Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise acquiring transform coefficients distribution information of a neighboring block from a bitstream; direction-adaptively determining an intra prediction mode of a current block to be decoded, according to the transform coefficients distribution information of the neighboring block; and reconstructing the current block, based on the determined intra prediction mode, wherein the direction-adaptively determining includes determining similarity flag information corresponding to the neighboring block, based on the transform coefficients distribution information of the neighboring block.

Abstract: Disclosed is a method of decoding an image and a method of encoding an image. The method of decoding an image includes: obtaining motion-constrained tile set information; determining, on the basis of the motion-constrained tile set information, a first boundary region of a collocated tile set within a reference picture, which corresponds to a motion-constrained tile set; padding a second boundary region corresponding to the first boundary region; and performing inter prediction on the motion-constrained tile set by using a collocated tile set that includes the padded second boundary region.

Abstract: An image decoding method according to an embodiment of the present invention comprises the steps of: acquiring encoding tree unit information from an image stream; acquiring signaling information on a maximum coding unit size of a coding unit divided from the encoding tree unit; and dividing the encoding tree unit by steps according to the signaling information.

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise acquiring transform coefficients distribution information of a neighboring block from a bitstream; direction-adaptively determining an intra prediction mode of a current block to be decoded, according to the transform coefficients distribution information of the neighboring block; and reconstructing the current block, based on the determined intra prediction mode, wherein the direction-adaptively determining includes determining similarity flag information corresponding to the neighboring block, based on the transform coefficients distribution information of the neighboring block.

Abstract: An image encoding/decoding method is provided. An image decoding method of the present invention may comprise deriving an intra-prediction mode of a current luma block, deriving an intra-prediction mode of a current chroma block based on the intra-prediction mode of the current luma block, generating a prediction block of the current chroma block based on the intra-prediction mode of the current chroma block, and the deriving of an intra-prediction mode of a current chroma block may comprise determining whether or not CCLM (Cross-Component Linear Mode) can be performed for the current chroma block.

Abstract: An image decoding method comprises the steps of: obtaining a current coding tree unit (CTU) of a first size configuring a current picture; determining whether to implicitly divide the current coding tree unit; dividing the current coding tree unit into one or more coding units (CUs) based on the determination; obtaining, from a bitstream, division information for a current coding unit among the one or more coding units; and dividing and decoding the current coding unit..

Abstract: An image encoding/decoding method and apparatus are disclosed. The method of decoding an image according to the present invention, comprises, obtaining a single stream including subpicture information of a plurality of subpictures; selecting a subpicture to be extracted from among the plurality of subpictures; determining the single stream as a stream to be extracted and obtaining a sub stream for the subpicture to be extracted from the stream to be extracted, by removing or using at least one piece of subpicture information included in the stream to be extracted.

Abstract: An image decoding method is disclosed in the present specification. A method of decoding an image, the method may comprises determining whether to perform a context update for a first syntax element of a current block, updating, on the basis of the determination, a context for entropy decoding of the first syntax element and generating, on the basis of the updated context, a bin for the first syntax element, and wherein whether to perform the context update is determined on the basis of the number of pre-decoded predetermined syntax elements for the current block.

Abstract: An image decoding is performed by steps including: determining whether or not to perform filtering on a boundary of a current block; determining a filtering strength on the boundary of the current block, and a number of samples used in filtering; and performing filtering on the boundary of the current block on the basis of the filtering strength and the number of samples used in filtering, where the number of samples used in filtering is determined on the basis of a size of the current block.

Abstract: An image decoding method is disclosed in the present specification. A method of decoding an image, the method may comprises determining whether to perform a context update for a first syntax element of a current block, updating, on the basis of the determination, a context for entropy decoding of the first syntax element and generating, on the basis of the updated context, a bin for the first syntax element, and wherein whether to perform the context update is determined on the basis of the number of pre-decoded predetermined syntax elements for the current block.

Abstract: Disclosed herein is a method of decoding an image. The method includes generating an inter prediction block by performing inter prediction with respect to a current block, generating an intra prediction block by performing intra prediction with respect to the current block, determining a first weight and a second weight, and generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block. The generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode.

Abstract: An image decoding is performed by steps including: determining whether or not to perform filtering on a boundary of a current block; determining a filtering strength on the boundary of the current block, and a number of samples used in filtering; and performing filtering on the boundary of the current block on the basis of the filtering strength and the number of samples used in filtering, where the number of samples used in filtering is determined on the basis of a size of the current block.

Abstract: Disclosed herein is a method of encoding/decoding an image. The image decoding method includes decoding information on a quantization matrix from a bitstream, acquiring a quantization matrix of a current block based on the information on the quantization matrix, and dequantizing the current block using the quantization matrix of the current block. The acquiring of the quantization matrix of the current block includes deriving a single identifier using at least one of a size of the current block, a prediction mode or a color component, and acquiring the quantization matrix of the current block based on the single identifier.

Abstract: An image encoding/decoding method is provided. An image decoding method of the present invention may comprise deriving an intra-prediction mode of a current luma block, deriving an intra-prediction mode of a current chroma block based on the intra-prediction mode of the current luma block, generating a prediction block of the current chroma block based on the intra-prediction mode of the current chroma block, and the deriving of an intra-prediction mode of a current chroma block may comprise determining whether or not CCLM (Cross-Component Linear Mode) can be performed for the current chroma block.

Abstract: Disclosed is a method of decoding an image and a method of encoding an image. The method of decoding an image includes: obtaining motion-constrained tile set information; determining, on the basis of the motion-constrained tile set information, a first boundary region of a collocated tile set within a reference picture, which corresponds to a motion-constrained tile set; padding a second boundary region corresponding to the first boundary region; and performing inter prediction on the motion-constrained tile set by using a collocated tile set that includes the padded second boundary region.

Abstract: There is provided an image encoding/decoding method and apparatus. The image decoding method comprises decoding information on whether or not to perform motion information refinement from a bitstream, obtaining second motion information for first motion information on a current block on the basis of the information and reconstructing at least one of the current block and a neighboring block of the current block by using at least one of the first motion information and the second motion information.

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise acquiring transform coefficients distribution information of a neighboring block from a bitstream; direction-adaptively determining an intra prediction mode of a current block to be decoded, according to the transform coefficients distribution information of the neighboring block; and reconstructing the current block, based on the determined intra prediction mode, wherein the direction-adaptively determining includes determining similarity flag information corresponding to the neighboring block, based on the transform coefficients distribution information of the neighboring block.

Abstract: Disclosed herein is a method of decoding an image. The method includes generating an inter prediction block by performing inter prediction with respect to a current block, generating an intra prediction block by performing intra prediction with respect to the current block, determining a first weight and a second weight, and generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block. The generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode.

Abstract: Disclosed is a method of decoding an image and a method of encoding an image. The method of decoding an image includes: obtaining motion-constrained tile set information; determining, on the basis of the motion-constrained tile set information, a first boundary region of a collocated tile set within a reference picture, which corresponds to a motion-constrained tile set; padding a second boundary region corresponding to the first boundary region; and performing inter prediction on the motion-constrained tile set by using a collocated tile set that includes the padded second boundary region.

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise acquiring transform coefficients distribution information of a neighboring block from a bitstream; direction-adaptively determining an intra prediction mode of a current block to be decoded, according to the transform coefficients distribution information of the neighboring block; and reconstructing the current block, based on the determined intra prediction mode, wherein the direction-adaptively determining includes determining similarity flag information corresponding to the neighboring block, based on the transform coefficients distribution information of the neighboring block.