RU2809619C1 - Method, equipment and device for encoding and decoding - Google Patents

Abstract

FIELD: video encoding and decoding.

SUBSTANCE: result is achieved by configuring weight values, in which a suitable target weight value is configured for each pixel position of the current block, so that the prediction values of the current block are closer to the source pixels, which improves the prediction accuracy, prediction efficiency, and video encoding and decoding efficiency.

EFFECT: increase of efficiency of video encoding/decoding.

21 cl, 23 dwg, 6 tbl

Description

TECHNICAL FIELD

[01] The present invention relates to encoding and decoding technologies, in particular to encoding and decoding methods and equipment, encoder-side devices and decoder-side devices.

PREREQUISITES FOR CREATION OF THE INVENTION

[02] To reduce storage space, video or images are transmitted after encoding. The complete video encoding process may include processes such as prediction, transformation, quantization, entropy encoding, filtering, etc. Prediction may include internal prediction and external prediction. Inter-prediction refers to the operation of using video temporal correlation to predict current pixels using the pixels of a neighboring encoded image to achieve efficient reduction of video temporal redundancy. Intra prediction refers to the operation of using video spatial correlation to predict current pixels using pixels of one or more coded blocks of the current image to achieve efficient reduction of video spatial redundancy.

SUMMARY OF THE INVENTION

[03] In view of the above, the present application discloses encoding and decoding methods and equipment, encoder-side devices and decoder-side devices that can improve prediction accuracy.

[04] The present application discloses an encoding and decoding method including: when it is determined that weighted prediction should be enabled for a current block, obtaining a weighted prediction angle and weight configuration parameters of the current block, wherein the weight configuration parameters include a weight conversion factor and a weight conversion starting position ; configuring reference weight values for surrounding positions outside the current block in accordance with the parameters of the weight configuration; 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 pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[05] The present application discloses encoding and decoding equipment comprising: an acquisition module configured to obtain a weighted prediction angle and weight configuration parameters of a current block when it is determined that weighted prediction should be enabled for the current block; wherein the parameters of the weight configuration include the weight conversion factor and the initial position of the weight conversion; a configuration module configured to configure reference weight values for surrounding positions outside the current block in accordance with the parameters of the weight configuration; a determination module configured to determine, for each pixel position of the current block, surrounding a corresponding position indicated by the pixel position, from surrounding positions outside the current block based on the weighted prediction angle; determining a target pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[06] This application discloses a decoder-side apparatus comprising: a processor and a computer-readable storage medium on which computer-readable instructions executable by the processor are stored, and the processor is configured to execute the computer-readable instructions to do the following: when it is determined that weighted prediction should be enabled for a current block , obtaining the weighted prediction angle and weight configuration parameters of the current block; wherein the parameters of the weight configuration include the weight conversion factor and the initial position of the weight conversion; configuring reference weight values for surrounding positions outside the current block in accordance with the parameters of the weight configuration; 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 pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[07] This application discloses an encoder-side apparatus comprising: a processor and a computer-readable storage medium on which computer-readable instructions executable by the processor are stored, and the processor is configured to execute the computer-readable instructions to do the following: when it is determined that weighted prediction should be enabled for a current block , obtaining the weighted prediction angle and weight configuration parameters of the current block; wherein the parameters of the weight configuration include the weight conversion factor and the initial position of the weight conversion; configuring reference weight values for surrounding positions outside the current block in accordance with the parameters of the weight configuration; 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 pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[08] As described in the above technical solutions, embodiments of the present invention provide an efficient method for configuring weight values, in which a suitable target weight value is configured for each pixel position of the current block, so that the prediction values of the current block are more similar to the source pixels, which improves prediction accuracy, prediction efficiency and coding efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

[09] FIG. 1 is a diagram of the structure of a video encoding system.

[10] FIG. 2A-2C are schematic diagrams of weighted prediction.

[11] FIG. 3 is a flowchart illustrating an encoding and decoding method according to an embodiment of the present invention.

[12] FIG. 4A is a flowchart illustrating an encoding method according to an embodiment of the present invention.

[13] FIG. 4B-4E are schematic diagrams illustrating surrounding positions outside the current block.

[14] FIG. 4F is a flowchart illustrating a decoding method according to an embodiment of the present invention.

[15] FIG. 5 is a schematic diagram illustrating a weighted prediction angle according to an embodiment of the present invention.

[16] FIG. 6 is a schematic diagram of weight reference values for four weight conversion coefficients according to an embodiment of the present invention.

[17] FIG. 7A is a flowchart of obtaining a weight array according to an embodiment of the present invention.

[18] FIG. 7B to 7D are schematic diagrams of angle and weighted prediction regions according to an embodiment of the present invention.

[19] FIG. 8A and FIG. 8B are schematic diagrams of the SCC sequence and the natural sequence.

[20] FIG. 9 is a schematic diagram illustrating adjacent blocks of a current block in accordance with an embodiment of the present invention.

[21] FIG. 10A is a block diagram illustrating encoding and decoding equipment according to an embodiment of the present invention.

[22] FIG. 10B is a diagram of a hardware structure of a decoder-side device according to an embodiment of the present invention.

[23] FIG. 10C is a diagram of a hardware structure of an encoder-side device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF OPTIONS FOR IMPLEMENTING THE INVENTION

[24] The terms used herein are intended only to describe a particular embodiment of the invention and not to limit the present invention. The singular forms used in this specification and the accompanying claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the combination “and/or” as used herein refers to any or all possible combinations that include one or more related listed elements. It should be noted that although the terms “first”, “second”, “third”, etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are used only to distinguish one category of information from another. For example, within the spirit of the present invention, the first information may be referred to as the second information; and, similarly, the second information may also be referred to as the first information, depending on the context. Additionally, the word "if" used here can mean "when" or "after" or "in response to a determination."

[25] The present invention provides methods, equipment and devices for encoding and decoding, for which the following concepts can be used: intra prediction, inter prediction, intra block copy prediction (IBC, Intra Block Copy), etc.

[26] Intra prediction predicts a pixel of the current block using pixels of one or more encoded blocks of the current image based on the spatial correlation of the video to eliminate the spatial redundancy of the video. Internal prediction defines several prediction modes, each of which corresponds to one texture direction (with the exception of DC (Direct Current) mode). For example, if the image texture follows the horizontal direction, using the horizontal prediction mode can better predict image information.

[27] Inter-prediction uses the pixels of neighboring encoded images to predict the pixels of the current image based on the temporal correlation of the video due to the strong temporal correlation included in the video sequence to effectively reduce the temporal redundancy of the video.

[28] Intra-block copying allows the same slice to be referenced if the current block's reference data comes from the same slice. In intra-block copy technology, the prediction value of the current block can be obtained using the block vector of the current block. For example, based on the characteristic that there are a large number of repeating textures in the same slice in the screen content, when the prediction value of the current block is obtained using a block vector, the compression efficiency of the screen content sequence can be improved.

[29] A prediction pixel refers to a pixel value obtained from an encoded/decoded pixel, and a residual is obtained based on the difference between the original pixel and the prediction pixel, and then transform, quantization, and coding of the residual coefficients are performed. The inter-prediction pixel for the current block refers to the pixel value obtained from the reference image, and since the pixel positions are discrete, an interpolation operation is required to obtain the final prediction pixel. The closer the prediction pixel is to the original pixel, the smaller the residual energy obtained by performing subtraction on both pixels, and the higher the coding compression efficiency.

[30] Motion Vector (MB, Motion Vector). In external prediction, a motion vector is used to represent the relative displacement between the current block of the current slice and the reference block of the reference slice. Each of the divided blocks has a corresponding motion vector that must be transmitted to the decoder side. If the motion vector of each block is encoded and transmitted independently, especially if there are many smaller blocks, more bits must be used. To reduce the number of bits used to encode the motion vector, spatial correlation between adjacent blocks can be used to predict the motion vector of the current block based on the motion vector(s) of the adjacent encoded block(s), and then the prediction difference is encoded. In this way, the number of bits representing motion vectors can be effectively reduced. In the process of encoding the motion vector of the current block, first, one or more motion vectors of one or more adjacent blocks to be encoded are used to predict the motion vector of the current block, and then the motion vector difference (MVD) between the motion vector prediction value (MVP) is encoded. Prediction) and the real value of the motion vector estimate.

[31] Traffic information. Since the motion vector represents the position offset from the current block to the reference block, to accurately obtain information about the specified block, in addition to the motion vector, reference image index information is also needed to indicate which reference image is used for the current block. In a video encoding technology, a reference picture list may be set for the current slice, and the reference picture index information indicates which reference picture specified in the reference picture list is used for the current block. In addition, many encoding technologies also support multiple reference picture lists, so that an index may also be used to indicate which reference picture list is used, and this index may be referred to as a reference direction. To summarize, in video encoding technology, motion-related information such as motion vector, reference image index information, and reference direction may be collectively referred to as motion information.

[32] Block vector (BV) is used in intra-block copy technology, which uses the block vector to compensate for motion, for example, the prediction value of the current block is obtained using the block vector. The block vector represents the relative displacement between the current block and the best matching block of the coded blocks of the current slice and is different from the motion vector. Based on the characteristic of having a large number of repeated textures in the same slice, when the prediction value of the current block is obtained using the block vector, the compression efficiency can be improved.

[33] Intra prediction mode. In intra prediction, the intra prediction mode is used to perform motion compensation, for example, the prediction value of the current block is obtained using the intra prediction mode. For example, an intra prediction mode may include, but is not limited to, a planar mode, a DC mode, and a plurality of angular modes. Planar mode is applied to the region in which the pixel values change slowly, and uses two linear filters in the horizontal and vertical directions to obtain the average of the pixels in the two directions as the pixel prediction value of the current block. DC mode applies to a large flat surface and takes the average value of the current block's surrounding pixels as the current block's prediction value. Angle modes include 33 angle modes or 65 angle modes.

[34] Palette mode. In palette mode, the pixel values of the current block are represented by a small set of pixel values, that is, a palette. When the pixel value of a pixel position in the current block is close to a color in the palette, the pixel position is encoded by the index value of the corresponding color in the palette. When the pixel value of a pixel position in the current block is not similar to all the colors in the palette, the pixel position must be encoded using an escape pixel, and the escape pixel is directly quantized and then encoded into a bitstream. At the decoder side, one palette is first obtained, for example, a palette storing {color A, color B, color C}, and then determines whether each pixel position is encoded as an escaped pixel. If the pixel position is not a runaway pixel, the pixel position index is obtained from the bitstream, and then the color based on the pixel position index is obtained from the palette and assigned to the pixel position; otherwise, the “escaped” pixel is analyzed.

[35] Rate-Distortion Optimization (RDO). There are two metrics to evaluate encoding efficiency: bit rate and Peak Signal to Noise Ratio (PSNR). The smaller the bit stream, the higher the compression ratio; and the higher the PSNR, the better the quality of the reconstructed image. When choosing a mode, the decision method is actually a comprehensive assessment for both modes. For example, the cost corresponding to the mode can be calculated using the following formula: where D represents the distortion, usually measured by the sum of squared errors (SSE, Sum of Squared Errors), and SSE refers to the average sum of squared differences between the reconstructed image block and the original image; X represents the Lagrange multiplier; and R represents the actual number of bits required to encode an image block in this mode, including the total number of bits required for encoding mode information, motion information, residuals, and the like. In mode selection, if RDO is used to make a comparative decision about encoding modes, the best encoding efficiency can usually be guaranteed.

[36] Video coding system structure. The structure of the video encoding system shown in FIG. 1 can be used to perform an encoder-side process in embodiments of the present invention, and the structure of the video decoding system is similar to FIG. 1 will not be repeated here either. The structure of a video decoding system may be used to perform a decoder-side process in embodiments of the present invention. For example, the video encoding system structure and the video decoding system structure may include, but are not limited to, an intra prediction module or an inter prediction module, a motion estimation/compensation module, a reference picture buffer, an in-loop filtering module, a reconstruction module, a transform module, a quantization module, a inverse conversion, dequantization module, entropy encoder, etc. An encoder can execute an encoder-side process through the interaction of these modules, and a decoder can execute a decoder-side process through the interaction of these modules.

[37] For example, the current block may be rectangular, while the boundary of an object is usually not rectangular in practical situations. Therefore, the boundary of an object usually uses two different entities (for example, an object represented in the foreground and in the background, etc.). When the motions of two objects are inconsistent, the two objects cannot be separated well based on rectangular separation. Therefore, the current block can be divided into two non-rectangular sub-blocks, and a weighted prediction is performed on the two non-rectangular sub-blocks. For example, weighted prediction is designed to perform a weighted operation based on multiple prediction values to obtain one or more final prediction values. The weighted prediction may include: combined inter/intra prediction, combined inter/intra prediction, combined intra/intra prediction, etc. For weighted prediction weight(s), the same weight value or different weight values may be set for all pixel positions of the current block.

[38] FIG. 2A is a schematic diagram illustrating the Triangular Partition Mode (TPM) of external weighted prediction.

[39] The TPM prediction block is obtained by combining the inter prediction block 1 (for example, the inter prediction value 1 for several pixel positions is obtained using the inter prediction mode 1) and the inter prediction block 2 (for example, the inter prediction value 2 for several pixel positions is obtained using external prediction mode 2). The TPM prediction block may be divided into two areas/parts, one of which may be inter prediction area 1 and the other may be inter prediction area 2. The TPM prediction block may be rectangular, and the two inter prediction regions of the TPM prediction block may be non-rectangular, and the boundary line between the two inter prediction regions (as shown by the dashed line in FIG. 2A) may be a main diagonal or sub-diagonal of the TPM prediction block.

[40] The position of each pixel in the inter prediction region 1 is mainly determined based on the inter prediction value 1 of the inter prediction block 1. For example, the inter prediction value 1 of the pixel position inter prediction unit 1 and the inter prediction value 2 of the inter prediction unit 2 of the pixel position are weighted to obtain a combined pixel position prediction value, where the inter prediction value 1 has a larger weight and the inter prediction value 2 has a smaller weight. value or even 0. Each pixel position of the inter prediction region 2 is mainly determined based on the inter prediction value 2 of the inter prediction block 2. For example, the inter prediction value 1 of the pixel position inter prediction unit 1 and the inter prediction value 2 of the inter prediction unit 2 of the pixel position are weighted to obtain a combined pixel position prediction value, where the inter prediction value 2 has a larger weight and the inter prediction value 1 has a smaller weight. weight value or even 0. Finally, the combined pixel position prediction values are combined to form a TPM prediction block.

[41] FIG. 2B is a schematic diagram illustrating the Geometrical (GEO) mode for the interblock mode. GEO mode is used to divide an inter prediction block into two sub-blocks using a single dividing line. In GEO mode there can be more separation directions compared to TPM mode. The GEO mode is similar to the TPM mode in the weighted prediction process.

[42] The GEO prediction block is obtained by combining the inter prediction block 1 (for example, the inter prediction value 1 for multiple pixel positions is obtained using inter prediction mode 1) and the inter prediction block 2 (for example, the inter prediction value 2 for multiple pixel positions is obtained using using inter prediction mode 2). The GEO prediction block may be divided into two regions/parts, one of which may be inter prediction region 1 and the other may be inter prediction region 2.

[43] The position of each pixel in the inter prediction region 1 is mainly determined based on the inter prediction value 1 of the inter prediction block 1. For example, when the inter prediction value 1 of the pixel position inter prediction unit 1 and the inter prediction value 2 of the pixel position inter prediction unit 2 are weighted, the inter prediction value 1 has a larger weight value and the inter prediction value 2 has a smaller weight value. Each pixel position of the inter prediction region 2 is mainly determined based on the inter prediction value 2 of the inter prediction block 2. For example, when the inter prediction value 1 of the pixel position inter prediction unit 1 and the inter prediction value 2 of the pixel position inter prediction unit 2 are weighted, the inter prediction value 2 has a larger weight value and the inter prediction value 1 has a smaller weight value.

[44] For example, the weights of the GEO prediction block are configured taking into account the distance of the pixel position from the dividing line. As shown in FIG. 2C, pixel position A, pixel position B, and pixel position C are located at the lower right of the dividing line, and pixel position D, pixel position E, and pixel position F are located at the upper left of the dividing line. For pixel position A, pixel position B, and pixel position C, the weight values of the inter prediction block 2 are ranked as B≥A≥C, and the weight values of the inter prediction block 1 are ranked as C≥A≥B. For pixel position D, pixel position E, and pixel position F, the weight values of the inter prediction block 1 are ranked as D≥F≥E, and the weight values of the inter prediction block 2 are ranked as E≥F≥D. The above method requires calculating the distance between the pixel position and the dividing line, and then determining the weight value of the pixel position.

[45] In the above examples, to achieve weighted prediction, it is expected that one or more weight values of a prediction block corresponding to each pixel position of the current block are determined, and weighted prediction is performed based on one or more weight values corresponding to the pixel position. But setting one or more weight values depends on the dividing line, and unreasonably setting one or more weight values may result in poor prediction result and low coding efficiency.

[46] In view of this, embodiments of the present invention provide a method for obtaining one or more weight values. Thus, based on the reference weight values of surrounding positions outside the current block, a target weight value for each pixel position of the current block is determined, such that a more suitable target weight value can be configured for each pixel position. In this case, the prediction values can be more close to the original pixels, which improves the prediction accuracy, prediction efficiency, and coding efficiency.

[47] The encoding and decoding method according to embodiments of the present invention will be described in detail below in combination with several specific embodiments of the invention.

[48] Embodiment 1 of the invention. Fig. 3 is a flowchart illustrating an encoding and decoding method. The method may be applied on the decoder side (which may also be called a video decoder) or on the encoder side (which may also be called a video encoder). The method includes the following steps.

[49] At step 301, when it is determined that weighted prediction should be enabled for the current block, the weighted prediction angle and weight configuration parameters of the current block are obtained, wherein the weight configuration parameters include a weight conversion factor and a weight conversion starting position. The starting position of the weight transformation may be 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.

[50] For example, when a prediction is expected to be made for the current block, the decoder side or the encoder side first determines whether to allow a weighted prediction for the current block. If it is determined that weighted prediction should be enabled for the current block, the encoding and decoding method of embodiments of the present invention is applied, that is, step 301 and subsequent steps are performed. If it is determined that weighted prediction should not be enabled for the current block, no restrictions are made on the corresponding implementations in embodiments of the present invention.

[51] For example, when it is determined that weighted prediction should be enabled for the current block, the weighted prediction angle of the current block, the weighted prediction position of the current block, and the weight conversion factor of the current block can be obtained. Then, based on at least one of the weighted prediction angle of the current block, the weighted prediction position of the current block, or the size of the current block, a starting position for transforming the weights of the current block can be determined. In this way, the weighted prediction angle of the current block, the conversion coefficient of the weights of the current block, and the transformation starting position of the weights of the current block can be obtained.

[52] At step 302, reference weights for surrounding positions outside the current block are configured based on the weight configuration parameters of the current block.

[53] For example, the number of surrounding positions outside the current block may be determined based on the size of the current block and/or the weighted prediction angle of the current block. For example, if the number of surrounding positions outside the current block is determined to be M, based on the size of the current block and/or the weighted prediction angle of the current block, reference weight values for the M surrounding positions are configured in accordance with the weight configuration parameters of the current block.

[54] For example, the reference weights of surrounding positions outside the current block may increase monotonically; or the reference weights of surrounding positions outside the current block may decrease monotonically. For example, the reference weights of surrounding positions outside the current block could be 0 0... 0 0 2 4 6 8 8... 8 8, or the reference weights of surrounding positions outside the current block could be 8 8... 8 8 6 4 2 0 0... 0 0.

[55] For example, surrounding positions outside the current block may include whole pixel positions or subpixel positions, or both whole pixel positions and subpixel positions. Surrounding positions outside the current block may include, but is not limited to, surrounding positions in the row above the current block, or surrounding positions in the column to the left of the current block, or surrounding positions in the row below the current block, or surrounding positions in the column to the right of the current block. block. The above were only examples of surrounding positions that do not impose any restrictions.

[56] In an exemplary embodiment of the invention, the reference weights of the surrounding positions outside the current block include one or more reference weights of the target positions (regions), one or more reference weights of the first adjacent positions (regions) of the target positions, and one or more reference weights values of the second neighboring positions (areas) of the target positions. That is, surrounding positions outside the current block can be divided into target positions, first adjacent positions of target positions, and second adjacent positions of target positions.

[57] For example, all reference weights of the first adjacent positions are the first reference weight, and the reference weights of the second adjacent positions increase monotonically. Alternatively, all reference weight values of the first adjacent positions are the first reference weight value, and the reference weight values of the second adjacent positions decrease monotonically. Alternatively, all reference weights of the first adjacent positions are a second reference weight, and all reference weights of the second adjacent positions are a third reference weight, wherein the second reference weight is different from the third reference weight. Alternatively, the reference weight values of the first adjacent positions increase monotonically, and the reference weight values of the second adjacent positions increase monotonically. Alternatively, the reference weight values of the first adjacent positions are monotonically decreased, and the reference weight values of the second adjacent positions are monotonically decreased.

[58] For example, the target positions include one or at least two reference weights, and if the target positions include at least two reference weights, the at least two reference weights of the target positions increase or decrease monotonically.

[59] In step 303, for each pixel position of the current block, a surrounding corresponding position indicated by the pixel position is determined from surrounding positions outside the current block based on the weighted prediction angle of the current block; determining a target weight value of the pixel position based on a reference weight value associated with a surrounding corresponding position; and determining an associated pixel position weight value based on the target pixel position weight value.

[60] For example, the weighted prediction angle refers to the angular direction indicated by the pixel position inside the current block, for example, based on the determined weighted prediction angle, the angular direction corresponding to the weighted prediction angle points to the surrounding position outside the current block. Based on this, for each pixel position of the current block, the angular direction indicated by the pixel position is determined based on the weighted prediction angle, and then the surrounding corresponding position indicated by the pixel position is determined from the surrounding positions outside the current block based on the angular direction.

[61] For each pixel position of the current block, after the surrounding corresponding position indicated by the pixel position is determined based on the reference weight value associated with the surrounding corresponding position, a target pixel position weight value is determined, for example, a reference weight value associated with the surrounding corresponding position, can be defined as the target pixel weight value. An associated pixel position weight value can then be determined based on the target pixel position weight value. For example, for each pixel position, the sum of the target weight value and the associated weight value for the pixel position may be a fixed predetermined value. Therefore, the associated weight value may be the difference between the predetermined value and the target weight value. Assuming that the preset value is 8 and the target pixel position weight value is 0, the associated pixel position weight value is 8; if the target pixel position weight value is 1, the associated pixel position weight value is 7, etc., provided that the sum of the target weight value and the associated weight value is 8.

[62] At step 304, for each pixel position of the current block, a first pixel position prediction value is determined based on the first prediction mode of the current block, a second pixel position prediction value is determined based on the second prediction mode of the current block; and based on the first prediction value, the target weight value, the second prediction value and the associated weight value, determining a weighted pixel position prediction value.

[63] For example, if the target weight value is a weight value corresponding to the first prediction mode, and the associated weight value is a weight value corresponding to the second prediction mode, the weighted pixel position prediction value may be as follows: (first pixel position prediction value * target pixel position weight value+second pixel position prediction value * associated pixel position weight value) / fixed preset value.

[64] In addition, if the target weight value is a weight value corresponding to the second prediction mode, and the associated weight value is a weight value corresponding to the first prediction mode, the weighted pixel position prediction value may be as follows: (second pixel position prediction value * target pixel position weight value + first pixel position prediction value * associated pixel position weight value) / fixed preset value.

[65] At step 305, the weighted prediction values of the current block are determined based on the weighted prediction values of all pixel positions in the current block.

[66] For example, weighted prediction values of all pixel positions of the current block are formed into weighted prediction values of the current block.

[67] As described in the technical solutions presented above, embodiments of the present invention provide an efficient method for configuring weight values, in which an appropriate target weight value is configured for each pixel position of the current block, so that the prediction values of the current block are more similar to the source pixels, which improves the prediction accuracy, prediction efficiency and coding efficiency.

[68] Embodiment 2 of the invention. Based on Embodiment 1, another encoding and decoding method is provided in the embodiments of the invention, as shown in FIG. 4A, which is a schematic diagram illustrating a flowchart of an encoding and decoding method. The method can be applied on the encoder side and includes the following steps.

[69] At step 401, when it is determined that weighted prediction should be enabled for the current block, the encoder side obtains the weighted prediction angle of the current block, the weighted prediction position of the current block, and the weight conversion factor of the current block. For example, the encoder side determines whether weighted prediction should be enabled for the current block. If the encoder side determines that weighted prediction should be enabled for the current block, step 401 and subsequent steps are performed, otherwise the processing method is not limited to the present invention.

[70] In an exemplary implementation, if the current block satisfies a condition for enabling weighted prediction, the encoder side may determine that weighted prediction should be enabled for the current block. If the current block does not satisfy the weighted prediction enable condition, it may be determined that weighted prediction should not be enabled for the current block. For example, the encoder side can determine whether the characteristics information of the current block satisfies a certain condition. If the characteristic information of the current block satisfies a certain condition, it is determined that weighted prediction should be enabled for the current block, and if not, it is determined that weighted prediction should not be enabled for the current block. For example, the performance information includes, but is not limited to, one or more of the following: the type of the current slice in which the current block is located, information about the size of the current block, and switch control information. The switching control information may include, but is not limited to: sequence level switching control information (eg, Sequence Parameter Set and SH, Sequence Header), picture level switching control information (eg, picture parameter set). (PPS, Picture Parameter Set) and picture header (PH, Picture Header), slice level switching control information (for example, slice, tile and patch) or largest coding unit level switching control information (for example, LCU, Largest Coding Unit) and Coding Tree Unit (CTU), or block level switching control information (eg, Coding Unit (CU), Prediction Unit (PU), Transform Unit (TU)).

[71] For example, if the characteristic information is the type of the current slice in which the current block is located, the type of the current slice in which the current block satisfying a certain condition is located includes, but is not limited to, the following: if the type of the current slice in which the current block is located, is a B-slice, determine that the slice type satisfies a certain condition; or, if the type of the current slice in which the current block is located is an I-slice, determine that the slice type satisfies a certain condition.

[72] For example, if the characteristic information is information about the size of the current block, such as the width and height of the current block, information about the size of the current block that satisfies a certain condition includes, but is not limited to, the following: if the width is greater than or equal to the first value width and the height is greater than or equal to the second height value, determine that the size information of the current block satisfies a certain condition; or, if the width is greater than or equal to a third width value, the height is greater than or equal to a fourth height value, the width is less than or equal to a fifth width value, and the height is less than or equal to a sixth height value, determining that the size information of the current block satisfies a certain condition; or if the product of the width and height is greater than or equal to the product value, it is determined that the size information of the current block satisfies a certain condition. The above values can be configured based on experience, for example, configured as 8, 16, 32, 64 or 128 and the like. For example, the first width value could be 8, the second height value could be 8, the third width value could be 8, the fourth height value could be 8, the fifth width value could be 64, the sixth height value could be 64, and the product value could be 64 In this case, if the width is greater than or equal to 8 and the height is greater than or equal to 8, it is determined that the size information of the current block satisfies a certain condition; or, if the width is greater than or equal to 8, the height is greater than or equal to 8, the width is less than or equal to 64, and the height is less than or equal to 64, determining that the size information of the current block satisfies a certain condition; or, if the product of the width and height is greater than or equal to 64, determining that the size information of the current block satisfies a certain condition. The above examples are illustrative only and do not limit the present invention.

[73] For example, if the characteristic information is information about the size of the current block, such as the width and height of the current block, the size information of the current block that satisfies a certain condition includes, but is not limited to, the following: the width is not less than a and not more than b, the height is not less than a and not greater than b, where a can be less than or equal to 16, and b can be greater than or equal to 16. For example, a is 8, and b is 64 or 32.

[74] For example, if the performance information is switching control information, the switching control information satisfying a certain condition includes, but is not limited to, the following: if the switching control information allows weighted prediction for the current block, it is determined that the switching control information satisfies a certain condition.

[75] For example, if the characteristics information is the type of the current slice in which the current block is located and the size information of the current block, when the slice type satisfies a certain condition and the size information satisfies a certain condition, it is determined that the characteristics information of the current block satisfies a certain condition. Alternatively, if the characteristic information represents the type of the current slice in which the current block is located, and the switching control information, when the slice type satisfies the certain condition and the switching control information satisfies the certain condition, it is determined that the characteristic information of the current block satisfies the certain condition. Alternatively, if the characteristics information is size information of the current block and switching control information, when the size information satisfies a certain condition and the switching control information satisfies the certain condition, it is determined that the characteristics information of the current block satisfies the certain condition. Alternatively, if the characteristic information is the type of the current slice in which the current block is located, the size information of the current block and the switching control information, when the slice type, the size information and the switching control information satisfy certain conditions, respectively, it is determined that the characteristic information current block satisfies a certain condition.

[76] In an exemplary implementation, when it is determined that weighted prediction should be enabled for the current block, the encoder side may obtain the weighted prediction angle of the current block, the weighted prediction position of the current block, and the weight conversion factor of the current block.

[77] For example, the weighted prediction angle refers to the angular direction indicated by the pixel position within the current block. As shown in FIG. 4B, based on the weighted prediction angle, the angular direction indicated by a pixel position (eg, 1 pixel position, 2 pixel position, and 3 pixel position) inside the current block is shown, with the angular direction indicating a surrounding position outside the current block. As shown in FIG. 4C, based on another weighted prediction angle, the angular direction indicated by a pixel position (eg, pixel position 2, pixel position 3, and pixel position 4) inside the current block is shown, with the angular direction indicating a surrounding position outside the current block.

[78] For example, a weighted prediction position (also called a distance parameter) is used to configure a reference weight value of a surrounding position outside the current block. For example, based on parameters such as the weighted prediction angle of the current block, the size of the current block, etc., a range of surrounding positions outside the current block (eg, the number of surrounding positions outside the current block) is determined, which is shown in FIG. 4B or 4C.

[79] The range of surrounding positions is then equally divided into N parts, where the value of N can be set arbitrarily, for example, it can be set to 4, 6 or 8, etc. Taking 8 as an example, the weighted prediction position is used to represent which surrounding position is used as the starting position of the weight transformation of the current block, so that the reference weight values of the surrounding positions outside the current block are configured based on the starting position of the weight transformation.

[80] As shown in FIG. 4D, after all surrounding positions are divided into eight equal parts, seven weighted prediction positions can be obtained. Based on this, when the weighted prediction position is 0, it may indicate that the surrounding position is a0 (that is, the surrounding position marked by the dotted line 0. In practice, the dotted line 0 does not exist, and the dotted line 0 is only used to make it easier to understand the given examples Dashed lines 0 to 6 are used to equally divide all surrounding positions into eight parts) serves as the starting position for transforming the weights of surrounding positions outside the current block. By analogy, when the weighted prediction position is 6, it means that the surrounding position a6 is used as the starting position for transforming the weights of surrounding positions outside the current block.

[81] For different weighted prediction angles, the values of N may be different. For example, for weighted prediction angle A, the value of N may be 6, indicating that the range of surrounding positions determined based on weighted prediction angle A is equally divided into six parts. For the weighted prediction angle B, the value of N may be 8, indicating that the range of surrounding positions determined based on the weighted prediction angle B is equally divided into eight parts.

[82] For different weighted prediction angles, the values of N may be the same. In the case of the same value of N, the number of weighted prediction positions may be different. For example, for weighted prediction angle A, the value of N is 8, indicating that the range of surrounding positions determined based on weighted prediction angle A is equally divided into eight parts; and for the weighted prediction angle B, the value of N is 8, indicating that the range of surrounding positions determined based on the weighted prediction angle B is equally divided into eight parts. At the same time, weighted prediction positions corresponding to weighted prediction angle A are selected from a total of five positions a1 to a5, and weighted prediction positions corresponding to weighted prediction angle B are selected from a total of seven positions b0 to b6.

[83] Above is an example of equal division of a range of surrounding positions into N parts. In practice, an unequal division method may also be adopted, for example, a range of surrounding positions may be divided into N parts rather than N equal parts, which is not limited in the present invention.

[84] Once all surrounding positions are equally divided into eight parts, seven weighted prediction positions can be obtained. At step 401, the encoder side may obtain one weighted prediction position from seven weighted prediction positions, or select some weighted prediction positions (eg, five weighted prediction positions) from seven weighted prediction positions, and then obtain one weighted prediction position from five weighted prediction positions.

[85] For example, the weight conversion factor is the conversion factor of the reference weight values of surrounding positions outside the current block, which is used to represent the rate of change of the reference weight values. The weight conversion factor can be any number other than 0, for example, the weight conversion factor can be -4, -2, -1, 1, 2, 4, 0.5, 0.75, 1.5, etc. When the absolute value of the weight conversion factor is 1, that is, when the weight conversion factor is -1 or 1, it is used to indicate that the rate of change of the reference weight values is 1. In this case, the reference weight values 0 to 8 must pass through 0 , 1, 2, 3, 4, 5, 6, 7, 8, and the reference weight values from 8 to 0 must pass through 8, 7, 6, 5, 4, 3, 2, 1, 0. When the absolute value of the coefficient The weight conversion factor is 2, that is, when the weight conversion factor is -2 or 2, it is used to indicate that the rate of change of the reference weight values is 2. In this case, the reference weight values from 0 to 8 must go through 0, 2, 4 , 6, 8, and reference weight values from 8 to 0 must pass through 8, 6, 4, 2, 0. When the absolute value of the weight conversion factor is 0.5, that is, when the weight conversion factor is -0.5 or 0 ,5, it is used to indicate that the rate of change of the reference weights is 0.5. In this case, the reference weight values from 0 to 8 must go through 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, and reference weight values from 8 to 0 must pass through 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0 Examples from 0 to 8, and 0 and 8 can be replaced by any number.

[86] At step 402, the encoder side configures reference weights for surrounding positions outside the current block in accordance with the current block's weight conversion factor and the current block's weight conversion starting position.

[87] For example, the starting position of the weight transformation may be determined by at least one of the current block's weighted prediction angle, the current block's weighted prediction position, or the current block's size. Therefore, the starting position of the weight transformation of the current block can be determined based on at least one of the weighted prediction angle of the current block, the weighted prediction position of the current block, or the size of the current block. The reference weight values are then configured for surrounding positions outside the current block in accordance with the current block's weight conversion factor and the current block's weight conversion starting position.

[88] At step 403, for each pixel position of the current block, the encoder side determines a surrounding corresponding position indicated by the pixel position from surrounding positions outside the current block based on the weighted prediction angle of the current block. For ease of distinction, in this embodiment of the invention, the surrounding position outside the current block indicated by the pixel position may be referred to as the surrounding corresponding position for the pixel position.

[89] For example, since the weighted prediction angle refers to the angular direction indicated by the pixel position within the current block, for each pixel position of the current block, the angular direction indicated by the pixel position is determined based on the weighted prediction angle, and then the surrounding corresponding position indicated by the position is determined pixel, from surrounding positions outside the current block based on angular direction.

[90] Surrounding positions outside the current block may include surrounding positions in the line above the current block, for example, surrounding positions in the n1th line above the current block, where n1 may be 1 or 2, 3, etc., what is not limited here; or may include surrounding positions in the column to the left of the current block, for example, surrounding positions in the n2th column to the left of the current block, where n2 may be 1 or 2, 3, etc., which is not limited here; or may include surrounding positions in the line below the current block, for example, surrounding positions in the n3th line below the current block, where n3 may be 1, 2, 3, etc., but is not limited to this; or may include surrounding positions in the column to the right of the current block, for example, surrounding positions in the n4th column to the right of the current block, where n4 could be 1 or 2, 3, etc., but is not limited here.

[91] The above examples of surrounding positions are illustrative and not limited here. In practice, in addition to the surrounding positions outside the current block, the internal positions of the current block can also be used, that is, the internal positions of the current block are used to replace the above surrounding positions outside the current block, for example, the internal positions may include the internal positions in the n5th row inside the current block, where n5 could be 1 or 2, 3, etc., or internal positions in the n6th column inside the current block, where n6 could be 1 or 2, 3, etc. The length of internal positions may exceed the range of the current block, for example, the positions of the n7th row may exceed the range of the current block, that is, extend outward from two sides of the current block. Interior positions of the current block and surrounding positions outside the current block can be used simultaneously.

[92] To use the inner positions of the current block, or to use both the inner positions of the current block and surrounding positions outside the current block, the current block can be divided into two small blocks, top and bottom, based on the line in which the inner positions are located, or divided into two small blocks, left and right, depending on the column in which the internal positions are located. In this case, the two small blocks have the same weighted prediction angle and the same weighted prediction position.

[93] For example, surrounding positions outside the current block may be located between pixel positions, for example, at one or more subpixel positions, in which case the position of the current block cannot simply be described as a string of "x", but rather described as a string of positions subpixel located between the "x" line and the "y" line.

[94] For convenience of description, in the following embodiments, the surrounding positions in the first row from the top of the current block or the surrounding positions in the first column to the left of the current block are taken as an example for description, and other surrounding positions can be implemented in the same way.

[95] For example, for a range of surrounding positions outside the current block, that range may be pre-designated as a range of surrounding positions outside the current block. Alternatively, the range of surrounding positions outside the current block may be determined based on the weighted prediction angle, for example, the surrounding position indicated by each of the pixel positions within the current block is determined based on the weighted prediction angle, and the boundary of the surrounding positions indicated by all pixel positions may represent is the range of surrounding positions outside the current block. The range of surrounding positions is not limited here.

[96] Surrounding positions outside the current block may include one or more integer pixel positions and/or one or more non-integer pixel positions. The non-integer pixel position may be a sub-pixel position, such as a 1/2 sub-pixel position, or a 1/4 sub-pixel position, or a 3/4 sub-pixel position and the like, which is not limited here.

[97] For example, two surrounding positions outside the current block may correspond to one whole pixel position; or four surrounding positions outside the current block may correspond to one whole pixel position; or one surrounding position outside the current block may correspond to one whole pixel position; or one surrounding position outside the current block may correspond to two whole pixel positions. The above are just a few examples that do not limit the invention. The relationship between the surrounding position and the whole pixel position can be configured arbitrarily.

[98] As shown in FIG. 4B and 4C, one surrounding position corresponds to one whole pixel position, and, as shown in FIG. 4E, two surrounding positions correspond to one whole pixel position. Other examples will not be described in this embodiment for brevity.

[99] At step 404, the encoder side determines the target weight value of the pixel position based on the reference weight value associated with the surrounding corresponding position.

[100] For each pixel position of the current block, after determining the surrounding corresponding position indicated by the pixel position, the encoder side determines a reference weight value associated with the surrounding corresponding position, and determines a target pixel position weight value based on the reference weight value associated with the surrounding corresponding position , for example, defines a reference weight value associated with a surrounding corresponding position as a target pixel position weight value.

[101] In an exemplary implementation, the encoder side determines the target weight value of a pixel position based on a reference weight value associated with a surrounding corresponding position, which may include the following several cases.

[102] Case 1: If the surrounding corresponding position is an integer pixel position, and the integer pixel position is configured with a reference weight value, the target pixel position weight value can be determined based on the reference weight value of the integer pixel position.

[103] Case 2: If the surrounding corresponding position is an integer pixel position, and the integer pixel position is not configured with a reference weight value, the target weight value of the pixel position can be determined based on the reference weight(s) value(s) of the neighbor(s). their) position(s) of the whole pixel. For example, a round-up operation may be performed on the reference weight value of an adjacent position to obtain a target pixel position weight value; or performing a round-down operation on the adjacent position reference weight value to obtain a target pixel position weight value; or determining a target pixel position weight value based on interpolation of reference weight values of neighboring positions of the integer pixel position. The method of determination is not limited here.

[104] Case 3: If the surrounding corresponding position is a subpixel position, and the subpixel position is configured with a reference weight value, the target pixel position weight value is determined based on the reference subpixel position weight value.

[105] Case 4: If the surrounding corresponding position is a subpixel position, and the subpixel position is not configured with a reference weight value, the target pixel position weight value is determined based on one or more reference weight values of one or more neighboring subpixel position positions. For example, a round-up operation may be performed on the reference weight value of an adjacent position to obtain a target pixel position weight value; or performing a round-down operation on the adjacent position reference weight value to obtain a target pixel position weight value; or determining a target pixel position weight value based on interpolation of reference weight values of adjacent subpixel position positions. The method of determination is not limited here.

[106] Case 5, a target weight value of a pixel position is determined based on several reference weight values associated with a surrounding corresponding position. For example, when the surrounding corresponding position is a whole pixel position or a sub-pixel position, reference weight values of a plurality of neighboring positions of the surrounding corresponding position can be obtained. If the surrounding corresponding position is configured with a reference weight value, a weighted operation is performed based on the reference weight value of the surrounding corresponding position and the reference weight values of a plurality of neighboring positions to obtain a target pixel position weight value. If the surrounding corresponding position is not configured with a reference weight value, a weighted operation is performed based on the reference weight values of a plurality of neighboring positions to obtain a target weight value of the pixel position.

[107] At step 405, the encoder side determines an associated pixel position weight value based on the target pixel position weight value.

[108] For example, for each pixel position, the sum of the target pixel position weight value and the associated pixel position weight value may be a fixed predetermined value, that is, the associated weight value may be the difference of the predetermined value and the target weight value. Based on this, it is assumed that the predetermined value is 8. If the target pixel position weight value is 2, the associated pixel position weight value is 6.

[109] In step 406, for each pixel position of the current block, the encoder side determines a first pixel position prediction value based on a first prediction mode of the current block, and determines a second pixel position prediction value based on a second prediction mode of the current block.

[110] For example, the first prediction mode may be any of an intra-block copy prediction mode, an intra prediction mode, an inter prediction mode, and a palette mode; and the second prediction mode may be any of an intra-block copy prediction mode, an intra prediction mode, an inter prediction mode, and a palette mode. For example, the first prediction mode may be an intra-block copy prediction mode, and the second prediction mode may be an intra-block copy prediction mode; or the first prediction mode may be an intra-block copy prediction mode, and the second prediction mode may be an intra-prediction mode; or the first prediction mode may be an intra-block copy prediction mode, and the second prediction mode may be an inter-prediction mode; or the first prediction mode may be an intra-block copy prediction mode, and the second prediction mode may be a palette mode. Likewise, there is no limitation on the first prediction mode and the second prediction mode.

[111] The process of determining prediction values based on the first prediction mode and the second prediction mode can be applied to subsequent embodiments of the invention.

[112] At step 407, the encoder side determines a weighted pixel position prediction value based on the first pixel position prediction value, the target pixel position weight value, the second pixel position prediction value, and the associated pixel position weight value.

[113] For example, the weighted pixel position prediction value may be: (first pixel position prediction value * target pixel position weight value + second pixel position prediction value * associated pixel position weight value) / fixed predetermined value.

[114] At step 408, the encoder side determines the weighted prediction values of the current block based on the weighted prediction values of all pixel positions in the current block.

[115] As described in the above technical solutions, embodiments of the present invention provide an efficient method for configuring weight values, in which a suitable target weight value is configured for each pixel position of the current block, so that the prediction values of the current block are closer to the values of the source pixels, which improves the prediction accuracy, prediction efficiency and coding efficiency.

[116] Embodiment 3 of the invention. Based on Embodiment 1, the embodiments of the present invention provide another encoding and decoding method, as shown in FIG. 4F, which is a schematic diagram illustrating a flowchart of an encoding and decoding method. The method may be applied on the decoder side and include the following steps.

[117] At step 411, when it is determined that weighted prediction should be enabled for the current block, the decoder side obtains the weighted prediction angle of the current block, the weighted prediction position of the current block, and the weight conversion factor of the current block. For example, the decoder side determines whether weighted prediction should be enabled for the current block. If the decoder side determines that weighted prediction should be enabled for the current block, step 411 and subsequent steps are performed, otherwise the processing method is not limited to the present invention.

[118] In an exemplary implementation, the encoder side determines whether the characteristic information of the current block satisfies a certain condition, and if the characteristic information satisfies the certain condition, the encoder side determines that a weighted prediction should be allowed for the current block. The decoder side also determines whether the performance information of the current block satisfies a certain condition, and if the performance information satisfies the certain condition, the decoder side determines that weighted prediction should be allowed for the current block, otherwise the decoder side determines that weighted prediction should not be allowed. prediction for the current block. The manner in which the decoder side determines whether to allow weighted prediction for the current block based on the performance information may be referred to at step 401 and will not be repeated here.

[119] In another possible encoder-side implementation, it is determined whether the current block supports weighted prediction based on information about the characteristics of the current block. When the current block supports weighted prediction, another strategy may also be adopted to determine whether to enable weighted prediction for the current block, for example, using RDO to determine whether to enable weighted prediction for the current block. After determining whether to enable weighted prediction for the current block, when the encoder side transmits the encoded bitstream of the current block, the encoded bitstream may include syntax for determining whether to enable weighted prediction for the current block, wherein the syntax indicates whether to enable weighted prediction for current block. The decoder side determines whether the current block supports weighted prediction based on information about the characteristics of the current block. When it is determined that the current block supports weighted prediction, the decoder side may decode a syntax for determining whether to enable weighted prediction from the encoded bitstream and determine whether to enable weighted prediction for the current block based on the syntax.

[120] For example, when it is determined that weighted prediction should be enabled for a current block, the decoder side may also obtain a weighted prediction angle of the current block, a weighted prediction position of the current block, and a weight conversion factor of the current block, wherein a corresponding description of the weighted prediction angle, weighted position prediction and weight conversion factor may be referred to at step 401 and will not be repeated here.

[121] At step 412, the decoder side configures reference weights for surrounding positions outside the current block in accordance with the current block's weight conversion factor and the current block's weight conversion starting position.

[122] For example, the decoder side may determine the starting position of the weight transformation of the current block based on at least one of the weighted prediction angle of the current block, the weighted prediction position of the current block, or the size of the current block. The decoder side then configures reference weights for surrounding positions outside the current block according to the weight conversion factor of the current block and the weight conversion start position of the current block.

[123] At step 413, for each pixel position of the current block, the decoder side determines a surrounding corresponding position indicated by the pixel position from surrounding positions outside the current block based on the weighted prediction angle of the current block.

[124] At step 414, the decoder side determines a target pixel position weight value based on a reference weight value associated with a surrounding corresponding position.

[125] At step 415, the decoder side determines an associated pixel position weight value based on the target pixel position weight value.

[126] At step 416, for each pixel position of the current block, the decoder side determines a first pixel position prediction value based on the first prediction mode of the current block, and determines a second pixel position prediction value based on the second prediction mode of the current block.

[127] At step 417, the decoder side determines a weighted pixel position prediction value based on the first pixel position prediction value, the target pixel position weight value, the second pixel position prediction value, and the associated pixel position weight value.

[128] At step 418, the decoder side determines the weighted prediction values of the current block based on the weighted prediction values of all pixel positions in the current block.

[129] For example, the processes implementing steps 412-418 can be referred to as steps 402-408, with the difference that steps 412-418 are decoder-side processes rather than encoder-side processes, so they will not be repeated here.

[130] As described in the above technical solutions, embodiments of the present invention provide an efficient method for configuring weight values, in which a suitable target weight value is configured for each pixel position of the current block, so that the prediction values of the current block are closer to the original pixels, which improves prediction accuracy, prediction efficiency, and encoding and decoding efficiency.

[131] Embodiment 4 of the invention. In Embodiments 1 to 3, it is expected that weighted processing will be performed based on the weighted prediction angle, and the weighted processing method may be referred to as Angular Weighted Prediction (AWP) mode. That is, when the current block supports the AWP mode, the current block is predicted using embodiments 1 to 3 of the invention to obtain prediction values of the current block.

[132] Embodiments 1 to 3 include a weighted prediction angle. The weighted prediction angle may be any angle, such as any angle within 180 degrees, or any angle within 360 degrees, such as 10 degrees, 20 degrees, 30 degrees or the like, which is not limited here.

[133] In an exemplary implementation, the weighted prediction angle may be a horizontal angle (eg, angle 2 in FIG. 7B); or the weighted prediction angle may be a vertical angle (eg, angle 6 in FIG. 7B); or the absolute value of the weighted prediction angle slope (the absolute value of the weighted prediction angle slope is the tangent of the weighted prediction angle) may be the nth power of 2, where n is an integer, such as a positive integer, 0, and a negative integer.

[134] For example, the absolute value of the slope of the weighted prediction angle can be 1 (that is, the value of the 0th power of 2), 2 (that is, the value of the 1st power of 2), 1/2 (that is, the value of -1 powers of the number 2), 4 (that is, the value of the 2nd power of the number 2), 1/4 (that is, the value of the -2nd power of the number 2), 8 (that is, the value of the 3rd power of the number 2) or 1/8 (that is, the value of the -3rd power of the number 2), etc. For example, in FIG. Figure 5 shows eight weighted prediction angles, and the absolute values of the slopes of the weighted prediction angles are the values of the nth power of 2.

[135] In embodiments of the present invention, a shift operation may be performed on the weighted prediction angle. See the following embodiments for examples of the weighted prediction angle shift operation. Therefore, when the absolute value of the slope of the weighted prediction angle is equal to the nth power of 2, the division operation can be avoided during the shift operation of the weighted prediction angle, which makes it easier to implement the shift.

[136] For example, the number of weighted prediction angles supported by different block sizes (eg, the size of the current block) may be the same or different. For example, block size A supports 8 weighted prediction angles, block size B and block size C support 6 weighted prediction angles, etc.

[137] Embodiment 5 of the invention. In Embodiments 1 to 3, it is necessary to configure reference weights for surrounding positions outside the current block on the encoder side or on the decoder side according to the weight conversion factor of the current block and the weight conversion start position of the current block. In a possible implementation, the following method could be used: for each surrounding position outside the current block, a reference weight value of the surrounding position is configured based on the coordinate values of the surrounding position, the coordinate values of the weight transformation start position, and the weight transformation factor.

[138] For example, for each surrounding position outside the current block, if the surrounding position is a surrounding position one line above or one line below the current block, the coordinate value of the surrounding position may be the abscissa value, and the coordinate value of the weight transformation starting position may be the abscissa value. Alternatively, if the surrounding position is a surrounding position one column to the left or one column to the right of the current block, the coordinate value of the surrounding position may be an ordinate value and the coordinate value of the weight transformation starting position may be an ordinate value.

[139] For example, the pixel position in the upper left corner of the current block (for example, the first pixel position in the upper left corner) can be used as the origin, and the coordinate value of the current block's surrounding position (for example, the abscissa value or ordinate value) and the coordinate value The starting position of the weight transformation (for example, the abscissa value or the ordinate value) are both coordinate values relative to the origin. Another pixel position of the current block can also be taken as the origin, and the implementation method is similar to the method of using the pixel position in the top left corner as the origin.

[140] In an exemplary implementation, the difference between the coordinate value of the surrounding position and the coordinate value of the starting position of the weight transformation is first determined, and the value of the product of the difference and the weight transformation coefficient of the current block is determined. If the product value is less than the first value (eg, the minimum value of the reference weight value, such as 0), the reference weight value associated with the surrounding position is determined to be the first value. If the product value exceeds the second value (eg, the maximum value of the reference weight value, such as 8), the reference weight value associated with the surrounding position is determined to be the second value. If the product value is not less than the first value and not greater than the second value, the reference weight value associated with the surrounding position is determined to be the product value. In another possible implementation, the reference weight value associated with the surrounding position may also be determined directly based on the size relationship between the coordinate value of the surrounding position and the coordinate value of the weight transformation start position. For example, if the coordinate value of the surrounding position is smaller than the coordinate value of the weight transformation starting position, the reference weight value associated with the surrounding position is determined as the first value; and, if the coordinate value of the surrounding position is not less than the coordinate value of the weight transformation starting position, the reference weight value associated with the surrounding position is determined as the second value. In another example, if the coordinate value of the surrounding position is less than the coordinate value of the weight transformation starting position, the reference weight value associated with the surrounding position is determined as the second value; and, if the coordinate value of the surrounding position is not less than the coordinate value of the weight transformation starting position, the reference weight value associated with the surrounding position is determined as the first value.

[141] For example, the first value and the second value may be configured based on experience, and the first value is less than the second value. The first meaning and the second meaning are not limited here. In some examples, the first value may be the minimum value of the pre-negotiated reference weight values, such as 0, and the second value may be the maximum value of the pre-negotiated reference weight values, such as 8, where 0 and 8 are examples only.

[142] For example, as shown in FIG. 4D, after all surrounding positions are equally divided into eight parts, seven weighted prediction positions are obtained. When the weighted prediction position is 0, it indicates the surrounding position a0, and the coordinate value of the starting position of the weight transformation is the coordinate value of the surrounding position a0. When the weighted prediction position is 1, it indicates the surrounding position of a1, and the coordinate value of the starting position of the weight transformation is the coordinate value of the surrounding position of a1, etc. The method for determining the coordinate value of the initial position of the weight transformation will not be repeated here.

[143] Embodiment 6 of the invention. In Embodiments 1 to 3, it is necessary to configure reference weights for surrounding positions outside the current block on the encoder side or on the decoder side according to the weight conversion factor of the current block and the weight conversion start position of the current block. In a possible implementation, the following method may be used: obtain the weighted prediction angle of the current block, the conversion factor of the current block's weights, and the weighted prediction position of the current block, determine the initial position of the transformation of the current block's weights based on the weighted prediction position of the current block, and determine the weight configuration parameters based on the initial position weight conversion and weight conversion factor. The weight configuration parameters include the weight transformation starting position and the weight transformation factor. Then, based on the parameters of the weight configuration, the reference weight values of the surrounding positions outside the current block are determined.

[144] The process of configuring reference weights for surrounding positions outside the current block is described below in conjunction with specific implementation methods.

[145] First, the actual number of reference weights is obtained, and then the reference weights of surrounding positions outside the current block are configured according to the actual number of reference weights.

[146] For example, the number of surrounding positions outside the current block is a real number, and the actual number of reference weights needs to be obtained, where the actual number can be determined based on the size of the current block and/or the weighted prediction angle of the current block. For example, the actual amount of ValidLength can be defined as follows: ValidLength=(N+(M>>X))<<1, where N represents the height of the current block, M represents the width of the current block, X represents the logarithm log2 value of the absolute value of the slope of the weighted prediction angle of the current block, such as 0 or 1, << means an arithmetic left shift, and >> means an arithmetic right shift.

[147] In the present invention, a<<b can be understood as an arithmetic left shift of the integer two's complement representation of a by b binary digits, and this operation is defined when b is a positive number. Simply put, a<<b can be understood as multiplying a by 2 to the power of b. As used herein, a>>b can be understood as an arithmetic right shift of the two's complement integer representation of a by b binary digits, and this operation is defined when b is a positive number. Simply put, a>>b can be understood as dividing a by 2 to the power of b.

[148] In an exemplary implementation, the actual number of reference weights may monotonically increase or monotonically decrease. Optionally, the actual number of reference weight values may first include a plurality of first reference weight values and then include a plurality of second reference weight values, or first include a plurality of second reference weight values and then include a plurality of first reference weight values. The description is given below in conjunction with several conditions.

[149] Condition 1: The actual number of reference weights can monotonically increase or monotonically decrease. For example, the actual number of reference weight values can be [8 8…88765432100…0 0], that is, monotonically decreasing. In another example, the actual number of reference weight values can be [0 0…0 0 1 2 3 4 5 6 7 8 8… 8 8], that is, monotonically increasing. The above examples are illustrative only and do not limit the present invention.

[150] For example, weight reference values may be configured based on weight configuration parameters. The weight configuration parameters may include the weight conversion factor and the weight conversion starting position. See the following embodiments of the method for obtaining the weight conversion factor. The weight transformation starting position may be a value set based on experience, or the weight transformation starting position may also be determined based on the weighted prediction position, or determined based on the weighted prediction angle and the weighted prediction position, which is not limited.

[151] The actual number of reference weights may monotonically increase or decrease from the first to the last. For example, if the maximum value of the reference weight values is M1 and the minimum value of the reference weight values is M2, the actual number of reference weight values decreases monotonically from the maximum value of M1 to the minimum value of M2 or increases monotonically from the minimum value of M2 to the maximum value of M1. If M1 is 8 and M2 is 0, the set of reference weights decreases monotonically from 8 to 0 or monotonically increases from 0 to 8.

[152] For example, first a weight conversion factor and a weight conversion starting position may be obtained, and then, based on the weight conversion factor and a weight conversion starting position, a plurality of reference weight values can be determined. For example, reference weights can be defined as follows: y(x)=Clip3(min, max, a*(x-s)), where x represents the index of the surrounding position, which ranges from 1 to the actual quantity value, e.g. equals 1, indicating the first surrounding position; y(x) represents the reference weight value for the x-th surrounding position, "a" represents the weight transformation factor, and s represents the start weight transformation position. The Clip3 function is used to constrain reference weights between the minimum and maximum values. The maximum value and minimum value can be configured based on experience. For simplicity, the following description is provided with a minimum value of 0 and a maximum value of 8 as an example.

[153] "a" represents the weight conversion factor, and "a" may be a non-zero integer, for example, "a" may be -4, -2, -1, 1, 2, 4, etc. There are no restrictions on the value of a. If the absolute value of "a" is 1, then reference weights 0 to 8 must go through 0, 1, 2, 3, 4, 5, 6, 7, 8, or reference weights 8 to 0 must go through 8 , 7, 6, 5, 4, 3, 2, 1, 0.

[154] s may represent a starting position of the weight transformation, which may be determined based on the position of the weighted prediction. For example, s=f (weighted prediction position), that is, s is a function of the weighted prediction position. For example, after determining the range of surrounding positions outside the current block, the actual number of surrounding positions is determined, and all surrounding positions are equally divided into N parts, where the value of N can be configured arbitrarily, such as 4, 6, 8, etc. The weighted prediction position is used to represent which surrounding position outside the current block is taken as one of the target surrounding positions of the current block, and the surrounding position corresponding to the weighted prediction position is the starting position of the weight transformation. Optionally, the value of s can be determined based on the weighted prediction angle and the weighted prediction position, for example, s=f (weighted prediction angle, weighted prediction position), that is, s is a function of the weighted prediction angle and the weighted prediction position. For example, the range of surrounding positions outside the current block can be determined based on the weighted prediction angle. After determining the range of surrounding positions outside the current block, the actual number of surrounding positions can be determined, and all surrounding positions are equally divided into N parts. The weighted prediction position is used to represent which surrounding position outside the current block is taken as one of the target surrounding positions of the current block, and the surrounding position corresponding to the weighted prediction position is the starting position of the weight transformation.

[155] To summarize, in y(x)=Clip3 (minimum, maximum, a*(x-s)) the weight transformation coefficient a and the weight transformation starting position s are known values. For each of the surrounding positions x outside the current block, a reference weight value y(x) of the surrounding position can be determined based on the functional relationship. For example, if the weight transformation factor a is 2 and the weight transformation starting position s is 2, the functional relationship could be y(x)=Clip3 (minimum, maximum, 2*(x-2)). For each surrounding position x outside the current block, a reference weight value y(x) can be obtained.

[156] In this way, the actual number of reference weight values of the current block can be obtained, and these reference weight values can monotonically increase or monotonically decrease. In an exemplary embodiment of the invention, 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.

[157] For example, the target positions include one reference weight value or at least two reference weight values. For example, a reference weight value is determined based on the starting position of the weight transformation, and positions corresponding to the reference weight value are taken as target positions. In another example, at least two reference weight values are determined based on the starting position of the weight transformation, and positions corresponding to the at least two reference weight values are taken as target positions.

[158] If 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. A monotonic increase may be a strictly monotonic increase (at least two reference weights of the target positions are strictly monotonically increased); and the monotonic decrease may be a strictly monotonic decrease (at least two reference weights of the target positions are strictly monotonically decreased). For example, the reference weight values of the target positions increase monotonically from 1 to 7, or the reference weight values of the target positions monotonically decrease from 7 to 1.

[159] For example, all the reference weight values of the first adjacent positions may be the first reference weight value, and the reference weight values of the second adjacent positions may increase monotonically. For example, the reference weights of the first neighboring positions may all be 0, the target positions include one reference weight value of 1, and the reference weights of the second neighboring positions increase monotonically from 2 to 8.

[160] Alternatively, all of the reference weight values of the first adjacent positions may be the first reference weight value, and the reference weight values of the second adjacent positions may be monotonically decreasing. For example, the first adjacent position reference weights may all be 8, the target positions include one weight reference value equal to 7, and the second adjacent position reference weights decrease monotonically from 6 to 0.

[161] Alternatively, all reference weights of the first adjacent positions are a second reference weight, and all reference weights of the second adjacent positions are a third reference weight, wherein the second reference weight is different from the third reference weight. For example, all reference weights of the first adjacent positions are 0, the target positions include at least two reference weights that increase monotonically from 1 to 7, and all reference weights of the second adjacent positions are 8, wherein the reference weights of the first adjacent positions differ from the reference weight values of the second neighboring positions.

[162] Optionally, the reference weight values of the first adjacent positions and the reference weight values of the second adjacent positions are monotonically increased or monotonically decreased simultaneously. For example, the reference weight values of the first adjacent positions increase monotonically, and the reference weight values of the second adjacent positions also increase monotonically. In another example, the reference weight values of the first adjacent positions are monotonically decreased, and the reference weight values of the second adjacent positions are also monotonically decreased. For example, the reference weights of the first adjacent positions increase monotonically from 0 to 3, the target positions include one reference weight of 4, and the reference weights of the second adjacent positions monotonically increase from 5 to 8.

[163] Condition 2: The actual number of reference weight values may first include a plurality of third values and then include a plurality of fourth values, or may first include a plurality of fourth values and then include a plurality of third values. For example, the actual number of reference weights could be [8 8... 8 8 0 0... 0 0] or [0 0... 0 0 8 8... 8 8]. For example, a plurality of reference weight values may be determined based on the starting position of the weight transformation. For example, the starting position of the weight transformation represents the s-e reference weight value. Therefore, all reference weight values before the sth reference weight value (excluding the s-e reference weight value) are the third value (e.g., 8), and all reference weight values after the sth reference weight value (including the s-e reference weight value) are the fourth value value (for example, 0). Alternatively, all reference weights before the sth reference weight are the fourth value, and all reference weights after the sth reference weight are the third value.

[164] After obtaining the actual number of reference weight values, the reference weight values of the surrounding positions outside the current block are configured in accordance with the actual number of reference weight values.

[165] For example, the number of surrounding positions outside the current block is a real number, and the number of reference weights is a real number, so that the actual number of reference weights can be configured as the reference weights of surrounding positions outside the current block. For example, the first reference weight value may be configured as the reference weight value of the first surrounding position outside the current block, and the second reference weight value may be configured as the reference weight value of the second surrounding position outside the current block, etc.

[166] Thus, reference weights are configured for surrounding positions outside the current block, that is, each surrounding position has a reference weight value. Therefore, the reference weight value associated with the surrounding corresponding position, which is the target pixel position weight value, can be determined after determining the surrounding corresponding position, indicated by the pixel position, from surrounding positions outside the current block.

[167] An implementation of the above process is described below in conjunction with several specific application scenarios. For example, the following application scenarios assume that the size of the current block is M * N, where M represents the width of the current block and N represents the height of the current block. X represents the logarithm log2 of the tangent of the weighted prediction angle, such as 0 or 1. Y represents the weighted prediction position index value, and A, b, c and d represent predetermined constant values. ValidLength represents the actual quantity, FirstPos represents the starting position of the weight transformation, ReferenceWeights[i] represents the reference weight value of the i-th surrounding position, the Clip3 function is used to constrain the reference weight value between a minimum value of 0 and a maximum value of 8, i is the index of the surrounding positions for outside the current block, and "a" represents the absolute value of the weight conversion factor.

[168] Application Scenario 1: Determine the valid quantity (also known as the valid length of the reference weight, that is, ValidLength) based on the size of the current block and the weighted prediction angle of the current block, and obtain the FirstPos starting position of the weight transformation. For example, ValidLength can be determined using the following formula: FirstPos can be determined using the following formula: Based on this, the reference weight value of each surrounding position of the current block is derived using the following formula: The range of i values can be from 0 to ValidLength-1 or from 1 to ValidLength. After obtaining the reference weight value ReferenceWeights[i] of the surrounding position of the current block, the target weight value of the pixel position (x, y) of the current block is obtained using the following formula: where << means arithmetic left shift and >> means arithmetic right shift.

[169] Application Scenario 2: ValidLength can be determined using the following formula: FirstPos can be determined using the following formula: Based on this, the reference weight value of each surrounding position of the current block is derived using the following formula: The target weight value of each pixel position (x, y) of the current block can be obtained by the following formula:

[170] Application Scenario 3: ValidLength can be determined using the following formula: FirstPos can be determined using the following formula: Based on this, the reference weight value of each surrounding position of the current block can be obtained using the following formula: The target weight value of each pixel position (x, y) of the current block can be obtained by the following formula:

[171] Application Scenario 4: ValidLength can be determined using the following formula: FirstPos can be determined using the following formula: Based on this, the reference weights of each surrounding position of the current block can be obtained using the following formula: The target weight value of each pixel position (x, y) of the current block can be obtained by the following formula:

[172] Application Scenario 5: In FIG. Figure 6 shows a schematic diagram of the weight reference values for the four weight conversion factors.

[173] When the absolute value of the weight conversion factor is 1, that is, the weight conversion factor is 1 or -1, the reference weight value of each surrounding position of the current block can be obtained by the following formula: and the above formula can be rewritten as In this case, the first type shown in FIG. 6, the FirstPos value can be 4, that is, the reference weight values of the 1st to 4th surrounding positions are 0, the reference weight value of the 5th surrounding position is 1, the reference weight value of the 6th surrounding position is 2, etc. .d.

[174] When the absolute value of the weight conversion factor is 2, that is, the weight conversion factor is 2 or -2, the reference weight value of each surrounding position of the current block is obtained by the following formula: and the above formula can be rewritten as In this case, the second type shown in FIG. 6, the FirstPos value can be equal to 6, that is, the reference weight values of the 1st to 6th surrounding positions are 0, the reference weight value of the 7th surrounding position is 2, the reference weight value of the 8th surrounding position is 4, etc. d.

[175] When the absolute value of the weight conversion factor is 4, that is, the weight conversion factor is 4 or -4, the reference weight value of each surrounding position of the current block is obtained by the following formula: and the above formula can be rewritten as In this case, the third type shown in FIG. 6, FirstPos can be equal to 7, that is, the reference weight values of the surrounding positions 1st to 7th are 0, the reference weight value of the 8th surrounding position is 4, the reference weight values of the surrounding positions 9th to 17th are equal to 8, etc.

[176] When the absolute value of the weight conversion factor is 8, that is, the weight conversion factor is 8 or -8, the reference weight value of each surrounding position of the current block is obtained by the following formula: and the above formula can be rewritten as In this case, the fourth type shown in FIG. 6, FirstPos can be equal to 8, that is, the reference weight values of the surrounding positions 1st to 8th are 0, the reference weight value of the 9th surrounding position is 8, the reference weight values of the surrounding positions 10th to 17th are equal to 8, etc.

[177] Thus, when the absolute value of the weight conversion factor is 1, FirstPos is 4; when the absolute value of the weight conversion factor is 2, FirstPos is 6 (i.e., FirstPos when the weight conversion factor is 1 plus 2); and when the absolute value of the weight conversion factor is 4, FirstPos is 7 (i.e., FirstPos when the weight conversion factor is 1 plus 3). From this, positions with reference weight value 4 can be aligned.

[178] For example, for the current block, when weight conversion factor switching is supported and weight conversion factor switching is enabled, one of 4 types for the weight conversion factor reference weight distributions shown in FIG. 6, so that by switching the weight conversion factor for an image or a portion of an image, it is possible to reduce the problem that rapid changes in image display values in some image display scenes are noticeable. For example, in some image display scenes, the problem of noticeable rapid value changes is expected to be reduced, and switching the weight conversion factor in AWP mode can solve this problem. For example, mixed image content includes a portion of screen contents, cartoons, images containing cartoons, etc., switching the weight conversion factor can be applied to a specific area containing screen contents to reduce the problem that rapid changes in values are noticeable .

[179] In the above process, the ValidLength value is related to the weighted prediction angle of the current block and the size of the current block. To simplify the design, some parameters can be fixed to achieve optimization. For example, the weighted prediction angle of the current block can be set to a fixed parameter value, and ValidLength refers only to the size of the current block. The FirstPos value is related to the current block's weighted prediction angle, the current block's size, and the current block's weighted prediction position. In another example, the weighted prediction angle of the current block may be configured as a fixed parameter value, and the FirstPos value refers only to the size of the current block and the weighted prediction position of the current block. Optionally, the weighted prediction position of the current block can be configured as a fixed parameter value, and the FirstPos value only refers to the size of the current block and the weighted prediction angle of the current block. Optionally, the weighted prediction angle of the current block and the weighted prediction position of the current block can be configured as fixed parameter values, which can be the same or different, and the FirstPos value refers only to the size of the current block.

[180] Embodiment 7 of the invention. In Embodiments 1 to 3, it is necessary to configure reference weights for surrounding positions outside the current block on the encoder side or on the decoder side according to the weight conversion factor of the current block and the weight conversion start position of the current block. In a possible implementation, M and N represent the width and height of the current block, respectively. As shown in FIG. 7A, a method for obtaining a weight array for an angle weighted prediction (AWP) mode may include the following.

[181] In step a1, parameters such as stepIdx, angleIdx and subAngleIdx are obtained based on AwpIdx.

[182] For example, AwpIdx represents a weighted prediction angle index value and a weighted prediction position. If there are 7 weighted prediction positions and 8 weighted prediction angles, the value range of AwpIdx is 0 to 55. If the weighted prediction positions are -3 to 3 (representing the fourth weighted prediction position is the center, and the fourth weighted prediction position is 0), and, If the weighted prediction angle index is 0-7, the weighted prediction positions and weighted prediction angles corresponding to the 56 AwpIdx index values are shown in Table 1.

[183] For example, stepIdx represents a weighted prediction position (eg, a weighted prediction position index value) that is in the range of -3 to 3. For example, for the first weighted prediction position, the weighted prediction position index value is -3; for the second weighted prediction position, the weighted prediction position index value is -2, etc.; for the seventh weighted prediction position, the weighted prediction position index value is 3.

[184] angleIdx represents the log2 value of the absolute value of the slope of the weighted prediction angle (eg, 0, or 1, or a greater constant), and subAngleIdx represents the angular region in which the weighted prediction angle lies. In FIG. 7B shows eight weighted prediction angles, where weighted prediction angle 0 angleIdx is the log2 value of the absolute value of weighted prediction angle 0 slope, angleIdx of weighted prediction angle 1 is the log2 value of the absolute value of weighted prediction angle 1 slope, etc., a angleIdx of the weighted prediction angle 7 is the log2 value of the absolute value of the slope of the weighted prediction angle 7. Weighted prediction corner 0 and weighted prediction corner 1 are located in corner region 0, weighted prediction corner 2 and weighted prediction corner 3 are located in corner region 1, weighted prediction corner 4 and weighted prediction corner 5 are located in corner region 2, and weighted prediction corner 6 and the weighted prediction angle 7 are located in the angle region 3.

[185] For example, stepIdx can be determined using the following formula:

[186] For example, modAngNum(angle index) can first be determined based on the following formula: then angleIdx is determined based on modAngNum as follows: if modAngNum is 2, angleIdx=7; if modAngNum is 6, angleIdx=8; otherwise angularIdx=modAngNum % 2.

[187] For example, subAngleIdx can be determined using the following formula:

[188] Thus, after determining the weighted prediction angle of the current block and the weighted prediction position of the current block, the encoder side, based on the weighted prediction angle and the weighted prediction position, can determine the value of AwpIdx, as shown in Table 1. When the encoder side transmits the encoded bit stream to the decoder side , the encoded bitstream may contain the value AwpIdx. So the decoder side can get the AwpIdx value and then get the stepIdx, angleIdx and sub AngleIdx based on the AwpIdx.

[189] For example, based on angleIdx and sub AngleIdx, one weighted prediction angle can be uniquely determined as shown in Table 2. The weighted prediction angle can also be determined in another way, such as by changing the section number, etc.

[190] In step a2, based on stepIdx, angleIdx and sub AngleIdx, reference weight values for surrounding positions outside the current block are configured. Stage a2 includes the following conditions.

[191] Condition 1: If the value of subAngleIdx is 0, that is, the weighted prediction angle is in the angle region 0, for example, the weighted prediction angle is equal to the weighted prediction angle 0 or the weighted prediction angle 1, the starting position FirstPos of the weight transformation can be determined by the following formula: You can then determine the reference weights of the surrounding positions outside the current block using the following formula: The formula is given for the minimum value of reference weights to be 0, the maximum value of reference weights to be 8, and the weight conversion factor to be 1 as an example, that is, the above formula can be equivalent to ReferenceWeights[x]=Clip3 (minimum, maximum, a*(x-FirstPos)), where x can refer to the index of one of the surrounding positions outside the current block, x ranges from 0 to ValidLength_H-1, and "a" represents the weight conversion factor.

[192] In the above formula, ValidLength_H can represent the number of surrounding positions outside the current block (eg, valid quantity, also called valid length). When the value of subAngleIdx is 0, the surrounding positions outside the current block, indicated by the weighted prediction angle, can be the surrounding positions in the left column. Therefore, the valid quantity is denoted as ValidLength H. For example, the valid quantity ValidLength H can be determined by the following formula: The left shift is one bit because the formula uses 1/2 pixel precision. If 1 pixel precision is used, the formula will be:

If 1/4 pixel precision is used, the formula would be: If 2 pixel precision is used, Other pixel precisions may be used and no redundant descriptions are given here. In subsequent formulas, the operations involving >>1 may change for different pixel precisions.

[193] In the above formula, DeltaPos_H represents the position change parameter (eg, intermediate parameter). When the value of subAngleIdx is 0, the surrounding positions outside the current block, indicated by the weighted prediction angle, can be the surrounding positions in the column to the left of the current block. Therefore, the position change parameter is designated as DeltaPos_H. For example, DeltaPos_H is determined by the following formula:

[194] Condition 2: If the value of subAngleIdx is 1, that is, the weighted prediction angle is in angle region 1, for example, the weighted prediction angle is weighted prediction angle 2 or weighted prediction angle 3, the starting position FirstPos of the weight transformation can be determined by the following formula : You can then determine the reference weights of the surrounding positions outside the current block using the following formula: The formula is given for a minimum reference weight value of 0, a maximum reference weight value of 8, and a weight conversion factor of "a", as an example, x may represent the index of surrounding positions outside the current block, and x is in the range from 0 to ValidLength_H-1.

[195] In the above formula can be attributed to condition 1 and will not be repeated here.

[196] Condition 3: If the value of subAngleIdx is 2, that is, the weighted prediction angle is in angle region 2, for example, the weighted prediction angle is weighted prediction angle 4 or weighted prediction angle 5, the starting position FirstPos of the weight transformation can be determined by the following formula : You can then determine the reference weights of the surrounding positions outside the current block using the following formula: The formula is given for a minimum reference weight value of 0, a maximum reference weight value of 8, and a weight conversion factor of "a", as an example, x may represent the index of surrounding positions outside the current block, and x ranges from 0 to ValidLengthW -1.

[197] In the above formula, ValidLength_W represents the number of surrounding positions outside the current block (eg, valid quantity, also called valid length). When the value of subAngleIdx is 2, the surrounding positions outside the current block, indicated by the weighted prediction angle, can be the surrounding positions in the same top row. Therefore, the valid quantity is designated as ValidLength_W. For example, the actual amount of ValidLength_W can be determined by the following formula:

[198] In the above formula, DeltaPos_W represents the position change parameter (eg, intermediate parameter). When the value of subAngleIdx is 2, the surrounding positions outside the current block, indicated by the weighted prediction angle, can be the surrounding positions in the row above the current block. Therefore, the position change parameter is designated as DeltaPos_W. For example, DeltaPos_W is determined by the following formula:

[199] Condition 4: If the value of subAngleIdx is 3, that is, the weighted prediction angle is in angle region 3, for example, the weighted prediction angle is weighted prediction angle 6 or weighted prediction angle 7, the starting position FirstPos of the weight transformation can be determined by the following formula: You can then determine the reference weights of the surrounding positions outside the current block using the following formula: The formula is given for a minimum reference weight value of 0, a maximum reference weight value of 8, and a weight conversion factor of 1, as an example, x can represent the index of surrounding positions outside the current block and ranges from 0 to ValidLength_W- 1.

[200] In the above formula, ValidLength_W and DeltaPos_W can be attributed to condition 3 and will not be repeated here.

[201] Thus, it is possible to determine which condition should be used based on subAngleIdx, for example, in conditions 1 and 2, ValidLength_H and DeltaPos_H are determined based on angleIdx and stepIdx, and FirstPos is determined based on ValidLength_H and DeltaPos_H, and then the reference weight values are configured based on FirstPos. In conditions 3 and 4, ValidLength-W and DeltaPos_W are determined based on angleIdx and stepIdx, and FirstPos are determined based on ValidLength_W and DeltaPos_W, and then the reference weights are configured based on FirstPos.

[202] The formulas of the above conditions differ as follows: when the upper left corner of the current block is used as the origin, the initial position of the reference weight value ReferenceWeights[x] is changed. For example, in FIG. 7C shows examples of corner region 2 and corner region 3. When 1/2 pixel precision is used, the starting position of the reference weight value that is, the offset in the formula is equal to "- Corner region 0 and corner region 1 are implemented in a similar way, except that the offset in the formula is equal to that is, the height changes by the width.

[203] In step a3, the brightness weight value of the pixel position is obtained based on angleIdx and the reference weight value ReferenceWeight[x].

[204] Condition 1: If the value of subAngleIdx is 0, the brightness weight value of the pixel position (x, y) can be determined by the following formula: Where represents the surrounding position indicated by the pixel position (x, y), represents the reference weight value of the surrounding position. The range of x values is from 0 to M-1, and the range of y values is from 0 to N-1.

[205] Condition 2: If the value of subAngleIdx is 1, the brightness weight value of the pixel position (x, y) can be determined by the following formula: Where represents the surrounding position indicated by the pixel position (x, y), represents the reference weight value of the surrounding position. The range of x values is from 0 to M-1, and the range of y values is from 0 to N-1.

[206] Condition 3: If the value of subAngleIdx is 2, the brightness weight value of the pixel position (x, y) can be determined by the following formula: Where ( represents the surrounding position indicated by the pixel position (x, y), represents the reference weight value of the surrounding position. The range of x values is from 0 to M-1, and the range of y values is from 0 to N-1.

[207] Condition 4: If the value of subAngleIdx is 3, the brightness weight value of the pixel position (x, y) can be determined by the following formula: Where represents the surrounding position indicated by the pixel position (x, y), represents the reference weight value of the surrounding position. The range of x values is from 0 to M-1, and the range of y values is from 0 to N-1.

[208] The above steps a2 and a3 can be combined into one step. For example, step a2 (configuring a reference weight value for surrounding positions outside the current block according to stepIdx, angleIdx and subAngleIdx) and step a3 (obtaining a brightness weight value according to angleIdx and a reference weight value ReferenceWeight[x]) can be combined as follows way: getting the weight value of the brightness of the pixel position in accordance with stepIdx, angleIdx and subAngleIdx, i.e. determined based on the coordinate values of the surrounding positions and the coordinate values of the starting position of the weight transformation.

[209] For example, with condition 1, if the value of subAngleIdx is 0, that is, the weighted prediction angle is in the 0 angle region, for example, the weighted prediction angle is weighted prediction angle 0 or weighted prediction angle 1, the starting position FirstPos of the weight transformation can be determined according to the following formula: Then the brightness weight value of the pixel position (x, y) is determined by the following formula: where (y<<1)+((x<<1)>>angleIdx) represents the surrounding corresponding position indicated by the pixel position (x, y). Other conditions are similar.

[210] In step a4, a chroma weight value for a pixel position is obtained based on a luminance weight value for a pixel position, and a luminance weight value for a pixel position and a chrominance weight value for a pixel position may form a target pixel position weight value.

[211] For example, if a 4:2:0 chroma resolution format is used, the chroma weight value of the pixel position (x, y) is determined by the following formula: In another example, if a 4:4:4 chroma resolution format is used, the pixel position (x, y) chroma weight is determined by the following formula: The range of x values is from 0 to M/2-1, and the range of y values is from 0 to N/2-1.

[212] Step a4 can be implemented in another way: instead of obtaining a chroma weight value based on a luma weight value, a chroma weight value for a pixel position is obtained based on angleIdx and a reference weight value ReferenceWeight[x]. For example, if a 4:2:0 chroma resolution format is used, the chroma weight value for a pixel position can be derived from angleIdx and a reference weight value ReferenceWeight[x].

[213] For example, if the value of subAngleIdx is 0, the chroma weight value of the pixel position (x, y) is determined by the following formula:

[214] For example, if the value of subAngleIdx is 1, the chromaticity weight value of the pixel position (x, y) is determined by the following formula:

[215] For example, if the value of subAngleIdx is 2, the chromaticity weight value of the pixel position (x, y) is determined by the following formula:

[216] For example, if the value of subAngleIdx is 3, the chromaticity weight value of the pixel position (x, y) is determined by the following formula:

[217] In the above formulas, the range of x is from 0 to M-1, and the range of y is from 0 to N-1.

[218] At stages a3 and a4, the formulas for the specified conditions differ as follows. In FIG. 7D shows examples of corner region 2 and corner region 3. When the upper left corner of the current block is taken as the origin, the formula for calculating the corresponding position (x, y) in corner region 2 can be x-y>>angleIdx, and the calculation formula for the corresponding position ( x, y) in corner area 3 can be x+y>>angleIdx. When 1/2 pixel precision is used, the formula for calculating the corresponding position (x, y) in corner region 2 can be (x<<1) - (y<<1)>>angleIdx, and the formula for calculating the corresponding position (x, y) in corner region 3 there can be (x<<1)+(y<<1)>>angleIdx. Corner region 0 and corner region 1 can be implemented in a similar way, except that the positions (x, y) are swapped.

[219] Embodiment 8 of the invention. In Embodiments 1 to 3, the encoder side or the decoder side expects to obtain the weight conversion coefficient of the current block. If the current block supports the weight conversion coefficient switching mode, the weight conversion coefficient of the current block is obtained as follows: obtaining the first weight conversion coefficient indication information for the current block, and determining the weight conversion coefficient of the current block based on the first weight conversion coefficient indication information. For example, if the first weight conversion coefficient indication information is the first indication information, the weight conversion coefficient of the current block is the first weight conversion coefficient; and if the first weight conversion factor indication information is the second indication information, the weight conversion factor of the current block is the second weight conversion factor. If the current block does not support the weight conversion coefficient switching mode, the predetermined weight conversion coefficient is determined as the weight conversion coefficient of the current block. The first weight conversion factor indication information may be obtained from the LCU, slice, image, sequence, etc., where the current block is located. For example, the first weight conversion coefficient indication information may be image level indication information, such as PPS level indication information, PH level indication information.

[220] Thus, if the current block supports a weight conversion coefficient switching mode, the weight transformation coefficient of the current block may be either a first weight transformation coefficient or a second weight transformation coefficient, and the first weight transformation coefficient is different from the second weight transformation coefficient. That is, the weight conversion factor of the current block is variable, so that the weight conversion factor can be switched adaptively instead of using a single weight conversion factor.

[221] For example, if the switching control information allows the current block to enable the weight conversion factor switching mode, the current block supports the weight conversion factor switching mode, and if the switching control information does not allow the current block to enable the weight conversion factor switching mode, the current block does not support the switching mode weight conversion factor. The switching control information may include, but is not limited to, sequence level switching control information, picture level switching control information, slice level switching control information, tile level switching control information, patch level switching control information, CTU layer switching control information, layer switching control information. LCU, block level switching control information, CU level switching control information, PU level switching control information, etc.

[222] The encoder side may be informed of the switching control information and whether the switching control information allows the current block to enable the weight conversion factor switching mode, and then determines whether the current block supports the weight conversion coefficient switching mode. The encoder side may encode the switching control information into a bit stream. That is, the decoder side can analyze the switching control information from the bit stream, obtain information about whether the switching control information allows the current block to enable the weight conversion factor switching mode, and then determine whether the current block supports the weight conversion factor switching mode. Instead of encoding the switching control information into a bit stream on the encoder side, the decoder side can implicitly obtain the switching control information to know whether the switching control information allows the current block to enable the weight conversion factor switching mode, and then determines whether the current block supports switching mode of the weight conversion coefficient.

[223] Taking the sequence level switching control information as an example, the sequence level switching control information may be awp_adptive_flag (angular outer weighted prediction adaptation flag bit). If awp_adptive_flag is the first value, it means that the sequence level switching control information allows the current sequence to enable the weight conversion factor switching mode, thereby allowing the current block to enable the weight conversion factor switching mode. If awp_adptive_flag is the second value, it means that the sequence level switching control information prevents the current sequence from enabling the weight conversion factor switching mode and thus prevents the current block from enabling the weight conversion factor switching mode. For example, the first value is 1 and the second value is 0, or the first value is 0 and the second value is 1. The above are only examples of the first value and the second value, and there is no limitation on them. For other types of switching control information, the implementation processes are similar to the implementation processes of sequence level switching control information and will not be repeated here.

[224] In an exemplary implementation, the first indication information of the weight conversion coefficient in the current block may be an SCC (Screen Content Coding) identification corresponding to the current block, the first indication information is for indicating that the current block belongs to a screen content coding, and the second indication information is for indicating that the current block belongs to non-screen content coding (non-SCC). Based on this, the SCC identification corresponding to the current block can be obtained, and the weight conversion factor of the current block can be determined based on the SCC identification. For example, if the SCC identification is to indicate that the current block belongs to the SCC, the weight conversion coefficient of the current block is the first weight conversion coefficient; and if the SCC identification is to indicate that the current block belongs to a non-SCC, the weight conversion coefficient of the current block is the second weight conversion coefficient.

[225] For example, the absolute value of the first weight conversion factor may be greater than the absolute value of the second weight conversion factor. For example, the absolute value of the first weights conversion factor may be 4, and the absolute value of the second weights conversion factor may be 1 or 2. In another example, the absolute value of the first weights conversion factor may be 2, and the absolute value of the second weights conversion factor may be is 1. In another example, the absolute value of the first weight conversion factor may be 8, and the absolute value of the second weight conversion factor may be 1, or 2, or 4. In another example, the absolute value of the first weight conversion factor may be 8 or 4, and the absolute value of the second weight conversion factor may be 1 or 2. The above are only examples that do not impose any restrictions, provided that the absolute value of the first weight conversion factor is greater than the absolute value of the second weight conversion factor.

[226] For example, SCC identification may include, but is not limited to: sequence level SCC identification, picture level SCC identification, slice level SCC identification, tile level SCC identification, patch level SCC identification, CTU level SCC identification, LCU level SCC identification, identification Block level SCC, CU level SCC identification, PU level SCC identification, etc., which are not limited here. For example, the sequence level SCC identification corresponding to the current block may be defined as the SCC identification corresponding to the current block, or the image level SCC identification corresponding to the current block may be defined as the SCC identification corresponding to the current block, etc. provided that the SCC identification corresponding to the current block can be obtained.

[227] For example, the encoder side can determine whether the current block belongs to SCC or non-SCC. If the current block belongs to the SCC, the encoder side determines the weight conversion coefficient of the current block as the first weight conversion coefficient. If the current block belongs to a non-SCC, the encoder side determines the weight conversion coefficient of the current block as the second weight conversion coefficient. Optionally, the SCC identification corresponding to the current block can be obtained for the encoder side, and if the SCC identification is to indicate that the current block belongs to the SCC, the encoder side determines the weight conversion coefficient of the current block as the first weight conversion coefficient. If the SCC identification is to indicate that the current block belongs to a non-SCC, the encoder side determines the weight conversion coefficient of the current block as the second weight conversion coefficient.

[228] The encoder side may encode the SCC identification (eg, sequence level SCC identification, picture level SCC identification, slice level SCC identification, etc.) into a bitstream. That is, the decoder side can analyze the SCC identification from the bit stream and determine the SCC identification as the SCC identification corresponding to the current block, for example, the sequence level SCC identification corresponding to the current block can be determined as the SCC identification corresponding to the current block. To summarize, the SCC identification corresponding to the current block may be reported to the decoder side. If the SCC identification is to indicate that the current block belongs to the SCC, the decoder side determines the weight conversion coefficient of the current block as the first weight conversion coefficient. If the SCC identification is to indicate that the current block belongs to a non-SCC, the decoder side determines the weight conversion coefficient of the current block as the second weight conversion coefficient. For example, if the SCC identification is a first value, it is intended to indicate that the current block belongs to an SCC, and if the SCC identification is a second value, it is intended to indicate that the current block belongs to a non-SCC. The first value is 1 and the second value is 0, or the first value is 0 and the second value is 1. The above are only examples of the first value and the second value, and there are no restrictions on them.

[229] Instead of encoding the SCC identification into a bitstream, the encoder side can implicitly obtain the SCC identification using the same information as the decoder side. Thus, the decoder side can also implicitly obtain the SCC identification and determine the SCC identification as the SCC identification corresponding to the current block. For example, if several consecutive pictures all use SCC, the current picture can be obtained using SCC, so the decoder side implicitly outputs the SCC identification of the picture layer and defines the SCC identification as the SCC identification corresponding to the current block, and the SCC identification is intended to indicate that the current block belongs to SCC. For example, if several consecutive pictures are used as non-SCC, the current non-SCC picture can be obtained, thus the decoder side implicitly outputs the SCC identification of the picture layer, and the SCC identification is intended to indicate that the current block belongs to the non-SCC. For example, if the proportion of the IBC mode among all selected modes in the current picture is less than a certain percentage, the next picture is determined to be non-SCC, otherwise the next picture is determined to be SCC. The methods described above are only examples of implicit acquisition of SCC identification, and there are no restrictions on implicit acquisition methods. To summarize, the decoder side can obtain the SCC identification corresponding to the current block. If the SCC identification is to indicate that the current block belongs to screen content encoding, the decoder side determines the weight conversion coefficient of the current block as the first weight conversion coefficient. If the SCC identification is to indicate that the current block belongs to non-screen content encoding, the decoder side determines the weight conversion coefficient of the current block as the second weight conversion coefficient. For example, if the SCC identification is a first value, it is intended to indicate that the current block belongs to an SCC, and if the SCC identification is a second value, it is intended to indicate that the current block belongs to a non-SCC.

[230] Thus, the weight conversion factor of the current block may be a first weight conversion factor or a second weight conversion factor. That is, the weight conversion factor of the current block can be switched, and the switching of the weight conversion factor depends on the explicit identification of the SCC or the implicit identification of the SCC of a certain level. Explicit SCC identification means that the scc_flag (SCC identification) is encoded in the bitstream so that the decoder side parses the SCC identification from the bitstream, and implicit SCC identification means that the decoder side adaptively obtains the SCC identification based on the information available to the decoder side.

[231] Specific level SCC identification includes: sequence level SCC identification to indicate the current sequence, which is used as the SCC identification of all blocks belonging to the current sequence; a picture level identification SCC for indicating the current picture, which is used as the SCC identification of all blocks belonging to the current picture; a slice level SCC identification to indicate the current slice, which is used as the SCC identification of all blocks belonging to the current slice; a tile-level SCC identification for indicating the current tile, which is used as the SCC identification of all blocks belonging to the current tile; a patch level SCC identification for indicating the current patch, which is used as the SCC identification of all blocks belonging to the current patch; a CTU level SCC identification to indicate the current CTU, which is used as the SCC identification of all blocks belonging to the current CTU; an LCU layer SCC identification to indicate the current LCU, which is used as the SCC identification of all blocks belonging to the current LCU; a block level SCC identification for indicating the current block, which is used as the SCC identification of all blocks belonging to the current block; a CU-level SCC identification to indicate the current CU, which is used as the identification of an SCC belonging to the current CU; and a PU layer SCC identification to indicate the current PU, which is used as the identification of an SCC belonging to the current PU.

[232] For example, the second weight conversion factor can be used as the default weight conversion factor, and there is no need to switch the weight conversion factor when the SCC identification is intended to indicate that the current block belongs to a non-SCC, i.e. the current block's weight conversion factor is defined as the second weight conversion factor. When the SCC identification is to indicate that the current block belongs to the SCC, the weight conversion coefficient is expected to be switched, that is, the weight conversion coefficient of the current block is determined as the first weight conversion coefficient. Optionally, the first weight conversion factor can be used as the default weight conversion factor, and it is expected that the weight conversion factor will be switched when the SCC identification is to indicate that the current block belongs to a non-SCC, that is, the weight conversion factor of the current block is determined as the second weight conversion factor. When the SCC identification is to indicate that the current block belongs to the SCC, there is no need to switch the weight conversion factor, that is, the weight conversion factor of the current block is determined as the first weight conversion factor.

[233] For example, in FIG. 8A is a schematic diagram of an SCC sequence (eg, a sequence belonging to the SCC). In FIG. 8B illustrates a schematic diagram of a natural sequence (eg, a sequence belonging to a non-SCC). For SCC sequences, the color change is completed after one pixel, while for natural sequences, the color change takes a transition of several pixels. To summarize, it can be seen that SCC sequences typically have characteristics such as constant color over large areas and rapid color changes, and weighted prediction for SCC sequences must also adapt to such characteristics. Therefore, the weight value of the AWP mode should reduce the smooth transition characteristics, that is, the weight conversion factor should be increased to adapt to the characteristics of SCC sequences. Thus, when the current block belongs to SCC, the current block's weight conversion factor is the first weight conversion factor, and when the current block belongs to a non-SCC, the current block's weight conversion factor is the second weight conversion factor, and the absolute value of the first weight conversion factor is greater than, than the absolute value of the second weight conversion factor. For example, the absolute value of the first weight conversion coefficient is 4, and the absolute value of the second weight conversion coefficient is 1. Thus, the absolute value of the weight conversion coefficient of the current block belonging to the SCC sequence is increased, that is, the conversion speed is increased. For example, the increase in efficiency (e.g., increase in efficiency by BD factor) in actual verification for the SCC sequence is shown in Table 3, which shows the increase in efficiency when switching the weight conversion factor from 1 to 4. As shown in Table 3, for the Y channel component of the SCC sequence 1, an efficiency increase in the BD coefficient of -1.83% can be obtained when switching the weight conversion factor from 1 to 4, which is equivalent, under the same objective quality conditions, to a 1.83% decrease in the encoding rate when switching the weight conversion factor. For the U channel component of SCC sequence 1, the encoding rate can be reduced by 1.19% when switching the weight conversion factor from 1 to 4, and for the V channel component of SCC sequence 1, the coding rate can be reduced by 1.05% when switching the weight conversion factor from 1 to 4. When the weight conversion factor is switched from 1 to 4, the encoding complexity on the encoder side remains unchanged, and the decoding complexity on the decoder side increases to 101%. For other SCC sequences, the encoding rate may also be reduced when the weight conversion factor is switched from 1 to 4. Thus, the increase in efficiency may be greater.

[234] In another possible implementation, the first weight conversion factor indication information in the current block may be a weight conversion factor switching identification corresponding to the current block, wherein the first indication information is for indicating that the current block does not require weight conversion factor switching, and the second indication information is intended to indicate that the current block requires switching the weight conversion factor. Based on this, the weight conversion coefficient switching identification corresponding to the current block can be obtained, and the weight conversion coefficient of the current block can be determined in accordance with the weight conversion coefficient switching identification. For example, if the weight conversion factor switching identification is to indicate that the current block does not require a weight conversion factor switching, the weight conversion factor of the current block may be the first weight conversion factor. If the weight conversion factor switching identification is to indicate that the current block requires a weight conversion factor switching, the weight conversion factor of the current block may be a second weight conversion factor. The absolute value of the first weight conversion factor is not equal to the absolute value of the second weight conversion factor. For example, the absolute value of the first weight conversion factor may be greater than the absolute value of the second weight conversion factor. For example, the absolute value of the first weights conversion factor may be 4, and the absolute value of the second weights conversion factor may be 1 or 2. Alternatively, the absolute value of the first weights conversion factor may be 2, and the absolute value of the second weights conversion factor may be 1. Alternatively, the absolute value of the first weight conversion factor may be 8, and the absolute value of the second weight conversion factor may be 1, 2, or 4. In another example, the absolute value of the first weight conversion factor may be less than the absolute value of the second conversion factor scales For example, the absolute value of the first weight conversion factor may be 1, and the absolute value of the second weight conversion factor may be 2, 4, or 8. Alternatively, the absolute value of the first weight conversion factor may be 2, and the absolute value of the second weight conversion factor may be be equal to 4 or 8. Alternatively, the absolute value of the first weight conversion factor may be equal to 4, and the absolute value of the second weight conversion factor may be equal to 8. The above are examples only and no limitation is imposed provided that the absolute value of the first weight conversion factor is not equal to the absolute value of the second weight conversion coefficient.

[235] For example, identifying a weight conversion factor switching may include, but is not limited to, identifying a sequence-level weights conversion factor switching, identifying a picture-level weights conversion factor switching, identifying a slice-level weights conversion factor switching, identifying a tile-level weights conversion factor switching, identifying patch level weights conversion factor switching identification, CTU level weights conversion factor switching identification, LCU level weights conversion factor switching identification, block level weights conversion factor switching identification, CU level weights conversion factor switching identification, PU level weights conversion factor switching identification, etc. etc., which is not limited here.

[236] For example, the sequence-level weights conversion coefficient switching identification corresponding to the current block may be defined as the weights conversion coefficient switching identification corresponding to the current block, or the image-level weights conversion coefficient switching identification corresponding to the current block may be defined as the switching identification the weight conversion coefficient corresponding to the current block, etc., provided that the weight conversion coefficient switching identification corresponding to the current block can be obtained.

[237] For example, the first weight conversion factor may be used as the default weight conversion factor, and the encoder side may be informed whether the current switch block requires a weight conversion factor. If the current block does not require switching the weight conversion factor, the encoder side determines the weight conversion factor of the current block as the first weight conversion factor. If the current block requires switching the weight conversion factor, the encoder side determines the current block's weight conversion factor as the second weight conversion factor. Optionally, the encoder side may be informed of a weight conversion factor switching identification corresponding to the current block, and if the weight conversion factor switching identification is intended to indicate that the current block does not require a weight conversion factor switching, the encoder side may determine that the weight conversion factor of the current block is the first weight conversion factor. If the weight conversion factor switching identification is to indicate that the current block requires a weight conversion factor switching, the encoder side determines that the weight conversion factor of the current block is the second weight conversion factor.

[238] For example, the encoder side determines an RDO cost value 1 corresponding to the first weight conversion factor and an RDO cost value 2 corresponding to the second weight conversion factor. If RDO cost value 1 is less than RDO cost value 2, the encoder side determines a current block that does not require weight conversion factor switching, and if RDO cost value 2 is less than RDO cost value 1, the encoder side determines a current block that requires weight conversion factor switching.

[239] The encoder side may encode the weight conversion coefficient switching identification (eg, the sequence-level weights conversion coefficient switching identification, etc.) into the bitstream, causing the decoder side to analyze the weights conversion coefficient switching identification from the bitstream and determine this coefficient switching identification. weight conversion as the weight conversion coefficient switching identification corresponding to the current block. Thus, the weight conversion coefficient switching identification corresponding to the current block can be communicated to the decoder side. If this weight conversion coefficient switching identification is to indicate that the current block does not require weight conversion coefficient switching, the decoder side determines the weight conversion coefficient of the current block as the first weight conversion coefficient. If the weight conversion coefficient switching identification is to indicate that the current block requires a weight conversion coefficient switching, the decoder side determines that the weight conversion coefficient of the current block is the second weight conversion coefficient. For example, if the weight conversion factor switching identification is the first value, it indicates that the current block does not require a weight conversion factor switching, and if the weight conversion factor switching identification is the second value, it indicates that the current block requires a conversion factor switching scales The first value is 1 and the second value is 0, or the first value is 0 and the second value is 1. The above is only an example of the first value and the second value, and there is no limitation on it.

[240] Instead of encoding the weight conversion factor switching identification into the bitstream at the encoder side, the decoder side may implicitly obtain the weight conversion factor switching identification and define this weight conversion factor switching identification as the weight conversion factor switching identification corresponding to the current block. For example, if several consecutive blocks all require a weight conversion factor switch, the current block may also require a weight conversion factor switch. That is, the decoder side implicitly outputs the weight conversion factor switching identification and determines the weight conversion factor switching identification as the weight conversion factor switching identification corresponding to the current block, and the weight conversion factor switching identification indicates that the current block requires weight conversion factor switching. If all multiple consecutive blocks do not require a weight conversion factor switch, the current block may also not require a weight conversion factor switch. Thus, the decoder side implicitly outputs the weight conversion factor switching identification, and the weight conversion factor switching identification indicates that the current block does not require weight conversion factor switching. The methods described above are only examples of implicitly obtaining the weight conversion coefficient switching identification, and there are no restrictions on the acquisition methods. Thus, the weight conversion coefficient switching identification corresponding to the current block can be communicated to the decoder side. If the weight conversion factor switching identification indicates that the current block does not require weight conversion factor switching, the weight conversion factor of the current block is determined as the first weight conversion factor. If the weight conversion factor switching identification indicates that the current block requires a weight conversion factor switching, the weight conversion factor of the current block is determined as the second weight conversion factor.

[241] Thus, the weight refine factor of the current block may be the first weight refashion factor or the second weight refashion factor, that is, the weight refine factor of the current block may be switched, and the switching of the weight refashion factor depends on the switch identification of the weight refine_flag of a certain level , refine_flag can be an explicit or implicit identification. Explicit identification means that the refine_flag is encoded in the bit stream, causing the decoder side to parse the refine_flag from the bit stream, and implicit identification means that the encoder side and the decoder side adaptively obtain the refine_flag based on the information that can be obtained.

[242] For example, a specific level refine_flag includes: a sequence level refine_flag to indicate the current sequence, which is used as the refine_flag for all blocks belonging to the current sequence; image level refine_flag to indicate the current image, which is used as the refine_flag of all blocks belonging to the current image; slice-level refine_flag to indicate the current slice, which is used as the refine_flag of all blocks belonging to the current slice; tile-level refine_flag to indicate the current tile, which is used as the refine_flag of all blocks belonging to the current tile; patch level refine_flag to indicate the current patch, which is used as the refine_flag of all blocks belonging to the current patch; CTU level refine_flag to indicate the current CTU, which is used as the refine_flag for all blocks belonging to the current CTU; LCU level refine_flag to indicate the current LCU, which is used as the refine_flag for all blocks belonging to the current LCU; block-level refine_flag to indicate the current block, which is used as the refine_flag of all blocks belonging to the current block; CU level refine_flag to indicate the current CU, which is used as the refine_flag belonging to the current CU; and PU level refine_flag to indicate the current PU, which is used as the refine_flag belonging to the current PU. The above are just examples and there are no restrictions.

[243] For example, the first weight conversion factor may be used as the default weight conversion factor. When the weight conversion coefficient switching identification is to indicate that the current block does not require weight conversion coefficient switching, weight conversion coefficient switching is not performed for the current block, that is, the weight conversion coefficient of the current block is determined as the first weight conversion coefficient. When the weight conversion coefficient switching identification is to indicate that the current block requires a weight conversion coefficient switching, the weight conversion coefficient is switched, that is, the weight conversion coefficient of the current block is determined as the second weight conversion coefficient.

[244] Embodiment 9 of the invention. In Embodiments 1 to 3, the encoder side or the decoder side expects to obtain the weighted prediction angle and the weighted prediction position of the current block, and in Embodiment 8, a weight conversion coefficient such as a first weight conversion coefficient or a second weight conversion coefficient can be obtained. Based on this, the weighted prediction angle and the weighted prediction position of the current block are obtained by the following methods.

[245] In the first method, the encoder side and the decoder side agree to accept the same weighted prediction angle as the weighted prediction angle of the current block, and agree to accept the same weighted prediction position as the weighted prediction position predictions of the current block. For example, both the encoder side and the decoder side receive the weighted prediction angle A as the weighted prediction angle of the current block, and receive the weighted prediction position 4 as the weighted prediction position of the current block.

[246] In the second method, the encoder side constructs a list of weighted prediction angles, which may include at least one weighted prediction angle, for example, the list of weighted prediction angles may include weighted prediction angle A and weighted prediction angle B. The encoder side constructs a list of weighted prediction positions, which may include at least one weighted prediction position, for example, the list of weighted prediction positions may include weighted prediction positions 0 to 6. The encoder side sequentially goes through each weighted prediction angle in the list of weighted prediction angles and sequentially traverses each weighted prediction position in the list of weighted prediction positions, that is, traverses a combination of each weighted prediction angle and each weighted prediction position. For each combination of weighted prediction angle(s) and weighted prediction position(s), the weighted prediction angle and weighted prediction position in the combination may be taken as the weighted prediction angle and weighted prediction position of the current block obtained in step 401, and steps 402 through 408 is performed based on the weighted prediction angle, the weighted prediction position, and the weight conversion factor (obtained in Embodiment 8) to obtain the weighted prediction value of the current block.

[247] For example, when the encoder side moves to the weighted prediction angle A and the weighted prediction position 0, the encoder side performs steps 402-408 based on the weighted prediction angle A and the weighted prediction position 0 to obtain the weighted prediction value A-0 of the current block. When the encoder side moves to the weighted prediction angle A and the weighted prediction position 1, steps 402 to 408 are performed based on the weighted prediction angle A and the weighted prediction position 1 to obtain the weighted prediction value A-1 of the current block. When the encoder side moves to the weighted prediction angle B and the weighted prediction position 0, steps 402-408 are performed based on the weighted prediction angle B and the weighted prediction position 0 to obtain the weighted prediction value B-0 of the current block, etc. The encoder side can obtain the corresponding weighted prediction value based on each combination (each combination of weighted prediction angle and weighted prediction position).

[248] After obtaining all the weighted prediction values based on the combination of the weighted prediction angle(s) and the weighted prediction position(s), the encoder side may determine the corresponding RDO cost value based on each weighted prediction value in any unrestricted manner. The encoder side may obtain the RDO cost value for each combination and select the minimum RDO cost value from all the RDO cost values.

[249] Then, the encoder side takes the weighted prediction angle and the weighted prediction position in the combination corresponding to the minimum RDO cost value as the weighted prediction target angle and the weighted prediction target position, respectively, and finally encodes the weighted prediction target angle index value in the angle list weighted prediction and an index value of the weighted prediction target position in the list of weighted prediction positions in the bitstream.

[250] The methods described above are only illustrative and do not limit the invention, provided that the weighted prediction angle and weighted prediction position of the current block can be obtained. For example, one weighted prediction angle may be randomly selected from the list of weighted prediction angles as the weighted prediction angle of the current block, and one weighted prediction position may be randomly selected from the list of weighted prediction positions as the weighted prediction position of the current block.

[251] The decoder side creates a list of weighted prediction angles that is identical to the list of weighted prediction angles on the encoder side and includes at least one weighted prediction angle such as weighted prediction angle A and weighted prediction angle B. The decoder side constructs a list of weighted prediction positions that is identical to the list of weighted prediction positions at the encoder side and includes at least one weighted prediction position such as weighted prediction position 0 to 6. After receiving the encoded bit stream of the current block, the decoder side analyzes the indication information from the encoded bit stream, selects a weighted prediction angle from the list of weighted prediction angles as a weighted prediction angle of the current block according to the indication information, and selects a weighted prediction position from the list of weighted prediction positions as a weighted prediction position of the current block according to the indication information.

[252] Application Scenario 1: When the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream may include indication information 1 used to indicate both the weighted prediction angle of the current block (that is, the target weighted prediction angle) and the weighted prediction position the current block (i.e., the target position of the weighted prediction). For example, when the indication information 1 is 0, the indication information 1 may indicate the first weighted prediction angle in the weighted prediction angle list and the first weighted prediction position in the weighted prediction position list; when the indication information 1 is 1, the indication information 1 may indicate the first weighted prediction angle in the weighted prediction angle list and the second weighted prediction position in the weighted prediction position list, etc., there is no limitation on the value of the indication information 1 that is used to indicate the weighted prediction angle and the weighted prediction position if the encoder side and the decoder side have agreed on it.

[253] After receiving the encoded bitstream, the decoder side decodes indication information 1 from the encoded bitstream. Based on the indication information 1, the decoder side may select the weighted prediction angle corresponding to the indication information 1 from the list of weighted prediction angles and take the weighted prediction angle as the weighted prediction angle of the current block. Based on the indication information 1, the decoder side can select the weighted prediction position corresponding to the indication information 1 from the list of weighted prediction positions and accept the weighted prediction position as the weighted prediction position of the current block.

[254] Application Scenario 2: When the encoder side transmits a coded bit stream to the decoder side, the coded bit stream may include indication information 2 and indication information 3. The indication information 2 is for indicating the target weighted prediction angle of the current block, for example, the target weighted prediction angle index value 1 in the weighted prediction angle list, where the index value 1 indicates which weighted prediction angle in the weighted prediction angle list is the target weighted prediction angle. The indication information 3 is for indicating the weighted prediction target position of the current block, for example, an index value 2 of the weighted prediction target position in the weighted prediction position list, wherein the index value 2 indicates which weighted prediction position in the weighted prediction position list is the weighted prediction target position. After receiving the coded bit stream, the decoder side analyzes the indication information 2 and the indication information 3 from the coded bit stream. Based on the indication information 2, the decoder side can select the weighted prediction angle corresponding to the index value 1 from the list of weighted prediction angles and take the weighted prediction angle as the weighted prediction angle of the current block. Based on the indication information 3, the decoder side can select the weighted prediction position corresponding to the index value 2 from the list of weighted prediction positions and accept the weighted prediction position as the weighted prediction position of the current block.

[255] Application Scenario 3: The encoder side and the decoder side may agree on a preferred configuration combination. The preferred configuration combination may be configured according to practical experience and is not limited here. For example, a preferred configuration combination 1 including a weighted prediction angle A and a weighted prediction position 4, a preferred configuration combination 2 including a weighted prediction angle B and a weighted prediction position 4, and the like may be agreed upon.

[256] After determining the weighted prediction target angle and the weighted prediction target position of the current block, the encoder side determines whether the combination of the weighted prediction target angle and the weighted prediction target position belongs to the preferred configuration combination. If the combination is a preferred configuration combination when the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream may include indication information 4 and indication information 5. The indication information 4 is for indicating whether a preferred configuration combination is used for the current block. For example, when the indication information 4 is a first value (eg, 0), the indication information 4 indicates that the preferred configuration combination is used for the current block. The indication information 5 indicates which preferred configuration combination is used for the current block. For example, when the value of the guidance information 5 is 0, the guidance information 5 may indicate that the preferred configuration combination 1 is used for the current block, and when the value of the guidance information 5 is 1, the guidance information 5 may indicate that the preferred configuration combination 2 is used for the current block .

[257] After receiving the coded bit stream, the decoder side can analyze the indication information 4 and the indication information 5 from the coded bit stream. Based on the indication information 4, the decoder side can determine whether a preferred configuration combination is used for the current block. If the indication information 4 is the first value, the decoder side determines that the preferred configuration combination is used for the current block. When a preferred configuration combination is used for the current block, the decoder side can determine which preferred configuration combination is used for the current block based on the indication information 5. For example, when the value of the indication information 5 is 0, the decoder side may determine that the preferred configuration combination 1 is used for the current block, for example, the weighted prediction angle of the current block is the weighted prediction angle A, and the weighted prediction position of the current block is the weighted prediction position 4 predictions. In another example, when the value of the indication information 5 is 1, the decoder side may determine that the preferred configuration combination 2 is used for the current block, for example, the weighted prediction angle of the current block is the weighted prediction angle B, and the weighted prediction position of the current block is the position 4 weighted predictions.

[258] For example, if the encoder side and the decoder side agree on only one preferred configuration combination, for example, a preferred configuration combination including weighted prediction angle A and weighted prediction position 4, the encoded bitstream may include only indication information 4 without indication information 5, when Here, the indication information 4 is intended to indicate that a preferred configuration combination is used for the current block. After the decoder side analyzes the indication information 4 from the encoded bitstream, if the indication information 4 is the first value, the decoder side determines that the preferred configuration combination is used for the current block. Based on this preferred combination, the decoder side determines that the weighted prediction angle of the current block is the weighted prediction angle A, and the weighted prediction position of the current block is the weighted prediction position 4.

[259] Application Scenario 4: The encoder side and the decoder side can agree on a preferred configuration combination. After determining the weighted prediction target angle and the weighted prediction target position of the current block, the encoder side can determine whether the combination of the weighted prediction target angle and the weighted prediction target position belongs to the preferred configuration combination. If it does not belong to the preferred configuration combination, when the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream may include indication information 4 and indication information 6. The indication information 4 is for indicating that a preferred configuration combination is used for the current block. If the indication information 4 is a second value (eg, 1), the indication information 4 may indicate that the preferred configuration combination is not used for the current block. The indication information 6 is for indicating both the weighted prediction target angle of the current block and the weighted prediction target position of the current block. For example, when the value of the indication information 6 is 0, the indication information 6 is used to indicate the first weighted prediction angle in the weighted prediction angle list and the first weighted prediction position in the weighted prediction position list, etc.

[260] After receiving the coded bit stream, the decoder side can analyze the indication information 4 and the indication information 6 from the coded bit stream. Based on the indication information 4, the decoder side can determine whether a preferred configuration combination is used for the current block. If the indication information 4 is the second value, the decoder side determines that the preferred configuration combination is not used for the current block. When the preferred configuration combination is not used for the current block, the decoder side may, based on the indication information 6, select a weighted prediction angle corresponding to the indication information 6 from the list of weighted prediction angles, and take the weighted prediction angle as the weighted prediction angle of the current block; and based on the indication information 6, the decoder side can select the weighted prediction position corresponding to the indication information 6 from the list of weighted prediction positions and accept the weighted prediction position as the weighted prediction position of the current block.

[261] Application Scenario 5: The encoder side and the decoder side can agree on a preferred configuration combination. After determining the weighted prediction target angle and the weighted prediction target position of the current block, the encoder side can determine whether the combination of the weighted prediction target angle and the weighted prediction target position is a preferred configuration combination. If the combination does not belong to the preferred configuration combination, when the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream may include indication information 4, indication information 7 and indication information 8. For example, the indication information 4 is for indicating whether a preferred configuration combination is used for the current block. If the indication information 4 is the second value, the indication information 4 may indicate that the preferred configuration combination is not used for the current block. The indication information 7 is for indicating the target weighted prediction angle of the current block, for example, the target weighted prediction angle index value 1 in the weighted prediction angle list, where the index value 1 indicates which weighted prediction angle in the weighted prediction angle list is the target weighted prediction angle. The indication information 8 is for indicating the weighted prediction target position of the current block, for example, an index value 2 of the weighted prediction target position in the weighted prediction position list, wherein the index value 2 indicates which weighted prediction position in the weighted prediction position list is the weighted prediction target position.

[262] After receiving the encoded bitstream, the decoder side can analyze the indication information 4, indication information 7 and indication information 8 from the encoded bitstream. Based on the indication information 4, the decoder side can determine whether a preferred configuration combination is used for the current block. If the indication information 4 is the second value, the decoder side determines that the preferred configuration combination is not used for the current block. When the preferred configuration combination is not used for the current block, the decoder side may, based on the indication information 7, select the weighted prediction angle corresponding to the index value 1 from the weighted prediction angle list, and take the weighted prediction angle as the weighted prediction angle of the current block. Based on the indication information 8, the decoder side can select the weighted prediction position corresponding to the index value 2 from the list of weighted prediction positions and accept the weighted prediction position as the weighted prediction position of the current block.

[263] Embodiment 10 of the invention. In Embodiments 1 to 3, the encoder side or the decoder side expects to obtain the weight conversion coefficient of the current block. If the current block supports the weight conversion coefficient switching mode, the weight conversion coefficient of the current block is obtained as follows: obtain the second weight conversion coefficient indication information for the current block, and select the weight conversion coefficient corresponding to the second weight conversion coefficient indication information from a predetermined lookup table; wherein the given lookup table includes at least two weight conversion factors. The selected weight conversion factor is defined as the weight conversion factor of the current block.

[264] Since the predetermined lookup table includes at least two weight conversion coefficients, if the current block supports a weight conversion coefficient switching mode, the weight conversion coefficient of the current block can be selected from the at least two weight conversion coefficients. That is, the weight conversion factor of the current block is variable, so that the weight conversion factor can be switched adaptively instead of using a single weight conversion factor.

[265] For example, if the switching control information allows the current block to enable the weight conversion factor switching mode, the current block supports the weight conversion factor switching mode, and if the switching control information does not allow the current block to enable the weight conversion factor switching mode, the current block does not support the switching mode weight conversion factor. See Embodiment 8 for a description of whether the current block supports the weight conversion factor switching mode.

[266] In an exemplary implementation, the predefined lookup table may include at least two weight conversion factors, and the second weight conversion factor indication information may include weight conversion factor index information (to indicate a specific weight conversion factor among all weight conversion factors in the lookup table ). Based on this, the weight conversion coefficient corresponding to the weight conversion coefficient index information can be selected from the lookup table.

[267] At the encoder side, if there is only one lookup table, for each weight conversion factor in the lookup table, the encoder side may determine the RDO cost value corresponding to the weight conversion factor, and take the weight conversion factor corresponding to the minimum RDO cost value as target weight conversion factor of the current block. Then, the encoder side determines target weight conversion factor index information from the lookup table, for example, weight conversion factor index information, wherein the weight conversion factor index information represents the target weight conversion factor in the lookup table.

[268] For the decoder side, if there is only one lookup table, when the encoder side transmits the encoded bitstream of the current block to the decoder side, the encoded bitstream may carry weight conversion coefficient index information, which is intended to indicate index information of the target weight conversion coefficient in the lookup table. The decoder side selects the weight conversion coefficient corresponding to the weight conversion coefficient index information from the lookup table as the target weight conversion coefficient of the current block.

[269] In another possible implementation, a predefined lookup table may include at least two lookup tables, and each lookup table may include at least one weight conversion factor. The second weight conversion factor indication information may include lookup table index information (for specifying a specific lookup table in all lookup tables) and weight conversion factor index information (for indicating a specific weight conversion factor among all weight conversion coefficients in the lookup table). Based on this, a target lookup table corresponding to the lookup table index information can be selected from the at least two lookup tables, and a weight conversion coefficient corresponding to the weight conversion coefficient index information can be selected from the target lookup table.

[270] For example, a predetermined lookup table may include a first lookup table and a second lookup table, and the maximum value of the absolute values of the weights transformation coefficients included in the second lookup table is greater than the maximum value of the absolute values of the weights transformation coefficients included in the first lookup table . For example, the absolute values of the conversion factors of the weights included in the second lookup table are 4 and 8, and the absolute values of the conversion factors of the weights included in the first lookup table are 5 and 7. The maximum value of the absolute values of the conversion factors of the weights included in the second lookup table , is 8, and the maximum value of the absolute values of the weights conversion factors included in the first lookup table is 7. The absolute values of the weights conversion factors included in the second lookup table are not identical to the absolute values of the weights conversion factors included in the first lookup table. For example, the absolute values of the conversion factors of the weights included in the second lookup table are 4 and 8, and the absolute values of the conversion factors of the weights included in the first lookup table are 1, 2, and 4, while the absolute values of the conversion factors of the weights included in the two lookup tables are not identical. Optionally, the absolute values of the weight conversion coefficients included in the second lookup table are completely different from the absolute values of the weight conversion coefficients included in the first lookup table. For example, the absolute values of the conversion factors of the weights included in the second lookup table are 4 and 8, and the absolute values of the conversion factors of the weights included in the first lookup table are 1 and 2, while the absolute values of the conversion factors of the weights included in the two lookup tables are , are completely different.

[271] For example, the second weight conversion factor indication information includes lookup table index information and weight conversion factor index information. The lookup table index information may be an SCC identification corresponding to the current block, and the SCC identification is for indicating that the current block belongs to a screen content encoding, or the SCC identification is for indicating that the current block belongs to a non-screen content encoding. If the SCC identification is intended to indicate that the current block belongs to a non-screen content encoding, the target lookup table corresponding to the SCC identification may be the first lookup table. If the SCC identification is intended to indicate that the current block belongs to a screen content encoding, the target lookup table corresponding to the SCC identification may be a second lookup table.

[272] In this way, the SCC identification (eg, lookup table index information) and weight conversion coefficient index information corresponding to the current block can be obtained. If the SCC identification is to indicate that the current block belongs to non-screen content encoding, the target lookup table is determined as the first lookup table, the weight conversion coefficient corresponding to the weight transformation coefficient index information is selected from the first lookup table, and the selected weight conversion coefficient is determined as the conversion factor for the weights of the current block. If the SCC identification is to indicate that the current block belongs to screen content encoding, the target lookup table is determined as the second lookup table, and the weight conversion coefficient corresponding to the weight conversion coefficient index information is selected from the second lookup table, and the selected weight conversion coefficient is determined as the conversion factor of the current block's weights. In this way, the conversion factor of the weights of the current block can be obtained.

[273] The encoder-side process for obtaining the SCC identification may relate to Embodiment 8 and will not be repeated here.

[274] If the SCC identification is intended to indicate that the current block belongs to a non-screen content encoding, the target lookup table may be the first lookup table. For each weight conversion factor in the first lookup table, the encoder side determines the RDO cost value corresponding to the weight conversion factor, and takes the weight conversion factor corresponding to the minimum RDO cost value as the target weight conversion factor of the current block. The encoder side determines the index information of the target weight conversion factor from the first lookup table, that is, the weight conversion factor index information. If the SCC identification is intended to indicate that the current block belongs to a screen content encoding, the target lookup table may be a second lookup table. For each weight conversion factor in the second lookup table, the encoder side determines the RDO cost value corresponding to the weight conversion factor, and takes the weight conversion factor corresponding to the minimum RDO cost value as the target weight conversion factor of the current block. The encoder side determines the index information of the target weight conversion coefficient from the second lookup table, that is, the weight conversion coefficient index information, and the weight conversion coefficient index information indicates what the determined weight conversion coefficient is in the second lookup table.

[275] The decoder side process for obtaining the SCC identification can be seen in Embodiment 8 and will not be repeated here.

[276] When the encoder side transmits the encoded bitstream of the current block to the decoder side, the encoded bitstream may carry weight conversion coefficient index information, which is for indicating index information of the target weight conversion coefficient in the first lookup table or the second lookup table. If the SCC identification is intended to indicate that the current block belongs to a non-screen content encoding, the target lookup table may be the first lookup table.

The decoder side selects a weight conversion coefficient corresponding to the weight conversion coefficient index information (the weight conversion coefficient index information indicates what the weight conversion coefficient in the first lookup table is) from the first lookup table, which is taken as the weight conversion coefficient of the current block. If the SCC identification is intended to indicate that the current block belongs to a screen content encoding, the target lookup table may be a second lookup table. The decoder side selects a weight conversion coefficient corresponding to the weight conversion coefficient index information (the weight conversion coefficient index information indicates what the weight conversion coefficient in the second lookup table is) from the second lookup table, which is taken as the weight conversion coefficient of the current block.

[277] Embodiment 11 of the invention. In Embodiments 1 to 3, the encoder side or the decoder side expects to obtain the weighted prediction angle, the weighted prediction position, and the weight conversion coefficient of the current block, and in Embodiment 10, the weight conversion coefficient can be obtained. Based on this, the weighted prediction angle and the weighted prediction position of the current block are obtained by the following methods.

[278] In the first method, the encoder side and the decoder side agree to accept the same weighted prediction angle as the weighted prediction angle of the current block, and agree to accept the same weighted prediction position as the weighted prediction position predictions of the current block. For example, both the encoder side and the decoder side receive the weighted prediction angle A as the weighted prediction angle of the current block, and receive the weighted prediction position 4 as the weighted prediction position of the current block.

[279] In the second method, the encoder side constructs a list of weighted prediction angles, which may include at least one weighted prediction angle, for example, the list of weighted prediction angles may include weighted prediction angle A and weighted prediction angle B. The encoder side constructs a list of weighted prediction positions, which may include at least one weighted prediction position, for example, the list of weighted prediction positions may include weighted prediction positions 0 to 6. The encoder side constructs at least two lookup tables, for example, a first lookup table and a second lookup table, wherein the first lookup table includes at least one weight conversion factor and the second lookup table includes at least one weight conversion factor. The encoder side determines the target lookup table, see Embodiment 10 for a method for determining the target lookup table. As an example, the lookup target table is the first lookup table. The encoder side sequentially traverses each weighted prediction angle in the weighted prediction angle list, traverses each weighted prediction position in the weighted prediction position list, and sequentially traverses each weight conversion coefficient in the target lookup table. That is, a combination of each weighted prediction angle, each weighted prediction position, and each weight conversion factor is passed through. For each combination of weighted prediction angle(s), weighted prediction position(s), and weight transformation coefficient(s), the weighted prediction angle, weighted prediction position, and weight transformation coefficient in combination can be taken as the weighted prediction angle, weighted prediction position, and coefficient converting the weights of the current block obtained in step 401 and steps 402 to 408 are performed based on the weighted prediction angle, the weighted prediction position, and the weight conversion factor to obtain the weighted prediction value of the current block.

[280] Thus, the encoder side can obtain a group of weighted prediction values corresponding to the current block based on each combination (the combination includes a weighted prediction angle, a weighted prediction position, and a weight conversion factor). After receiving each group of weighted prediction values of the current block, the encoder side can determine the corresponding RDO cost value based on each group of weighted prediction values of the current block. The method for determining the value of RDO is not limited. The encoder side may obtain the RDO cost value for each combination and select the minimum RDO cost value from all the RDO cost values.

[281] Then, the encoder side takes the weighted prediction angle, weighted prediction position, and weight conversion factor corresponding to the minimum RDO cost value as the target weighted prediction angle, target weighted prediction position, and target weight conversion factor, respectively, and finally encodes the index value a weighted prediction target angle in the weighted prediction angle list, an index value of the weighted prediction target position in the weighted prediction position list, and an index value of the target weight conversion factor in the target lookup table into the bit stream of the current block.

[282] The decoder side builds a list of weighted prediction angles that is identical to the list of weighted prediction angles on the encoder side, the decoder side builds a list of weighted prediction positions that is identical to the list of weighted prediction positions on the encoder side, and the decoder side builds a lookup table that is identical to the lookup table on the encoder side. After receiving the encoded bitstream of the current block, the decoder side decodes the indication information from the encoded bitstream, selects a weighted prediction angle from the list of weighted prediction angles as the weighted prediction angle of the current block according to the indication information, and selects a weighted prediction position from the list of weighted prediction positions as weighted prediction positions of the current block according to the indication information. See Embodiment 9 for a method for obtaining a weighted prediction angle and a weighted prediction position, which is not described again here. After receiving the encoded bit stream of the current block, the decoder side may determine a target lookup table (for example, a first lookup table or a second lookup table) and select a weight conversion coefficient from the target lookup table as the weight conversion coefficient of the current block based on the weight conversion coefficient index information. see Embodiment 10 to obtain the weight conversion factor, which is not described again here.

[283] Embodiment 12 of the invention. In Embodiments 1 to 3 of the invention, the first pixel position prediction value is determined based on the first prediction mode, and the second pixel position prediction value is determined based on the second prediction mode.

[284] In this embodiment, description is given for the first prediction mode being an inter prediction mode and the second prediction mode being an inter prediction mode as an example.

[285] Condition 1: The first prediction mode is an inter-prediction mode, the second prediction mode is an inter-prediction mode, and a motion compensation candidate list is obtained, wherein the motion compensation candidate list includes at least two pieces of possible motion information. One piece of the possible motion information is selected from the motion compensation candidate list as the first motion target information of the current block, and another piece of the possible motion information is selected from the motion compensation candidate list as the second motion target information of the current block. For each pixel position of the current block, a first pixel position prediction value is determined based on the first motion target information, and a second pixel position prediction value is determined based on the second motion target information.

[286] For example, both the encoder side and the decoder side may obtain a motion compensation candidate list, and the encoder side motion compensation candidate list may be the same as the decoder side motion compensation candidate list, which is not limited here.

[287] For example, all pieces of possible motion information in a motion compensation candidate list are single-hypothesis motion information, e.g., possible motion information in a motion compensation candidate list is unidirectional motion information rather than bidirectional motion information. movement. Since all pieces of candidate motion information are single-hypothesis motion information, the motion compensation candidate list may be a unidirectional motion compensation candidate list.

[288] The process of obtaining a candidate list for motion compensation can be seen in subsequent embodiments of the invention and will not be repeated here.

[289] The encoder side may select, based on the RDO, one piece of possible motion information from the motion compensation candidate list as the first target motion information of the current block, and select another piece of possible motion information from the motion compensation candidate list as the second target motion information of the current block, wherein the first target motion information is different from the second target motion information, which is not limited here.

[290] In a possible implementation, when the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream may carry indication information a and indication information b. The indication information a indicates an index value 1 of the first target motion information of the current block, and an index value 1 represents which possible motion information in the candidate list for motion compensation is the first target motion information. The indication information b indicates the index value 2 of the second target motion information of the current block, and the index value 2 represents which possible motion information in the candidate list for motion compensation is the second target motion information. For example, index value 1 and index value 2 may be different.

[291] After receiving the encoded bitstream, the decoder side can analyze the indication information a and the indication information b from the encoded bitstream. Based on the indication information a, the decoder side selects the possible motion information corresponding to the index value 1 from the motion compensation candidate list as the first target motion information of the current block. Based on the indication information b, the decoder side selects the candidate motion information corresponding to the index value 2 from the motion compensation candidate list as the second target motion information of the current block.

[292] In another possible implementation, when the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream may carry indication information and indication information. The indication information a indicates the index value 1 of the first target motion information of the current block, and the index value 1 represents which possible motion information in the candidate list for motion compensation is the first target motion information. The indication information may be used to indicate the difference between index value 1 and index value 2, where index value 2 represents which possible motion information in the motion compensation candidate list is the second target motion information. For example, index value 1 and index value 2 may be different.

[293] After receiving the coded bit stream, the decoder side can analyze the indication information A and the indication information C from the coded bit stream. Based on the indication information a, the decoder side selects the possible motion information corresponding to the index value 1 from the motion compensation candidate list as the first target motion information of the current block. Based on the indication information, the decoder side obtains the difference between the index value 2 and the index value 1, and determines the index value 2 based on the difference and the index value 1, then the decoder side can select the possible motion information corresponding to the index value 2 from the candidate list for compensation movement, as the second target information about the movement of the current block.

[294] The process in which the encoder side/decoder side determines a first pixel position prediction value based on the first motion target information and determines a second pixel position prediction value based on the second motion target information may be referred to as an inter prediction process and will not be described here. repeat.

[295] For example, when the first pixel position prediction value is determined based on the first motion target information, the first pixel position prediction value may be obtained using an external weighted prediction mode. For example, an initial pixel position prediction value is determined based on the first motion target information, and then the initial prediction value is multiplied by a predetermined factor to obtain a correction prediction value. If the correction prediction value is greater than the maximum prediction value, the maximum prediction value is taken as the first prediction value of the current block; if the correction prediction value is smaller than the minimum prediction value, the minimum prediction value is taken as the first prediction value of the current block; and, if the prediction correction value is not less than the minimum prediction value or not greater than the maximum prediction value, the prediction correction value is taken as the first prediction value of the current block. The method described above is only illustrative and is not limited here.

[296] Similarly, when the second pixel position prediction value is determined based on the second motion target information, the second pixel position prediction value can be obtained using an external weighted prediction mode. The specific implementation can be referred to as the example above and will not be repeated here.

[297] Condition 2: The first prediction mode is an inter prediction mode, and the second prediction mode is an inter prediction mode. A first list of candidates for motion compensation and a second list of candidates for motion compensation are obtained, wherein the first list of candidates for motion compensation includes at least one piece of information about a possible motion, and the second list of candidates for motion compensation includes at least one piece of information about a possible movement. One piece of the possible motion information is selected from the first list of candidates for motion compensation as the first target motion information of the current block, and one piece of the possible motion information is selected from the second list of candidates for motion compensation as the second target motion information of the current block. For each pixel position of the current block, a first pixel position prediction value is determined based on the first motion target information; and a second pixel position prediction value is determined based on the second target motion information.

[298] For example, the encoder side and the decoder side may receive a first motion compensation candidate list and a second motion compensation candidate list, and the first motion compensation candidate list on the encoder side may be identical to the first motion compensation candidate list on the decoder side, and the second list of motion compensation candidates on the encoder side may be identical to the second list of motion compensation candidates on the decoder side.

[299] All pieces of possible motion information in the first motion compensation candidate list are single-hypothesis motion information, that is, the possible motion information in the first motion compensation candidate list is unidirectional motion information rather than bidirectional motion information. movement. Since all pieces of candidate motion information are single-hypothesis motion information, the first motion compensation candidate list may be a unidirectional motion compensation candidate list.

[300] All pieces of possible motion information in the second motion compensation candidate list are single-hypothesis motion information, that is, the possible motion information in the second motion compensation candidate list is unidirectional motion information rather than bidirectional motion information. movement. Since all pieces of candidate motion information are single-hypothesis motion information, the second motion compensation candidate list may be a unidirectional motion compensation candidate list.

[301] The process of obtaining the first motion compensation candidate list and the second motion compensation candidate list can be seen in subsequent embodiments of the invention.

[302] The encoder side may, based on the RDO, select one piece of possible motion information from the first candidate list for motion compensation as the first target motion information of the current block, and select one piece of possible motion information from the second candidate list for motion compensation in as the second target motion information of the current block, wherein the first target motion information is different from the second target motion information, which is not limited here.

[303] When the encoder side transmits the encoded bitstream to the decoder side, the encoded bitstream carries indication information a and indication information b. The indication information a indicates an index value 1 of the first target motion information of the current block, and an index value 1 represents which possible motion information in the first candidate list for motion compensation is the first target motion information. The indication information b indicates the index value 2 of the second target motion information of the current block, and the index value 2 represents which possible motion information in the second candidate list for motion compensation is the second target motion information. After receiving the coded bitstream, the decoder side analyzes the indication information a and the indication information b from the coded bitstream. Based on the indication information a, the decoder side selects the candidate motion information corresponding to the index value 1 from the first motion compensation candidate list as the first target motion information of the current block. Based on the indication information b, the decoder side selects the possible motion information corresponding to the index value 2 from the second motion compensation candidate list as the second target motion information of the current block.

[304] Under the conditions described above, the prediction information indicating information for the first prediction mode and the prediction information indicating information for the second prediction mode can be interchangeable provided that the encoder side and the decoder side are matched. The exchange of hint information does not affect the parsing process, that is, there is no dependency on parsing. In the case of using the same prediction mode candidate list, the prediction information indicating information for the first prediction mode cannot be equal to the prediction information indicating information for the second prediction mode. It is assumed that two indices are encoded, with the a index value being 1 and the b index value being 3, when the a index value is encoded first, the b index value can be encoded as 2 (ie 3-1); and when the index value b is encoded first, the index value b must be encoded as 3. In a word, the encoding indication information with a smaller index value first can reduce the encoding overhead for encoding a larger index value. According to the prediction mode candidate list construction method, the first prediction mode most likely comes from the left side, and based on this previous experience, adjustment can be made on the encoder side and the decoder side, and the prediction information indicating information in the area adjacent to the with the left side.

[305] The following description is combined with Condition 1, and other conditions are the same as Condition 1. In Condition 1, the prediction mode candidate list may be a motion compensation candidate list, the prediction information of the first prediction mode may be the first motion target information, and the prediction information of the second mode predictions may be the second target motion information. In the encoded bit stream, the first target motion information indication information such as index value a is encoded first, and then the second target motion information indication information such as index value b is encoded. Optionally, the second target motion information indicating information, such as the index value b, is first encoded, and then the first motion target information indicating information, such as the index value a, is encoded. For example, if the index value a is 1 and the index b value is 3, the index value a is encoded before the index value b. In another example, if the index value b is 1 and the index value a is 3, the index value b is encoded before the index value a.

[306] Embodiment 13 of the invention. In Embodiments 1 to 3 of the invention, the first pixel position prediction value is determined based on the first prediction mode, and the second pixel position prediction value is determined based on the second prediction mode. For example, the first prediction mode may be any of an intra-block copy prediction mode, an intra prediction mode, an inter prediction mode, and a palette mode; and the second prediction mode may be any of an intra-block copy prediction mode, an intra prediction mode, an inter prediction mode, and a palette mode.

[307] In this embodiment, description is given for the first prediction mode being an inter prediction mode and the second prediction mode being an inter prediction mode as an example. Since the first prediction mode is an inter-prediction mode, determining a first pixel position prediction value based on the first prediction mode of the current block may include: obtaining a motion compensation candidate list including at least one piece of possible motion information; selecting one piece of possible motion information from the list of candidates for motion compensation as the initial motion information of the current block; determining target motion information of the current block based on the original motion information; and determining a first pixel position prediction value based on the target motion information.

[308] Condition 1: The first prediction mode is an inter-prediction mode, the second prediction mode is an inter-prediction mode, and a motion compensation candidate list is obtained, wherein the motion compensation candidate list may include at least two pieces of possible motion information . One piece of the possible motion information is selected from the motion compensation candidate list as the first motion source information of the current block, and the other piece of the possible motion information is selected from the motion compensation candidate list as the second motion source information of the current block. The first motion source information is different from the second motion source information. Then, based on the first source motion information, first target motion information of the current block is determined, and based on the second source motion information, second target motion information of the current block is determined. For each pixel position of the current block, a first pixel position prediction value is determined based on the first motion target information, and a second pixel position prediction value is determined based on the second motion target information.

[309] The process of obtaining a candidate list for motion compensation can be seen in subsequent embodiments of the invention and will not be repeated here. The process of determining the first prediction value based on the first motion target information and determining the second prediction value based on the second motion target information can be seen in Embodiment 12 of the invention and will not be repeated here. Unlike Embodiment 12, in Embodiment 13, possible motion information selected from the candidate list for motion compensation is used as source motion information rather than as target motion information. After obtaining the source motion information, the target motion information can be obtained based on the source motion information, see the following embodiments for a specific acquisition process.

[310] Condition 2: The first prediction mode is an inter prediction mode, the second prediction mode is an inter prediction mode, a first motion compensation candidate list and a second motion compensation candidate list are obtained, wherein the first motion compensation candidate list includes at least at least one piece of possible motion information, and the second motion compensation candidate list includes at least one piece of possible motion information. One piece of possible motion information is selected from the first motion compensation candidate list as the first motion source information of the current block, and based on the first motion source information, the first target motion information of the current block is determined. One piece of possible motion information is selected from the second motion compensation candidate list as the second source motion information of the current block, and based on the second source motion information, the second target motion information of the current block is determined. For each pixel position of the current block, a first pixel position prediction value is determined based on the first motion target information; and a second pixel position prediction value is determined based on the second target motion information. Unlike Embodiment 12, in Embodiment 13, possible motion information selected from the candidate list for motion compensation is used as source motion information rather than as target motion information. After obtaining the source motion information, the target motion information can also be obtained based on the source motion information, see the following embodiments for a specific acquisition process.

[311] Thus, for the conditions described above, when the prediction mode is an inter prediction mode, a motion compensation candidate list can be obtained, wherein the motion compensation candidate list includes at least one piece of possible motion information. Then, the possible motion information is selected from the motion compensation candidate list as the input motion information of the current block. The first target motion information is determined based on the first source motion information, and the second target motion information is determined based on the second source motion information. Then, the pixel position prediction value is determined based on the target motion information.

[312] To determine target motion information based on source motion information, embodiments of the invention provide schemes for overlaying unidirectional motion information onto a motion vector difference (called Motion Vector Refinement). For example, the source motion information includes a source motion vector, and the target motion information includes a target motion vector. To determine the target motion vector of the current block based on the source motion vector, a motion vector difference (MVD) corresponding to the source motion vector can be obtained, and the target motion vector is determined based on the difference of the motion vectors and the source motion vector. That is, the sum of the difference between the motion vectors and the original motion vector is taken as the target motion vector.

[313] Embodiment 14 of the invention. Based on Embodiment 13 of the invention, the direction information and the amplitude information of the motion vector difference are matched. If 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 the direction information indicates the downward direction and the amplitude information indicates that the amplitude is equal to Ad, the difference of motion vectors is equal to (0, -Ad). If the direction information indicates the left direction and the amplitude information indicates that the amplitude is A1, the motion vector difference is (-A1, 0). If the direction information indicates the upward direction and the amplitude information indicates that the amplitude is Au, the motion vector difference is (0, Au). If the direction information indicates the right-up direction and the amplitude information indicates that the amplitude is Aru, the difference of motion vectors is (Aru, Aru). If the direction information indicates a left-up direction and the amplitude information indicates that the amplitude is Alu, the motion vector difference is (-Alu, Alu). If the direction information indicates the left-down direction and the amplitude information indicates that the amplitude is Ald, the motion vector difference is (-Ald, -Ald). If the direction information indicates the right-down direction and the amplitude information indicates that the amplitude is Ard, the motion vector difference is (Ard, -Ard).

[314] Note that the above amplitudes Ar, Ad, Al, Au, Aru, Alu, Ald and Ard respectively indicate one set of values, and the values in sets of amplitudes of different directions may be completely the same, or partially the same, or completely different.

[315] For example, the motion vector difference may support all or part of the above direction information, the range of values of the amplitude A supported by the motion vector difference may be configured based on experience, and the amplitude may include at least one value, which is not limited here.

[316] For example, motion vector difference supports four directions such as up, down, left and right, etc., and motion vector difference supports the following five step length configurations: ¼-pixel, ½-pixel, 1-pixel, 2-pixel and 4-pixel, that is, the amplitude value can be 1, 2, 4, 8 and 16. Thus, in the upward direction, the difference in motion vectors can be (0, 1), (O, 2), (0, 4), (0, 8) and (0, 16). In the downward direction, the difference in motion vectors can be (0, -1), (0, -2), (0, -4), (0, -8) and (0, -16). When directed to the left, the difference in motion vectors can be (-1.0), (-2, 0), (-4, 0), (-8, 0) and (-16, 0). When directed to the right, the difference in motion vectors can be (1, 0), (2, 0), (4, 0), (8, 0) and (16, 0).

[317] In another example, the motion vector difference supports four directions such as up, down, left and right, etc., and the motion vector difference supports the following six step length configurations: ¼-pixel, ½-pixel, 1-pixel , 2-pixel, 3-pixel and 4-pixel, that is, the amplitude value can be 1, 2, 4, 8 and 16. Thus, in the upward direction, the difference in motion vectors can be (0, 1), (0, 2), (0, 4), (0, 8), (0, 12) and (0, 16). Differences in motion vectors in other directions can be realized in the same way as in the “up” direction, and are not repeated here.

[318] In another example, the motion vector difference supports eight directions such as up, down, left, right, left-up, left-down, right-up and right-down, etc., and the motion vector difference supports the following three step length configurations: ¼-pixel, ½-pixel and 1-pixel, that is, the value of amplitude A can be equal to 1, 2 and 4. Thus, in the left-up direction, the difference in motion vectors can be (-1, 1) , (-2, 2) and (-4, 4). When the direction is right-up, the difference of motion vectors can be (1, 1), (2, 2) and (4, 4). The motion vector differences of other directions can be implemented in the same way as in the left-up and right-up directions, and the meanings of the motion vector differences can be specified in the above-described convention and will not be repeated here.

[319] In another example, the motion vector difference supports four directions such as up, down, left and right, etc., and the motion vector difference supports the following four step length configurations: ¼-pixel, ½-pixel, 1-pixel and 2-pixel, that is, the amplitude value can be 1, 2, 4 and 8.

[320] The above examples are illustrative only and no limitation is intended herein. For example, the direction supported by the motion vector difference can be selected arbitrarily, for example, 6 directions such as up, down, left, right, left-up and left-down etc. can be selected, or two directions, for example up and down, etc. As another example, the step length configuration supported by the motion vector difference may be changeable and flexibly configured. In another example, the step length configuration may be adaptively configured based on encoding parameters such as QP (quantization parameter) and the like. For example, 1-pixel, 2-pixel, 4-pixel and 8-pixel can be adopted for a larger QP, and ¼-pixel, ½-pixel, 1-pixel and 2-pixel can be adopted for a smaller QP. In another example, a suitable step length configuration may be configured at the sequence level, picture level, frame level, slice level, tile level, patch level, CTU level, etc., and the decoder side performs a decoding operation in accordance with the step length configurations. analyzed at sequence level, image level, frame level, slice level, tile level, patch level, CTU level, etc.

[321] For ease of description, in subsequent embodiments of the invention, the motion vector difference supports directions such as up and down and the like, and supports step length configurations such as 1-pixel and 2-pixel in the case of ¼-pixel precision the difference of motion vectors can be (0, 4), (0, 8), (0, -4), (0, -8), that is (0, 1 << 2), (0, 1 << 3) , (0, -1 << 2) and (0, -1 << 3).

[322] After receiving the motion compensation candidate list, the encoder side may sequentially go through each possible motion vector in the motion compensation candidate list. When passing the possible motion vector 1, the sum of the possible motion vector 1 and the difference of the motion vectors (0, 4) is taken as the possible motion vector 1-1, and the RDO cost value 1-1 corresponding to the possible motion vector 1-1 is determined. The determination process described above is not limited here. The sum of the possible motion vector 1 and the difference of the motion vectors (0, 8) is taken as the possible motion vector 1-2, and the RDO cost value 1-2 corresponding to the possible motion vector 1-2 is determined. The sum of the possible motion vector 1 and the difference of the motion vectors (0, -4) is taken as the possible motion vector 1-3, and the RDO cost value 1-3 corresponding to the possible motion vector 1-3 is determined. The sum of the possible motion vector 1 and the difference of the motion vectors (0, -8) is taken as the possible motion vector 1-4, and the RDO cost value 1-4 corresponding to the possible motion vector 1-4 is determined.

[323] Likewise, for each of the possible motion vectors traversed, the RDO cost value can be obtained by the processing described above. After completing the passage of all possible motion vectors, the minimum RDO cost value is selected from all RDO cost values. If the RDO cost value 1-1 is the minimum, the encoder side can encode the following contents in the encoded bitstream: the index value of candidate motion vector 1 in the motion compensation candidate list, direction information, and motion vector difference amplitude information (0, 4), wherein the direction information is used to indicate the upward direction of the motion vector difference (0, 4), and the amplitude information is used to indicate the amplitude of the motion vector difference (0, 4) and is equal to 4. For example, the direction information indication information may be 0 , which indicates the first direction in the direction list (up and down), and the amplitude information indicating information may be 4, which indicates the first step length configuration in the step length configuration list (1-pixel, 2-pixel). The process described above is a simplified example, which is not limited here as long as direction information and amplitude information can be specified.

[324] For example, when the motion vector difference supports four directions such as up, down, left and right, etc., and the motion vector difference supports five step length configurations such as ¼-pixel, ½-pixel, 1- pixel, 2-pixel and 4-pixel, etc., the motion vector difference direction information can be encoded using a 2-bin fixed-length code (a total of four values), wherein the four values of the 2-bin fixed-length code respectively represent four directions such as up, down, left and right, etc. The motion vector difference amplitude information may be encoded using a truncated unary code, that is, five step length configurations are indicated by a truncated unary code.

[325] Another example is where the motion vector difference supports four directions, such as up, down, left and right, etc., and the motion vector difference supports six step length configurations, such as ¼-pixel, ½-pixel, 1 -pixel, 2-pixel, 3-pixel and 4-pixel etc., information about the direction of the motion vector difference can be encoded using a 2-bin fixed-length code (four values in total), and information about the amplitude of the motion vector difference can be encoded using truncated unary code.

[326] Another example is when the motion vector difference supports eight directions such as up, down, left, right, left-up, left-down, right-up and right-down, etc., and the motion vector difference supports three step length configurations such as ¼-pixel, ½-pixel and 1-pixel, etc., motion vector difference direction information can be encoded using a 3-bin fixed-length code (eight values in total), and amplitude information motion vector differences may be encoded using a truncated unary code.

[327] In another example, when the motion vector difference supports four directions such as up, down, left, right, etc., and the motion vector difference supports four step length configurations such as ¼-pixel, ½-pixel, 1-pixel and 2-pixel, etc., thus the motion vector difference direction information can be encoded using a truncated unary code, and the motion vector difference amplitude information can be encoded using a 2-bin fixed-length code (four values in total) ).

[328] The encoding methods described above are examples only and are not limited here.

[329] To summarize, the encoder side can search for the optimal motion vector in a certain area, and then take the difference between the optimal motion vector and the possible motion vector as the motion vector difference, and encode the amplitude information and the direction information of the motion vector difference and an index value of a candidate motion vector in the list of candidates for motion compensation into the bitstream. When the encoder side searches for the optimal motion vector in a certain area, it is expected that the direction and amplitude of the motion vector difference will be consistent, that is, the search for the optimal motion vector is carried out in limited ranges of the motion vector difference, for example (Ar, 0), (0, - Ad), (-A1, 0), (0, Au), (Aru, Aru), (-Aru, Alu), (-Ald, -Ald) and (Ard, -Ard), etc., and not in any range of motion vector differences.

[330] After receiving the encoded bitstream of the current block, the decoder side may analyze the index value of a candidate motion vector in the motion compensation candidate list from the encoded bitstream and select a candidate motion vector corresponding to the index value in the candidate list for motion compensation and receive the candidate motion vector in as the initial motion vector of the current block. The decoder side can also analyze the direction information and the motion vector difference amplitude information from the encoded bit stream, and determine the motion vector difference based on the direction information and the amplitude information.

[331] Then, the decoder side can determine the target motion vector of the current block based on the difference of the motion vectors and the source motion vector, for example, the sum of the difference of the motion vectors and the source motion vector can be taken as the target motion vector of the current block.

[332] In the above-described embodiments of the invention, when determining the motion vector difference based on the direction information and the amplitude information, if 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 the direction information indicates the downward direction and the amplitude information indicates that the amplitude is equal to Ad, the difference of motion vectors is equal to (0, -Ad). If the direction information indicates the left direction and the amplitude information indicates that the amplitude is A1, the motion vector difference is (-A1, 0). If the direction information indicates the upward direction and the amplitude information indicates that the amplitude is Au, the motion vector difference is (0, Au). If the direction information indicates the right-up direction and the amplitude information indicates that the amplitude is Aru, the difference of motion vectors is (Aru, Aru). If the direction information indicates a left-up direction and the amplitude information indicates that the amplitude is Alu, the motion vector difference is (-Alu, Alu). If the direction information indicates the left-down direction and the amplitude information indicates that the amplitude is Ald, the motion vector difference is (-Ald, -Ald). If the direction information indicates the right-down direction and the amplitude information indicates that the amplitude is Ard, the motion vector difference is (Ard, -Ard).

[333] In the above embodiment, when encoding the motion vector difference direction information, the encoder side may use a fixed length code or a truncated unary code or the like. Therefore, a fixed-length code or a truncated unary code, etc. may be used on the decoder side. for decoding information about the direction of the motion vector difference to obtain information about the direction of the motion vector difference, such as up, down, left, right, left-up, left-down, right-up, right-down, etc.

[334] In the above embodiment, when encoding the motion vector difference amplitude information, the encoder side may use a fixed length code or a truncated unary code or the like. Therefore, the decoder side may use a fixed-length code or a truncated unary code, etc. for decoding motion vector difference amplitude information to obtain motion vector difference amplitude information such as step length configurations: ¼-pixel, ½-pixel, 1-pixel, 2-pixel, etc., and then determine the amplitude value motion vector differences based on step length configurations, such as ¼-pixel, ½-pixel, 1-pixel, and 2-pixel.

[335] To summarize, the decoder side can analyze the direction information and the motion vector difference amplitude information from the encoded bit stream, and then determine the motion vector difference based on the direction information and the amplitude information.

[336] In an exemplary implementation, the encoder side may also encode flag information in the encoded bit stream, wherein the flag information indicates whether the motion vector difference is superimposed on the original motion vector or whether the motion vector difference is not superimposed on the original motion vector. The flag information may be a submode flag of the extended angle weighted prediction mode. In addition, the advanced angle weighted prediction mode may also be referred to as AWP with Motion Vector Refinement (AWP-MVR). After receiving the encoded bitstream of the current block, the decoder side first parses the flag information from the encoded bitstream of the current block. If the flag information indicates an overlap of the motion vector difference with the original motion vector, the decoder side analyzes the direction information and the amplitude information of the motion vector difference from the encoded bitstream of the current block, and determines the motion vector difference based on the direction information and the amplitude information, and determines the target the motion vector of the current block based on the original motion vector and the difference of the motion vectors. If the flag information indicates that there is no overlap of the motion vector difference with the source motion vector, the decoder side does not analyze the direction information or the amplitude information of the motion vector difference, but directly takes the source motion vector as the target motion vector of the current block.

[337] For example, when the weighted prediction extended angle mode submode flag is the first value of the submode, it indicates superposition of the motion vector difference on the original motion vector; when the EAWP mode submode flag is the second submode value, it indicates that the motion vector difference is not superimposed on the original motion vector. The first submode value and the second submode value may be configured based on experience, for example, the first submode value may be 1 and the second submode value may be 0, or, for example, the first submode value may be 0 and the second submode value may be 1. The above are just two examples and no limitations are made here.

[338] In a possible implementation for conditions 1 or 2 of embodiment 13 of the invention, the first source motion information includes a first source motion vector, the first target motion information includes a first target motion vector, the second source motion information includes a second source motion vector, and the second the target motion information includes a second target motion vector. Based on the above, the first motion vector difference corresponding to the first source motion vector can be obtained, and the first target motion vector is determined based on the first motion vector difference and the first source motion vector, that is, the sum of the first motion vector difference and the first source motion vector is taken as the first target motion vector. A second motion vector difference corresponding to the second source motion vector can be obtained, and a second target motion vector is determined based on the second motion vector difference and the second source motion vector, that is, the sum of the second motion vector difference and the second source motion vector is taken as the second target vector. movements.

[339] The encoder side may use RDO to determine a first motion vector difference corresponding to the first source motion vector and determine a second motion vector difference corresponding to the second source motion vector, which is not limited here.

[340] When the encoder side transmits the encoded bitstream of the current block to the decoder side, the encoded bitstream may carry direction information and amplitude information of the first motion vector difference, as well as direction information and amplitude information of the second motion vector difference.

[341] The decoder side, after receiving the encoded bitstream of the current block, can analyze the direction information and the amplitude information of the first motion vector difference from the encoded bitstream, and determine the first motion vector difference based on the direction information and the amplitude information of the first motion vector difference, and can analyze the direction information and the amplitude information of the second motion vector difference from the encoded bit stream, and determine the second motion vector difference based on the direction information and the amplitude information of the second motion vector difference. Then, the decoder side may determine a first target motion vector of the current block based on the first difference of the motion vectors and the first source motion vector, and determine a second target motion vector of the current block based on the second difference of the motion vectors and the second source motion vector.

[342] In an exemplary implementation, the encoder side may also encode a first submode flag and a second extended angle weighted prediction mode submode flag in the encoded bitstream, wherein the first submode flag indicates whether the motion vector difference is superimposed on the first original motion vector or whether the motion vector difference is not superimposed. on the first original motion vector, and the second sub-mode flag indicates that the motion vector difference is superimposed on the second original motion vector or that the motion vector difference is not superimposed on the second original motion vector.

[343] In an exemplary implementation, the above-mentioned first submode flag may also be the first flag bit in the encoded bitstream, and the above-mentioned second submode flag may also be the second flag bit in the encoded bitstream.

[344] The decoder side, after receiving the coded bitstream of the current block, may first analyze the first submode flag and the second extended angle weighted prediction mode submode flag from the coded bitstream of the current block. If the first sub-mode flag indicates superposition of a motion vector difference on the first original motion vector, the decoder side analyzes the direction information and the amplitude information of the first motion vector difference from the encoded bit stream, and determines the first motion vector difference based on the direction information and the amplitude information of the first a motion vector difference, and then determines a first target motion vector of the current block based on the first source motion vector and the first motion vector difference. If the first submode flag indicates that the motion vector difference is not superimposed on the first source motion vector, the decoder side does not analyze the direction information or the amplitude information of the first motion vector difference, but directly takes the first source motion vector as the first target motion vector of the current block. If the second sub-mode flag indicates superposition of the motion vector difference on the second original motion vector, the decoder side analyzes the direction information and the amplitude information of the second motion vector difference from the encoded bit stream, and determines the second motion vector difference based on the direction information and the amplitude information of the second a motion vector difference, and then determines a second target motion vector of the current block based on the second source motion vector and the second motion vector difference. If the second sub-mode flag indicates that there is no overlap of the motion vector difference with the second source motion vector, the decoder side does not analyze the direction information or the amplitude information of the second motion vector difference, but directly takes the second source motion vector as the second target motion vector of the current block.

[345] Embodiment 15 of the invention. Based on embodiments 13 and 14 of the invention for the condition of two motion vector differences, the corresponding syntax for superimposing the motion vector difference on unidirectional motion information is described below in combination with several specific application scenarios.

[346] Application Scenario 1: Table 4 shows an example of the corresponding syntax, where SkipFlag indicates whether the current block is in skip mode, DirectFlag indicates whether the current block is in direct mode, and AwpFlag indicates whether the current block is in AWP mode.

[347] awp_idx (weighted prediction angular mode index) is the weighted prediction angular mode index value in skip mode or forward mode, and the value of AwpIdx may be equal to the value of awp_idx. If there is no awp_idx in the bitstream, the value of AwpIdx is 0.

[348] awp_cand_idx0 (first weighted prediction angular mode motion information index) is the first value of the weighted prediction angular mode motion information index in the skip mode or direct mode. The value of AwpCandIdx0 is equal to the value of awp_cand_idx0. If there is no awp_cand_idx0 in the bitstream, the value of AwpCandIdx0 is 0.

[349] awp_cand_idx1 (second motion information index for angular weighted prediction mode) is the second motion information index value for angular weighted prediction mode in skip mode or forward mode. The value of AwpCandIdx1 is equal to the value of awp_cand_idx1. If there is no awp_cand_idx1 in the bitstream, the value of AwpCandIdx1 is 0.

[350] awp_mvd_flag (extended angle weighted prediction mode flag) is a binary variable. When awp_mvd_flag is the first value (eg, 1), it indicates that the current block is in extended angle weighted prediction mode; when awp_mvd_flag is the second value (eg 0), it indicates that the current block is in non-extended angle weighted prediction mode. For example, the value of AwpMvdFlag can be equal to the value of awp_mvd_flag. If there is no awp_mvd_flag in the bitstream, the value of AwpMvdFlag is 0.

[351] awp_mvd_sub_flag0 (first flag of the extended angle weighted prediction mode submode) is a binary variable. When awp_mvd_sub_flag0 is the first value, it indicates that the first weighted prediction angular mode motion information should be superimposed on the motion information difference; when awp_mvd_sub_flag0 is the second value, it indicates that the first weighted prediction angular mode motion information should not overlap with the motion information difference. For example, the value of AwpMvdSubFlag0 may be equal to the value of awp_mvd_sub_flag0. If there is no awp_mvd_sub_flag0 in the bitstream, the value of AwpMvdSubFlag0 is 0.

[352] awp_mvd_sub_flag1 (second advanced angle weighted prediction mode submode flag) is a binary variable. When awp_mvd_sub_flag1 is the first value, it indicates that the second motion information of the weighted prediction angular mode should be superimposed on the motion information difference; when awp_mvd_sub_flag1 is the second value, it indicates that the second motion information of the weighted prediction angular mode should not overlap the motion information difference. For example, the value of AwpMvdSubFlag1 may be equal to the value of awp_mvd_sub_flag1. If there is no awp_mvd_sub_flag1 in the bitstream, the following case may be: if the value of AwpMvdFlag is 1, the value of AwpMvdSubFlag1 is 1, otherwise the value of AwpMvdSubFlag1 may be 0.

[353] awp_mvd_dir0 (motion vector difference direction index value for first motion information) is a motion vector difference direction index value for first motion information in the angular weighted prediction mode. For example, the value of AwpMvdDir0 may be equal to the value of awp_mvd_dir0. If there is no awp_mvd_dir0 in the bitstream, the value of AwpMvdDir may be 0.

[354] awp_mvd_step0 (motion vector difference step length index value of the first motion information) is a motion vector difference step length index value of the first motion information in the angular weighted prediction mode. For example, the value of AwpMvdStep0 may be equal to the value of awp_mvd_step0. If there is no awp_mvd_step0 in the bitstream, the value of AwpMvdStep0 may be 0.

[355] awp_mvd_dir1 (second motion information motion vector difference direction index value) is a motion vector difference direction index value of the second motion information in the angular weighted prediction mode. For example, the value of AwpMvdDirl could be equal to the value of awp_mvd_dir1. If there is no awp_mvd_dir1 in the bitstream, the value of AwpMvdDirl may be 0.

[356] awp_mvd_step1 (motion vector difference step length index value of the second motion information) is a motion vector difference step length index value of the second motion information in the angular weighted prediction mode. For example, the value of AwpMvdStep1 may be equal to the value of awp_mvd_step1. If there is no awp_mvd_step1 in the bitstream, the value of AwpMvdStep1 may be 0.

[357] Application Scenario 2: Table 5 shows an example of the corresponding syntax, where SkipFlag indicates whether the current block is in skip mode, DirectFlag indicates whether the current block is in direct mode, and AwpFlag indicates whether the current block is in AWP mode.

[358] For awp_idx, awp_cand_idx0 and awp_cand_idx1, reference may be made to Application Scenario 1 and no redundant descriptions are given here.

[359] awp_mvd_sub_flag0 (first flag of the extended angle weighted prediction mode submode) is a binary variable. When awp_mvd_sub_flag0 is the first value, it indicates that the first weighted prediction angular mode motion information should be superimposed on the motion information difference; when awp_mvd_sub_flag0 is the second value, it indicates that the first weighted prediction angular mode motion information should not overlap the motion information difference. For example, the value of AwpMvdSubFlag0 may be equal to the value of awp_mvd_sub_flag0. If there is no awp_mvd_sub_flag0 in the bitstream, the value of AwpMvdSubFlag0 is 0.

[360] awp_mvd_sub_flag1 (second advanced angle weighted prediction mode submode flag) is a binary variable. When awp_mvd_sub_flag1 is the first value, it indicates that the second motion information of the weighted prediction angular mode should be superimposed on the motion information difference; when awp_mvd_sub_flag1 is the second value, it indicates that the second motion information of the weighted prediction angular mode should not overlap the motion information difference. For example, the value of AwpMvdSubFlag1 may be equal to the value of awp_mvd_sub_flag1. If there is no awp_mvd_sub_flag1 in the bitstream, the value of AwpMvdSubFlag1 may be 0.

[361] Awp_mvd_dir0, awp_mvd_step0, awp_mvd_dir1 and awp_mvd_step1 can be referenced to Application Scenario 1.

[362] For example, Application Scenario 1 and Application Scenario 2 differ in the following ways: Application Scenario 1 has the awp_mvd_flag syntax, but Application Scenario 2 does not have the awp_mvd_flag syntax. In application scenario 1, the extended angle weighted prediction mode is controlled by awp_mvd_flag, that is, the extended angle weighted prediction mode is controlled by the main switch.

[363] Application Scenario 3: The above Application Scenario 1 and Application Scenario 2 can be extended to fully integrate AWP and AWP-MVR modes, that is, add 0 ranges to the range, thus there is no need to encode a flag bit to indicate whether enable or not. For example, motion vector difference supports four directions such as up, down, left and right, etc., and motion vector difference supports the following 6 step length configurations: 0-pixel, 1/4-pixel, 1/2-pixel , 1-pixel, 2-pixel and 4-pixel, that is, a 0-pixel pitch configuration is added. Based on this, Table 4 or Table 5 can be updated to Table 6. The meanings of the corresponding syntax in Table 6 can be found in Table 4 and will not be repeated here.

[364] For example, in the above embodiments, target motion information can be obtained based on source motion information. After the target motion information is acquired, the target motion information of the current block may be stored in a manner that is not limited here.

[365] Embodiment 16: In Embodiments 12 and 13, a motion compensation candidate list is expected to be obtained, and in the process of obtaining the motion compensation candidate list, at least one piece of available motion information to be added to list of candidates for motion compensation; based on said at least one piece of available motion information, a list of candidates for motion compensation is obtained. For example, for available motion information that currently needs to be added to the motion compensation candidate list, if the available motion information is unidirectional motion information and the unidirectional motion information is not duplicated by possible motion information already existing in the candidate list for motion compensation, unidirectional motion information is added to the candidate list for motion compensation. If the available motion information is bidirectional motion information, and the first unidirectional motion information in the bidirectional motion information is not duplicated by the possible motion information already existing in the motion compensation candidate list, the first unidirectional motion information is added to the compensation candidate list. movements. If the available traffic information is bidirectional traffic information, the first unidirectional traffic information in the bidirectional traffic information is duplicated by the possible traffic information already existing in the motion compensation candidate list, and the second unidirectional traffic information in the bidirectional traffic information is not duplicated by the information about a possible motion already existing in the motion compensation candidate list, then the second unidirectional motion information is added to the motion compensation candidate list.

[366] For example, the first unidirectional motion information is unidirectional motion information indicating a reference picture in the first reference picture list, and the second unidirectional motion information is unidirectional motion information indicating a reference picture in the second reference picture list.

[367] In an exemplary implementation, if the total amount of possible motion information already existing in the motion compensation candidate list (eg, the total amount of possible motion information already existing for the current block) is an even number, then the first reference picture list represents is a reference picture list List0, and the second reference picture list is a reference picture list List1; if the total amount of possible motion information already existing in the motion compensation candidate list is an odd number, the first reference picture list is reference picture list ListO and the second reference picture list is reference picture list List1. Alternatively, if the total amount of possible motion information already existing in the motion compensation candidate list is an odd number, the first reference picture list is a reference picture list ListO and the second reference picture list is a reference picture list List1; if the total amount of possible motion information already existing in the motion compensation candidate list is an even number, the first reference picture list is reference picture list ListO and the second reference picture list is reference picture list List1.

[368] In another possible implementation, the first reference picture list is a reference picture list List0, and the second reference picture list is a reference picture list List1; or the first reference picture list is a reference picture list List1, and the second reference picture list is a reference picture list ListO.

[369] In the above embodiments, at least one piece of available motion information to be added to the candidate list for motion compensation may include, but is not limited to, at least one of the following motion information: spatial motion information movement; temporary traffic information; HMVP motion information (history-based motion vector prediction); or preset motion information.

[370] For example, the motion compensation candidate list mentioned above may be a unidirectional motion compensation candidate list as shown in FIG. 9, which is a schematic diagram of the current block and neighboring blocks. For the process of obtaining a motion compensation candidate list based on the order of F, G, C, A, B, D, spatial unidirectional motion information is added to the motion compensation candidate list and a duplication check is performed, and temporal unidirectional motion information is added to the candidate list. to compensate for motion and perform a duplication check, and finally, if the candidate list for motion compensation is not complete, perform the padding operation again. The order F, G, C, A, B, D is just an example, and other orders may be used and are not limited.

[371] Performing a duplication test consists of comparing the motion information to be added to the motion compensation candidate list with each of the existing possible motion information in the motion compensation candidate list, unless it is duplicated against all existing information. about a possible movement in the list of candidates to compensate for the movement, it is considered that the list of candidates is without duplication; if it is duplicated in comparison to any existing motion candidate information in the motion compensation candidate list, it is considered duplicated.

[372] The process of obtaining a candidate list for motion compensation is described below through several specific application scenarios.

[373] Application Scenario 1: Spatial motion information and temporal motion information are jointly added to a candidate list for motion compensation.

[374] In the first step, as shown in FIG. 9, F, G, C, A, B, and D are neighboring prediction blocks of the current block E, and determine the availability of F, G, C, A, B, and D. For example, if F is present and the inter prediction mode is adopted, the information F about motion can be defined as available motion information; otherwise, it is determined that the motion information F is not available. If G is present and the inter-prediction mode is adopted, the motion information G can be determined to be the available motion information; otherwise, it is determined that the motion information G is not available. If C is present and the inter-prediction mode is adopted, the motion information C can be determined to be the available motion information; otherwise, it is determined that motion information C is not available. If A is present and the inter-prediction mode is adopted, the motion information A can be determined to be the available motion information; otherwise, it is determined that the motion information A is not available. If B is present and the inter-prediction mode is adopted, motion information B can be determined to be available motion information; otherwise, it is determined that motion information B is not available. If D is present and the inter-prediction mode is adopted, motion information D can be determined to be available motion information; otherwise, it is determined that motion information D is not available.

[375] In the second step, the available motion information is added to the motion compensation candidate list AwpUniArray based on the order of the available motion information F, G, C, A, B, and D (this order is variable and includes only the available motion information) and order of temporary motion information (including available motion information) until the length of AwpUniArray equals X or until the traversal completes.

[376] Condition 1, for adding available motion information to the motion compensation candidate list if the available motion information is bidirectional motion information (for example, including unidirectional motion information pointing to reference picture list List0 and unidirectional motion information , pointing to the reference picture list List1), based on the parity of the total amount of existing possible motion information in the motion compensation candidate list (i.e., the current length of the motion compensation candidate list AwpUniArray), determine how to add the available motion information to the candidate list AwpUniArray for motion compensation motion compensation. For simplicity, the available motion information may be referred to as the first available motion information.

[377] Method 1. If the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an even number, perform a duplication check between the unidirectional motion information pointing to the reference picture list List0 in the first available motion information and the information about unidirectional motion in the AwpUniArray list of candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the first available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray.

[378] Alternatively, if the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an odd number, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the first available motion information and the unidirectional motion in the AwpUniArray list of candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the first available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference images is added to the AwpUniArray candidate list for motion compensation.

[379] Method 2 If the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an odd number, perform a duplication check between the unidirectional motion information pointing to the reference picture list List0 in the first available motion information and the unidirectional information about motion in the AwpUniArray list of candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the first available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray.

[380] Alternatively, if the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an even number, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the first available motion information and the unidirectional motion in the AwpUniArray list of candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the first available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray.

[381] Condition 2: To add available motion information to the motion compensation candidate list, if the available motion information is unidirectional motion information, perform a duplication check between the unidirectional motion information and the unidirectional motion information in the compensation candidate list AwpUniArray movements. If there is no duplication, unidirectional motion information is added to the AwpUniArray list of candidates for motion compensation.

[382] In the third step, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the length of the list becomes X.

[383] For example, in application scenario 1, the temporary motion information may be unidirectional motion information or bidirectional motion information. For example, in a P-slice, the temporal motion information is unidirectional motion information, and in a B-slice, the temporal motion information is bidirectional motion information.

[384] Application scenario 2: After adding spatial motion information to the motion compensation candidate list, the Y positions are reserved for temporal motion information, and the temporal motion information is bidirectional motion information, that is, the motion compensation candidate list includes temporal information about the movement of Y.

[385] The first step is to determine the "availability" of motion information F, G, C, A, B and D, which may relate to Application Scenario 1.

[386] In the second step, the available motion information (each available spatial motion information) is added to the AwpUniArray candidate list for motion compensation based on the order of the available motion information F, G, C, A, B, and D (this order is variable and includes only available motion information) until the length of the AwpUniArray candidate list for motion compensation is X-Y, or until the available motion information has been traversed.

[387] The second stage of Application Scenario 2 can be seen in the second stage of Application Scenario 1 and will not be repeated here.

[388] Third step, for temporary motion information that currently needs to be added to the candidate list for motion compensation (for example, temporary bidirectional motion information and available motion information), the temporary motion information is added to the AwpUniArray candidate list for motion compensation according to the parity of the total amount of possible motion information already existing in the motion compensation candidate list (ie, the current length of the motion compensation candidate list).

[389] Method 1. If the total number of existing possible motion information in the motion compensation candidate list AwpUniArray is an even number, perform a duplication check between the unidirectional motion information pointing to the reference picture list List0 in the temporary motion information and the unidirectional motion in the AwpUniArray list of candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray.

[390] Alternatively, if the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an odd number, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the temporary motion information and the unidirectional motion information motion in the list of AwpUniArray candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray.

[391] Method 2 If the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an odd number, perform a duplication check between the unidirectional motion information pointing to the reference picture list List0 in the temporary motion information and the unidirectional motion in the AwpUniArray list of candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray.

[392] Alternatively, if the total amount of existing possible motion information in the motion compensation candidate list AwpUniArray is an even number, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the temporary motion information and the unidirectional motion information motion in the list of AwpUniArray candidates for motion compensation. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray.

[393] In the fourth step, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the length of the list becomes X.

[394] Application scenario 3: After adding spatial motion information to the motion compensation candidate list, the Y positions are reserved for temporal motion information, and the temporal motion information is unidirectional motion information, that is, the motion compensation candidate list includes temporal information about the movement of Y.

[395] The first step is to determine the "availability" of motion information F, G, C, A, B and D, which may relate to Application Scenario 1.

[396] In the second step, the available motion information (each available spatial motion information) is added to the AwpUniArray candidate list for motion compensation based on the order of the available motion information F, G, C, A, B, and D (this order is variable and includes only available motion information) until the length of the AwpUniArray candidate list for motion compensation is X-Y, or until the available motion information has been traversed.

[397] The second stage of Application Scenario 3 can be seen in the second stage of Application Scenario 1 and will not be repeated here.

[398] In the third step, for the temporary motion information that currently needs to be added to the candidate list for motion compensation (for example, the temporary unidirectional motion information and the available motion information), a duplication check is performed between the temporal motion information and information about unidirectional motion in the list of AwpUniArray candidates for motion compensation. If there is no duplication, temporary motion information is added to the AwpUniArray list of candidates for motion compensation.

[399] In the fourth step, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the length of the list becomes X.

[400] Application Scenario 4: Spatial motion information and temporal motion information are jointly added to a candidate list for motion compensation.

[401] The first step is to determine the "availability" of motion information F, G, C, A, B and D, which may relate to Application Scenario 1.

[402] In the second step, the available motion information is added to the motion compensation candidate list AwpUniArray based on the order of the available motion information F, G, C, A, B, and D (this order is variable and includes only the available motion information) and order of temporary motion information (including available motion information) until the length of AwpUniArray becomes X or until the traversal completes:

[403] Condition 1, for available motion information that is currently to be added to the candidate list for motion compensation, if the available motion information is bidirectional motion information (for example, including unidirectional motion information pointing to List0 references images, and unidirectional motion information pointing to reference image list List1), the available motion information is added to the motion compensation candidate list AwpUniArray. For simplicity, the available motion information may be referred to as the second available motion information.

[404] In Method 1, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the second available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the second available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray.

[405] Method 2, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the second available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the second available motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray.

[406] Condition 2: To add available motion information to the motion compensation candidate list, if the available motion information is unidirectional motion information, perform a duplication check between the unidirectional motion information and the unidirectional motion information in the compensation candidate list AwpUniArray movements. If there is no duplication, unidirectional motion information is added to the AwpUniArray list of candidates for motion compensation.

[407] In the third step, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the length of the list becomes X.

[408] For example, in application scenario 4, the temporary motion information may be unidirectional motion information or bidirectional motion information. For example, in a P-slice, the temporal motion information is unidirectional motion information, and in a B-slice, the temporal motion information is bidirectional motion information.

[409] Application scenario 5: After adding spatial motion information to the motion compensation candidate list, the Y positions are reserved for temporal motion information, and the temporal motion information is bidirectional motion information, that is, the motion compensation candidate list includes temporal information about the movement of Y.

[410] The first step is to determine the "availability" of motion information F, G, C, A, B and D, which may relate to Application Scenario 1.

[411] In the second step, the available motion information (eg, each available spatial motion information) is added to the AwpUniArray candidate list for motion compensation based on the order of the available motion information F, G, C, A, B, and D (this order is variables and includes only available motion information) until the length of the AwpUniArray candidate list for motion compensation is equal to X-Y, or until the available motion information has been traversed.

[412] The second stage of Application Scenario 5 can be seen in the second stage of Application Scenario 1 and will not be repeated here.

[413] In the third step, for temporary motion information that currently needs to be added to the candidate list for motion compensation (for example, temporary bidirectional motion information and available motion information), the temporary motion information is added to the candidate list AwpUniArray for motion compensation.

[414] Method 1, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray.

[415] Method 2, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List1 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to reference picture list List1 is added to the motion compensation candidate list AwpUniArray. In the case of duplication, a duplication check is performed between the unidirectional motion information pointing to the reference picture list List0 in the temporary motion information and the unidirectional motion information in the motion compensation candidate list AwpUniArray. In the absence of duplication, unidirectional motion information pointing to List0 of reference pictures is added to the motion compensation candidate list AwpUniArray.

[416] In the fourth step, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the length of the list becomes X.

[417] After adding spatial motion information to the motion compensation candidate list, the Y positions are reserved for temporal motion information, and the temporal motion information is unidirectional motion information, that is, the motion compensation candidate list includes temporal Y motion information.

[418] The first step is to determine the "availability" of motion information F, G, C, A, B and D, which may relate to Application Scenario 1.

[419] The second step can be seen in the second step of Application Scenario 4 and will not be repeated here.

[420] In the third step, for the temporary motion information that currently needs to be added to the candidate list for motion compensation (for example, the temporary unidirectional motion information and the available motion information), a duplication check is performed between the temporal motion information and unidirectional motion information in the AwpUniArray list of motion compensation candidates. If there is no duplication, temporary motion information is added to the AwpUniArray list of candidates for motion compensation.

[421] In the fourth step, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the length of the list becomes X.

[422] In the above application scenarios, X can be any positive integer, for example, X can be 4 or 5, etc.

[423] In the above application scenarios, if the length of the motion compensation candidate list AwpUniArray is less than X, repeat filling the last piece of unidirectional motion information in the motion compensation candidate list AwpUniArray until the list length becomes X. In practice, up to repeating the operation of filling the last part of the unidirectional motion information, the actual motion information can be increased by obtaining the motion information. For example, with any one piece of actual motion information (x, y, ref_idx, ListX) in the motion compensation candidate list as a basis, ref_idx and ListX represent the reference picture index and the reference picture list, respectively, which are collectively called reference picture information, and at least one piece of motion information may be added as follows: (x+a, y+b, ref_idx, ListX), where a and b can be any integers; (k1 * x, k1 * y, ref_idx_newl, ListX), where k1 is any positive integer non-zero, that is, a scaling operation is performed for the motion vector; (k2 * x, k2 * y, ref_idx_new2, ListY), where k2 is any positive integer non-zero, that is, a scaling operation is performed on the motion vector. In addition, addition of zero motion vectors may also be performed, that is, the motion information may be (0, 0, ref_idx3, ListZ). For the above motion information, when the motion information is added to the candidate list for motion compensation, the duplication check may or may not be performed. If the length of the motion compensation candidate list AwpUniArray is still less than X, the padding operation can be re-performed as above.

[424] In the above application scenarios, in addition to spatial motion information and temporal motion information, HMVP motion information can also be added to the AwpUniArray candidate list for motion compensation, and the process of adding HMVP motion information is not limited.

[425] In the above application scenarios, a list of AwpUniArray candidates for motion compensation can be constructed, and the motion information in AwpUniArray can be called candidate motion information, and then the candidate motion information can be selected from AwpUniArray as the target motion information of the current block , and then a pixel position prediction value based on the target motion information can be determined.

[426] In an exemplary implementation, two pieces of possible motion information are selected from AwpUniArray as the first target motion information and the second target motion information of the current block. Based on this, the decoder side can analyze AwpCandIdx0 and AwpCandIdx1 from the encoded bitstream and assign (AwpCandIdx0+1)-th motion information in AwpUniArray as mvAwp0L0, mvAwp0L1, RefIdxAwp0L0 and RefIdxAwp0L1, and also assign (AwpCandIdx1+1)-th traffic information in AwpUniArray as mvAwp1L0, mvAwp1L1, RefIdxAwp1L0 and RefIdxAwp1L1. The (AwpCandIdx0+1)th motion information in AwpUniArray can also be assigned as mvAwp1L0, mvAwp1L1, RefIdxAwp1L0 and RefIdxAwp1L1, and the (AwpCandIdx1+1)th motion information in AwpUniArray can be assigned as mvAwp0L0, mvAwpOLxLd 0 and RefIdxAwp0, which is here not limited.

[427] For example, AwpCandIdx0 represents the index value of the first target motion information. Therefore, the (AwpCandIdx0+1)th motion information in AwpUniArray can be assigned to the first target motion information. For example, if the value of AwpCandIdx0 is 0, the first motion information in AwpUniArray is assigned to the first target motion information; if the value of AwpCandIdx0 is 1, the second motion information in AwpUniArray is assigned to the first target motion information, etc.

[428] mvAwp0L0, mvAwp0L1, RefIdxAwp0L0 and RefIdxAwp0L1 are combined as the first target motion information, that is, the first target motion information includes unidirectional motion information pointing to List0 and unidirectional motion information pointing to List1.

[429] If the (AwpCandIdx0+1)th motion information in AwpUniArray is unidirectional motion information pointing to List0, the first target motion information includes unidirectional motion information pointing to List0 and unidirectional motion information pointing to List1 , is null.

[430] If the (AwpCandIdx0+1)th motion information in AwpUniArray is unidirectional motion information pointing to List1, the first target motion information includes unidirectional motion information pointing to List1 and unidirectional motion information pointing to List0 , is null.

[431] For example, mvAwp0L0 and RefIdxAwp0L0 represent unidirectional motion information pointing to List0 in the first target motion information, and mvAwp0L1 and RefIdxAwp0L1 represent unidirectional motion information pointing to List1 in the first target motion information.

[432] If RefIdxAwp0L0 is valid, this indicates that the unidirectional information pointing to List0 is valid. That is, the prediction mode of the first target motion information is PREDList0, that is, the pixel position prediction value of the unidirectional motion information pointing to List0 can be received.

[433] If RefIdxAwp0L1 is valid, this indicates that the one-way information pointing to List1 is valid. That is, the prediction mode of the first target motion information is PRED List1, that is, a pixel position prediction value of the unidirectional motion information pointing to List1 can be received.

[434] For example, AwpCandIdx1 represents an index value of the second target motion information. Therefore, the (AwpCandIdx1+1)th motion information in AwpUniArray can be assigned to the second target motion information. For example, if the value of AwpCandIdx1 is 0, the first motion information in AwpUniArray is assigned to the second target motion information; if the value of AwpCandIdx1 is 1, the second motion information in AwpUniArray is assigned to the second target motion information, etc.

[435] mvAwp1L0, mvAwp1L1, RefIdxAwp1L0 and RefIdxAwp1L1 are combined as second target motion information, that is, the second target motion information includes unidirectional motion information pointing to List0 and unidirectional motion information pointing to List1.

[436] If the (AwpCandIdx1+1)th motion information in AwpUniArray is unidirectional motion information pointing to List0, then the second target motion information includes unidirectional motion information pointing to List0 and unidirectional motion information pointing to List1 is null.

[437] If the (AwpCandIdx1+1)th motion information in AwpUniArray is unidirectional motion information pointing to List1, then the second target motion information includes unidirectional motion information pointing to List1 and unidirectional motion information pointing to List0 is null.

[438] For example, mvAwp1L0 and RefIdxAwp1L0 represent unidirectional motion information pointing to List0 in the second target motion information, and mvAwp1L1 and RefIdxAwp1L1 represent unidirectional motion information pointing to List1 in the second target motion information.

[439] If RefIdxAwp1L0 is valid, this indicates that the one-way information pointing to List0 is valid. That is, the prediction mode of the second target motion information is PRED List0, that is, a pixel position prediction value of the unidirectional motion information pointing to List0 can be received.

[440] If RefIdxAwp1L1 is valid, this indicates that the one-way information pointing to List1 is valid. That is, the prediction mode of the second target motion information is PRED_List1, that is, a pixel position prediction value of the unidirectional motion information pointing to List1 can be received.

[441] In another possible implementation, one piece of possible motion information may be selected from AwpUniArray as the target motion information of the current block. The decoder side can parse the AwpCandIdx from the encoded bitstream and assign the (AwpCandIdx+1)th motion information to the AwpUniArray as mvAwpL0, mvAwpL1, RefIdxAwpL0 and RefIdxAwpL1. AwpCandIdx represents the index value of the motion target information, mvAwpL0, mvAwpL1, RefIdxAwpL0 and RefIdxAwpL1 together as the motion target information. mvAwpL0 and RefIdxAwpL0 represent unidirectional motion information pointing to List0 in the target motion information, and mvAwpL1 and RefIdxAwpL1 represent unidirectional motion information pointing to List1 in the target motion information.

[442] For example, embodiments 1-16 of the invention may be implemented individually or in combination. For example, embodiment 1 of the invention may be implemented in combination with embodiment 2 of the invention; Embodiment 1 of the invention may be implemented in combination with Embodiment 3 of the invention; Embodiment 1, Embodiment 2 and Embodiment 3 may be implemented in combination; Embodiment 4 may be implemented in combination with one or more embodiments 1 to 3; Embodiment 5 of the invention may be implemented in combination with one or more embodiments 1-3 of the invention; Embodiment 6 may be implemented in combination with one or more embodiments 1 to 3; Embodiment 7 may be implemented in combination with one or more embodiments 1 to 3; Embodiment 8 may be implemented in combination with one or more embodiments 1 to 3; Embodiment 9 may be implemented in combination with one or more embodiments 1 to 3; Embodiment 10 of the invention may be implemented in combination with one or more embodiments 1-3 of the invention; Embodiment 11 of the invention may be implemented in combination with one or more embodiments 1-3 of the invention; Embodiment 12 of the invention may be implemented in combination with one or more embodiments 1-3 of the invention; Embodiment 13 may be implemented in combination with one or more embodiments 1 to 3; Embodiment 14 may be implemented in combination with one or more embodiments 1-3; Embodiment 15 of the invention may be implemented in combination with one or more embodiments 1-3 of the invention; Embodiment 16 may be implemented in combination with one or more embodiments 1-3; The above are examples only, and there are no restrictions on how embodiments of the invention may be combined with each other.

[443] It should be noted that in the above embodiments of the invention, the method used by the encoder side and the method used by the decoder side may refer to each other.

[444] Embodiment 17 of the invention. Based on the same application idea as the method described above, embodiments of the present invention also provide encoding and decoding equipment applied on the encoder side or on the decoder side, see FIG. 10A, which shows a block diagram of equipment including an acquisition module 111, a configuration module 112, and a determination module 113.

[445] The acquisition unit 111 is configured to obtain the weighted prediction angle and weight configuration parameters of the current block when it is determined that weighted prediction should be enabled for the current block, the weight configuration parameters including a weight conversion factor and a weight conversion starting position.

[446] Configuration module 112 is configured to configure reference weight values for surrounding positions outside the current block based on the current block's weight configuration parameters.

[447] The determining unit 113 is 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; determining a target pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[448] If the current block supports the weight conversion coefficient switching mode, the acquiring unit 111 obtains the weight conversion coefficient of the current block by doing the following: obtaining first weight conversion coefficient indication information for the current block; determining the weight conversion coefficient of the current block based on the first weight conversion coefficient indication information. If the first weight conversion factor indication information is the first indication information, the weight conversion factor of the current block is the first weight conversion factor, and if the first weight conversion factor indication information is the second indication information, the current block's weight conversion factor is the second weight conversion factor.

[449] The first weight conversion coefficient indication information is image level indication information, the first weight conversion coefficient indication information in the current block represents the weight conversion coefficient switching identification corresponding to the current block, the first indication information is for indicating that the current block does not require coefficient switching weight conversion, and the second indication information is for indicating that the current block requires switching the weight conversion factor. The absolute value of the first weight conversion factor is not equal to the absolute value of the second weight conversion factor.

[450] If the current block supports the weight conversion coefficient switching mode, the acquiring unit 111 obtains the weight conversion coefficient of the current block by doing the following: obtaining second weight conversion coefficient indication information for the current block; selecting a weight conversion coefficient corresponding to the second weight conversion coefficient indication information from a predetermined lookup table; wherein the specified lookup table includes at least two weight conversion factors; and determining the selected weight conversion factor as the weight conversion factor of the current block.

[451] For example, when configuring reference weight values for surrounding positions outside the current block in accordance with the weight configuration parameters, the configuration module 112 is specifically used to do the following: for each surrounding position outside the current block, configuring the reference weight value of the surrounding position according to the coordinate value of the surrounding position, the coordinate value of the starting position of the weight transformation, and the weight transformation coefficient.

[452] For example, the starting position of the weight transformation is determined by at least one of the weighted prediction angle, the weighted prediction position of the current block, or the size of the current block. 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. The reference weights of surrounding positions outside the current block increase monotonically. Surrounding positions outside the current block include one or more whole pixel positions and/or one or more subpixel positions. Surrounding positions outside the current block include surrounding positions one row above the current block and/or surrounding positions one column to the left of the current block.

[453] 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 neighboring positions of the target positions. All reference weights of the first adjacent positions are a second reference weight, and all reference weights of the second adjacent positions are a third reference weight, wherein the second reference weight is different from the third reference weight. The target positions include one reference weight value or at least two reference weight values, if the target positions include at least two reference weight values, the at least two reference weight values of the target positions increase monotonically.

[454] The weighted prediction angle is a horizontal angle; or the weighted prediction angle is a vertical angle; or the absolute value of the slope of the weighted prediction angle is the nth power of 2, where n is an integer.

[455] For example, the determination unit 113 is also configured to do the following: if the surrounding corresponding position is an integer pixel position, and the integer pixel position is configured with a reference weight value, determining a target pixel position weight value based on the reference integer pixel position weight value; or, if the surrounding corresponding position is a subpixel position, and the subpixel position is configured with a reference weight value, determining a target pixel position weight value based on the reference subpixel position weight value.

[456] If the first prediction mode is an inter prediction mode, the determining unit 113 is also configured to obtain a motion compensation candidate list including at least one piece of possible motion information; selecting one piece of possible motion information from the candidate list for motion compensation as the initial motion information of the current block; determining target motion information of the current block based on the original motion information; and determining a first pixel position prediction value based on the target motion information.

[457] The source motion information includes a source motion vector, the target motion information includes a target motion vector, and the determining unit 113 is also configured to obtain a motion vector difference corresponding to the source motion vector; and determining a target motion vector based on the difference of the motion vectors and the source motion vector.

[458] On the decoder side, the determining unit 113 is also designed to analyze direction information and motion vector difference amplitude information from the encoded bitstream of the current block; determining the motion vector difference based on the direction information and the amplitude information of the motion vector difference.

[459] If 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 the direction information indicates the downward direction and the amplitude information indicates that the amplitude is equal to Ad, the difference of motion vectors is equal to (0, -Ad). If the direction information indicates the left direction and the amplitude information indicates that the amplitude is A1, the motion vector difference is (-A1, 0). If the direction information indicates the upward direction and the amplitude information indicates that the amplitude is Au, the motion vector difference is (0, Au).

[460] On the decoder side, the determining unit 113 is also configured to analyze flag information from the encoded bitstream of the current block; if the flag information indicates superposition of the motion vector difference on the original motion vector, analyzing the direction information and amplitude information of the motion vector difference from the encoded bit stream of the current block.

[461] Determination unit 113 is also configured to obtain at least one piece of available motion information to add to the motion compensation candidate list, and construct a list of motion compensation candidates based on the at least one piece of available motion information.

[462] At least one piece of available motion information includes at least one of the following motion information: spatial motion information; temporary traffic information; or preset motion information.

[463] As for the apparatus embodiment, since it basically corresponds to the method embodiment, a relevant part may refer to the description of the method embodiment. The device embodiments described above are merely illustrative, where blocks described as separate components may or may not be physically separate, and components shown as blocks may or may not be physical blocks, i.e., may be located in the same location or distributed across multiple devices on a network. Some or all of the modules may be selected according to practical needs to achieve the purpose of the solutions of the present embodiment. Those skilled in the art can understand and implement solutions without performing creative work.

[464] Based on the same application idea as in the above methods, embodiments of the present invention provide a decoder-side device (also called a video decoder). In terms of hardware, the hardware architecture is shown in FIG. 10V. The decoder-side apparatus includes one or more processors 121 and a computer-readable medium 122, wherein the computer-readable medium 122 stores computer-readable instructions executable by the processor 121. The processor 121 is configured to execute the computer-readable instructions to perform the methods described above. For example, processor 121 is configured to execute machine-readable instructions to do the following: when it is determined that weighted prediction should be enabled for the current block, obtaining the weighted prediction angle and weight configuration parameters of the current block; wherein the parameters of the weight configuration include the weight conversion factor and the initial position of the weight conversion; configuring reference weight values for surrounding positions outside the current block in accordance with the parameters of the weight configuration; 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 pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[465] Based on the same application idea as the above methods, embodiments of the present invention provide an encoder-side device (also called a video encoder). In terms of hardware, the hardware architecture is shown in FIG. 10C. The decoder-side apparatus includes one or more processors 131 and a computer-readable medium 132, wherein the computer-readable medium 132 stores computer-readable instructions executable by the processor 131. The processor 131 is configured to execute the computer-readable instructions to perform the methods described above. For example, processor 131 is configured to execute machine-readable instructions to do the following: when it is determined that weighted prediction should be enabled for the current block, obtaining the weighted prediction angle and weight configuration parameters of the current block; wherein the parameters of the weight configuration include the weight conversion factor and the initial position of the weight conversion; configuring reference weight values for surrounding positions outside the current block in accordance with the parameters of the weight configuration; 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 pixel position weight value 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; 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; 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; determining a weighted prediction value of the current block based on the weighted prediction values of all pixel positions in the current block.

[466] Based on the same application idea as in the above-described methods, embodiments of the present invention also provide a camera device that may include encoding and decoding equipment in any of the above-mentioned embodiments. The camera device can use the processes described above.

[467] Based on the same application idea as the above-described methods, embodiments of the present invention provide a computer-readable storage medium storing multiple computer instructions that are executed by a processor to perform the methods disclosed in the above embodiments of the present invention, such as encoding methods and decoding in the embodiments described above.

[468] The systems, devices, modules or blocks described in the above embodiments of the invention may be implemented as computer chips or objects or as products with certain functions. A typical implementation device is a computer, and a computer, in a specific form, may be a personal computer, laptop computer, cell phone, camera phone, smartphone, personal digital assistant, media player, navigation equipment, email transceiver, game console, tablet computer, wearable equipment or a combination of any of these devices. For convenience, the above-mentioned devices are described in different blocks according to their functions. In implementing the present invention, the functions of the various blocks may be implemented in software and/or hardware.

[469] Those skilled in the art will appreciate that embodiments of the present invention may be provided in the form of methods, systems, or computer program products. Therefore, the present invention may take the form of a pure hardware embodiment, a pure software embodiment, or an embodiment combining both software and hardware. In addition, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-accessible storage media (including, but not limited to, disk storage devices, CD-ROMs, optical storage devices, etc.) that comprise computer-accessible program codes.

[470] The above description represents only some examples of the present invention and does not limit the invention. Those skilled in the art will understand that the present invention is subject to various changes and modifications. Any modifications, equivalent replacements, improvements, etc. of the present invention are within the scope of the claims.

Claims (78)

1. A video decoding method, including: when it is determined that weighted prediction should be enabled for the current block, obtaining a weighted prediction angle of the current block and weight configuration parameters of the current block, wherein the weight configuration parameters include a weight conversion factor and a weight conversion starting position; configuring one or more reference weight values for surrounding positions outside the current block based on the weight configuration parameters; 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; 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 in the current block. 2. The method of claim 1, wherein, in response to determining that the current block supports a weight conversion factor switching mode, obtaining the current block's weight conversion factor includes: obtaining first information indicating the weight conversion coefficient for the current block; And determining the weight conversion coefficient of the current block based on the first weight conversion coefficient indication information, wherein in response to determining that the first weight conversion coefficient indication information is the first indication information, the weight conversion coefficient of the current block is the first weight conversion coefficient, and in response to determining that the first weight conversion factor indication information is the second indication information, the weight conversion factor of the current block is the second weight conversion factor. 3. The method according to claim 2, wherein the first weight conversion coefficient indication information contains image level indication information, the first weight conversion coefficient indication information for the current block represents a weight conversion coefficient switching identification corresponding to the current block, the first indication information is for indicating whether that the current block does not require switching of the weight conversion factor, and the second indication information is for indicating that the current block requires switching of the weight conversion factor. 4. The method of claim 1, wherein, in response to determining that the current block supports a weight conversion factor switching mode, obtaining the current block's weight conversion factor includes: obtaining second information indicating a weight conversion factor for the current block; selecting a weight conversion coefficient corresponding to the second weight conversion coefficient indication information from a predetermined lookup table, wherein the predetermined lookup table contains at least two weights conversion coefficients; And defining the selected weight conversion factor as the current block's weight conversion factor. 5. The method of claim 1, wherein configuring one or more reference weight values for surrounding positions outside the current block based on the weight configuration parameters includes: for each of the surrounding positions outside the current block, configuring a reference weight value of the surrounding position based on the coordinate value of the surrounding position, the coordinate value of the weight conversion starting position, and the weight conversion factor. 6. The method according to claim 1, wherein the initial position of the weight transformation is determined by at least one of the following parameters: weighted prediction angle, weighted prediction position of the current block or current block size. 7. The method of claim 1, 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; the reference weights of surrounding positions outside the current block increase monotonically; surrounding positions outside the current block include one or more whole pixel positions and/or one or more subpixel positions; And surrounding positions outside the current block include surrounding positions adjacent to the top side of the current block and/or surrounding positions adjacent to the left side of the current block. 8. The method of claim 1, wherein the one or more reference weights of surrounding positions outside the current block includes 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 target positions second adjacent positions of target positions, wherein all one or more reference weight values of the first adjacent positions are a second reference weight value, and all one or more reference weight values of the second adjacent positions are a third reference weight value, wherein the second reference weight value is different from the third reference weight value. 9. The method of claim 8, wherein the target positions include one reference weight value, or at least two reference weight values, in response to determining that the target positions include at least two reference weight values, at least two reference weight values the values of target positions increase monotonically. 10. The method according to claim 1, in which The weighted prediction angle is a horizontal angle; or The weighted prediction angle is a vertical angle; or the absolute value of the slope of the weighted prediction angle is equal to the nth power number 2, where n is an integer. 11. The method of claim 1, wherein determining a target weight value of a pixel position based on a reference weight value associated with a surrounding corresponding position includes: in response to determining that the surrounding corresponding position is a whole pixel position and the whole pixel position is configured with a reference weight value, determining a target pixel position weight value based on the reference whole pixel position weight value; And in response to determining that the surrounding corresponding position is a subpixel position, and the subpixel position is configured with a reference weight value, determining a target pixel position weight value based on the reference subpixel position weight value. 12. The method of claim 1, wherein, in response to determining that the first prediction mode is an inter prediction mode, determining a first pixel position prediction value based on the first prediction mode of the current block includes: obtaining a list of candidates for motion compensation, wherein the list of candidates for motion compensation contains at least one piece of information about a possible motion; selecting one piece of possible motion information from the candidate list for motion compensation as the initial motion information of the current block; determining target motion information for the current block based on the source motion information; And determining a first pixel position prediction value based on the target motion information. 13. The method according to claim 12, wherein the source motion information contains a source motion vector, the target motion information contains a target motion vector, determining the target motion information of the current block based on the source motion information includes: obtaining a motion vector difference corresponding to the original motion vector; And determining the target motion vector based on the difference between the motion vectors and the original motion vector. 14. The method according to claim 13, wherein obtaining a motion vector difference corresponding to the original motion vector includes: analyzing information about the direction of the motion vector difference and information about the amplitude of the motion vector difference from the encoded bit stream of the current block; And determining the motion vector difference based on information about the direction of the motion vector difference and information about the amplitude of the motion vector difference. 15. The method according to claim 14, in which in response to determining that the direction information indicates a rightward direction and the amplitude information indicates that the amplitude is Ar, the motion vector difference is (Ar, 0); in response to determining 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); in response to determining that the direction information indicates a left direction and the amplitude information indicates that the amplitude is A1, the motion vector difference is (-A1, 0); And in response to determining that the direction information indicates an upward direction and the amplitude information indicates that the amplitude is Au, the motion vector difference is (0, Au). 16. The method according to claim 14, wherein analyzing information about the direction of the motion vector difference and information about the amplitude of the motion vector difference from the encoded bitstream of the current block includes: parsing flag information from the encoded bitstream of the current block, and in response to determining that the flag information indicates superposition of the motion vector difference on the original motion vector, analyzing information about the direction of the motion vector difference and information about the amplitude of the motion vector difference from the encoded bit stream of the current block. 17. The method according to claim 12, in which building a list of candidates for motion compensation includes: obtaining at least one piece of available motion information for adding to a candidate list for motion compensation; And constructing a list of candidates for motion compensation based on said at least one piece of available motion information. 18. The method of claim 17, wherein said at least one piece of available traffic information includes at least one of the following traffic information: spatial information about movement; temporary traffic information; or preset motion information. 19. A video encoding method, including: when it is determined that weighted prediction should be enabled for the current block, obtaining a weighted prediction angle of the current block and weight configuration parameters of the current block, wherein the weight configuration parameters include a weight conversion factor and a weight conversion starting position; configuring one or more reference weight values for surrounding positions outside the current block based on the weight configuration parameters; 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; 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 in the current block. 20. A video decoder comprising: a processor and a computer-readable storage medium, wherein the computer-readable storage medium stores computer-readable instructions executable by the processor, and the processor is configured to execute the computer-readable instructions for performing the method of any one of claims 1 to 18. 21. A video encoder comprising: a processor and a computer-readable storage medium, wherein the computer-readable storage medium stores computer-readable instructions executable by the processor, and the processor is configured to execute the computer-readable instructions to perform the method of claim 19.

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