Patent ID: 9020031
Filing Date: 2015-04-28
Classification: H04N

Abstract:
1. A method of decoding an intra prediction mode, comprising: reconstructing an intra prediction mode group indicator and a prediction mode index; constructing an MPM group including three intra prediction modes using valid intra prediction modes of left and top blocks of a current block; determining an intra prediction mode of the MPM group corresponding to the prediction mode index as the intra prediction mode of the current block when the intra prediction mode group indicator indicates that the intra prediction mode of the current block belongs to the MPM group; and determining the intra prediction mode of the current block using the prediction mode index and intra prediction modes of the MPM group when the intra prediction mode group indicator indicates that the intra prediction mode of the current block does not belong to the MPM group, wherein all non-directional mode numbers are lower than all directional mode numbers.