Abstract:
Provided is an interlayer video decoding method. The interlayer video decoding method includes: obtaining brightness compensation information indicating whether a second layer current block performs brightness compensation; determining whether a candidate of the second layer current block is usable as a merge candidate based on whether the brightness compensation information indicates that the brightness compensation is performed and whether the candidate of the second layer current block performs time direction inter prediction; generating a merge candidate list including at least one merge candidate based on a result of the determining; and determining motion information of the second layer current block by using motion information of one of the at least one merge candidate.
Abstract:
Provided is a merge mode for determining, by using motion information of another block, motion information of pictures that construct a multiview video. A multiview video decoding method includes obtaining motion inheritance information specifying whether or not motion information of a corresponding block of a first layer which corresponds to a current block of a second layer is available as motion information of the second layer, obtaining a merge candidate list by selectively including the motion information of the corresponding block in merge candidates when the current block that was encoded according to the merge mode is decoded, determining a merge candidate included in the merge candidate list according to merge candidate index information, and obtaining motion information of the current block, based on the merge candidate.
Abstract:
Provided is a video decoding method including acquiring simplified depth coding (SDC) mode information indicating whether an SDC mode for encoding a residual block of a prediction unit included in a coding unit of a depth image by using one residual DC component is applied to the coding unit, acquiring the residual DC component corresponding to the prediction unit of the coding unit to which the SDC mode is applied based on the SDC mode information, and reconstructing a current block of the coding unit by using the residual DC component and a reference block of the prediction unit.
Abstract:
Provided are a scalable video decoding method and a scalable video decoding apparatus. The scalable video decoding method includes obtaining, from a bitstream, scalability mask information specifying whether scalable video decoding is performed according to each of scalability types in a current video, and when scalability mask information for scalable video decoding an auxiliary picture indicates performance, determining one of auxiliary picture types comprising an alpha plane and a depth picture of a primary picture of another layer, by using a scalability index indicating a type of the auxiliary picture to be decoded in a current layer, and decoding the auxiliary picture of the current layer.
Abstract:
An image encoding apparatus includes an annexed data obtainer configured to obtain annexed data that is annexed to image data and that is to be transmitted along with the image data; an annexed image data obtainer configured to convert the obtained annexed data and obtain annexed image data having a same format as that of the image data; and an encoder configured to obtain transmission image data based on the annexed image data and the image data and encode the transmission image data according to a first codec.
Abstract:
An inter-layer video decoding method according to an embodiment of the present invention may comprise the steps of: obtaining prediction mode information for a current block of a depth image from a bitstream; creating a prediction block of the current block on the basis of the obtained prediction mode information; predicting an average value for the prediction block by using the pixel values of a designated location of the prediction block; and decoding the depth image by using the average value for the prediction block.
Abstract:
A video encoding method, a video encoding apparatus, a video decoding method, and a video decoding apparatus are provided. The video encoding method includes reconstructing a first layer image based on encoding information of the first layer image that is obtained from a bitstream, splitting a largest coding unit of a second layer image into coding units based on split information of the second layer image that is obtained from the bitstream, splitting the coding units into prediction units for prediction encoding, determining whether to use a coding tool for decoding a current prediction unit based on at least one among a prediction mode of the current prediction unit among the prediction units, size information of the current prediction unit, and color depth information of the current prediction unit, and decoding the current prediction unit, using the coding tool, in response to the determining to use the coding tool.
Abstract:
An interlayer video decoding method according to an embodiment may include determining whether to perform brightness compensation with respect to a second layer current block to be reconstructed by using a first layer reference block; determining first layer reference pixels by using the closest integer pixels to reference location of a first layer corresponding to location of reference pixels for the second layer current block based on whether to perform the brightness compensation; and determining brightness compensation parameters regarding the second layer current block by using the determined first layer reference pixels and pixels surrounding the second layer current block.
Abstract:
Disclosed are methods for coding and decoding a multilayer video. The method for decoding a multilayer comprise: decoding a first layer picture and saving same to a decoded picture buffer (DPB); marking the first layer picture as a short-term reference picture; obtaining interlayer RPS information of a second layer picture which has a first POC identical to that of the first layer picture and which is interlayer-predicted by referencing the first layer picture; marking the first layer picture which has been marked as the short-term reference picture as a long-term reference picture, based on the interlayer RPS information; and performing interlayer prediction with respect to the second layer picture by referencing the first layer picture which has been marked as the long-term reference picture.
Abstract:
A method of decoding motion information according to an embodiment includes: obtaining information indicating a disparity distance for determining a prediction motion vector of a current block; scaling the disparity distance corresponding to the obtained information, based on a comparison result between a base pixel unit and a smallest pixel unit indicatable by a motion vector of the current block; determining a prediction motion vector candidate changed by the scaled disparity distance from a base motion vector of the current block from among one or more prediction motion vector candidates as the prediction motion vector of the current block; and determining the motion vector of the current block by using the prediction motion vector.