Abstract:
Provided is a video stream decoding method including: obtaining a first identifier of at least one decoding target layer image from among a plurality of layer images from a bitstream including a plurality of pieces of layer encoding image data; obtaining a second identifier including information expressing a layer identifier outside of an expression range of the first identifier from the bitstream; determining a layer identifier based on the first and second identifiers; and reconstructing an image by decoding the decoding target layer image by using the determined layer identifier.
Abstract:
According to an embodiment, a video encoding method includes: determining whether it is possible to include an intra merge candidate in a merge candidate list; when it is possible to include the intra merge candidate in the merge candidate list, determining a merge candidate list including at least one of the intra merge candidate and an intra merge candidate of a current block; generating prediction samples of the current block by using a prediction candidate selected from the determined merge candidate list; and reconstructing the current block by using residual samples between the current blocks and the prediction samples of the current block.
Abstract:
Provided are methods and apparatuses for encoding and decoding video. The method of decoding video includes determining a type of an upper-layer data unit including a current coding unit in a hierarchical structure of a data unit; and obtaining, from a bitstream, intra-frame skip mode information of the current coding unit, according to the determined type of the upper-layer data unit, wherein, according to different types of the upper-layer data unit, the intra-frame skip mode information is expressed as code words having different lengths in the bitstream.
Abstract:
Provided is a multi-layer video decoding method. The multi-layer video decoding method includes determining a depth block corresponding to a current block; splitting the current block into two regions, based on sample values included in the determined depth block; and performing motion compensation by using the split two regions.
Abstract:
Provided are a video encoding apparatus, a video encoding method, a video decoding apparatus, and a video decoding method capable of filtering a boundary of partitions within a block.
Abstract:
Provided is a method of decoding a video including a multilayer. The method includes: setting, when a reference picture for inter-layer prediction is included in a reference picture list, first information to indicate that the reference picture is included in the reference picture list; and performing, when a disparity vector is not to be derived from a neighboring block of a current coding unit, residual prediction based on the first information and a default disparity vector.
Abstract:
Provided is a method of decoding a multi-view image, the method including obtaining, from a bitstream, an intra skip flag indicating whether a current block included in a depth image of the multi-view image is to be reconstructed based on an intra skip mode; obtaining, from the bitstream, intra skip prediction mode information indicating an intra prediction mode to be used for the current block, from among a plurality of intra prediction modes, when the intra skip flag indicates that the current block is to be reconstructed based on the intra skip mode; determining predicted values of samples included in the current block according to an intra prediction method indicated by the intra skip prediction mode information; and reconstructing the current block by determining reconstructed values of the samples, based on the predicted values of the samples.
Abstract:
According to an embodiment, an image decoding method includes: determining at least one prediction unit included in a current coding unit that is one of at least one coding unit splitting the image; generating a merge candidate list related to a current prediction unit included in the at least one prediction unit; determining a prediction mode to be performed in the prediction unit based on the merge candidate list; and performing prediction according to the determined prediction mode, wherein the generating of the merge candidate list further comprises determining whether to add a view synthesis prediction merging candidate to the merge candidate list based on whether a neighboring prediction unit adjacent to the current prediction unit has been encoded using the view synthesis prediction merging candidate.
Abstract:
A depth image decoding method according to an embodiment may include obtaining, from a bitstream, a first flag including information about use of an intra contour mode related to intra prediction of a depth image, determining whether to perform prediction in the intra contour mode on a prediction unit of the depth image, based on the first flag, performing prediction in the intra contour mode on the prediction unit upon determining to perform prediction in the intra contour mode on the prediction unit, and decoding the depth image based on a result of the performing of prediction.
Abstract:
Provided is an inter-layer video decoding method including obtaining, from a bitstream, depth refinement information indicating whether a disparity vector of a current block of a second layer is obtainable by using a depth image of a first layer; and if the depth refinement information indicates that the depth image of the first layer is available, determining the disparity vector of the current block of the second layer, wherein the disparity vector includes a predetermined second component value and a first component value that is determined by using a base disparity vector and the depth image of the first layer.