unit includes encoding blocks of multiple channels; the multiple channels include a first channel; the first channel is any one of the multiple channels; the encoding block of the first channel is encoded according to a first encoding mode; the first encoding mode is a mode for encoding sample values ​​in the encoding block of the first channel according to a first fixed-length code; the code length of the first fixed-length code is less than or equal to the image bit width of the image to be processed; the image bit width is used to represent the number of bits required to store each sample in the image to be processed. The method is applicable to the image encoding and decoding process, and is used to solve the problem of too large a substream buffer setting.

The invention belongs to the technical field of communication, and particularly relates to a multiplication active code decoding method based on an SO-ORBGRAND decoder. The SO-ORBGRAND decoder outputs soft information by calculating a correct posterior probability of a conjecture code word sequence, and high-performance decoding is realized through soft information exchange and optimization processing between the row decoder and the column decoder. In the iteration process, a method for judging the validity of the code word through the check matrix is designed by utilizing the polarization characteristic of the multiplication active code, so that the iteration is supported to jump out in advance to reduce the complexity. The invention provides a multiplication active code decoding algorithm based on an SO-ORBGRAND decoder, and compared with various non-system multiplication active code decoding algorithms and the performance of traditional long-code polarization codes, the method has remarkable advantages in error correction performance; a method for judging the validity of the code word through the check matrix by utilizing the polarization characteristic design of the multiplication positive code is provided, the complexity is reduced while the judgment success rate is improved, and the implementation overhead is reduced.

The invention provides a multi-agent-based code conversion system and method. The method comprises the following steps: preprocessing an input source code; performing block processing on the source code to obtain source code blocks, obtaining variable information and array size information of the blocks corresponding to the source code, and integrating the variable information and the array size information into complete variable information; fusing the code description file, the code blocks of the source codes and the variable information of the blocks corresponding to the source codes to generate target code blocks; debugging and checking the target code blocks in combination with the source code blocks; the code description file is used for guiding the intelligent agent to establish a jumping type relation in the code conversion process, and it is ensured that the generated target code better meets the actual function requirement of hardware; a block identifier is inserted into a long code to divide the long code into a plurality of blocks, so that the limitation on long code conversion is relieved; codes of different styles can be output by simply adjusting the cue word of the intelligent agent; through multiple times of debugging verification, the conversion quality of the target code is ensured.

The invention provides a decoding device and method. The method is suitable for the condition that periodic repeated code elements exist in original information code elements. The method comprises the steps that scrambled information code elements k0, k1, k2,..., kt-1, kt,..., km-1 with the length of m, the initial state M (0) of a long code generator and a state transition matrix B are received; constructing auxiliary data k0 ', k1', k2 ',..., k' 82 according to the scrambled information code elements k0, k1, k2,..., kt-1, kt,..., km-1; wherein ki '= ki + kt-1 + i, and i = 0, 1,..., 82; according to the auxiliary data k0 ', k1', k2 ',..., k' 82, the initial state M (0) and the state transition matrix B, a 42 * 42 full-rank matrix D is obtained through calculation; wherein the first behavior of the D is CBn, and then a scrambling code # imgabs0 # with the length of m is obtained through sequential analysis, the scrambling code obtained through analysis and scrambled information code elements k0, k1, k2,..., km-1 are subjected to modulo 2 addition operation, and an original information code element with the length of m is obtained.

The invention discloses a QC-LDPC code check matrix construction method and device, a medium and a product, and relates to the technical field of channel coding, and the method comprises the steps: firstly generating an initial check matrix without four rings; secondly, screening out a target column which is easy to cause decoding oscillation based on pre-decoding, and reducing non-zero items with the maximum number of six rings to generate an intermediate check matrix; and finally, optimizing six-ring distribution of the intermediate matrix column by column, and generating a target check matrix with mixed column weight. In order to solve the problem of decoding error leveling caused by short rings (four rings and six rings) in a QC-LDPC code with high code rate and long code word, the check matrix structure is dynamically optimized through a three-step construction method, the number of harmful short rings in the check matrix is remarkably reduced, the decoding performance is improved, and the error leveling is reduced.

The invention provides a code vulnerability detection method based on meta-learning and multi-modal fusion, belongs to the technical field of computers, and solves the technical problem that the existing vulnerability detection method is low in detection precision of a long code segment and weak in recognition capability under class imbalance. According to the technical scheme, the method comprises the following steps that S1, an original data set is preprocessed, and super-long code samples are screened; s2, simplifying a super-long code by using a large language model, and retaining key vulnerability semantics; s3, constructing AST extraction structure representation, and taking a code and a structure as multi-modal input; s4, code sequences and structural features are extracted through a pre-training model, and fusion is carried out through a cross-modal attention mechanism; s5, simulating a small sample task by adopting a meta-learning strategy to adapt to a class imbalance scene; and S6, inputting test data and outputting a vulnerability classification result. The method has the beneficial effects that the complex code and rare vulnerability detection performance can be improved, and the model stability and accuracy are enhanced.

The present invention discloses a folding capture method of a direct sequence spread spectrum long code, the method comprising: performing partial matching correlation with a local folding code after preprocessing and mixing a high frequency spread spectrum signal, storing the correlation result in a two-dimensional register, performing group FFT operation and accumulation on the correlation result, obtaining a power spectrum with the same code phase of the correlation result, performing square sum of the I / Q path power spectrum module to obtain a maximum peak value much larger than other power spectrum amplitudes, comparing the maximum peak value with a threshold value, if it is greater than the threshold value, then the local spread spectrum code phase offset corresponding to the peak value is consistent with the code offset of the input signal, and the Doppler frequency deviation estimation value of the input signal can be obtained through the corresponding local spread spectrum code. The local code is folded, multiple code phases can be searched for in one correlation, and the correlation results are grouped for FFT, which can reduce the difficulty of operation and reduce the calculation time.

According to the information processing method and device, a first LDPC base matrix can be divided into two types of G * G sub-matrixes, the row weight of each G * G sub-matrix is not larger than 1, and the column weight of each G * G sub-matrix is not larger than 1, so that the hardware implementation complexity is low, and a longer code length can be supported under the same hardware. Moreover, the first region of the first LDPC basis matrix comprises the second type of sub-matrixes with at least two element arrangement modes, so that interleaving can be realized, and long codes are supported. Moreover, the first region of the first LDPC basis matrix comprises a second type of sub-matrix in an element arrangement mode, so that the gain in the aspect of decoding parallelism can be provided.

The present invention discloses a method and system for testing the capture of a long code signal of a satellite positioning receiver, the method comprising: setting a scene with a navigation signal simulation source; a host computer obtains a rough position and almanac information, and sends it to a receiver; adjusting an adjustable attenuator, and determining the test signal level; the host computer generates a random time offset, and sends it to a timing board, and controls the timing board to perform timing on the receiver; the host computer sends a capture instruction to the receiver; the receiver performs a capture process, calculates the time difference, and returns it to the host computer; the host computer determines the time difference, determines whether the capture is successful or failed, and calculates the capture time at the same time. The present invention can directly test the capture module of the receiver, and then evaluate the capture sensitivity, capture time, and dynamic adaptability, and provide an effective basis for the design, development, and performance improvement of the satellite positioning receiver.

The present application provides an image encoding and decoding method, device and storage medium, which relates to the field of video encoding and decoding. The encoding method includes: obtaining an encoding unit; the encoding unit is an image block in the image to be processed; the encoding unit includes encoding blocks of multiple channels; the multiple channels include a first channel; the first channel is any one of the multiple channels; the encoding block of the first channel is encoded according to a first encoding mode; the first encoding mode is a mode for encoding sample values ​​in the encoding block of the first channel according to a first fixed-length code; the code length of the first fixed-length code is less than or equal to the image bit width of the image to be processed; the image bit width is used to represent the number of bits required to store each sample in the image to be processed. The method is applicable to the image encoding and decoding process, and is used to solve the problem of too large a substream buffer setting.

The invention discloses a coding and decoding method and device of a memory, electronic equipment and a storage medium. The coding method comprises the steps of obtaining a to-be-written data block and a known word string corresponding to the data block; performing error correction coding on the data block and the known word string to obtain error correction information; and splicing the data block and the error correction information to obtain an error correction code word and storing the error correction code word in a memory. Error correction coding is carried out by introducing a known word string and a data block, so that the length of coded data is increased, the protection capability of an error correction code word is ensured, and then the data block and error correction information are spliced to obtain the error correction code word and write the error correction code word into a memory. As the known word string is introduced for error correction coding, the error correction code word protects one data block, the strong error correction capability of the error correction code word with high code length can still be ensured, and the memory access granularity is changed into a basic access unit, so that the problems of read amplification and write amplification can also be solved when the data block is updated, and the data block updating efficiency is improved. Therefore, the contradiction between the code length of the error correction code and the memory access granularity can be weakened.

The present disclosure relates to a system (108) and a method (600) for routing one or more messages from a home network (106) to a foreign network (110) The system (108) includes a receiving unit (212) to load a short code to long code map at an application on a server (104) in the foreign network (110) and the one or more messages from a User Equipment (UE) (102). The system (108) includes an identification unit (214) to identify a long code for the corresponding short code. The system (108) includes a conversion unit (216) to convert the short code to the identified long code upon identification of the long code. The system (108) includes a routing unit (218) to route the one or more messages to the application on the server (104) in the foreign network (110) utilizing the long code.

The invention relates to a method and equipment for capturing a cold start long code signal of a satellite navigation receiver, and a medium. According to the method, for the three-dimensional search process of different satellites, carrier frequency and code phase confronted by long code signal capture, a minimized initial list of satellites to be captured is generated, the search space of different satellites is greatly compressed, and after receiver local time correction is carried out through the first satellite captured in the list, the time of the satellite to be captured is corrected. And residual satellite parallel acquisition is carried out, so that cold start time consumption of the receiver can be effectively reduced, and rapid acquisition of the cold start time length code signal of the receiver is realized.

The invention discloses an automatic Morse telegram communication method, which adopts a half-duplex communication mode and realizes automatic communication of Morse telegrams. The method comprises a link building communication stage and a text communication stage, a long code message format is adopted in the link building communication stage, and a short code message format is adopted in the text communication stage. In the link establishment communication stage, a double-layer CRC (Cyclic Redundancy Check) check, response confirmation and timeout retransmission mechanism is adopted to ensure reliable transmission of information; in the text communication stage, sub-package transmission and a unified response mechanism are adopted, and it is ensured that both real-time performance and reliability are considered in text transmission. The method effectively fills the blank of an automatic Morse telegraph communication protocol, and is suitable for application scenes needing automatic Morse telegraph communication, such as military, emergency rescue and the like.

The invention relates to the technical field of communication, in particular to a coding method and device and a decoding method and device. The method can be applied to the IEEE 802.11 ax standard, the 802.11 be standard, the 802.11 bn standard and the like and other standards of the IEEE 802.11 series, such as the 802.15 standard, the 802.11 bf standard, the IMMW standard or the star flash standard and the like. The method comprises the following steps: a first site obtains information bits, performs LDPC coding on the information bits based on a check matrix, obtains coded bits, and outputs a sequence. And after obtaining the to-be-decoded information, the second station performs LDPC decoding in combination with the check matrix to obtain information bits. The code length corresponding to the check matrix is 7776, the code rate corresponding to the check matrix is 3 / 4, and the expansion factor of the check matrix is 162. The check matrix can be better matched with a longer code length, and the coding and decoding performance is improved.

The invention discloses a high-density completion input construction and completion method for warehouse-level long codes. The method comprises the following steps: firstly, acquiring a current code snippet near a to-be-complemented position and a background long code context, performing structured analysis on the context, dividing candidate code units, and determining a code unit containing the to-be-complemented position as a query code unit; performing multi-channel correlation retrieval on the candidate code units, screening to obtain candidate subsets, performing function-level or class-level importance evaluation and reordering on the candidate subsets, performing self-adaptive truncation according to an attenuation relationship of adjacent candidate importance gains, further generating a fine-grained semantic unit sequence, dividing functional blocks, and obtaining a fine-grained semantic unit sequence; according to the method, importance evaluation is carried out on the function blocks, the function blocks are selected or cut under budget constraint, and the function blocks and current code snippets are jointly used as completion input, so that information density and task correlation are improved, reasoning cost and response delay are reduced, and stability and availability of warehouse-level long code completion are improved.

The invention discloses a long code abstract generation method based on a structure-guided sparse attention mechanism, and belongs to the field of software engineering. The method mainly solves the problem that in a long code snippet, due to the fact that the calculation complexity of a traditional Transform model self-attention mechanism is high, the performance is reduced. According to the code structure characterization method based on the abstract syntax tree (AST) and the control flow graph (CFG), the logic graph is constructed by fusing the abstract syntax tree and the control flow graph, and it is ensured that key structure features in codes are effectively reserved. On the basis, three attention distribution mechanisms are introduced, including a top-k attention distribution mechanism, a logic diagram attention distribution mechanism and a local attention distribution mechanism, and the calculation of the self-attention mechanism is sparse. Through the technical innovations, the interference of irrelevant information is inhibited while the efficient perception of the context of the long code is ensured, so that the generation quality of the long code abstract is effectively improved.

The present application relates to the technical field of communications, and particularly relates to a coding method and apparatus, and a decoding method and apparatus. The present application can be applied to the IEEE 802.11ax standard, the 802.11be standard, the 802.11bn standard, and other standards of the IEEE 802.11 series, such as the 802.15 standard, the 802.11bf standard, the IMMW standard or the SparkLink standard. The method comprises: a first station acquiring information bits, performing LDPC coding on the information bits on the basis of a parity-check matrix, so as to obtain the coded bits, and outputting a sequence; and after obtaining information to be decoded, a second station performing LDPC decoding in combination with the parity-check matrix, so as to obtain information bits, wherein the code length corresponding to the parity-check matrix is 7776, the code rate corresponding to the parity-check matrix is 5 / 6, and the expansion factor of the parity-check matrix is 162. The parity-check matrix can better match a longer code length, thereby improving the coding and decoding performance.

The present application discloses a method, device, medium and equipment for data-dependent jitter separation, which relates to the technical field of digital signal processing. Based on the traditional DDJ segmentation mode, the present application collects data of the input serial signal and segments it according to the period, calculates the DDJ data-dependent jitter after summing and averaging, and then separates the time interval error TIE according to the edge, so as to calculate the inter-symbol interference ISI and the duty cycle distortion DCD. It does not involve making a histogram statistics on the TIE, avoiding the problems of difficult confirmation of the histogram statistics interval due to the small code pattern length within a repeated period, and too large histogram statistics interval due to the too long code pattern within a repeated period, resulting in large peak errors in the statistical histogram and jitter separation errors, improving the effect of data-dependent jitter separation. At the same time, the processing speed is fast, the resource occupancy is small, and it can be applied to measurement systems with high real-time requirements for processing speed.

A parameter blind identification method for a long code LDPC belongs to the field of communication, and comprises the steps of training a generative adversarial network to perform sample data enhancement processing on sample data, and then training a neural network architecture constructed by a one-dimensional convolutional neural network and a Transformer to perform parameter identification. In order to solve the problems of insufficient data volume and single data form possibly occurring in the training process, the generative adversarial network is utilized to perform data enhancement, a new training sample is generated to supplement an existing data set, and the diversity of training data is expanded; and meanwhile, aiming at the problem that the length of the long code LDPC is relatively long, the long-distance dependency relationship and global information in the data are captured by utilizing Transform. According to the method, the generative adversarial network and Transform combined architecture is utilized, the parameter identification step of the long code LDPC is simplified, and a new thought is provided for parameter identification of the long code LDPC.

The invention provides a short message communication long code spread spectrum signal parallel capturing method, system, medium, device and program product, the method comprises the following steps: step 1, storage resource planning and time slice division are carried out, and N-beam ADC data parallel receiving processing is completed; step 2, calculating frequency compensation and local code FFT (Fast Fourier Transform), and storing an FFT conversion result of the local code added with Doppler; and step 3, completing capturing and threshold judgment on the N-beam ADC data by using the FFT conversion result of the local code added with the Doppler to obtain an effective short message signal and storing the effective short message signal. On the basis of the FFT + IFFT algorithm, parallel acquisition of multiple paths of signals is equivalently realized through storage resource planning and time slice division, parallel acquisition of burst spread spectrum signals is realized under the limitation of limited processing resources, and the receiving success rate meets the requirement.

The present application discloses a data backup method, device, equipment, medium and product. The method encodes the target data to obtain a first target code and a second target code, concatenates the first target code and the second target code to obtain a target cascade code, and saves the target cascade code so that in the event that the target data is lost, the target data can be restored through the target cascade code. Since the cascade code constructs a long code by serially cascading short codes, the length of the cascade code is less than the length of the long code constructed by a single structure and a single form of code, and therefore has the advantages of low decoding complexity, strong error correction capability and high coding efficiency. This technology can be used to solve the cache recovery problem when different nodes fall behind, and can maximize the decoding success rate under certain storage redundancy to achieve effective recovery after data loss.

The invention discloses an application program publishing method and system, a medium and a terminal, relates to the technical field of Internet, and mainly aims to solve the problems that when existing application programs of the same type are published, the application program publishing efficiency is low and the application program publishing efficiency is poor due to long code rewriting time consumption. And the problem of poor stability of the application program caused by a new program bug existing in the new code is solved. Comprising the steps of obtaining an original source code of a published application program and an update resource file of a to-be-published application program; performing name path confusion processing on the updated resource file based on a preset mapping file to obtain a confused updated resource file; based on the mapping file, obfuscating the bytecode file of the original source code to obtain an obfuscated bytecode file; and mixing and packaging the obfuscated update resource file and the obfuscated byte code file to generate an installation package of the to-be-published application program, and publishing the installation package after the installation package is operated.

According to the method, the codes with the combination of the front shape and the rear shape are formed by splitting pronunciation and fonts in multiple regions for character symbols, the unique symbols are quickly retrieved, sequential searching of human eyes is reduced, and the problems that in an input method scheme, homophones are too many, codes are too long, repeated codes are too many, and learning cost is too high are solved.

A multimode solid-state drive (SSD) and associated method. An SSD includes: a plurality of flash memory chips addressable via a physical block address (PBA); and a controller chip configured to map logical block addresses (LBAs) from a host to PBAs, wherein the controller chip is further configured to handle different LBA block sizes according to a process that includes: partitioning a base partition to store one a long code word of size Clong having a single base data block protected with error correction coding (ECC); and partitioning a set of non-base partitions, each partitioned for a plurality of shortened code words, wherein each shortened code word is configured to store a shortened data block protected with ECC, and wherein the plurality of shortened code words are configured to be protected with ECC as a combined long codeword of size Clong.

The invention relates to the technical field of signal performance evaluation, in particular to a non-cooperative long code navigation signal performance evaluation method and related equipment, and the method comprises the following steps: obtaining a QPSK modulated non-cooperative long code navigation signal and a baseband code stream symbol; after the standard long code sequence is divided into equal-length signal segments, a sectional type parameter configuration correlation / integral method is used for capturing and tracking to obtain observed quantity information, and according to the standard long code sequence, the error performance of the non-cooperative signal code element sequence is evaluated, and the error rate and the position are counted; comparing the code element sequence after the baseband signal time domain waveform superposition with a local template, and evaluating time domain waveform distortion; the method comprises the following steps: quantifying non-cooperative signal channel characteristics, estimating digital distortion parameters through segmented accumulation of baseband signals, solving a response coefficient of an analog distortion filter by using a least square method, calculating an amplitude-frequency characteristic peak-to-peak value and a group delay variance, evaluating analog channel frequency response characteristics, and realizing accurate evaluation of non-cooperative long code signals.

The application discloses a kind of inter-satellite microwave measurement communication link signal generation and chain building method, comprising: generating transmitting signal based on direct sequence spread spectrum mode, and transmitting signal is divided into mutually orthogonal I branch and Q branch, and the spread spectrum code sequence of different length is modulated to two branches respectively;I branch is used as measurement branch, fixed modulation long code is used and binary offset subcarrier modulation mode is used, and measurement data frame with fixed frame length and information rate is loaded on I branch;Q branch is set to pilot mode or communication mode, short spread spectrum code is modulated in pilot mode and no data is loaded, long spread spectrum code is modulated in communication mode and communication data with configurable information rate is loaded;The start bit of spread spectrum code period of I branch and Q branch is aligned with the start bit of data frame header to the local maintained second pulse, and the generation of inter-satellite microwave measurement communication link transmitting signal is completed.The application can realize acquisition complexity and pseudo-range measurement accuracy under the condition of given bandwidth.

An information processing method and device, wherein a first LDPC base matrix used for encoding or decoding can be divided into multiple GxG sub-matrices with row weight not greater than 1 and column weight not greater than 1, the hardware implementation complexity is low, and longer code length can be supported under the same hardware. Moreover, the number of elements in the intersection of a first column set and a second column set is less than or equal to a first threshold, wherein the first column set is a set of columns in which non-zero elements of an i-th row of the first LDPC base matrix in a first region are located, the second column set is a set of columns in which non-zero elements of an i'-th row of the first LDPC base matrix in the first region are located, the i-th row and the i'-th row of the first LDPC base matrix can be any two rows in a first row set, and the first row set is a set of rows in which non-zero elements of each column in a reciprocal x-th column of a second region are located, which can accelerate the speed of information exchange, reduce decoding delay, and improve decoding performance.

The invention provides an AGV visual navigation method and system based on a double-row two-dimensional code tape, and the method comprises the steps: scanning a plurality of two-dimensional codes of the double-row two-dimensional code tape, and starting to search a three-connection code from the two-dimensional code closest to the center of a camera based on the pose information of the center point of the two-dimensional code under the center of the camera and the double-row arrangement rule of the two-dimensional code; calculating the relative pose of the three-continuous-code center and the camera center; calculating the relative pose of the three-continuous code center and the original point of the code belt; and calculating the relative pose of the vehicle body and the original point of the code band according to the relative pose of the three-continuous-code center and the camera center, the relative pose of the three-continuous-code center and the original point of the code band and the calibration result of the vehicle body and the camera. According to the navigation algorithm based on the double-row code band, a plurality of two-dimensional codes with limited categories are circularly nested, fused and arranged on the double-row long code band, and the two-dimensional code matrix information is not required to contain the relative position of the original point of the code band, so that the manpower consumption is reduced while the navigation precision is improved, and the enterprise cost is reduced.

The embodiment of the present application provides a kind of decoder and carrier rocket, comprising: jump edge detection module, for receiving the voltage signal encoded using Manchester II code and converted by physical layer transceiver, integrator, for using positive value to integrate and obtain integral value when received RX is high level, using negative value to integrate and obtain integral value when received RX# is high level;Synchronization head detection and window comparator, for using the symmetry of synchronization head, according to the start time of the jump edge of RX or the start time of the jump edge of RX#, the synchronization head is pre-judged according to integral value, in turn according to integral value appears in upper decision window or lower decision window, and according to the jump edge of RX or RX#, the code element value corresponding to data bit is determined, and when decoding or decoding is completed after the data bit of synchronization head, it is regarded as synchronization head decision success.Can deal with the problem that bus is too long code shape distortion is serious, and reliably decodes synchronization head and data bit.