Video decoding method and apparatus using the same

摘要

A video decoding method according to an embodiment of the present invention may include determining a type of a filter to be applied to a first-layer picture which a second-layer picture as a decoding target refers to; determining a filtering target of the first-layer picture to which the filter is applied; filtering the filtering target based on the type of the filter; and adding the filtered first-layer picture to a second-layer reference picture list. Accordingly, the video decoding method and an apparatus using the same may reduce a prediction error in an upper layer and enhance encoding efficiency.

主权项

1. A video decoding method supporting a plurality of layers, the video decoding method comprising:
determining a type of a filter to be applied to a first-layer picture which a second-layer picture as a decoding target refers to; determining a filtering target of the first-layer picture to which the filter is applied; filtering the filtering target based on the type of the filter; and adding the filtered first-layer picture to a second-layer reference picture list, wherein the determining of the type of the filter determines to adaptively select and apply one or more filters to the first-layer picture, and wherein the determining of the type of the filter comprises determining to apply a default filter having a preset filter coefficient set to the first-layer picture and determining whether to apply an alternative filter different from the default filter to a sample at an integer position in the first-layer picture, and the determining whether to apply the alternative filter receives and decodes a flag signal indicating whether to apply the alternative filter.