Method and apparatus for encoding and decoding based on intra prediction
AssigneeSamsung Electronics Co., Ltd.
InventorsWoo-jin HAN, Yu-mi Sohn
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Abstract
Methods and apparatuses for encoding and decoding based on intra prediction. The method of encoding an image based on intra prediction comprises dividing a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block, and performing intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub blocks.
Claims25
A method of encoding an image based on intra prediction, the method comprising:
- dividing a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block;
- and
- performing intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub blocks,
- wherein each of the unit blocks is a block which is a standard unit of the intra prediction.
An apparatus for encoding an image based on intra prediction, the apparatus comprising:
- an area divider which divides a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block;
- and
- an intra prediction performer which performs intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub blocks,
- wherein each of the unit blocks is a block which is a standard unit of the intra prediction.
A method of decoding an image based on intra prediction, the method comprising:
- receiving a bit stream comprising data about a current block which is intra prediction encoded after being divided into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of the unit blocks included in the current block, and determining an intra prediction mode of the current block;
- and
- intra prediction decoding the data about the current block in a unit of the sub blocks according to the determined intra prediction mode,
- wherein each of the unit blocks is a block which is a standard unit of the intra prediction.
An apparatus for decoding an image based on intra prediction, the apparatus comprising:
- an intra prediction mode determiner which receives a bit stream comprising data about a current block which is intra prediction encoded after being divided into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of the unit blocks included in the current block, and determines an intra prediction mode of the current block;
- and
- an intra prediction performer which intra prediction decodes the data about the current block in a unit of the sub blocks according to the determined intra prediction mode,
- wherein each of the unit blocks is a block which is a standard unit of the intra prediction.
Dependencies are inferred from the claim text.