Patent ID: 9479783
Filing Date: 2016-10-25
CPC Classification: H04N

Claim Text:
1. An apparatus of decoding a video, comprising a processor configured to: determine candidate intra prediction modes including a planar mode, in response to an intra prediction mode of a left block being equal to an intra prediction mode of an upper block and the intra prediction mode to the left block being a DC mode, determine the candidate intra prediction modes including an intra prediction mode corresponding to an index that is less than an index to the intra prediction mode of the left block by 1 or an intra prediction mode corresponding to an index that is greater than the index of the intra prediction mode of the left block by 1, in response to the intra prediction mode of the left block being equal to the intra prediction mode of the upper block and the intra prediction mode of the left block being a directional mode, obtain, from a bitstream, a mode index indicating one among the candidate intra prediction modes, determine an intra prediction mode of a current block by using the mode index, and perform intra prediction on the current block using the intra prediction mode of the current block.