Image coding method and device therefor
AssigneeLG Electronics Inc.
InventorsMoonmo KOO, Jie ZHAO, Seunghwan KIM, Jaehyun LIM
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Abstract
An image decoding method according to the present document comprises the steps of: receiving an intra-MIP syntax element for a first target block; deriving the value of the intra-MIP syntax element; setting a variable MIP flag for the preset specific area, which is the same as the area of the first target block, on the basis of the value of the intra-MIP syntax element; deriving an intra-prediction mode of the second target block on the basis of the variable MIP flag; and deriving a prediction sample of the second target block on the basis of the intra-prediction mode of the second target block.
Claims16
An image decoding method performed by a decoding apparatus, the method comprising:
- receiving image information comprising intra prediction type information from a bitstream, the intra prediction type information comprising an intra MIP syntax element for a first coding block, the intra MIP syntax element indicating whether matrix-based intra prediction is applied to the first coding block;
- decoding the intra MIP syntax element;
- setting MIP flag variables for the first coding block based on a value of the decoded intra MIP syntax element, the MIP flag variables corresponding to sample positions in the first coding block, respectively;
- deriving an intra prediction mode for a second coding block based on one of the MIP flag variables;
- deriving prediction samples for the second coding block based on the intra prediction mode for the second coding block;
- and
- generating a reconstructed block based on the prediction samples.
(canceled)
An image encoding method performed by an encoding apparatus, the method comprising:
- determining a value of an intra MIP syntax element for a first coding block;
- setting MIP flag variables for the first coding block based on the value of the intra MIP flag, the MIP flag variables corresponding to sample positions in the first coding block, respectively;
- determining an intra prediction mode for a second coding block based on one of the MIP flag variables;
- deriving residual samples for the second coding block based on prediction samples for the second coding block, the prediction samples being obtained based on the intra prediction mode for the second coding block;
- and
- encoding transform coefficient information generated based on the residual samples.
A method for transmitting data for image information comprising:
- determining a value of an intra MIP syntax element for a first coding block;
- setting MIP flag variables for the first coding block based on the value of the intra MIP flag, the MIP flag variables corresponding to sample positions in the first coding block, respectively;
- determining an intra prediction mode for a second coding block based on one of the MIP flag variables;
- deriving residual samples for the second coding block based on prediction samples for the second coding block, the prediction samples being obtained based on the intra prediction mode for the second coding block;
- encoding transform coefficient information generated based on the residual samples to generate a bitstream;
- and
- transmitting the data comprising the bitstream.
Dependencies are inferred from the claim text.