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.
Claims7
An image decoding method performed by an image decoding apparatus, the method comprising:
- obtaining first information specifying whether a cross component prediction is allowed;
- determining whether the cross component prediction is allowed for a current chroma block based on the first information;
- subsampling a luma block corresponding to the current chroma block in response to the determination that the cross component prediction is allowed for the current chroma block;
- deriving correlation information for the cross component prediction based on a predetermined reference region;
- and
- predicting the current chroma block by applying the correlation information to the subsampled luma block,
- wherein the reference region includes at least one of a neighboring region of the current chroma block or a neighboring region of the luma block.
An image encoding method performed by an image encoding apparatus, the method comprising:
- determining whether a cross component prediction is allowed;
- encoding first information specifying whether the cross component prediction is allowed based on the determination;
- subsampling a luma block corresponding to a current chroma block in response to the determination that the cross component prediction is allowed;
- deriving correlation information for the cross component prediction based on a predetermined reference region;
- and
- predicting the current chroma block by applying the correlation information to the subsampled luma block,
- wherein the reference region includes at least one of a neighboring region of the current chroma block or a neighboring region of the luma block.
A method of transmitting a bitstream comprising:
- determining whether a cross component prediction is allowed;
- encoding, into the bitstream, first information specifying whether the cross component prediction is allowed based on the determination;
- subsampling a luma block corresponding to a current chroma block in response to the determination that the cross component prediction is allowed;
- deriving correlation information for the cross component prediction based on a predetermined reference region;
- predicting the current chroma block by applying the correlation information to the subsampled luma block;
- and
- transmitting the bitstream,
- wherein the reference region includes at least one of a neighboring region of the current chroma block or a neighboring region of the luma block.
Dependencies are inferred from the claim text.