Systems and methods for partitioning video blocks for video coding
A video coding device may be configured to perform video coding according to one or more of the techniques described herein. In one example, a method of partitioning video data for video coding, comprises receiving a video block including sample values, and partitioning the sample values according to the following set of partitioning modes: quadtree, horizontal or vertical symmetric binary tree, horizontal or vertical asymmetric binary tree, and horizontal or vertical triple tree.
1. A method of partitioning video data for video coding, the method comprising:
determining whether a partitioning for a video block is allowed depending on a block size, a minimum coding unit size, and a depth of a current coding unit, wherein the partitioning is performed based on at least one of a quadtree partitioning, a horizontal symmetric binary tree partitioning, a vertical symmetric binary tree partitioning, a horizontal triple tree partitioning, and a vertical triple tree partitioning;
determining whether a subsequent partitioning for a subsequent block is allowed based on a parent partition,
wherein, in a case that the subsequent block is a central node resulting from the vertical triple tree partitioning, a subsequent quadtree partitioning and a subsequent vertical symmetric binary tree partitioning are disallowed, and in a case that the subsequent block is a central node resulting from the horizontal triple tree partitioning, a subsequent quadtree partitioning and a subsequent horizontal symmetric binary tree partitioning are disallowed; and
signaling the allowed partitioning for the video block.
2. The method of claim 1 , wherein signaling the allowed partitioning for the video block includes not signaling a split flag, which indicates whether a node is split or not, when subsequent partitions are not allowed for the node.
3. A method of reconstructing video data, the method comprising:
decoding a split flag signaling corresponding to a partitioning, for a coded video block, performed based on at least one of a quadtree partitioning, a horizontal symmetric binary tree partitioning, a vertical symmetric binary tree partitioning, a horizontal triple tree partitioning, and a vertical triple tree partitioning;
determining whether the partitioning is allowed depending on a block size, a minimum coding unit size, and a depth of a current coding unit;
determining whether a subsequent partitioning for a subsequent block is allowed based on a parent partition,
wherein, in a case that the subsequent block is a central node resulting from the vertical triple tree partitioning, a subsequent quadtree partitioning and a subsequent vertical symmetric binary tree partitioning are disallowed, and in a case that the subsequent block is a central node resulting from the horizontal triple tree partitioning, a subsequent quadtree partitioning and a subsequent horizontal symmetric binary tree partitioning are disallowed; and
reconstructing video data based on the allowed partitioning for the coded video block.
4. The method of claim 3 , wherein:
the split flag indicates whether a node is split or not, and
the split flag is not decoded when subsequent partitions are not allowed for the node.
5. A device for reconstructing video data, the device comprising one or more processors configured to:
decode a split flag corresponding to a partitioning, for a coded video block, performed based on at least one of a quadtree partitioning quadtree partitioning, a horizontal symmetric binary tree partitioning, a vertical symmetric binary tree partitioning, a horizontal triple tree partitioning, and a vertical triple tree partitioning;
determine whether the partitioning for the coded video block is allowed depending on a block size, a minimum coding unit size, and a depth of a current coding unit;
determine whether a subsequent partitioning for a subsequent block is allowed based on a parent partition,
wherein, in a case that the subsequent block is a central node resulting from the vertical triple tree partitioning, a subsequent quadtree partitioning and a subsequent vertical symmetric binary tree partitioning are disallowed, and in a case that the subsequent block is a central node resulting from the horizontal triple tree partitioning, a subsequent quadtree partitioning and a subsequent horizontal symmetric binary tree partitioning are disallowed; and
reconstruct video data based on the allowed partitioning for the coded video block.
6. The device of claim 5 , wherein:
the split flag indicates whether a node is split or not, and
the split flag is not decoded when subsequent partitions are not allowed for the node.
7. The device of claim 5 , wherein the device includes a video decoder.