Method and apparatus for video coding using subblock coding order change and intra prediction according to same
AssigneesHyundai Motor Company, Kia Corporation, Kwangwoon University Industry-Academic Collaboration Foundation
InventorsJoo Hyung Byeon, Dong Gyu Sim, Min Hun Lee, Seung Wook Park, Jin Heo
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Abstract
A method and an apparatus are disclosed for video coding using subblock coding order change and resultant intra prediction. The video coding method and the apparatus efficiently provide reference samples and perform intra prediction on subblocks of a current block using the reference samples when a coding order of the subblocks is changed. The video coding method and the apparatus improve video coding efficiency and video quality when performing intra prediction on the subblocks.
Claims15
A method performed by a video decoding apparatus for decoding subblocks partitioned from a current block, the method comprising:
- decoding, from a bitstream, an intra-prediction mode of the current block, a partitioning mode of the subblocks, and a coding order flag, wherein the partitioning mode includes a Quadtree (QT) partitioning mode and a Vertical and Horizontal (VH) partitioning mode;
- partitioning the current block into the subblocks according to the partitioning mode;
- determining a coding order of the subblocks based on the coding order flag;
- and
- reconstructing the subblocks sequentially in the coding order by using the intra-prediction mode.
A method performed by a video encoding apparatus for encoding subblocks partitioned from a current block, the method comprising:
- determining an intra-prediction mode of the current block, a partitioning mode of the subblocks, and a coding order flag, wherein the partitioning mode includes a Quadtree (QT) partitioning mode and a Vertical and Horizontal (VH) partitioning mode;
- partitioning the current block into the subblocks according to the partitioning mode;
- determining a coding order of the subblocks based on the coding order flag;
- encoding the subblocks sequentially in the coding order by using the intra-prediction mode;
- and
- encoding the intra-prediction mode of the current block, the partitioning mode of the subblocks, and the coding order flag.
A computer-readable recording medium storing a bitstream generated by a video encoding method for encoding subblocks partitioned from a current block, the video encoding method comprising:
- determining an intra-prediction mode of the current block, a partitioning mode of the subblocks, and a coding order flag, wherein the partitioning mode includes a Quadtree (QT) partitioning mode and a Vertical and Horizontal (VH) partitioning mode;
- partitioning the current block into the subblocks according to the partitioning mode;
- determining a coding order of the subblocks based on the coding order flag;
- encoding the subblocks sequentially in the coding order by using the intra-prediction mode;
- and
- encoding the intra-prediction mode of the current block, the partitioning mode of the subblocks, and the coding order flag.
Dependencies are inferred from the claim text.