Mid-depth Based Block Structure Determination for AV1

Jiawen Gu; Jiangtao Wen

ICASSP 2019accepted0 citations

Mid-depth Based Block Structure Determination for AV1

Abstract

AV1 is an emerging open-source and royalty-free video compression format as a successor to VP9.The increase in coding efficiency and complexity over VP9 is due to the time required to find the optimal partition structure among the more flexible encoding modes for the coding units (CUs) and prediction units (PUs). Due to differences in the frame structure, existing fast block structure determination algorithm cannot be directly applied to AV1. To tackle this problem, we proposed a novel mid-depth based fast block structure determination algorithm for AV1. It checks the partition from mid-depth to provide information for estimating the posterior probabilistic distribution of the partition decisions as well as fast pruning in the PU prediction. Experimental results show that the proposed method can save up to 29.06% time saving with only 0.95% BD-Rate increase.

BibTeX

@inproceedings{icassp2019_middepthbasedblo,
  title = {Mid-depth Based Block Structure Determination for AV1},
  author = {Jiawen Gu and Jiangtao Wen},
  booktitle = {ICASSP 2019},
  year = {2019}
}