IMAGE/VIDEO CODING METHOD AND DEVICE

    公开(公告)号:US20250097424A1

    公开(公告)日:2025-03-20

    申请号:US18962039

    申请日:2024-11-27

    Abstract: A video decoding method performed by a video decoding device according to the present document comprises the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header; parsing, from the picture header, a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; and generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of the first flag or the second flag.

    METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL BASED ON HISTORY BASED MOTION VECTOR PREDICTION

    公开(公告)号:US20250008150A1

    公开(公告)日:2025-01-02

    申请号:US18882635

    申请日:2024-09-11

    Abstract: The disclosure discloses a method for processing video signals and an apparatus therefor. Specifically, the method of processing video signals based on inter prediction, comprising: configuring a merge candidate list based on a spatial neighboring block and a temporal neighboring block to a current block; adding a history-based merge candidate of the current block to the merge candidate list; obtaining a merge index indicating a merge candidate used for an inter prediction of the current block within the merge candidate list; generating a prediction sample of the current block based on motion information of the merge candidate indicated by the merge index; and updating a history-based merge candidate list based on the motion information.

    VIDEO CODING METHOD BASED ON SECONDARY TRANSFORM, AND DEVICE THEREFOR

    公开(公告)号:US20240406394A1

    公开(公告)日:2024-12-05

    申请号:US18749048

    申请日:2024-06-20

    Abstract: A video decoding method according to the present document comprises the steps of: deriving transform coefficients by performing de-quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) of the transform coefficients; and generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein an inverse RST using a transform kernel matrix is performed on transform coefficients of an upper-left 4×4 region of an 8×8 region of the target block, and modified transform coefficients of the upper-left 4×4 region, an upper-right 4×4 region, and a lower-left 4×4 region of the 8×8 region are derived through the inverse RST.

    IMAGE CODING DEVICE AND METHOD
    127.
    发明申请

    公开(公告)号:US20240397051A1

    公开(公告)日:2024-11-28

    申请号:US18793081

    申请日:2024-08-02

    Abstract: In relation to an in-loop filtering procedure described in the present document, a virtual boundary is defined so as to further increase the subjective/objective visual quality of a restored picture and the in-loop filtering procedure can be applied across the virtual boundary. The virtual boundary can include, for example, a discontinuous edge such as a 360-degree image, a VR image, or picture in picture (PIP). For example, the virtual boundary can be at a predetermined appointed position, and the existence and/or the position thereof can be signaled. Embodiments of the present document present a method for efficiently signaling virtual boundary-related information.

    VIDEO DECODING METHOD USING RESIDUAL INFORMATION IN VIDEO CODING SYSTEM, AND APPARATUS THEREOF

    公开(公告)号:US20240380910A1

    公开(公告)日:2024-11-14

    申请号:US18782189

    申请日:2024-07-24

    Abstract: A video decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: receiving residual information for a current block; deriving a context model for a sine flag of a current residual coefficient in a current sub-block of the current block; decoding the sine flag on the basis of the context model; deriving the current residual coefficient on the basis of the sine flag; deriving a residual sample on the basis of the current residual coefficient; and generating a reconstructed picture on the basis of the residual sample, wherein the context model for the sine flag is derived on the basis of a sine flag of a residual coefficient decoded before the current residual coefficient in the current sub-block.

    INTRA PREDICTION METHOD ON BASIS OF MPM LIST AND APPARATUS THEREFOR

    公开(公告)号:US20240357077A1

    公开(公告)日:2024-10-24

    申请号:US18632155

    申请日:2024-04-10

    Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining intra prediction information including at least one of MPM flag information, MRL index information, and planner flag information from a bitstream; checking the MPM flag information; checking the MRL index information on the basis of a case where the MPM flag information indicates that the MRL index information is checked; checking the planner flag information on the basis of a case where a value of the MRL index information is 0; deriving an intra prediction mode for a current block on the basis of the check for the planner flag information; deriving prediction samples for the current block on the basis of the intra prediction mode for the current block; and generating a reconstructed picture on the basis of the prediction samples.

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