Abstract: Example embodiments provide a multimedia data processing method and apparatus, a computer device, a computer-readable storage medium, and a computer program product. The method includes: obtaining a global reference data block set and a local reference data block set, the global reference data block set and the local reference data block set being associated with a first data block in a multimedia data frame, the global reference data block set including a coded data block having no adjacent relationship with the first data block in the multimedia data frame, and the local reference data block set including a coded data block having an adjacent relationship with the first data block in the multimedia data frame; and determining a reference data block for coding or decoding of the first data block from the global reference data block set and the local reference data block set.

Abstract: Embodiments of this disclosure disclose a multimedia data processing method, apparatus, device, computer-readable storage medium, and computer program product. The method includes: acquiring attribute information of a to-be-decoded data block in a multimedia data frame; acquiring a first target reference data block matching the attribute information of the to-be-decoded data block from one of: a first reference data block set, a second reference data block set, or a third reference data block set integrating the first reference data block set and the second reference data block set, the first reference data block set comprising decoded data blocks not having a neighbor relationship with the to-be-decoded data block, and the second reference data block set comprising decoded data blocks having a neighbor relationship with the to-be-decoded data block; and decoding the to-be-decoded data block according to the first target reference data block.

Abstract: Some aspects of the disclosure provide a method for picture block prediction. For example, a type of a current pixel string where a current pixel in a current picture block is located is acquired. A reference pixel for the current pixel is determined according to the type of the current pixel string. A prediction sample of the current pixel is obtained according to a color sampling mode of the current picture block and the reference pixel. When position information of the prediction sample satisfies a sampling requirement according to a color sampling ratio associated with the color sampling mode, the prediction sample includes a chroma prediction sample that is obtained based on the reference pixel. Prediction values of the current picture block are obtained according to the prediction sample of the current pixel.

Abstract: Some aspects of the disclosure provide a method of video processing. In some examples, a current chrominance block in a current picture carried in a video bitstream being coded in a chrominance block copy intra prediction mode is determined. The chrominance block copy intra prediction mode can predict at least a value of the current chrominance block based on a displacement vector. A target displacement vector of a co-located luminance block of the current chrominance block is obtained. The target displacement vector is selected from a plurality of candidate displacement vectors associated with the co-located luminance block of the current chrominance block. At least a predicted value of the current chrominance block is determined based on the target displacement vector. The current picture that includes the current chrominance block is reconstructed based on at least the predicted value. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also contemplated.

Abstract: The present disclosure provides a video decoding method performed by an electronic device. The method includes: decoding a bitstream to obtain a first flag, a first index value, and a second index value; determining a target intra prediction mode in a first intra prediction mode list according to the first index value and a target weighting list in a weighting list set according to the second index value when the first flag satisfying a first preset condition; determining reference samples of a first category and reference samples of a second category according to reference samples corresponding to the current block, and weighting the reference samples of the first category and the reference samples of the second category based on the target weighting list to obtain weighted reference samples; and predicting samples the in the current block according to the weighted reference samples and the target intra prediction mode.

Abstract: Example embodiments provide a multimedia data processing method and apparatus, a computer device, a computer-readable storage medium, and a computer program product. The method includes: obtaining a global reference data block set and a local reference data block set, the global reference data block set and the local reference data block set being associated with a first data block in a multimedia data frame, the global reference data block set including a coded data block having no adjacent relationship with the first data block in the multimedia data frame, and the local reference data block set including a coded data block having an adjacent relationship with the first data block in the multimedia data frame; and determining a reference data block for coding or decoding of the first data block from the global reference data block set and the local reference data block set.

Abstract: A method for determining a prediction sample of a picture block includes acquiring a type of a current pixel string where a current pixel in a current picture block is located, and determining a reference pixel value of the current pixel according to the type of the current pixel string. The method further includes obtaining a prediction sample of the current pixel according to a color sampling mode of the current picture block and the reference pixel value of the current pixel. A color sampling mode of the obtained prediction sample is consistent with the color sampling mode of the current picture block. The method further includes obtaining prediction values of the current picture block according to the prediction sample of the current pixel.

Abstract: The embodiments of the disclosure provide an interpolation filtering method and apparatus for intra-frame prediction, a medium, and an electronic device. According to a distance between a prediction pixel and a first reference pixel, a target filter matching the distance is selected from a filter parameter corresponding to a specified prediction unit, and interpolation filtering processing is performed on a second reference pixel by using the target filter, to obtain a predicted value of the prediction pixel.

Abstract: A method for encoding a string vector includes obtaining attribute information of a pixel string in an image frame, the attribute information comprising at least one of position information of the pixel string within the image frame or a length of the pixel string. The method further includes encoding information indicating a first string vector of the pixel string based on the attribute information of the pixel string to obtain a bitstream.

Abstract: The present disclosure provides a video decoding method. The method includes obtaining a bitstream that needs to be decoded, the bitstream that needs to be decoded comprising a current decoding block, the current decoding block using an intra string copy mode, and the current decoding block comprising a current string; determining a string length encoding resolution of the current string; decoding the bitstream that needs to be decoded to obtain an encoded string length corresponding to the current string; and obtaining a string length of the current string according to the string length encoding resolution of the current string and the corresponding encoded string length. The string length encoding resolution of the current string is at least one of the following: at least one preset value, each preset value being an integer pixel greater than or equal to 1, or a width or a height of the current decoding block.

Abstract: The present disclosure provides a system for CO2 storage and utilization of a concrete mixing plant and a method thereof. The system includes a slurry making module, a cyclic grinding module and a material storage and application module. The cyclic grinding module can grind, in the presence of a gas containing CO2 and medium balls, a composite slurry prepared by the slurry making module, and can cyclically use the gas containing CO2, so as to realize continuous production of a carbon-mineralized slurry. The material storage and application module includes a material storage bin and a mixing machine connected with each other, and the material storage bin is configured to receive and store the carbon-mineralized slurry from a slurry bin. The mixing machine is configured to mix and prepare the carbon-mineralized slurry into a commodity concrete.

Abstract: The present disclosure provides a system for CO2 storage and utilization of a concrete mixing plant and a method thereof. The system includes a slurry making module, a cyclic grinding module and a material storage and application module. The cyclic grinding module can grind, in the presence of a gas containing CO2 and medium balls, a composite slurry prepared by the slurry making module, and can cyclically use the gas containing CO2, so as to realize continuous production of a carbon-mineralized slurry. The material storage and application module includes a material storage bin and a mixing machine connected with each other, and the material storage bin is configured to receive and store the carbon-mineralized slurry from a slurry bin. The mixing machine is configured to mix and prepare the carbon-mineralized slurry into a commodity concrete.

Abstract: A video decoding method, includes: partitioning a chroma block into at least one chroma sub-block based on determining a first block vector (BV) of the chroma block is derived from a second BV of a luma block; acquiring a third BV of a first luma sub-block corresponding to the at least one chroma sub-block; mapping the third BV to a fourth BV of the at least one chroma sub-block according to a chroma scale factor of video to be decoded; and decoding the chroma block according to the fourth BV to obtain a reconstructed block corresponding to the chroma block.

Abstract: A video processing method, performed by a computer device, includes: performing compound prediction on a current block to be decoded in a video bitstream; determining, for the current block based on significance of one or more first reference predicted values derived from one or more reference blocks of the current block, a target weight group including one or more first weight values, and the significance indicating a degree of impact of a corresponding reference predicted value on decoding performance for the current block; performing weighted prediction on the one or more first reference predicted values based on the one or more first weight values obtain a predicted value of the current block; and reconstructing a decoded image corresponding to the current block based on the predicted value, wherein the one or more first reference predicted values are in a one-to-one correspondence with the one or more reference blocks.

Abstract: This application relates to the field of video coding and decoding technologies, and provides a video decoding method and apparatus, a video coding method and apparatus, a device, and a storage medium. The method includes decoding, from a bit stream, a binary symbol string with string length information of a current string, the string length information comprising information related to a string length of the current string; inversely binarizing the binary symbol string according to a string length resolution (SLR) of the current string, to obtain the string length information; and determining the string length of the current string according to the string length information.

Abstract: A video decoding method and apparatus, a video encoding method and apparatus, a computer device, and a storage medium, which belong to the field of video processing. The video decoding method includes: performing classification on a displacement vector of a decoded block in a historical motion information list according to a following classification method, the classification method comprising: in a case that the decoded block satisfies a classification condition of any class of a plurality of classes, adding the displacement vector of the decoded block to the class, and stopping performing classification on the displacement vector of the decoded block.

Abstract: A video decoding method, a video encoding method, related devices, and a storage medium are provided. The video decoding method includes: determining a current string to be decoded from a current coding unit of a current image; based on the current string being a unit vector string and the current string including a first pixel, determining a reference pixel of the first pixel from a historical decoding unit in the current image, the historical decoding unit being a decoded coding unit adjacent to the current coding unit in the current image, the reference pixel of the first pixel being adjacent to the first pixel in the current image; and acquiring a predicted value of the first pixel based on a reconstructed value of the reference pixel of the first pixel to obtain a decoded image.

Abstract: This application provides a displacement vector prediction method and apparatus in video encoding/decoding and a device and relates to the field of video codec technologies. In this application, candidate displacement vectors are constructed by combining displacement vectors related to a plurality of prediction modes, and then a predicted displacement vector of a current unit is derived from the candidate displacement vectors. Information about an encoded/decoded unit having a same prediction mode as the current unit can be used and information about an encoded/decoded unit having different prediction modes from the current unit is also allowed to be combined to derive the predicted displacement vector of the current unit, so that the candidate displacement vector has a higher possibility to be selected as the predicted displacement vector, thereby improving the encoding performance of the displacement vector.

Abstract: An image processing method includes acquiring coordinates of a pixel in a first image block, the first image block being an image block in an equirectangular projection (ERP) format corresponding to an image block in a panoramic image. The coordinates include a latitude of the panoramic image. The method further includes, when the latitude included in the coordinates is less than a first threshold or greater than a second threshold, deleting one or more angle prediction modes from a current intra prediction mode set to obtain a first intra prediction mode set. The method further includes determining a target intra prediction mode of the first image block according to the first intra prediction mode set, and performing intra prediction on the first image block using the target intra prediction mode to obtain prediction information of the first image block.

Abstract: This application provides a method and an apparatus for constructing a motion information list in video encoding and decoding and a device, which relates to the field of video encoding and decoding technologies. The method includes: constructing a space domain motion information list, the space domain motion information list including motion information of a space domain neighboring block of a current block, and the space domain neighboring block including at least an intra string copy (ISC) block; and obtaining at least one piece of motion information from the space domain motion information list when motion information in a candidate motion information list is insufficient, and filling the candidate motion information list using the at least one piece of motion information.