Image encoding/decoding method and device
AssigneeB1 Institute of Image Technology, Inc.
InventorKi Baek KIM
Life of this patent
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Abstract
An image prediction method according to the present invention may comprise: identifying a reference pixel region designated for obtaining correlation information; determining a reference pixel processing configuration on the basis of determination of the availability of the reference pixel region; and performing intra prediction according to the determined reference pixel processing. As described above, performing intra prediction on the basis of the availability of a reference pixel according to the present invention can improve encoding performance.
Claims10
An image decoding method performed by an image decoding apparatus, the method comprising:
- obtaining first information specifying whether a mode that predicts a current chroma block from a luma block corresponding to the current chroma block is enabled;
- determining a prediction mode of the current chroma block as the mode that predicts the current chroma block from the luma block corresponding to the current chroma block based on the first information;
- obtaining a first prediction sample for the current chroma block based on the determination;
- obtaining a second prediction sample for the current chroma block based on the determination;
- obtaining a final prediction sample for the current chroma block based on the first prediction sample and the second prediction sample,
- wherein the first prediction sample is predicted by using a DC mode, and
- wherein the second prediction sample is obtained based on the luma block corresponding to the current chroma block.
An image encoding method performed by an image encoding apparatus, the method comprising:
- determining whether a mode that predicts a current chroma block from a luma block corresponding to the current chroma block is enabled;
- determining a prediction mode of the current chroma block as the mode that predicts the current chroma block from the luma block corresponding to the current chroma block based on the determination of whether the mode is enabled;
- obtaining a first prediction sample for the current chroma block based on the determination;
- obtaining a second prediction sample for the current chroma block based on the determination;
- obtaining a final prediction sample for the current chroma block based on the first prediction sample and the second prediction sample;
- and
- encoding first information specifying whether the mode that predicts the current chroma block from the luma block corresponding to the current chroma block is enabled based on the determination of whether the mode is enabled,
- wherein the first prediction sample is predicted by using a DC mode, and
- wherein the second prediction sample is obtained based on the luma block corresponding to the current chroma block.
A method of transmitting a bitstream comprising:
- determining whether a mode that predicts a current chroma block from a luma block corresponding to the current chroma block is enabled;
- determining a prediction mode of the current chroma block as the mode that predicts the current chroma block from the luma block corresponding to the current chroma block based on the determination of whether the mode is enabled;
- obtaining a first prediction sample for the current chroma block based on the determination;
- obtaining a second prediction sample for the current chroma block based on the determination;
- obtaining a final prediction sample for the current chroma block based on the first prediction sample and the second prediction sample;
- encoding, into the bitstream, first information specifying whether the mode that predicts the current chroma block from the luma block corresponding to the current chroma block is enabled based on the determination of whether the mode is enabled;
- and
- transmitting the bitstream,
- wherein the first prediction sample is predicted by using a DC mode, and
- wherein the second prediction sample is obtained based on the luma block corresponding to the current chroma block.
Dependencies are inferred from the claim text.