Abstract:
A method and apparatus for generating a 3K-resolution display image for a mobile terminal screen are disclosed. The method includes: receiving an input image; selecting a 3K resolution as a resolution of an image to be reproduced on the mobile terminal screen of a predetermined size, based on human cognitive characteristics and resolution analytical ability with respect to the mobile terminal screen; and generating a display image having the selected 3K resolution by using the input image.
Abstract:
Provided are methods and apparatuses for encoding and decoding an image. The method of encoding includes: determining a maximum size of a buffer to decode each image frame by a decoder, a number of image frames to be reordered, and latency information of an image frame having a largest difference between an encoding order and a display order from among image frames that form an image sequence, based on an encoding order the image frames that form the image sequence, an encoding order of reference frames referred to by the image frames, a display order of the image frames, and a display order of the reference frames; and adding, to a mandatory sequence parameter set, a first syntax indicating the maximum size of the buffer, a second syntax indicating the number of image frames to be reordered, and a third syntax indicating the latency information.
Abstract:
Provided are a method and device for encoding or decoding an image by using a block map. In the method and device for decoding an image according to an embodiment set forth herein, a bitstream of an encoded image is received, one or more blocks in a picture are determined using split information obtained from the bitstream, a block map indicating whether or not a previous block among the one or more blocks has been decoded is determined, a neighboring region which is available to be referred to for a current block to be decoded in a certain scan order among the one or more blocks is determined, and the current block is decoded based on the neighboring region which is available to be referred to.
Abstract:
Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
Abstract:
Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
Abstract:
Provided is a video decoding method including obtaining split information indicating whether to split a current block; when the split information indicates that the current block is split, splitting the current block into at least two lower blocks; obtaining encoding order information indicating an encoding order of the at least two lower blocks of the current block; determining a decoding order of the at least two lower blocks according to the encoding order information; and decoding the at least two lower blocks according to the decoding order.
Abstract:
Provided is a video decoding method including obtaining split information indicating whether to split a current block; when the split information indicates that the current block is split, splitting the current block into at least two lower blocks; obtaining encoding order information indicating an encoding order of the at least two lower blocks of the current block; determining a decoding order of the at least two lower blocks according to the encoding order information; and decoding the at least two lower blocks according to the decoding order.
Abstract:
Provided is a method of decoding an image, the method including: determining at least one coding unit for splitting an image, based on block shape information of a current coding unit; determining at least one transformation unit, based on a shape of the current coding unit included in the at least one coding unit; and decoding the image by performing inverse transformation based on the at least one transformation unit, wherein the block shape information indicates whether the current coding unit is a square shape or a non-square shape. Also, provided is an encoding method corresponding to the decoding method. In addition, provided is an encoding apparatus or decoding apparatus capable of performing the encoding or decoding method.
Abstract:
Provided is a multilayer video decoding method including obtaining a multilayer video bitstream; determining, based on the obtained multilayer video bitstream, whether or not a default reference type, in which at least one layer is inter-layer predicted by using at least one reference layer by default, is used; and inter-layer predicting the at least one layer by using the at least one reference layer according to the default reference type, based on the determining of whether or not the default reference type is used, and decoding an image including the at least one layer.
Abstract:
Provided is a video decoding method including obtaining, from a bitstream, information about a prediction mode of a current block; when the prediction mode of the current block is an intra mode, obtaining information about an intra prediction mode of the current block; obtaining a predicted sample value of the current block by using at least one sample that is from among samples included in an adjacent reference region of a plurality of lines and is located, from the current block, in an intra prediction direction indicated by an intra prediction mode. The adjacent reference region of the plurality of lines may include a plurality of lines that are in a vertical direction and located at a left side of the current block, or a plurality of lines that are in a horizontal direction and located at an upper side of the current block.