# US 11,909,955 B2 · Image signal encoding/decoding method and apparatus therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,955 B2 - Document ID: US11909955B2 - Status: Granted - Kind: B2 - Application number: 17/646,678 - Filed: 2021-12-30 - Published: 2022-04-21 - Granted: 2024-02-20 - Earliest claimed: 2018-11-08 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Bae Keun Lee - Web page: https://patentgrep.com/patent/US11909955B2 ## CPC - H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction - H04N 19/577: Motion compensation with bidirectional frame interpolation, i.e. using B-pictures - H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks - H04N 19/132: Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking - H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/52: by predictive encoding - H04N 19/573: Motion compensation with multiple frame prediction using two or more reference frames in a given prediction direction - H04N 19/593: involving spatial prediction techniques - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An image decoding method according to the present disclosure may include the steps of: determining whether a combined prediction mode is applied to a current block; when the combined prediction mode is applied to the current block, obtaining first and second prediction blocks with respect to the current block; and, on the basis of a calculation of a weighted sum of the first and second prediction blocks, obtaining a third prediction block with respect to the current block. ## Claims ### Claim 1 A video decoding method comprising the steps of: determining whether or not to apply a combined prediction mode to a current block; obtaining a first prediction block and a second prediction block for the current block when the combined prediction mode is applied to the current block, wherein the first prediction block is obtained based on motion information of a merge candidate of the current block, and the second prediction block is obtained based on an intra prediction mode of the current block; and obtaining a third prediction block for the current block based on a weighted sum operation of the first prediction block and the second prediction block wherein when at least one among a width and a height of the current block is greater than a threshold value, the combined prediction mode is not applied to the current block; wherein in performing the weighted sum operation, weighting values applied to the first prediction block and the second prediction block are determined based on prediction modes of neighboring blocks adjacent to the current block; wherein when the combined prediction mode is applied to the current block, triangular partitioning is disabled for the current block. ### Claim 2 (depends on 1) The method according to claim 1, wherein the intra prediction mode of the current block is set to a planar mode. ### Claim 3 (depends on 2) The method according to claim 2, wherein the second prediction block is obtained based on a reference sample line included in an adjacent reference sample line. ### Claim 4 A video encoding method comprising the steps of: determining whether or not to apply a combined prediction mode to a current block; obtaining a first prediction block and a second prediction block for the current block when the combined prediction mode is applied to the current block, wherein the first prediction block is obtained based on motion information of a merge candidate of the current block, and the second prediction block is obtained based on an intra prediction mode of the current block; and obtaining a third prediction block for the current block based on a weighted sum operation of the first prediction block and the second prediction block, wherein when at least one among a width and a height of the current block is greater than a threshold value, the combined prediction mode is not applied to the current block; wherein in performing the weighted sum operation, weighting values applied to the first prediction block and the second prediction block are determined based on prediction modes of neighboring blocks adjacent to the current block; wherein when the combined prediction mode is applied to the current block, triangular partitioning is disabled for the current block. ### Claim 5 (depends on 4) The method according to claim 4, wherein the intra prediction mode of the current block is set to a planar mode. ### Claim 6 (depends on 5) The method according to claim 5, wherein the second prediction block is obtained based on a reference sample line included in an adjacent reference sample line. ### Claim 7 A video decoding apparatus comprising: a processor and a memory configured to store a computer program capable of being run on the processor, wherein the processor is configured to determine whether or not to apply a combined prediction mode to a current block, obtain a first prediction block and a second prediction block for the current block when the combined prediction mode is applied to the current block, and obtain a third prediction block for the current block based on a weighted sum operation of the first prediction block and the second prediction block, and the first prediction block is obtained based on motion information of a merge candidate of the current block, and the second prediction block is obtained based on an intra prediction mode of the current block, wherein when at least one among a width and a height of the current block is greater than a threshold value, the combined prediction mode is not applied to the current block; wherein in performing the weighted sum operation, weighting values applied to the first prediction block and the second prediction block are determined based on prediction modes of neighboring blocks adjacent to the current block; wherein when the combined prediction mode is applied to the current block, triangular partitioning is disabled for the current block. ### Claim 8 (depends on 7) The video decoding apparatus according to claim 7, wherein the intra prediction mode of the current block is set to a planar mode. ### Claim 9 (depends on 8) The video decoding apparatus according to claim 8, wherein the second prediction block is obtained based on a reference sample line included in an adjacent reference sample line. ### Claim 10 A video encoding apparatus comprising: a processor and a memory configured to store a computer program capable of being run on the processor, wherein the processor is configured to determine whether or not to apply a combined prediction mode to a current block; obtain a first prediction block and a second prediction block for the current block when the combined prediction mode is applied to the current block, wherein the first prediction block is obtained based on motion information of a merge candidate of the current block, and the second prediction block is obtained based on an intra prediction mode of the current block; and obtain a third prediction block for the current block based on a weighted sum operation of the first prediction block and the second prediction block, wherein when at least one among a width and a height of the current block is greater than a threshold value, the combined prediction mode is not applied to the current block; wherein in performing the weighted sum operation, weighting values applied to the first prediction block and the second prediction block are determined based on prediction modes of neighboring blocks adjacent to the current block; wherein when the combined prediction mode is applied to the current block, triangular partitioning is disabled for the current block. ### Claim 11 (depends on 10) The video encoding apparatus according to claim 10, wherein the intra prediction mode of the current block is set to a planar mode. ### Claim 12 (depends on 11) The video encoding apparatus according to claim 11, wherein the second prediction block is obtained based on a reference sample line included in an adjacent reference sample line.