METHOD OF GENERATING RECONSTRUCTED BLOCK

摘要

A method is provided for deriving an intra prediction mode for a current prediction unit. The method includes entropy decoding a mode group indicator and a prediction mode index, constructing a most probable mode (MPM) group using intra prediction modes of a left block and an above block, wherein the MPM group includes three intra prediction modes, determining whether the mode group indicator indicates the MPM group, determining an intra prediction mode specified by the prediction mode index among the three intra prediction modes in the MPM group as the intra prediction mode of the current prediction unit when the mode group indicator indicates the MPM group, and deriving the intra prediction mode of the current prediction unit using the prediction mode index and the three intra prediction modes in the MPM group when the mode group indicator does not indicate the MPM group.

主权项

1. A method of deriving an intra prediction mode for a current prediction unit, the method comprising:
entropy decoding a mode group indicator and a prediction mode index; constructing a most probable mode (MPM) group using intra prediction modes of a left block and an above block, wherein the MPM group includes three intra prediction modes; determining whether the mode group indicator indicates the MPM group; determining an intra prediction mode specified by the prediction mode index among the three intra prediction modes in the MPM group as the intra prediction mode of the current prediction unit when the mode group indicator indicates the MPM group; and deriving the intra prediction mode of the current prediction unit using the prediction mode index and the three intra prediction modes in the MPM group when the mode group indicator does not indicate the MPM group, wherein the MPM group includes two non-directional modes and vertical mode when only one of the intra prediction modes of the left and the above blocks is available and the available intra prediction mode is one of the two non-directional modes, and wherein, when only one of the intra prediction modes of the left and the above blocks is available and the available intra prediction mode is one of directional modes, the MPM group includes two non-directional modes and the available intra prediction mode.