Video encoding and decoding method and apparatus using selective subblock split information signaling
AssigneesHyundai Motor Company, Kia Corporation, Research & Business Foundation Sungkyunkwan University
InventorsByeung Woo Jeon, Jee Yoon Park, Bum Yoon Kim, Seung Wook Park
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Abstract
Disclosed is a video encoding/decoding method and an apparatus using selective transmission of subblock partitioning information. The video encoding/decoding method and apparatus selectively encode and decode the splitting direction of a subblock to reduce the overhead of signal transmission for using subblock partitioning while effectively performing intra prediction per subblock basis.
Claims13
An intra prediction method for applying an intra prediction mode of a current block to subblocks obtained by splitting the current block performed by a video decoding apparatus, the method comprising:
- decoding the size and an intra prediction mode of the current block;
- generating a pre-prunable range of the subblocks based on the size of the current block and the number of partitioned subblocks, wherein the pre-prunable range includes a vertical pre-prunable range and a horizontal pre-prunable range and represents a set of intra prediction directions in which constructed samples of newly reconstructed neighboring subblocks are not used by the subblocks when prediction is performed;
- and
- setting a splitting direction of the subblocks according to whether the intra prediction mode is included in the vertical pre-prunable range or the horizontal pre-prunable range.
An intra prediction method for applying an intra prediction mode of a current block to subblocks obtained by splitting the current block performed by a video encoding apparatus, the method comprising:
- obtaining the size and an intra prediction mode of the current block;
- generating a pre-prunable range of the subblocks based on the size of the current block, wherein the pre-prunable range includes a vertical pre-prunable range and a horizontal pre-prunable range and represents a set of intra prediction directions in which constructed samples of newly reconstructed neighboring subblocks are not used by the subblocks when prediction is performed;
- and
- setting a splitting direction of the sub blocks according to whether the intra prediction mode is included in the vertical pre-prunable range or the horizontal pre-prunable range.
A non-transitory computer-readable recording medium storing a bitstream generated by a video encoding method for applying an intra prediction mode of a current block to subblocks obtained by splitting the current block, wherein the method comprises:
- obtaining the size and an intra prediction mode of the current block;
- generating a pre-prunable range of the subblocks based on the size of the current block, wherein the pre-prunable range includes a vertical pre-prunable range and a horizontal pre-prunable range and represents a set of intra prediction directions in which constructed samples of newly reconstructed neighboring subblocks are not used by the subblocks when prediction is performed;
- and
- setting a splitting direction of the subblocks according to whether the intra prediction mode is included in the vertical pre-prunable range or the horizontal pre-prunable range.
Dependencies are inferred from the claim text.