Patent ID: 9143786
Filing Date: 2015-09-22
Classification: H04N

Abstract:
1. A method of deriving an intra prediction mode of a current prediction unit, comprising: entropy-decoding a mode group indicator and a prediction mode index; constructing a Most Probable Mode (MPM) group including three intra prediction modes using a left intra prediction mode and an above intra prediction mode; determining whether the mode group indicator indicates the MPM group or not; if the mode group indicator indicates the MPM group, determining an intra prediction mode of the MPM group specified by the prediction mode index as the intra prediction mode of the current prediction unit; and if the mode group indicator does not indicate the MPM group, deriving the intra prediction mode of the current prediction unit using the prediction mode index and the three intra prediction modes of the MPM group, wherein deriving the intra prediction mode of the current prediction unit using the prediction mode index and the three intra prediction modes of the MPM group comprises ordered sub-steps of: