Patent ID: 9554149
Date: 2017-01-24
CPC Classifications: H04N

Claim:
1. An inter-layer prediction method comprising: receiving, by a decoding apparatus, prediction mode information and merge index information for a current block in a current layer through a bitstream; deriving, by the decoding apparatus, inter-layer motion information from a reference layer; determining, by the decoding apparatus, a prediction mode of the current block based on the prediction mode information; constructing, by the decoding apparatus, a merge candidate list for the current block, wherein the merge candidate list includes spatial merge candidates and an inter-layer candidate corresponding to the inter-layer motion information; selecting, by the decoding apparatus, the inter-layer candidate among the merge candidate list based on the merge index information; and predicting, by the decoding apparatus, the current block in the current layer using the inter-layer motion information, wherein the inter-layer motion information includes an inter-layer motion vector derived from the reference layer, and wherein the inter-layer motion vector is derived by scaling a motion vector of the reference layer on the basis of a resolution ratio of the reference layer and the current layer, wherein the inter-layer candidate is represented by an index value greater than index values of the spatial merge candidates among the merge candidate list.