| CPC H04N 19/11 (2014.11) [H04N 19/105 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] | 17 Claims |
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1. A method for encoding a video bitstream for a block with an intra prediction mode into a coded video bitstream, the method comprising:
receiving, by a device comprising a memory storing instructions and a processor in communication with the memory, the video bitstream for the block;
dividing, by the device, a list of intra modes into a plurality of intra mode sets for the block based on intra prediction modes of at least one neighboring block of the block, the list of intra modes consisting of 61 intra prediction modes;
determining, by the device according to the video bitstream, a set index indicating an intra mode set from the plurality of intra mode sets;
determining, by the device according to the video bitstream, a mode index indicating an intra prediction mode from the intra mode set; and
encoding, by the device, the set index and the mode index for the intra prediction mode into the coded video bitstream,
wherein the plurality of intra mode sets comprise:
at least a first intra mode set, a second intra mode set, and a third intra mode set, wherein a number of intra prediction modes of each of the first intra mode set, the second intra mode set, and the third intra mode set is 16; and
at least a fourth intra mode set.
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