# US 12,604,031 B2 · System and method for combined inter and intra prediction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,031 B2 - Document ID: US12604031B2 - Status: Granted - Kind: B2 - Application number: 18/653,957 - Filed: 2024-05-02 - Published: 2024-08-22 - Granted: 2026-04-14 - Earliest claimed: 2019-01-09 - Assignees: Beijing Dajia Internet Information Technology Co., Ltd. - Applicants: Beijing Dajia Internet Information Technology Co., Ltd. - Inventors: Xiaoyu Xiu; Yi-Wen Chen; Xianglin Wang - Web page: https://patentgrep.com/patent/US12604031B2 ## CPC - H04N 19/109: among a plurality of temporal predictive coding modes - H04N 19/527: Global motion vector estimation - 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 19/107: between spatial and temporal predictive coding, e.g. picture refresh - H04N 19/11: among a plurality of spatial predictive coding modes - 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 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - H04N 19/577: Motion compensation with bidirectional frame interpolation, i.e. using B-pictures - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method for video encoding is provided. The method includes: generating, by an encoder, an inter prediction of a current coding block based on an inter prediction mode; generating, by the encoder, an intra prediction of the current coding block based on an intra prediction mode; generating, by the encoder, a final prediction of the current coding block based on the inter prediction and the intra prediction; determining, by the encoder, that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode; and forming, by the encoder, a video bit-stream with information that a combined inter and intra prediction mode is applied to the current coding block. ## Claims ### Claim 1 A method of video encoding, comprising: generating an inter prediction of a current coding block based on an inter prediction mode; generating an intra prediction of the current coding block based on an intra prediction mode; generating a final prediction of the current coding block based on the inter prediction and the intra prediction; determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode; and forming a video bit-stream with information that a combined inter and intra prediction mode is applied to the current coding block. ### Claim 2 (depends on 1) The method of claim 1, wherein generating the inter prediction of the current coding block based on the inter prediction mode comprises: generating the inter prediction of the current coding block based on at least one motion vector from a current picture to at least one reference picture of a reference picture list respectively. ### Claim 3 (depends on 2) The method of claim 2, wherein the reference picture list is a first reference picture list L0 when the inter prediction of the current coding block is performed from one reference picture in the first reference picture list L0. ### Claim 4 (depends on 2) The method of claim 2, wherein the reference picture list is a second reference picture list L1 when the inter prediction of the current coding block is performed from one reference picture in the second reference picture list L1. ### Claim 5 (depends on 2) The method of claim 2, wherein the reference picture list is associated with one first reference picture in a first reference list L0 or one second reference picture in a second reference picture list L1 that has a smaller picture order count (POC) distance to the current picture when the inter prediction of the current coding block is performed from the one first reference picture and the one second reference picture. ### Claim 6 (depends on 1) The method of claim 1, wherein generating the intra prediction of the current coding block based on the intra prediction mode comprises: generating the intra prediction of the current coding block based on an intra PLANAR prediction mode. ### Claim 7 (depends on 1) The method of claim 1, wherein a bidirectional optical flow (BDOF) operation is disabled for the current coding block. ### Claim 8 A video encoding device, comprising one or more processors and one or more storages coupled to the one or more processors, wherein the video encoding device is configured to perform operations comprises: generating an inter prediction of a current coding block based on an inter prediction mode; generating an intra prediction of the current coding block based on an intra prediction mode; generating a final prediction of the current coding block based on the inter prediction and the intra prediction; determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode; and forming a video bit-stream with information that a combined inter and intra prediction mode is applied to the current coding block. ### Claim 9 (depends on 8) The video encoding device of claim 8, wherein generating the inter prediction of the current coding block based on an inter prediction mode comprises: generating the inter prediction of the current coding block based on at least one motion vector from a current picture to at least one reference picture of a reference picture list respectively. ### Claim 10 (depends on 9) The video encoding device of claim 9, wherein the reference picture list is a first reference picture list L0 when the inter prediction of the current coding block is performed from one reference picture in the first reference picture list L0. ### Claim 11 (depends on 9) The video encoding device of claim 9, wherein the reference picture list is a second reference picture list L1 when the inter prediction of the current coding block is performed from one reference picture in the second reference picture list L1. ### Claim 12 (depends on 9) The video encoding device of claim 9, wherein the reference picture list is associated with one first reference picture in a first reference picture list L0 or one second reference picture in a second reference picture list L1 that has a smaller picture order count (POC) distance to the current picture when the inter prediction of the current coding block is performed from the one first reference picture and the one second reference picture. ### Claim 13 (depends on 8) The video encoding device of claim 8, wherein generating the intra prediction of the current coding block based on the intra prediction mode comprises: generating the intra prediction of the current coding block based on an intra PLANAR prediction mode. ### Claim 14 (depends on 8) The video encoding device of claim 8, wherein a bidirectional optical flow (BDOF) operation is disabled for the current coding block. ### Claim 15 (depends on 1) A method for storing a bitstream, comprising: performing the encoding method according to claim 1 to generate a bitstream; and storing the bitstream on a non-transitory computer readable storage medium. ### Claim 16 (depends on 15) The method of claim 15, wherein generating the inter prediction of the current coding block based on the inter prediction mode comprises: generating the inter prediction of the current coding block based on at least one motion vector from a current picture to at least one reference picture of a reference picture list respectively. ### Claim 17 (depends on 16) The method of claim 16, wherein the reference picture list is a first reference picture list L0 when the inter prediction of the current coding block is performed from one reference picture in the first reference picture list L0. ### Claim 18 (depends on 16) The method of claim 16, wherein the reference picture list is a second reference picture list L1 when the inter prediction of the current coding block is performed from one reference picture in the second reference picture list L1. ### Claim 19 (depends on 15) The method of claim 15, wherein generating the intra prediction of the current coding block based on the intra prediction mode comprises: generating the intra prediction of the current coding block based on an intra PLANAR prediction mode. ### Claim 20 A method of video decoding, comprising: receiving a video bit-stream, wherein the video bit-stream is formed with information that a combined inter and intra prediction mode is applied to the current coding block; generating an inter prediction of a current coding block based on an inter prediction mode; generating an intra prediction of the current coding block based on an intra prediction mode; generating a final prediction of the current coding block based on the inter prediction and the intra prediction; and determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode.