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US 12,764,287 B2Granted
Method and device for encoding/decoding image, and recording medium having stored bitstream
AssigneeIntellectual Discovery Co., Ltd.
InventorsSung Chang Lim, Jung Won Kang, Hyun Suk Ko, Jin Ho Lee, Ha Hyun Lee, Dong San Jun, Hui Yong Kim
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Abstract
The present invention relates to an image encoding/decoding method. The image decoding method includes splitting a coding tree unit (CTU) into at least one coding unit (CU) according to a block splitting structure and performing CU-based decoding, in which the block partition structure is configured such that at least one of binary tree splitting and ternary tree splitting is performed after quadtree splitting is performed.
Claims12
An image decoding method comprising:
- splitting a coding tree unit (CTU) into at least one coding unit (CU) according to a block splitting structure;
- and
- performing CU-based decoding,
- wherein the block splitting structure is configured such that at least one of binary tree splitting and ternary tree splitting is performed after quadtree splitting is performed,
- wherein the block splitting structure is configured such that:
- when a size of the coding unit is larger than 64, an implicit quadtree splitting is performed, and
- when the size of the coding unit is equal to or smaller than 64, an explicit quadtree splitting is performed based on division information signaled from a bitstream, and
- wherein the block splitting structure is configured such that when the coding unit crosses both a bottom boundary and a right boundary of a picture and the coding unit is larger than a minimum size of a quadtree leaf node, quadtree splitting is implicitly performed,
- wherein the CU-based decoding is performed based on a prediction mode of the coding unit, and
- wherein the prediction mode is determined based on a coding parameter obtained from the bitstream.
7 more elements
An image encoding method comprising:
- splitting a coding tree unit (CTU) into at least one coding unit (CU) according to a block splitting structure;
- and
- performing CU-based encoding,
- wherein the block splitting structure is configured such that at least one of binary tree splitting and ternary tree splitting is performed after quadtree splitting is performed,
- wherein the block splitting structure is configured such that:
- when a size of the coding unit is larger than 64, an implicit quadtree splitting is performed and division information for the implicit quadtree splitting is not encoded into a bitstream, and
- when the size of the coding unit is equal to or smaller than 64, an explicit quadtree splitting is performed and division information for the explicit quadtree splitting is encoded into the bitstream,
- wherein the block splitting structure is configured such that when the coding unit crosses both a bottom boundary and a right boundary of a picture and the coding unit is larger than a minimum size of a quadtree leaf node, quadtree splitting is implicitly performed,
- wherein the CU-based encoding is performed based on a prediction mode of the coding unit, and
- wherein a coding parameter indicating the prediction mode is encoded into the bitstream.
7 more elements
A method of transmitting a bitstream generated by an encoding method, the method comprising:
- splitting a coding tree unit (CTU) into at least one coding unit (CU) according to a block splitting structure;
- and
- performing CU-based encoding,
- wherein the block splitting structure is configured such that at least one of binary tree splitting and ternary tree splitting is performed after quadtree splitting is performed,
- wherein the block splitting structure is configured such that:
- when a size of the coding unit is larger than 64, an implicit quadtree splitting is performed and division information for the implicit quadtree splitting is not encoded into the bitstream, and
- when the size of the coding unit is equal to or smaller than 64, an explicit quadtree splitting is performed and division information for the explicit quadtree splitting is encoded into the bitstream,
- wherein the block splitting structure is configured such that when the coding unit crosses both a bottom boundary and a right boundary of a picture and the coding unit is larger than a minimum size of a quadtree leaf node, quadtree splitting is implicitly performed,
- wherein the CU-based encoding is performed based on a prediction mode of the coding unit, and
- wherein a coding parameter indicating the prediction mode is encoded into the bitstream.
7 more elements
Dependencies are inferred from the claim text.