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US 9,432,675 B2Granted
Method and apparatus for encoding/decoding intra prediction mode
AssigneeElectronics and Telecommunications Research Institute
InventorsJin Ho Lee, Hui Yong Kim, Sung Chang Lim, Jin Soo Choi, Jin Woong Kim
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Abstract
An image decoding method, according to the present invention, includes the steps of: deriving an MPM candidate mode from neighboring blocks adjacent to a target block to be decoded; generating an MPM list using the MPM candidate mode derived from the neighboring blocks; and deriving an intra prediction mode for the target block to be decoded using the generated MPM list. According to the present invention, image compression efficiency can be improved.
Claims4
A video decoding method with a decoding apparatus, comprising:
- obtaining, with the decoding apparatus, a first Most Probably Mode (MPM) candidate mode from at least one neighboring block adjacent to a current block of a video frame to be decoded;
- generating, with the decoding apparatus, a MPM list based on the first MPM candidate mode, a number of MPM candidate modes to be included in the MPM list being a fixed number;
- deriving, with the decoding apparatus, an intra prediction mode of the current block from the generated MPM list;
- and performing, with the decoding apparatus, intra prediction of the current block based on the derived intra prediction mode, wherein the MPM list includes a second MPM candidate mode, the second MPM candidate mode being representative of a directional prediction mode, the directional prediction mode corresponding to a value resulting from either adding one to a value of the first MPM candidate mode or subtracting one from the value of the first MPM candidate mode.
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