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.

Abstract: This application provides a method for constructing a candidate motion information list performed by a computing device. The method includes: obtaining a candidate motion information list for providing one or more candidate prediction displacement vectors for a current coding unit; determining at least one piece of motion information when a length of the candidate motion information list meets a condition, the length referring to a number of pieces of motion information in the candidate motion information list; and adding the at least one piece of motion information to the candidate motion information list to obtain an updated candidate motion information list. By filling a candidate motion information list using extra motion information when existing motion information included in the candidate motion information list is insufficient, more effective displacement vectors are provided in the candidate motion information list to achieve a better displacement vector prediction effect.

Abstract: A video decoding and encoding method and apparatus, a computer-readable medium, and an electronic device. The video decoding method includes classifying decoded blocks adjacent to a target block according to information about the decoded blocks to obtain at least one category, obtaining a category identifier corresponding to the target block based on coding information corresponding to the target block, determining a target category corresponding to the target block from the at least one category according to the category identifier corresponding to the target block, determining a predictive vector of the target block based on vectors of decoded blocks included in the target category, and decoding the target block based on the predictive vector.

Abstract: A video decoding and encoding method and apparatus, a computer-readable medium, and an electronic device. The video decoding method includes classifying decoded blocks adjacent to a target block according to information about the decoded blocks to obtain at least one category, obtaining a category identifier corresponding to the target block based on coding information corresponding to the target block, determining a target category corresponding to the target block from the at least one category according to the category identifier corresponding to the target block, determining a predictive vector of the target block based on vectors of decoded blocks included in the target category, and decoding the target block based on the predictive vector.

Abstract: This application provides a method for decoding an unmatched pixel performed by an electronic device. The method includes: obtaining a bit stream of a target video sequence and decoding the bit stream of the target video sequence by at least two entropy decoding methods, to obtain a binary symbol string of an unmatched pixel in a target picture block, the target picture block being obtained by dividing a target picture frame in the target video sequence; inversely binarizing the binary symbol string, to obtain a component value of the unmatched pixel; and obtaining the target picture block based on the component value of the unmatched pixel. This method can improve the flexibility of coding and facilitate equalization between the coding performance and the coding overhead of the unmatched pixel.

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: This application provides a method for constructing a motion information list in video encoding and decoding performed by a computer device. The method includes: obtaining a motion information list, which is a candidate motion information list is used for providing a candidate prediction displacement vector; determining at least one piece of motion information when a length of the motion information list meets a condition; and adding the at least one piece of motion information to the candidate motion information list to obtain an updated motion information list when a length of the candidate motion information list is less than a threshold. According to the embodiments of this application, by filling a motion information list using extra motion information when motion information included in the motion information list is insufficient, more effective displacement vectors are provided in the motion information list to achieve a better displacement vector prediction effect.

Abstract: Video coding/decoding can improve the uniformity of pixel strings and provide for increased coding and decoding efficiency. String length information of a current string from a bit stream is decoded. Based on the string length information and a determined string length resolution (SLR) of the current string a string length of the current string is determined. By using the SLR as a basis for dividing and decoding the pixel string, the length of the pixel string in a coding block can be limited to a multiple of the SLR, which improves uniformity of pixel strings, so that a decoder end can perform decoding with memory alignment, thereby improving decoding efficiency of the pixel strings.

Abstract: The present disclosure provides a video encoding method, a video decoding method, and a related device. The method includes: obtaining a bit stream of a current image, the bit stream comprising at least one largest coding unit (LCU) comprising a current LCU and an encoded LCU, the current LCU comprising a current decoding block comprising a current string; storing pixels in the current decoding block by using a first part of a storage space with a size of M*W, and storing at least some decoded blocks in the encoded LCU and the current LCU by using a second part of the storage space, M and W being positive integers, and M?W; and searching the second part of the storage space for a reference string for the current string, obtaining a predicted value for the current string according to the reference string, and decoding the current string.

Abstract: This application provides a method for constructing a motion information list in video encoding and decoding, an apparatus, and a device, relating to the field of video encoding and decoding technologies. The method includes: obtaining candidate motion information and a length of the motion information list; based on the length of the motion information list, determining target motion information to check for duplicates in the motion information list; checking the motion information list to for duplicates by comparing the target motion information with the motion information list; and updating the motion information list based on whether the motion information list has a duplicate of the target motion information.

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: The present invention discloses a method of preparing an alkali activation material by using red mud-based wet grinding and carbon sequestration and an application thereof. The preparation method includes: (1) adding water, red mud, a crystalline control agent, and a grinding aid into a wet grinding carbon sequestration apparatus to perform wet grinding, and simultaneously introducing CO2 until a slurry pH reaches 7 to 7.5; and removing wet grinding balls by a sieve to obtain a slurry A; (2) adding carbide slag, water and a water reducer to a wet planetary ball grinder tank for wet grinding, and removing wet grinding balls by a sieve to obtain a slurry B; (3) taking 50 to 80 parts of the slurry A and 20 to 50 parts of the slurry B and mixing them to obtain an alkali activation material.

Abstract: A video encoding/decoding approach including generating a prediction vector candidate list according to displacement vectors of an encoded/decoded block whose reference frame is a current frame; selecting a prediction vector of a to-be-encoded/decoded current block from the prediction vector candidate list; and encoding/decoding the current block based on the prediction vector of the current block.