METHOD FOR ENCODING VIDEO AND APPARATUS THEREFOR, AND METHOD FOR DECODING VIDEO AND APPARATUS THEREFOR USING EFFECTIVE PARAMETER DELIVERY

摘要

A method for decoding a multi-layer video according to one embodiment comprises steps of: acquiring an NAL unit from a bitstream of an encoded image; acquiring, from a parameter included in the NAL unit, layer information used in common for decoding encoded data of a base layer and an enhancement layer; and decoding the encoded data by means of the layer information to reconstruct the multi-layer image, wherein the parameter can be characterized by representing, in two or more bits, any one item of information from among: information regarding the profile, tier and level of the layers in the multi-layers; information regarding the form of phase alignment of luma sample grids between the layers of the multi-layers; information regarding the form of alignment of picture types between the layers of the multi-layers; and information characterizing a layer set to be decoded.