9 results about "Integer transform" patented technology

A video decoder is configured to determine, from the encoded video data, a block of a picture; apply a neural network (NN)-based filter to the block to generate a filtered block, wherein applying the NN-based filter comprises transforming the block of the picture with a transform block, wherein transforming the block of the picture with the transform block comprises rounding a floating point value to a nearest integer; determine a decoded version of the block based on the filtered block; and output a decoded version of the picture comprising the decoded version of the block.

The present application relates to the technical field of image processing, and particularly relates to an image processing method, an electronic device and a readable storage medium, the image processing method comprises the following steps: fusing and blocking a current frame and a reference frame to obtain a plurality of to-be-encoded spatial image blocks, and combining the to-be-encoded spatial image blocks into a plurality of macroblocks, and configuring a corresponding encoding quantization table and a decoding quantization table for each macroblock; performing discrete cosine transform by using a first integer DCT transform kernel; performing quantization by using the encoding quantization table; performing entropy encoding and storing into an off-chip memory; reading a compressed code stream from the off-chip memory, performing entropy decoding, and performing inverse quantization by using the decoding quantization table; performing inverse discrete cosine transform by using a second integer DCT transform kernel; performing block recombination to obtain a reconstructed reference frame, and taking the reconstructed reference frame as a new reference frame, taking a next frame input as a new current frame, and recycling. The present application can effectively solve the technical problem of distortion accumulation in the multi-round iteration encoding and decoding process based on JPEG.

The application belongs to the technical field of data transmission, and particularly relates to a cloud server audio and video data transmission method based on an ARM architecture. The method comprises the following steps: determining an optimal segmentation mode based on a weighted combination of texture complexity, gradient information and interframe prediction residual energy of a current coding unit; dividing a sub-block based on the optimal segmentation mode, and determining whether to terminate the division according to a rate-distortion cost and a processing efficiency score of an ARM NEON instruction set; performing a bitwise exclusive OR operation on an ARM core physical identifier and a unit space position index to dynamically select an asymmetric integer transform core; generating a corresponding differentiated service code point according to a video frame type or content importance of current data, and setting the differentiated service code point into a packet header of a network data packet, so as to provide differentiated service quality guarantee in network transmission. The application solves the technical problems of insufficient hardware adaptation, low processing efficiency and poor transmission reliability in the prior art.

The invention belongs to the technical field of data transmission, and particularly relates to a cloud server audio and video data transmission method based on an ARM framework. The method comprises the following steps: determining an optimal segmentation mode based on a weighted combination of texture complexity, gradient information and inter-frame prediction residual energy of a current coding unit; subblocks are divided based on the optimal segmentation mode, and whether division is terminated or not is determined according to the rate distortion cost and the processing efficiency score of the ARM NEON instruction set; carrying out bitwise exclusive-or operation by utilizing an ARM core physical identifier and a unit space position index, and dynamically selecting an asymmetric integer transformation core; and generating a corresponding differential service code point according to the video frame type or content importance of the current data, and setting the differential service code point in a packet header of a network data packet for providing a differential service quality guarantee in network transmission. The technical problems of insufficient hardware adaptation, low processing efficiency and poor transmission reliability in the prior art are solved.

The invention relates to the technical field of high-precision anti-interference satellite navigation, in particular to a high-precision anti-interference navigation integer ambiguity fixing method, which comprises the following steps of: S1, screening satellites of which the elevation angle is greater than 5 degrees from all visible satellites to form an available satellite set; s2, estimating by using a least square method to obtain an ambiguity floating point solution of an available satellite set; s3, integer Z transformation is carried out on the auto-covariance matrix of the ambiguity floating point solution, and an ordered ambiguity subset with ambiguity correlation weakened and precision ascending order arrangement is obtained; s4, removing the ambiguity of which the integer sequential rounding success rate is lower than a threshold value from the ordered ambiguity subset according to a positive sequence, and obtaining an initial value of a partial ambiguity subset; s5, searching ambiguity candidate integer solutions and sub-selected integer solutions of the partial ambiguity subsets; and S6, judging whether the candidate integer solution check is passed or not, and if yes, successfully fixing the ambiguity integer solution.

The application relates to a general-purpose GPU-oriented JPEG decoding batch processing and double-buffer pipeline scheduling method, belongs to the field of heterogeneous computing and image processing, and comprises the following steps: obtaining code stream data of a to-be-decoded JPEG image; performing entropy decoding and inverse quantization on the code stream data by a CPU to obtain a plurality of DCT coefficient blocks; if the size of the to-be-decoded JPEG image is not smaller than a preset size threshold, the DCT coefficient blocks are cached in a ring buffer located in a host memory; the state of the ring buffer is continuously monitored; when a preset batch triggering condition is met and a GPU is detected to be available, the DCT coefficient blocks in the ring buffer are batch copied to GPU display memory; based on the DCT coefficient blocks in the GPU display memory, integer IDCT transformation and color space conversion calculation are performed by the GPU to obtain an original image corresponding to the to-be-decoded JPEG image, and the original image is read back to the host memory; wherein the double-buffer pipeline is adopted to perform batch copying of the DCT coefficient blocks, integer IDCT transformation, color space conversion calculation and reading back of the original image. Efficient real-time decoding is realized.

A video decoder is configured to determine, from the encoded video data, a block of a picture; apply a neural network (NN)-based filter to the block to generate a filtered block, wherein applying the NN-based filter comprises transforming the block of the picture with a transform block, wherein transforming the block of the picture with the transform block comprises rounding a floating point value to a nearest integer; determine a decoded version of the block based on the filtered block; and output a decoded version of the picture comprising the decoded version of the block.

Embodiments of the present disclosure provide a solution for point cloud coding. A method for point cloud coding is proposed. The method comprises: performing a conversion between a current point cloud (PC) sample of a point cloud sequence and a bitstream of the point cloud sequence, wherein in accordance with that a region adaptive hierarchical transform (RAHT) is not used as an attribute coding scheme for the current PC sample or an integer Harr transform is used for the RAHT, a first set of indications associated with a temporal filtering process is absent from the bitstream.

The invention relates to a Beidou RTK medium-long baseline positioning integer ambiguity fixing method, belongs to the technical field of RTK positioning, and is used for improving the RTK medium-long baseline positioning integer ambiguity fixing success rate and the RTK medium-long baseline positioning integer ambiguity positioning precision. The method comprises the following steps: obtaining single-difference narrow-lane ambiguity which comprises corresponding floating-point ambiguity and a variance covariance matrix thereof; integer transformation is carried out on the floating point ambiguity and the variance covariance matrix of the floating point ambiguity, and the transformed floating point ambiguity and the corresponding transformed variance covariance matrix of the floating point ambiguity are obtained; descending processing is carried out on the transformed rear difference covariance matrix according to main diagonal variance elements of the rear difference covariance matrix, and new floating point ambiguity and a corresponding new variance covariance matrix are obtained; according to the ambiguity success rate corresponding to the new variance covariance matrix, using a bootstrap method and a least square method to fix the single-difference narrow-lane ambiguity, and obtaining the fixed single-difference narrow-lane ambiguity; and obtaining a fixed solution of RTK medium-long baseline positioning by using the fixed single-difference narrow lane ambiguity.