Abstract: A method of decoding video data by a device is provided. A merge subblock flag specifying whether subblock-based inter prediction parameters for a coding unit are inferred from neighbouring blocks is decoded. A motion vector difference merge flag is decoded if a value of the merge subblock flag is equal to zero and a value of a motion vector difference flag is equal to one. The motion vector difference merge flag specifies a prediction parameter with a motion vector difference is used, and the motion vector difference flag specifies whether a merge mode with motion vector difference is enabled.

Abstract: Disclosed is an image decoding method which includes obtaining, from a bitstream, information relating to the intra prediction type of a current block, information relating to the intra prediction mode of the current block, and residual information of the current block; performing intra prediction based on of the information relating to the intra prediction type and the information relating to the intra prediction mode; performing residual processing based on of the residual information; and reconstructing the current block based on of a result of the intra prediction and a result of the residual processing.

Abstract: A method is provided for decoding a sequence of pictures using a gradual refresh technique. In particular, all areas in one picture are gradually encoded or decoded over a plurality of pictures associated with the picture.

Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.

Abstract: A WP prediction and a GBI prediction are adaptively used in combination. A video decoding apparatus (31) includes: a weighted prediction unit (3094) configured to generate a prediction image by using at least one of a weight coefficient or an offset configured for a first unit region and a weight coefficient configured for a second unit region different from the first unit region, the weight coefficient and the offset each being applied to a pixel value included in one or a plurality of reference images.

Abstract: A method of intra prediction of a block in a picture of a video is provided. The method includes obtaining an intra prediction mode of the block; determining whether the intra prediction mode of the block is a wide-angle mode; filtering reference samples for the block based, at least in part, upon determining that the intra prediction mode of the block is the wide-angle mode; and generating predicted samples of the block based on filtered reference samples.

Abstract: An apparatus for decoding video data includes a decoder configured to decode, from a bitstream, a syntax element indicating an intra-prediction type of a current block of the video data, and an intra-predictor configured to generate a prediction block for the current block by selectively performing matrix based intra-prediction (MIP) or regular intra-prediction based on the intra-prediction type of the current block indicated by the syntax element.

Abstract: An method of decoding video data includes deriving, for a current block of video data and using decoder side intra mode derivation (DIMD), a list of intra modes using reconstructed samples of neighboring blocks; constructing, for the current block, a most probable mode (MPM) list, wherein constructing the MPM list comprises inserting, into the MPM list, at least one intra mode from the derived list of intra modes; and predicting, using a candidate selected from the constructed MPM list, the current block.

Abstract: A method for processing an immersive video includes: performing pruning for view images; generating an atlas by packing a patch that is extracted as a result of the pruning; deriving an offset for the patch that is comprised in the atlas; and correcting pixel values in the patch by using the derived offset.

Abstract: The present invention relates to a prediction-based technique for encoding light field data by removing redundant information of light field data, reducing a number of bits by employing a prediction of a pixel value in all four dimensions of the light field. Using this technique to represent light field data, allows it to be transferred through a limited-bandwidth medium and/or to significantly reduce the required storage capacity for this purpose.

Abstract: A method and apparatus for video coding comprising computer code configured to cause at least one processor to perform obtaining an input video stream, generating a coded video bitstream based on the input video stream using a neural network, the coded video bitstream including a plurality of supplemental enhancement information (SEI) messages and blocks, determining a plurality of pieces of neural network topology information associated with the neural network, and signaling the determined plurality of pieces of neural network topology information in a plurality of syntax elements associated with the coded video bitstream.

Abstract: A card-marking system is provided for personalizing plastic cards such as chip cards or identity cards by laser marking. A corresponding method for automated detection of an optimized setting includes a vision sub-system setting process for setting a vision sub-system of the card marking system and a subsequent marking sub-system setting process for setting a marking sub-system of the card-marking system. The card-marking system is designed to carry out the above method fully or semi-automatedly and to this end can include a corresponding computer program controlling the method.

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 may comprise determining a residual coding method of a current transform block corresponding to a current coding block, reconstructing residual information of the transform block based on the determined residual coding method and reconstructing the current transform block based on the residual information.

Abstract: Generating, by a processor in response to instructions stored on a non-transitory computer readable medium, a reconstructed frame, may include generating a reconstructed block of the reconstructed frame by decoding from an encoded bitstream. Decoding may include decoding a value from the encoded bitstream, identifying, in accordance with the value, a probability distribution for generating the reconstructed block, wherein the value indicates the probability distribution among a plurality of probability distributions determined independently of generating the reconstructed frame, entropy decoding an encoded prediction mode from the encoded bitstream using the probability distribution to identify a prediction mode for generating the reconstructed block, generating a prediction block in accordance with the prediction mode; combining the prediction block and a reconstructed residual block to obtain the reconstructed block, and including the reconstructed block in the reconstructed frame.

Abstract: A method of visual media processing includes determining whether to use an affine adaptive motion vector resolution (AMVR) technique on visual media data relying on a control information related to the affine AMVR technique in a bitstream representation of the visual media data, wherein the control information is included or excluded from the bitstream representation based on a rule; and performing a conversion between the visual media data and the bitstream representation of the visual media data.

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 determining whether bi-directional optical flow (BDOF) or prediction refinement with optical flow (PROF) applies to a current block, based on BDOF or PROF applying to the current block, fetching a prediction sample of the current block from a reference picture of the current block based on motion information of the current block, and deriving a refined prediction sample for the current block, by applying BDOF or PROF to the current block based on the fetched prediction sample.

Abstract: A method of coding implemented is provided. The method includes the following operations: obtained the height and width of a prediction block without applying clipping operation; calculating a value of a vertical component of an intra prediction sample based on the height and width of the prediction block; calculating a value of a horizontal component of the intra prediction sample based on the height and width of the prediction block; and generating the intra prediction sample based on the value of the vertical component and the value of the horizon component.

Abstract: A method of video processing is described. The method includes: making a first determination about whether a collocated video block of a video block of a video is coded using an inter coding mode or a non-inter coding mode; making a second determination, based on the first determination, about availability of motion vectors of the collocated video block or a mode of derivation of motion vectors for the collocated video block; and performing a conversion between the video block and a coded representation of the video based on the second determination.

Abstract: A decoding apparatus performs an image decoding method by receiving a bit stream including prediction information of a current block; deriving motion information of the current block on the basis of a merge candidate indicated by a candidate flag of the current block in a merge candidate list; deriving a MVD of the current block on the basis of MVD information of the current block and whether or not integer sample precision or fractional sample precision is used in the motion information; deriving modified motion information of the current block on the basis of the motion information and the MVD; and performing prediction of the current block on the basis of the modified motion information.

Abstract: The present disclosure provides a method and an apparatus for determining an intra-frame prediction mode of a current video block. The method includes determining, in an image area including a to-be-coded current video block, reference modes of the current video block based on a plurality of intra-frame prediction modes of a plurality of second video blocks, the image area being in an area defined by an adjacent coding unit (CU) and a father CU corresponding to the current video block in a video frame or slice including the current video block; determining an alternative prediction mode set from preset intra-frame prediction modes, the alternative prediction mode set comprising a plurality of alternative prediction modes, including the reference modes; and determining, in the alternative prediction mode set, a prediction mode having optimal intra-frame prediction coding performance on the current video block as an intra-frame prediction mode of the current video block.