INTER-PREDICTION METHOD AND DEVICE BASED ON DMVR AND BDOF

    公开(公告)号:US20230045157A1

    公开(公告)日:2023-02-09

    申请号:US17959001

    申请日:2022-10-03

    Abstract: An image decoding method includes: deriving a refined L0 motion vector and a refined L1 motion vector by applying decoder-side motion vector refinement (DMVR) based on an L0 motion vector and an L1 motion vector of a current block, deriving prediction samples for the current block based on L0 prediction samples derived based on the refined L0 motion vector and L1 prediction samples derived based on the refined L1 motion vector, and generating reconstructed samples for the current block based on the prediction samples. The L0 prediction samples are derived based on an L0 reference picture and the refined L0 motion vector, and the L1 prediction samples are derived based on an L1 reference picture and the refined L1 motion vector, and deriving the prediction samples comprises determining whether to apply bi-directional optical flow (BDOF) process based on a first POC difference and a second POC difference are the same.

    METHOD AND DEVICE FOR SYNTAX SIGNALING IN VIDEO/IMAGE CODING SYSTEM

    公开(公告)号:US20220239918A1

    公开(公告)日:2022-07-28

    申请号:US17615702

    申请日:2020-06-23

    Abstract: A decoding method performed by a decoding device according to the present document comprises: a step for acquiring, from a bitstream, at least one among a combined inter-picture merge and intra-picture prediction (CIIP) available flag, which indicates whether or not CIIP is available, and a partitioning mode available flag, which indicates whether or not a partitioning mode for dividing a current block into two partitions and performing prediction is available; a step for determining the prediction mode of the current block on the basis of at least one among the CIIP available flag and the partitioning mode available flag; and a step for generating prediction samples of the current block on the basis of the prediction mode, wherein the step for determining the prediction mode may include a step for acquiring a regular merge flag from the bitstream on the basis of at least one among the CIIP available flag and the partitioning mode available flag

    METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL

    公开(公告)号:US20220182614A1

    公开(公告)日:2022-06-09

    申请号:US17436838

    申请日:2020-03-06

    Inventor: Hyeongmoon JANG

    Abstract: Embodiments of the present specification provide encoding and decoding methods for a video signal for an inter prediction. The decoding method according to an embodiment of the present specification comprises the steps of: identifying the size of a current block; acquiring an intra block copy (IBC) flag indicating whether or not an IBC is applied to the current block on the basis of the size of the current block and an IBC-allowed block size; determining the prediction mode of the current block on the basis of the IBC flag; and performing prediction of the current block from a reconstructed block in the current picture on the basis of the prediction mode. According to an embodiment of the present specification, coding complexity and coding time can be reduced by encoding/decoding a syntax element related to whether or not IBC mode is applied in consideration of a limited block size.

    IMAGE DECODING METHOD FOR DERIVING PREDICTED SAMPLE BY USING MERGE CANDIDATE AND DEVICE THEREFOR

    公开(公告)号:US20220124312A1

    公开(公告)日:2022-04-21

    申请号:US17561642

    申请日:2021-12-23

    Abstract: The present invention relates to a method for encoding and decoding images, wherein, if bi-prediction is applied, a weight for a merge candidate is derived, thereby improving the image compression efficiency, and making it possible to efficiently configure a motion vector candidate. A merge candidate list of the current block is produced on the basis of inter-prediction information, and the candidate includes a configured affine merge candidate. If the configured affine merge candidate is produced on the basis of a combination of control points including CP0, weight index information regarding the configured affine merge candidate is produced on the basis of weight index information regarding CP0. If the configured affine merge candidate is produced on the basis of a combination of control points excluding CP0, weight index information regarding the configured affine merge candidate is derived on the basis of weight index information regarding CP1.

    SIGNALING METHOD AND DEVICE FOR MERGE DATA SYNTAX IN VIDEO/IMAGE CODING SYSTEM

    公开(公告)号:US20220109883A1

    公开(公告)日:2022-04-07

    申请号:US17429569

    申请日:2020-06-23

    Abstract: A decoding method performed by a decoding device according to the present document comprises: a step for determining the prediction mode of a current block on the basis of information on a prediction mode acquired from a bitstream; a step for deriving movement information on the current block on the basis of the prediction mode; a step for generating prediction samples of the current block on the basis of the movement information; and a step for generating reconstructed samples on the basis of the prediction samples, wherein the step for determining the prediction mode may include a step for acquiring a regular merge flag from the bitstream on the basis of a combined inter-picture merge and intra-picture prediction (CIIP) available flag that indicates whether or not a CIIP is available.

    METHOD AND DEVICE FOR CODING IMAGE ON BASIS OF INTER PREDICTION

    公开(公告)号:US20220109850A1

    公开(公告)日:2022-04-07

    申请号:US17555052

    申请日:2021-12-17

    Abstract: A decoding method performed by a decoding device, according to the present document, may comprise the steps of: acquiring, from a bitstream, at least one of a combined inter-picture merge and intra-picture prediction (CIIP) enable flag and a coding unit (CU) skip flag indicating whether a skip mode is applied to a current block; acquiring, from the bitstream, a regular merge flag on the basis that a condition based on the current block size, and at least one of a condition based on the CIIP enable flag and a condition based on the CU skip flag are satisfied; generating prediction samples of the current block on the basis of the regular merge flag; and generating restoration samples on the basis of the prediction samples.

Patent Agency Ranking