Method and apparatus for processing intra prediction mode

An apparatus for processing an intra prediction mode, comprising:

• a non-transitory memory having processor-executable instructions stored thereon;
• and
• a processor, coupled to the memory, configured to execute the processor-executable instructions to facilitate:
• determining whether an intra prediction mode of a first neighboring block of a current block is applicable to the current block and whether an intra prediction mode of a second neighboring block of the current block is applicable to the current block, wherein the first neighboring block is on a left side of the current block and the second neighboring block is on an upper side of the current block;
• and
• based on both the intra prediction mode of the first neighboring block being applicable to the current block and the intra prediction mode of the second neighboring block being applicable to the current block:
• determining whether the intra prediction mode of the first neighboring block is the same as the intra prediction mode of the second neighboring block;
• and
• setting mapped intra prediction modes of the current block based on whether or not the intra prediction mode of the first neighboring block is the same as the intra prediction mode of the second neighboring block;
• wherein:
• in case that the intra prediction mode of the first neighboring block is the same as the intra prediction mode of the second neighboring block, the intra prediction mode of the first neighboring block is set as a mapped intra prediction mode of the current block, and a different intra prediction mode is set as another mapped intra prediction mode of the current block;
• and
• in case that the intra prediction mode of the first neighboring block is not the same as the intra prediction mode of the second neighboring block, the intra prediction mode of the first neighboring block and the intra prediction mode of the second neighboring block are set as mapped intra prediction modes of the current block.

A non-transitory computer-readable medium having processor-executable instructions stored thereon for processing an intra prediction mode, wherein the processor-executable instructions, when executed, facilitate:

• determining whether an intra prediction mode of a first neighboring block of a current block is applicable to the current block and whether an intra prediction mode of a second neighboring block of the current block is applicable to the current block, wherein the first neighboring block is on a left side of the current block and the second neighboring block is on an upper side of the current block;
• and
• based on both the intra prediction mode of the first neighboring block being applicable to the current block and the intra prediction mode of the second neighboring block being applicable to the current block:
• determining whether the intra prediction mode of the first neighboring block is the same as the intra prediction mode of the second neighboring block;
• and
• setting mapped intra prediction modes of the current block based on whether or not the intra prediction mode of the first neighboring block is the same as the intra prediction mode of the second neighboring block;
• wherein:
• in case that the intra prediction mode of the first neighboring block is the same as the intra prediction mode of the second neighboring block, the intra prediction mode of the first neighboring block is set as a mapped intra prediction mode of the current block, and a different intra prediction mode is set as another mapped intra prediction mode of the current block;
• and
• in case that the intra prediction mode of the first neighboring block is not the same as the intra prediction mode of the second neighboring block, the intra prediction mode of the first neighboring block and the intra prediction mode of the second neighboring block are set as mapped intra prediction modes of the current block.