Image encoding/decoding method and device, and recording medium in which bitstream is stored
AssigneeElectronics and Telecommunications Research Institute
InventorsJin Ho LEE, Jung Won KANG, Ha Hyun LEE, Sung Chang LIM, Hui Yong KIM
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Abstract
An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprise deriving an intra-prediction mode of a current block by using an intra-prediction mode of a neighbor block adjacent to the current block, configuring a reference sample of the current block, and performing intra-prediction on the current block by using the intra-prediction mode and the reference sample, wherein when the intra-prediction mode of the neighbor block is unavailable, the intra-prediction mode of the neighbor block may be replaced with a planar mode.
Claims20
A method of decoding an image, the method comprising:
- deriving an intra-prediction mode of a current block by using an intra-prediction mode of a neighbor block adjacent to the current block;
- configuring a reference sample of the current block;
- and
- performing intra-prediction on the current block by using the intra-prediction mode of the current block and the reference sample,
- wherein when the intra-prediction mode of the neighbor block is unavailable, the intra-prediction mode of the neighbor block is replaced with a planar mode.
A method of encoding an image, the method comprising:
- determining an intra-prediction mode of a current block;
- configuring a reference sample of the current block;
- performing intra-prediction on the current block by using the intra-prediction mode of the current block and the reference sample;
- and
- encoding the intra prediction mode of the current block by using an intra-prediction mode of a neighbor block adjacent to the current block,
- wherein when the intra-prediction mode of the neighbor block is unavailable, the intra-prediction mode of the neighbor block is replaced with a planar mode.
A non-transitory computer-readable recording medium storing a bitstream which is received, decoded and used to reconstruct an image by an image decoding apparatus, wherein the bitstream comprises information on prediction of a current block,
- The information on prediction of the current block is used to derive an intra-prediction mode of the current block by using an intra-prediction mode of a neighbor block adjacent to the current block, and used to configure a reference sample of the current block,
- the intra-prediction mode of the current block and the reference sample are used for performing intra-prediction on the current block, and
- wherein when the intra-prediction mode of the neighbor block is unavailable, the intra-prediction mode of the neighbor block is replaced with a planar mode.
Dependencies are inferred from the claim text.