公开(公告)号：US11546583B2

公开(公告)日：2023-01-03

申请号：US17703749

申请日：2022-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon Jang

IPC: H04N19/109 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise determining prediction mode characteristic information based on a color format of a current block, determining a prediction mode type of a lower-layer block split from the current block based on the prediction mode characteristic information, obtaining the lower-layer block by splitting the current block based on the prediction mode type of the lower-layer block, and decoding the lower-layer block based on the prediction mode type of the lower-layer block. The prediction mode type of the lower-layer block comprises a first prediction mode type specifying that both an intra prediction mode and an inter prediction mode are available, a second prediction mode type specifying that only the intra prediction mode is available and a third prediction mode type specifying that only the inter prediction mode is available. Based on a first condition for the current block being satisfied, the prediction mode characteristic information has a first value, and the first condition comprises a case where a color format of the current block is a monochrome format or a 4:4:4 format. Based on the first condition for the current block being not satisfied, the prediction mode characteristic information has a second value or a third value based on at least one of a color format, split mode or size of the current block.

公开(公告)号：US11516475B2

公开(公告)日：2022-11-29

申请号：US17696619

申请日：2022-03-16

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/513 ,  H04N19/105 ,  H04N19/137

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a prediction sample of a current block based on motion information of the current block, deriving a reference picture resampling (RPR) condition for the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block based on the RPR condition, and deriving a refined prediction sample for the current block by applying PROF to the current block.

公开(公告)号：US20220201285A1

公开(公告)日：2022-06-23

申请号：US17579288

申请日：2022-01-19

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon Jang

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/174

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining whether to parse first information specifying whether a skip mode applies to a current block, determining whether to parse second information specifying whether an IBC (Intra Block Copy) mode applies to the current block, determining whether the IBC mode applies to the current block based on the first information and the second information, and deriving a prediction block of the current block based on whether to apply the IBC mode. Whether to parse the first information may be determined based on at least one of a width or height of the current block.

公开(公告)号：US20220174274A1

公开(公告)日：2022-06-02

申请号：US17581432

申请日：2022-01-21

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon Jang

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/119 ,  H04N19/169 ,  H04N19/186 ,  H04N19/136

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise determining a current block by splitting an image, identifying whether a palette mode is applied for the current block based on a palette mode flag obtained from a bitstream, obtaining palette mode encoding information of the current block from the bitstream based on a tree type of the current block and whether the palette mode is applied for the current block, and obtaining chroma component prediction information of the current block from the bitstream based on the palette mode being not applied for the current block.