RU2023131512A - METHOD, EQUIPMENT AND DEVICE FOR ENCODING AND DECODING - Google Patents

Claims (130)

1. A decoding method when it is determined that weighted prediction should be enabled for a current block, comprising: obtaining the weighted prediction angle of the current block; for each pixel position of the current block, determining a surrounding corresponding position, indicated by the pixel position, from surrounding positions outside the current block based on the weighted prediction angle; determining a target weight value of the pixel position based on a reference weight value associated with a surrounding corresponding position; determining an associated pixel position weight value based on the target pixel position weight value; for each pixel position of the current block, determining a first pixel position prediction value based on a first prediction mode of the current block; determining a second pixel position prediction value based on a second prediction mode of the current block; And determining a weighted pixel position prediction value based on the first prediction value, the target weight value, the second prediction value, and the associated weight value; And determining the weighted prediction values of the current block based on the weighted prediction values of all pixel positions of the current block, wherein the first prediction mode is an inter prediction mode, and the second prediction mode is an inter prediction mode, and the method also comprises: creating a list of candidates for motion compensation, wherein the list of candidates for motion compensation contains at least two information about possible motion, wherein determining the first pixel position prediction value based on the first prediction mode of the current block and determining the second pixel position prediction value based on the second prediction mode of the current block includes: analyzing the first flag information from the encoded bitstream of the current block; And, if it is determined that the first flag information indicates superposition of the motion vector difference on the first motion source vector, selecting one possible motion information from the candidate list for motion compensation as the first motion source information of the current block; determining first target motion information of the current block based on the first source motion information of the current block; And determining a first pixel position prediction value based on the first target motion information; And analyzing second flag information from the encoded bit stream of the current block; And, if it is determined that the second flag information indicates superposition of the motion vector difference on the second original motion vector, selecting other possible motion information from the candidate list for motion compensation as the second original motion information of the current block; determining second target motion information of the current block based on the second source motion information of the current block; And determining a second pixel position prediction value based on the second target motion information. 2. The method according to claim 1, in which the first motion source information contains a first motion source vector, the first motion target information contains a first motion target vector, and determining the first motion target information of a current block based on the first motion source information includes: obtaining a motion vector difference corresponding to the first initial motion vector; And determining a first target motion vector based on a difference of motion vectors corresponding to the first source motion vector and the first source motion vector; wherein the second source motion information comprises a second source motion vector, the second target motion information comprises a second target motion vector, and determining the second target motion information of the current block based on the second source motion information includes: obtaining a motion vector difference corresponding to the second original motion vector; And determining a second target motion vector based on a difference of motion vectors corresponding to the second source motion vector and the second source motion vector. 3. The method according to claim 2, in which obtaining a difference of motion vectors corresponding to the first initial motion vector includes: analyzing direction information and amplitude information of a motion vector difference corresponding to the first original motion vector from the encoded bitstream of the current block; And determining a motion vector difference corresponding to the first original motion vector based on the direction information and the amplitude information of the motion vector difference corresponding to the first original motion vector, and obtaining a motion vector difference corresponding to the second original motion vector involves: analyzing direction information and amplitude information of a motion vector difference corresponding to the second original motion vector from the encoded bit stream of the current block; And determining a motion vector difference corresponding to the second original motion vector based on the direction information and amplitude information of the motion vector difference corresponding to the second original motion vector. 4. The method according to claim 3, in which, if it is determined that the direction information indicates the direction to the right and the amplitude information indicates that the amplitude is Ar, the motion vector difference is (Ar, 0); if it is determined that the direction information indicates a downward direction and the amplitude information indicates that the amplitude is Ad, the motion vector difference is (0, -Ad); if it is determined that the direction information indicates the left direction and the amplitude information indicates that the amplitude is A1, the motion vector difference is (-A1, 0); And if the direction information is determined to indicate an upward direction and the amplitude information indicates that the amplitude is Au, the motion vector difference is (0, Au). 5. The method of claim 1, wherein determining the first pixel position prediction value based on the first prediction mode of the current block and determining the second pixel position prediction value based on the second prediction mode of the current block includes: analyzing the first flag information from the encoded bit stream of the current block; And, if it is determined that the first flag information indicates that there is no overlap of the motion vector difference with the first source motion vector, selecting one possible motion information from the motion compensation candidate list as the first target motion information of the current block; And determining a first pixel position prediction value based on the first target motion information; And analyzing second flag information from the encoded bitstream of the current block; And, if it is determined that the second flag information indicates that the motion vector difference does not overlap the second source motion vector, selecting other possible motion information from the motion compensation candidate list as the second target motion information of the current block; And determining a second pixel position prediction value based on the second target motion information. 6. The method of claim 1, wherein before determining a target pixel position weight value based on a reference weight value associated with a surrounding corresponding position, the method further includes: configuring reference weights for surrounding positions outside the current block, wherein the reference weight values of the surrounding positions outside the current block are configured based on the weight configuration parameters, and the weight configuration parameters include a weight conversion factor and a weight conversion start position, wherein the starting position of the weight transformation is determined by at least one of the following parameters: a weighted prediction angle of the current block, a weighted prediction position of the current block, or a size of the current block. 7. The method according to claim 6, in which surrounding positions outside the current block contain surrounding positions one row above the current block, or surrounding positions one column to the left of the current block, wherein the number of surrounding positions outside the current block is determined based on the size of the current block and/or the weighted prediction angle of the current block, and the reference weights of surrounding positions outside the current block are monotonically increased or monotonically decreased. 8. The method according to claim 6, in which the reference weights of the surrounding positions outside the current block include one or more reference weights of the target positions, one or more reference weights of the first adjacent positions of the target positions, and one or more reference weights of the second adjacent positions of the target positions, wherein all of the one or more reference weights of the first adjacent positions are second reference weights, all of the one or more reference weights of the second adjacent positions are third reference weights, and the second reference weights are different from the third reference weights; the target positions include one reference weight value or at least two reference weight values; And, if it is determined that the target positions include at least two reference weights, the at least two reference weights of the target positions are monotonically increased or monotonically decreased. 9. Method according to any one of paragraphs. 1-8, in which The weighted prediction angle of the current block is a horizontal angle; or The weighted prediction angle of the current block is a vertical angle; or the absolute value of the weighted prediction angle slope of the current block is equal to the nth power of 2, where n is an integer. 10. Method according to any one of paragraphs. 1-8, wherein surrounding positions outside the current block include one or more whole pixel positions, or one or more subpixel positions, or both one or more whole pixel positions and one or more subpixel positions; wherein determining a target weight value of a pixel position based on a reference weight value associated with a surrounding corresponding position includes: if it is determined that the surrounding corresponding position is an integer pixel position, and the integer pixel position is set with a reference weight value, determining a target pixel position weight value based on the reference integer pixel position weight value; And, if it is determined that the surrounding corresponding position is a subpixel position, and the subpixel position is set with a reference weight value, determining a target pixel position weight value based on the reference weight value of the subpixel position. 11. A decoding device used on the decoding side and containing: an acquiring module configured to obtain a weighted prediction angle of the current block when it is determined that weighted prediction should be enabled for the current block; a first determination module configured to determine, for each pixel position of the current block, a surrounding corresponding position indicated by the pixel position from surrounding positions outside the current block based on the weighted prediction angle; a second determination module configured to determine a target pixel position weight value based on a reference weight value associated with a surrounding corresponding position, and determine an associated pixel position weight value based on the target pixel position weight value; a third determination module configured, for each pixel position of the current block, to determine a first pixel position prediction value based on the first prediction mode of the current block, to determine a second pixel position prediction value based on the second prediction mode of the current block; and determining a weighted pixel position prediction value based on the first prediction value, the target weight value, the second prediction value, and the associated weight value; And an encoding and decoding module configured to determine weighted prediction values of the current block based on the weighted prediction values of all pixel positions of the current block; wherein the first prediction mode is an inter prediction mode, the second prediction mode is an inter prediction mode, and the third determination module is also configured to: creating a list of candidates for motion compensation, wherein the list of candidates for motion compensation contains at least two information about possible motion, wherein, when determining the first pixel position prediction value based on the first prediction mode of the current block and determining the second pixel position prediction value based on the second prediction mode of the current block, the third determination module is configured to: analyzing the first flag information from the encoded bit stream of the current block and, if it is determined that the first flag information indicates the superposition of a motion vector difference on the first original motion vector, selecting one possible motion information from the candidate list for motion compensation as the first original motion information current block; determining first target motion information of the current block based on the first source motion information of the current block; and determining a first pixel position prediction value based on the first target motion information; And analyzing the second flag information from the encoded bit stream of the current block and, if determined that the second flag information indicates an overlap of the motion vector difference with the second original motion vector, selecting other possible motion information from the candidate list for motion compensation as the second original motion information current block; determining second target motion information of the current block based on the second source motion information of the current block; and determining a second pixel position prediction value based on the second target motion information. 12. The device according to claim 11, in which the first motion source information contains a first motion source vector, the first motion target information contains a first motion target vector, and, when determining the first motion target information of the current block based on the first motion source information, the third determining module is configured to: obtaining a motion vector difference corresponding to the first initial motion vector; And determining a first target motion vector based on a difference of motion vectors corresponding to the first source motion vector and the first source motion vector; wherein the second source motion information contains a second source motion vector, the second target motion information contains a second target motion vector, and, when determining the second target motion information of the current block based on the second source motion information, the third determination module is configured to: obtaining a motion vector difference corresponding to the second original motion vector; And determining a second target motion vector based on a difference of motion vectors corresponding to the second source motion vector and the second source motion vector. 13. The device according to claim 12, in which, upon receiving the difference of motion vectors corresponding to the first initial motion vector, the third determination module is configured to: analyzing direction information and amplitude information of a motion vector difference corresponding to the first original motion vector from the encoded bit stream of the current block; And determining a motion vector difference corresponding to the first original motion vector based on the direction information and the amplitude information of the motion vector difference corresponding to the first original motion vector, and, upon receiving the difference of motion vectors corresponding to the second initial motion vector, the third determination module is configured to: analyzing direction information and amplitude information of a motion vector difference corresponding to the second original motion vector from the encoded bitstream of the current block; And determining a motion vector difference corresponding to the second original motion vector based on the direction information and the amplitude information of the motion vector difference corresponding to the second original motion vector. 14. The device according to claim 13, in which, if it is determined that the direction information indicates the direction to the right and the amplitude information indicates that the amplitude is Ar, the motion vector difference is (Ar, 0); if it is determined that the direction information indicates a downward direction and the amplitude information indicates that the amplitude is Ad, the motion vector difference is (0, -Ad); if it is determined that the direction information indicates the left direction and the amplitude information indicates that the amplitude is Al, the motion vector difference is (-Al, 0); And if the direction information is determined to indicate an upward direction and the amplitude information indicates that the amplitude is Au, the motion vector difference is (0, Au). 15. The apparatus of claim 11, wherein, when determining the first pixel position prediction value based on the first prediction mode of the current block and determining the second pixel position prediction value based on the second prediction mode of the current block, the third determination module is configured to: analyzing the first flag information from the encoded bit stream of the current block; And, if it is determined that the first flag information indicates that the motion vector difference does not overlap with the first source motion vector, selecting one possible motion information from the motion compensation candidate list as the first target motion information of the current block; And determining a first pixel position prediction value based on the first target motion information; And analyzing second flag information from the encoded bitstream of the current block; And, if it is determined that the second flag information indicates that the motion vector difference does not overlap with the second source motion vector, selecting other possible motion information from the motion compensation candidate list as the second target motion information of the current block; And determining a second pixel position prediction value based on the second target motion information. 16. The device according to claim 11, in which the second determination module is also configured to: configuring reference weights for surrounding positions outside the current block, wherein the reference weight values of the surrounding positions outside the current block are configured based on the weight configuration parameters, and the weight configuration parameters include the weight conversion factor and the initial weight conversion position, wherein the starting position of the weight transformation is determined by at least one of the following parameters: a weighted prediction angle of the current block, a weighted prediction position of the current block, or a size of the current block. 17. The device according to claim 16, in which surrounding positions outside the current block contain surrounding positions one row above the current block, or surrounding positions one column to the left of the current block, wherein the number of surrounding positions outside the current block is determined based on the size of the current block and/or the weighted prediction angle of the current block, and the reference weights of surrounding positions outside the current block are monotonically increased or monotonically decreased. 18. The device according to claim 16, in which the reference weights of the surrounding positions outside the current block include one or more reference weights of the target positions, one or more reference weights of the first adjacent positions of the target positions, and one or more reference weights of the second adjacent positions of the target positions, wherein all of the one or more reference weights of the first adjacent positions are second reference weights, all of the one or more reference weights of the second adjacent positions are third reference weights, and the second reference weights are different from the third reference weights; the target positions include one reference weight value or at least two reference weight values; And, if it is determined that the target positions include at least two reference weights, the at least two reference weights of the target positions are monotonically increased or monotonically decreased. 19. The device according to any one of paragraphs. 11-18, in which The weighted prediction angle of the current block is a horizontal angle; or The weighted prediction angle of the current block is a vertical angle; or the absolute value of the weighted prediction angle slope of the current block is equal to the nth power of 2, where n is an integer. 20. The device according to any one of paragraphs. 11-18, wherein the surrounding positions outside the current block include one or more whole pixel positions, or one or more subpixel positions, or both one or more whole pixel positions and one or more subpixel positions; wherein, when determining the target weight value of the pixel position based on the reference weight value associated with the surrounding corresponding position, the second determining module is configured to: if it is determined that the surrounding corresponding position is an integer pixel position, and the integer pixel position is set with a reference weight value, determining a target pixel position weight value based on the reference integer pixel position weight value; And, if it is determined that the surrounding corresponding position is a subpixel position, and the subpixel position is set with a reference weight value, determining a target pixel position weight value based on the reference subpixel position weight value. 21. A decoding device comprising: processor and machine readable storage medium, wherein the computer-readable storage medium stores computer-readable instructions executable by the processor for implementing the method according to any one of claims. 1-10. 22. A computer-readable storage medium that stores machine-readable instructions executable by a processor to implement the method of any one of claims. 1-10.