30 results about "Sparse matrix multiplication" patented technology

A matrix multiplication parallel calculation system based on multi-FPGA is prepared as utilizing FPGA as processing unit to finalize dense matrix multiplication calculation and to raise sparse matrix multiplication calculation function, utilizing Ethernet and star shaped topology structure to form master-slave distributed FPGA calculation system, utilizing Ethernet multicast-sending mode to carry out data multicast-sending to processing unit requiring the same data and utilizing parallel algorithm based on line one-dimensional division output matrix to carry out matrix multiplication parallel calculation for decreasing communication overhead of system.

Hardware accelerator for compressed Long Short Term Memory (LSTM) is disclosed. The accelerator comprise a sparse matrix-vector multiplication module for performing multiplication operation between all sparse matrices in the LSTM and vectors to sequentially obtain a plurality of sparse matrix-vector multiplication results. A addition tree module are also included for accumulating a plurality of said sparse matrix multiplication results to obtain an accumulated result. And a non-linear operation module passes the accumulated results through an activation function to generate non-linear operation result. That is, the present accelerator adopts pipeline design to overlap the time of data transfer and computation for compressed LSTM.

For some video processing applications, most notably watermark detection (40), it is necessary to add or average (parts of) the two interlaced fields which make up a frame. This operation is not trivial in the MPEG domain due to the existence of frame-encoded DCT blocks. The invention provides a method and arrangement for adding the fields without requiring a frame memory or an on-the-fly inverse DCT. To this end, the mathematically required operations of inverse vertical DCT (321) and addition (322) are combined with a basis transform (323). The basis transform is chosen to be such that the combined operation is physically replaced by multiplication with a sparse matrix (32). Said sparse matrix multiplication can easily be executed on-the-fly. The inverse basis transform (35) is postponed until after the desired addition (33, 34) has been completed.

A method of transferring entire frequency shadow owing to the pre-computed radiancey of GPU, (1) making use of the circumstance illuminance image to pursues the illumination to circumstance , getting the radiation delivery function B = TL, matrix T is radiation delivery matrix, L is an illuminant matrix; (2) pre-computing the radiation delivery matrix T; (3)getting sparse radiation delivery matrix when the pre-computed radiation delivery matrix T compressed in quantization owe to small echo alternation; (4) rearranging the sparse radiation delivery matrix in (3) to put the important matrix in the front part; (5) doing small echo alternation rapidly for L, getting sparse illuminant matrix which has been quantization compressed; (6) carrying out rapidly sparse matrix multiplication on T and L in GPU to accomplish the re illumination exaggeration. The invention make use of the data structure and algorithm according to the ability of GPU that computed in parallel, it can reach fairly good balance between CPU loads and GPU loads, exaggerating speed and exaggerating quality . It can reduce the use of memory and keep the quality of exaggerating at the same time, and the exaggerating speed has increased in wide-range. It has reached the purpose of exaggerating entire frequency shadow in real time.

The invention provides a large-scale sparse matrix multiplication method based on mapreduce. Suppose that the large-scale sparse matrixes are A and B, and a multiplication matrix of A and B is C. The method includes the following steps: step 10, a mapreduce Job finishes transposing of the matrix A and outputting of a matrix A'; step 20, a transformational matrix B converts a storage mode using the matrix B as a coordinate point into a storage mode of sparse vector, and outputs a matrix B'; step 30, connecting the matrix A' and the matrix B', calculating a product component, obtaining the product component of a column number K on the matrix A and column number K on the matrix B of Cij; step 40, merging the product components, calculating Cij through accumulation of the product components Cij_k. The large-scale sparse matrix multiplication is converted into basic operations of transposition and transformation, connection and merging and the like which are suitable for mapreduce calculation, and the problem of resource limit of a single machine large-scale sparse matrix multiplication is solved.

The invention relates to a single FPGA matrix multiplication device that comprises P2 PEs formed in P row and P column matrix, data input and output interface and data pre processing unit. It can manage dense matrix and loose matrix multiplication with improvement in computing performance. It also relates to a matrix multiplication device based on FPGA.

The invention discloses a circuit for realizing sparse matrix multiplication. The circuit comprises multiple modules, all the modules are coordinated and matched; in the multiplication process of thesparse matrix, the sparse matrix can be multiplied; non-zero elements in the sparse matrix are screened out; in addition, the calculation process is carried out, column flag bits of all rows of a first matrix and row flag bits of all columns of a second matrix are subjected to bitwise operation; and finally, non-zero elements which really need to participate in operation are selected from the non-zero elements according to the target flag bit, so that the calculation process of a large number of zero elements and the non-zero elements which do not need to participate in operation is avoided,and the efficiency of sparse matrix multiplication operation is remarkably improved. In addition, the invention further provides an FPGA board, and the effect of the FPGA board corresponds to the effect of the circuit.

An apparatus to facilitate acceleration of matrix multiplication operations. The apparatus comprises a systolic array including matrix multiplication hardware to perform multiply-add operations on received matrix data comprising data from a plurality of input matrices and sparse matrix acceleration hardware to detect zero values in the matrix data and perform one or more optimizations on the matrix data to reduce multiply-add operations to be performed by the matrix multiplication hardware.

The invention discloses a sparse matrix method-based network topology analysis method for a power system. The method is implemented by adopting sparse matrix technology based on solving a full connection matrix by using adjacency matrix self multiplication. The method still has the advantage of a matrix method, has the characteristics of clear concept and simple programming of the matrix method, and has higher computing speed compared with the conventional matrix method. The sparse matrix computing technology adopted in multiplication of a full matrix and a sparse matrix greatly improves the network topology analysis speed. Nodes are optimized and numbered in order from large to small number of closed switches connected with the nodes, and buses are optimized and numbered in order from large to small number of branches connected with the buses, so the matrix multiplication computing quantity is reduced. The adjacency matrixes are sparsely stored so as to effectively save the storage space of a computer.

The invention provides a sparse matrix storage and calculation system and method, and belongs to the field of microelectronic devices. The system comprises a first storage array which is used for storing a coordinate index table of non-zero elements of a sparse matrix; the second storage array is used for storing elements of the sparse matrix and also serves as an in-situ calculation kernel of sparse matrix multiplication; the block storage scheduling unit is used for partitioning the sparse matrix into a plurality of sub-matrixes and storing the sub-matrixes into a second storage array according to different compression formats, and establishing an index table corresponding to the sparse matrix; and the second peripheral circuit is used for converting the vector into a voltage signal and applying the voltage signal to a bit line or a word line corresponding to a sub-matrix of the sparse matrix to complete multiplication of the sparse matrix and the vector.

The invention discloses an in-memory sparse matrix multiplication operation method, an equation solving method and a solver, and the multiplication operation method comprises the steps of compressing an original sparse matrix to form a compressed matrix, representing the elements of the compressed matrix as complements, and splitting the matrix into a binary sign bit matrix and a binary data bit matrix; respectively storing the split matrixes into a binary memory array; representing elements multiplied by the compression matrix in the original vector as complements, splitting the complements, inputting the complements into a memory array in a voltage form, multiplying the complements by conductance of a storage bit, outputting the complements in a current form, detecting the output current, and performing analog-to-digital conversion to obtain a binary numerical value; and shifting and accumulating the product result of each memory array according to a binary operation rule to obtain the product of the original sparse matrix and the original vector. Through the operation method, the storage space can be reduced, so that the power consumption of the circuit is reduced, a low conductivity value is avoided, and the calculation error is reduced.

The invention discloses a matrix multiplication circuit, a method for executing sparse matrix multiplication by using the matrix multiplication circuit and a related product. The matrix multiplication circuit may be implemented as a computing device included in a combinatorial processing device, which may also include an interface device and other processing devices. The computing device interacts with other processing devices to jointly complete computing operation specified by a user. The combined processing device can further comprise a storage device, and the storage device is connected with the computing device and the other processing devices and used for storing data of the computing device and the other processing devices. The scheme of the disclosure provides a circuit supporting sparse matrix multiplication, which can simplify processing and improve processing efficiency of a machine.

The invention discloses a space-time diagram neural network accelerator structure based on an FPGA, a tensor and vector double acceleration module parallel processing mode is designed, a vector acceleration module executes sparse matrix multiplication or element-by-element multiplication and addition operation, and a tensor acceleration module executes dense matrix multiplication, bias term addition and operation of different activation functions. The system control module controls the tensor acceleration module and the vector acceleration module to complete calculation corresponding to a calculation time sequence according to the set calculation time sequence, and the data flow control module controls the data flow direction between the tensor acceleration module and the vector acceleration module so as to complete calculation in a circulating mode. According to the design of the whole architecture, efficient processing of a three-dimensional space-time diagram neural network is achieved, and calculation of a multifunctional function is achieved in a simple mode; the acceleration calculation of multiple neural network modes can be realized, so that the method can be downwards compatible with the acceleration of multiple network models such as a graph convolutional neural network GCN and a gated recursive unit GRU, and has higher universality.