JVET-D0117 Multi-Type-Tree [X. Li, H.-C. Chuang, J. Chen, M. Karczewicz, L. Zhang, X. Zhao, A. Said (Qualcomm)]

In this contribution, a multi-type-tree structure is proposed. In addition to quad-tree and binary-tree, triple-tree partitioning is employed to capture objects in the center of blocks. It is reported that 3.18% average luma BD-rate reduction is reportedly achieved over JEM-3.1 in the case of the random access configuration.

In case of triple tree, sizes are ¼, ½, ¼ such that the transform size is a power of 2.

Encoder runtime is increased by 2x.

Low delay results were not finished yet.

This contribution (as well as D0064) shows that there could be high potential for further improvements in compression performance by more flexible partitioning.

Further study was recommended, in particular regarding encoder run time.

Loop filters (8)

All contributions in this category were discussed Tue 0945-1045 (chaired by JRO and GJS).