36 results about "Matrix encoding" patented technology

The invention relates to a security encryption sorting method and system, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: realizing key processing and data set encryption based on a preset Paillier encryption algorithm; the server performs matrix coding and comparison operation on the encrypted data set and outputs a sorting result matrix; and the two servers cooperate with each other to complete decryption of the sorting result matrix, and a plaintext sorting result is fed back to the data holder. By adopting the method, the encrypted data is sorted, the privacy leakage risk is avoided, the approximate error in the traditional technology is eliminated, and the encrypted data analysis capability which supports any data scale, is higher in accuracy and is better in calculation efficiency is realized by designing a matrix coding technology and a security comparison protocol.

The invention discloses a feature selection method and a data reconstruction method for shoreline image feature selection. The method comprises the following steps: S1, integrating original data into a sample data set matrix X; s2, initializing a reconstruction transformation matrix W, a transformation matrix Q, an eigenvalue regression coefficient matrix A, a coordinate basis matrix B, a coding matrix E, an auxiliary matrix F and an auxiliary matrix D as unit matrixes, initializing a weight vector p and a mean vector v of a data set as unit vectors, and initializing a weight matrix P = diag (p); and S3, updating the coding matrix E, the auxiliary matrix F and the like based on the data set matrix X, the mean vector v of the data set, the transformation matrix Q, the eigenvalue regression coefficient matrix A, the coordinate basis matrix B and the weight matrix P. According to the invention, the accuracy of data reconstruction and the validity of feature selection can be improved.

The invention discloses a double-layer optimization method and system for real-time flood control scheduling of a series reservoir group. The method comprises the steps that the maximum feasible impounding boundary of each time period is calculated based on the discharge capacity and storage capacity constraint of each reservoir; constructing a space-time risk response kernel matrix, encoding lag response and attenuation intensity of flood routing, constructing a dynamic risk potential energy index in combination with real-time reservoir capacity, and solving space distribution water quantity of each reservoir by taking minimization of the index as a target under physical boundary constraint; the space distribution water quantity is used as a guide target, an evolutionary algorithm embedded with a physical consistent projection operator is adopted, and iterative optimization is carried out on hourly output flow of each reservoir. According to the method, through matrix coding of the space-time risk and introduction of manifold projection solution, the problem that upstream and downstream hydraulic space-time coupling and strong physical constraint are difficult to solve is effectively solved, and the physical consistency and peak clipping efficiency of a scheduling scheme are improved.

The invention relates to a security element (21) for a security or value document (20), the security element comprising a substrate and a combined 2D matrix code (1) that is printed on a substrate surface of the substrate and has an arrangement of modules (3) which are arranged on the substrate surface so as to define a matrix code area (2), wherein printed modules (4) of the arrangement of modules (3) are printed using colours that luminesce when illuminated with excitation light and each correspond to a colour channel of a multicolour channel system. The 2D matrix code comprises a first 2D matrix code (5), in which a first item of matrix-coded information is provided so as to be independently optically readable by means of first printed modules, and the first printed modules are printed onto the substrate in a first colour which corresponds to a first colour channel of the multicolour channel system; and a second 2D matrix code (6) which at least partially overlaps the first 2D matrix code in the region of the matrix code area (2), and in which a second item of matrix-coded information is provided so as to be readable by means of second printed modules, and the second printed modules are printed onto the substrate in a second colour which corresponds to a second colour channel of the multicolour channel system, which second colour channel differs from the first colour channel. When optically reading the combined 2D matrix code (1), the first 2D matrix code (5) can be read separately by reading the first colour channel, and the second 2D matrix code (6) can be read separately by reading the second colour channel. The invention also relates to a security or value document (20), to a method for producing a security element for a security or value document, to a method for optically reading a security element, and to a method for verifying a security or value document (20).

The invention provides an automatic component classification method oriented to multi-level category labels and related equipment. Comprising the following steps: preprocessing to-be-identified component data with a plurality of fields; extracting a text feature in the to-be-identified component data with the first format, and fusing the hierarchical structure information of the category label into the text feature to obtain a fused feature vector; loading a preset coding matrix based on the DECOC algorithm; the coding matrix is provided with a plurality of corresponding binary classifiers; fusing prediction probabilities of a plurality of pre-trained base classifiers based on a soft voting mechanism in each binary classifier to obtain corresponding weighted prediction probabilities so as to obtain a plurality of predicted weighted probabilities corresponding to the plurality of binary classifiers; combining the plurality of weighted prediction probabilities into a prediction code word; and determining a prediction category label group according to the prediction code word and the Hamming distance of each row in a preset coding matrix. And the types of the components can be quickly and accurately predicted.

The invention discloses an image segmentation method and device for a fuel particle layered micro-nano structure. The method comprises the steps of data preprocessing, wherein 3D CT data are converted into 2D Cartesian slices, polar coordinate images are obtained, and strips are divided by means of particle radial symmetry; feature extraction: constructing a main network by U-Net, and adding a position coding module (strengthening angle position modeling) and a disturbance module (improving generalization ability); the multi-class segmentation is divided into boundary dichotomy subtasks, and boundary perception weighting loss is combined with weighted binary cross entropy training. And feature fusion: defining a structure priori matrix coding coating sequence, and training the weight by classifying cross entropy through a conditional random field fusion result (ensuring topological consistency between layers). And finally, splicing strip blocks, and converting polar coordinates into a Cartesian image. The method is applied to automatic nuclear fuel detection and radiation imaging, multi-layer accurate segmentation is achieved, and the detection efficiency and precision are improved.

The application discloses a waiting time constraint batch processing pipeline crane scheduling method based on an improved slime algorithm and belongs to the field of intelligent scheduling of industrial production. The method comprises the following steps: a scheduling model is constructed, the waiting time fuzzy interval is defined by a trapezoidal fuzzy number, and the maximum completion time is minimized as the target; the waiting time uncertainty is accurately characterized by the fuzzy interval, and the fluctuation range of the waiting time in actual production is completely covered; based on the model, a hybrid improved slime algorithm is used for solving; a matrix coding and One-Hot mapping are adopted to adapt to the discrete scheduling scene; a good point set initialization method is introduced to construct an initial population, and multiple scheduling schemes are obtained; and a double tabu table strategy is combined to optimize the local search efficiency and convergence stability. The application is superior to traditional genetic algorithms, discrete slime algorithms and other comparative algorithms in terms of solution quality, convergence speed and robustness, can efficiently adapt to the crane scheduling demand of process-type industries, and provides a stable and reliable solution for multi-crane collaborative scheduling in a complex uncertain environment.

The invention relates to a security element (21) for a security or valuable document (20) and a method for manufacturing the security element (21), which comprises a substrate and a combined 2D matrix code (1), wherein the combined 2D matrix code (1) is: printed on a substrate surface; comprises an arrangement of modules formed with printed modules printed using inks that are optically readable under illumination with light; comprises a first 2D matrix code (2) in which a first matrix-coded information is provided by means of first printed modules, and the first printed modules are printed on the substrate with a first ink that is optically readable under illumination with light from a first spectral range; and comprises a second 2D matrix code (3).which is formed in the area of ​​the matrix code surface (2) and is formed at least partially overlapping with the first 2D matrix code, and in which a second matrix-coded information is provided by means of second printed modules, and the second printed modules are printed on the substrate with a second color, which can be optically read under illumination with light from a second spectral range that differs from the first spectral range. When optically reading the combined 2D matrix code (1), the first matrix-coded information can be read by reading the first 2D matrix code (2) under illumination with light from the first spectral range, and the second matrix-coded information can be read by reading the second 2D matrix code (3) under illumination with light from the second spectral range. Furthermore, a security or valuable document (20),a method for optically reading a security element and a method for checking a security or value document (20) as well as a method for optically reading are provided.

Embodiments are disclosed for a matrix coded stereo signal with periphonic elements. A mixing matrix, suitable for processing a multi-channel audio input signal, is constructed so that the resulting multi-channel output signal contains the same audio elements from the input signal, wherein the spatial relationships between audio elements, as defined by panning rules associated with the input signal format, are preserved in the output signal, as defined by matrix encoding rules associated with the output signal format. The choice of the coefficients of the mixing matrix is governed by a phase-preference rule that is used to determine the appropriate phase to apply to each input signal channel.

The embodiment of the invention provides a communication method and device. The decoding end determines a first coding matrix; the first coding matrix is determined according to at least one received first signal and / or at least one acquired interference signal between a first time for determining the first coding matrix and a second time for determining the second coding matrix, the first signal comprises the interference signal, and the second coding matrix is a coding matrix determined before the first coding matrix. And the decoding end sends first information to the coding end, wherein the first information is used for indicating the first coding matrix. And the encoding end encodes a signal to be sent to the decoding end based on the first encoding matrix. According to the method, the decoding end determines the coding matrix once every a period of time and determines the coding matrix based on the interference signal, the coding matrix adopted by the coding end is variable and changes along with the interference of the surrounding environment, and compared with coding by using a factory fixed coding matrix, the decoding end can estimate the interference signal more accurately, and the coding efficiency is improved. And communication quality is improved.

A user equipment (UE) reports channel state information (CSI) to a base station in multiple-input multiple-output (MIMO) transmissions. The UE constructs a CSI matrix based on a CSI reference signal (CSI-RS) received from the base station. The CSI matrix is at least three-dimensional in a transmit (Tx) antenna domain, a frequency domain, and a time domain. The UE transforms the CSI matrix into a transformed matrix in at least a Tx beam domain, a delay domain, and a Doppler domain. The UE encodes the transformed CSI matrix into a one-dimensional feature vector using a multi-layered neural network, and sends the one-dimensional feature vector to the base station.

The invention relates to a security element (21) for a security or valuable document (20) comprising a substrate and a combined 2D matrix code (1) printed on a substrate surface of the substrate with an arrangement of modules (3) which are arranged on the substrate surface to cover a matrix code area (2), wherein printed modules (4) of the arrangement of modules (3) are printed using colors which luminesce under illumination with excitation light and each correspond to a color channel of a multicolor color channel system.The 2D matrix code comprises a first 2D matrix code (5) in which a first matrix-coded piece of information is provided for independent optical reading by means of first printed modules, and the first printed modules are printed on the substrate with a first color which corresponds to a first color channel of the multicolor color channel system; and a second 2D matrix code (6) which is formed in the area of ​​the matrix code surface (2) at least partially overlapping with the first 2D matrix code and in which a second matrix-coded piece of information is provided for reading by means of second printed modules, and the second printed modules are printed on the substrate with a second color which corresponds to a second color channel of the multicolor color channel system, which is different from the first color channel.When optically reading the combined 2D matrix code (1), the first 2D matrix code (5) can be read separately by reading the first color channel and the second 2D matrix code (6) can be read separately by reading the second color channel. Furthermore, a security or valuable document (20), a method for producing a security element for a security or valuable document, a method for optically reading a security element, and a method for verifying a security or valuable document (20) are provided.

The invention discloses an injection molding defect knowledge graph construction method and system based on deep learning and a medium, and relates to the technical field of data processing, and the method comprises the steps: obtaining real-time sensor data and mold flow simulation data of an injection molding machine, constructing an initial graph, inputting a space-time diagram convolution network to calculate hidden association between nodes, and outputting an association probability matrix; generating a defect texture image based on the matrix; and coding the matrix into predicate vectors, performing momentum contrast learning on the predicate vectors and image feature vectors, constructing a cross-modal shared semantic space, performing fine tuning by using real defect samples, and outputting an interpretable defect diagnosis model. The technical problems that an existing injection molding defect diagnosis method mostly focuses on data analysis of a single mode, complex relations between process parameters and defects are difficult to capture, and model interpretability is poor are solved, and sample enhancement and complex relation capture are achieved through deep learning and the generative adversarial network. And the interpretability and practicability of the model are improved.

A dynamic coding construction and low-complexity coding method and apparatus for error correction and encryption fusion, the method comprising: continuously receiving a sequence of plaintext information sent by a source, and constructing a corresponding dynamic sparse random parity check matrix H for each plaintext information. i For each H i Perform matrix block processing to obtain the H i The corresponding multiple submatrices and a double diagonal matrix T i According to T i Calculate the intermediate matrix φ from the inverse matrix and submatrix i For every K intermediate matrices φ obtained i Then, the grouping inverse algorithm is used to calculate each φ. i The corresponding inverse matrix K≥2, for each plaintext m i Based on the corresponding dynamic matrix encoding, m is obtained. i The corresponding ciphertext P is sent. i The encoding matrix is ​​constructed by combining a double diagonal matrix structure and a dynamic sparse random parity check matrix block processing method. The encoding process uses a group inversion algorithm, which reduces the complexity of obtaining the encoding matrix and the computational complexity of encoding, thus greatly improving the encoding efficiency.

The present disclosure relates to a data processing method, device, medium, equipment and product for secure computation. The secure computation is used for a first participant and a second participant to cooperatively compute the product of a target matrix and a target column vector. The method comprises the following steps: encoding the target matrix into N polynomials; generating a second ciphertext polynomial according to the N polynomials and a first ciphertext polynomial sent by the second participant; generating an N-dimensional random column vector, performing a masking process on the second ciphertext polynomial by using the random column vector, and sending the obtained masking polynomial after the masking process to the second participant; taking the random column vector as a second shard of the product, and performing a target data processing task based on the second shard. In this way, the product of the matrix and the vector can be securely computed by using the properties of the operator ring, and the present scheme can be applied to the secure computation of the product of the matrix and the vector on the ring of any modulus. In addition, the data security can be protected and the applicability can be improved in the model training scene by the present scheme.

Embodiments herein provide a method and system for utilizing time correlation in AI based sub-band CSI systems. The method includes receiving a RRC configuration along with AI configuration parameters and a CSI-RS from a network apparatus. Further, the method includes estimating a precoder based on the CSI-RS. Further, the method includes decomposing the precoder into a W1, a W2, and a Wf. Further, the method includes encoding the W1 and the Wf to obtain an encoded W1 and Wf matrix using a non-AI encoding approach. Further, the method includes encoding the W2 using an AI model selected based on the AI configuration parameters and the CSI-RS to obtain an encoded W2 matrix. Further, the method includes transmitting the encoded W2 matrix, the encoded W1 matrix, and / or the encoded Wf matrix to the network apparatus based on a timer associated with the AI configuration parameters.

A method for tracking of a semiconductor chamber part uses a matrix two-dimensional (2D) code label embedded with a tracking feature. In some embodiments, the method may include selecting a feature to embed into the matrix 2D code label to create a modified matrix 2D code label where the feature does not cause misreading of information from the matrix 2D code label when embedded into the matrix 2D code label and where the feature is configured to change based on treatment of the semiconductor chamber part, forming the modified matrix 2D code label into the semiconductor chamber part, optically inspecting the modified matrix 2D code label to determine changes to the feature, and analyzing the changes to the feature to determine a number of cleaning cycles undergone by the semiconductor chamber part based, at least in part, on the changes to the feature.

The invention relates to a security element (21) for a security document or value document (20) and to a method for producing the security element (21), the security element having a substrate and a combined 2D matrix code (1), wherein the combined 2D matrix code (1): is printed onto a substrate surface of the substrate; comprises an arrangement of modules formed by printed modules that are printed using colours that are optically readable under illumination with light; comprises a first 2D matrix code (2) in which a first item of matrix-coded information is provided by means of first printed modules, and the first printed modules are printed onto the substrate in a first colour which is optically readable under illumination with light from a first spectral range; and comprises a second 2D matrix code (3) which at least partially overlaps with the first 2D matrix code in the region of the matrix code area (2), and in which a second item of matrix-coded information is provided by means of second printed modules, and the second printed modules are printed onto the substrate in a second colour which is optically readable under illumination with light from a second spectral range which differs from the first spectral range. When optically reading the combined 2D matrix code (1), the first matrix-coded information can be read by reading the first 2D matrix code (2) under illumination with light from the first spectral range, and the second matrix-coded information can be read by reading the second 2D matrix code (3) under illumination with light from the second spectral range. The invention also relates to a security document or value document (20), to a method for optically reading a security element, to a method for verifying a security or value document (20), and to an optical reading method.

Embodiments of the present application provide a video generation method and device, computer equipment, computer readable storage medium and computer program product, belonging to the field of video processing, comprising: dividing a video token sequence into multiple sequence fragments; distributing the multiple sequence fragments to multiple GPUs for processing; respectively aggregating local query matrices, local key matrices and local value matrices in multiple groups of local matrices; performing space-time position coding on a global query matrix and a global key matrix; dividing the global value matrix and the coded global query matrix and the coded global key matrix according to the attention head dimension, and distributing the divided matrices to the corresponding GPUs; aggregating the attention calculation results of each GPU; and generating multiple target video frames corresponding to multiple initial video frames according to the aggregated attention calculation results. The technical solution of the embodiments of the present application can improve the upper limit of the inference length and the model scalability of video generation.

The application relates to the technical field of distributed computing, and discloses an information collaborative processing method and system in a distributed environment, which comprises the following steps: acquiring node connection relations to form a global connection dataset, calculating node connection degrees, average path lengths and comprehensive load scores; screening high-stability nodes as candidate backbones, and selecting a minimum backbone set to cover all non-backbones; periodically collecting local state characteristic vectors of the non-backbones, collecting global state information, and redundantly storing the global state information in the non-backbones after encoding by using a Vandermonde matrix; monitoring backbone abnormalities to trigger reconstruction, and acquiring encoded blocks from the non-backbones by a new backbone node to recover the global state information through error correction code decoding; and publishing an updated task list and routing instruction according to the recovered information to complete collaborative relationship reconstruction. The method can realize reliable storage and rapid recovery of global state information, and significantly improves the self-adaptability, fault tolerance and collaborative efficiency of a distributed system.

The invention discloses an unmanned aerial vehicle multi-view image-based lightweight beam bottom panoramic reconstruction and intelligent disease positioning method, which comprises the following steps: S1, acquiring a beam bottom image according to a matrix track by using an unmanned aerial vehicle carrying a camera, calculating a sparse point cloud and a camera pose through an incremental structured motion algorithm, and combining plane fitting and multi-thread parallel processing to obtain a beam bottom image; panoramic reconstruction of a single beam body is realized; s2, eliminating image illumination and color temperature differences by applying a white balance lookup table and a gridding Laplacian fusion algorithm, and constructing a matrix coding system at the same time to realize high-precision mapping of diseases and image coordinates; and S3, carrying out crack segmentation by adopting a Light TransUNet model, and realizing submillimeter-level accurate positioning of a disease position through space mapping information of matrix coding. Automatic detection and space positioning of the beam bottom crack can be completed without a high-precision positioning sensor or additional fixing equipment, and the method is suitable for high-frequency detection of small and medium span bridges.

The application relates to the technical field of LED display control, and particularly discloses an LED display information matrix coding system based on distributed control, which collects spatial coordinates of each sub-region and an overall pixel matrix; chaos initial values are allocated to each sub-region according to the spatial coordinates and are injected into a chaos oscillation loop to generate a local clock reference signal; the overall pixel matrix is decomposed into sub-matrices, and phase coding is embedded into the sub-matrices as synchronous time stamps to form coding data packets; each sub-region exchanges weakly coupled synchronous pulses through a coupling channel, and the phase is calibrated by using the chaos phase synchronization characteristic, so that all the local clock reference signals are aligned; when a preset common phase value is reached, the decoded sub-matrices are converted into driving current outputs to complete the whole-screen synchronous refreshing; and the application realizes nanosecond-level clock synchronization of distributed sub-regions and eliminates accumulated offset.

This application relates to a hierarchical path planning method, apparatus, computer equipment, readable storage medium, and program product for a traction substation robot, belonging to the field of robot path planning technology. This application can improve planning efficiency and address poor environmental adaptability. The method includes: constructing a two-dimensional grid map based on the physical environment information of the traction substation; determining the robot's starting point and a set of task points to be inspected on the two-dimensional grid map; encoding the task point set using a matrix encoding network based on a MatNet architecture to obtain a node pair feature matrix that integrates global topological relationships; generating a global target inspection path based on the node pair feature matrix using a trained generative diffusion model; generating local navigation paths connecting each task point in the global target inspection path; and constructing a third-order Bézier curve to smoothly fit the key inflection points of the local navigation path to generate a final execution path that satisfies the robot's minimum turning radius and kinematic constraints.

The present application provides a communication method, an apparatus, a device, and a storage medium. The method comprises: on the basis of a 16*32 base matrix, determining a check matrix corresponding to a target code length, and sending first information obtained by encoding on the basis of the check matrix, wherein a first base matrix supporting a first code length is associated with a second base matrix supporting a second code length, for example, the position of a cyclic shift matrix represented by a first element of the first base matrix is the same as the position of a cyclic shift matrix represented by a first element in the second base matrix. For determination of a check matrix by a communication device, the processing complexity is reduced, thereby improving the data transmission reliability of a system. Further, in embodiments of the present application, in the check matrix determined on the basis of the 16*32 base matrix, the first element in the 17th column is zero, and the xth element and the 16th element in the 17th column are the same non-zero element, x being an integer greater than 1 and less than 16, thereby improving the encoding flexibility.

The application provides a quantum circuit construction method and device and a storage medium, and solves the technical problem of how to generate a corresponding quantum circuit by matrix encoding in the related art. The quantum circuit construction method comprises the following steps: determining a to-be-decomposed matrix A and a set of non-zero elements in the to-be-decomposed matrix A; converting the non-zero element indexes in the to-be-decomposed matrix A into a binary representation form; expanding and re-representing each term in the to-be-decomposed matrix A as a matrix A' according to the binary representation form of the non-zero element indexes in the to-be-decomposed matrix A; determining the logical gate type corresponding to each subterm in each term of the matrix A' according to the values of the subterms in each term of the matrix A'; determining a quantum subcircuit and a coefficient corresponding to the quantum subcircuit according to the logical gate type corresponding to each subterm in each term of the matrix A'; wherein the quantum subcircuit corresponds to a non-zero element; and constructing a quantum circuit according to the coefficient and the quantum subcircuit.

The invention provides a position sensing mark for a deformed surface and a reconstruction method thereof, the mark is formed by arranging a plurality of positioning dots in a honeycomb shape, a hexagon is used as a self-recognition unit, and the colors of the positioning dots are selected from a stable color set calibrated by multiple brightness levels. Generating a unique ID according to the color features of the positioning dots and a preset ID reading sequence; the reconstruction method comprises the steps of image acquisition, feature detection, grid reconstruction, ID recognition, three-dimensional reconstruction and experimental verification, and high-precision reconstruction is realized in combination with binocular vision and interpolation correction technologies. According to the method, the dependence of traditional matrix coding on a rigid surface is broken through, the mark field is generated through graph theory modeling, the brightness interference resistance is improved through color calibration, the coding value matching process is not affected by adjacent dots, and the method is suitable for the fields of non-planar object positioning, dynamic garment capturing, AR and the like and has the advantages of being stable in recognition, high in reconstruction precision and high in robustness.

The present disclosure relates to quantum computing methods and devices, wherein a computation corresponding to a certain desired unitary transformation of the Hilbert space of a quantum system, such as a set of qubits, is implemented by selective application of control pulses in order realize a continuous time quantum computation rather than by decomposing the unitary transformation into a sequence of gates taken from a fixed set of gates. In this way an effective Hamiltonian having an input matrix A encoded as an off-diagonal block connecting a first and a second subspace of the quantum system is then applied alternatingly with some standard Hamiltonian in order to obtain a time evolution corresponding to a given function f applied to the input matrix A. The required control pulses are optimized by means of classical compression techniques such as a deep learning neural network, in order to maximize, during the information loading phase of the computation, the amount of classical information loaded into the system, and, during the computational phase, the number of elementary continuous time quantum transformations, respectively.

The invention discloses a physical drive neural network method and system based on physical field mapping. A space-time coordinate matrix is coded into a coded space-time field through a coding formula; inputting the coding space-time field into a physical field neural network; designing an output layer neuron for each target physical field component, and generating an expected physical field; a numerical differentiation method is adopted to obtain a high-order differential term of a physical quantity, and the problem that a derivative solved by applying a chain rule in a network is inconsistent with physical meaning in a partial differential equation is solved; inputting all physical quantities into a loss function customized based on a physical formula or physical information; updating trainable parameters in the model based on a back propagation algorithm of gradient descent until a stopping criterion is met; and outputting the required physical quantity. According to the method, the calculation precision and the operation efficiency of the model are improved by improving the design of the traditional physical driving machine learning input and output layers.

Provided herein are systems and methods of encoding messages into images. At least one server can identify a first image having a first plurality of pixels in a color space having a set of channels. The at least one server can generate, using a message to encode in the first image, a data matrix identifying a plurality of values. The at least one server can apply a machine learning (ML) model comprising a plurality of convolutional layers to the first image and to the data matrix to generate a second image having a second plurality of pixels in the color space. The second image can correspond to the first image encoded with the data matrix across the set of channels in the color space.

This application provides a method and apparatus for information transmission, which can reduce the decoding delay of information at the receiving end. The method includes: a first communication device obtaining a parity check matrix based on a first LDPC matrix, a first expansion factor, and shift values ​​corresponding to the first LDPC matrix; any first shift value in the set of first shift values ​​corresponding to a first element and any second shift value in the set of second shift values ​​corresponding to a second element satisfy at least one of a first condition or a second condition; the first element and the second element are two elements in the first LDPC matrix that are row-adjacent, column-adjacent, and both non-zero; the first LDPC matrix is ​​a base matrix or a matrix obtained by improving a base matrix; the first communication device sends information encoded using the parity check matrix to a second communication device; the second communication device decodes the received information to be decoded based on the parity check matrix to obtain a decoded bit sequence.