Simplified Triangular Partitioning Mode in Versatile Video Coding

Dohyeon PARK  Jinho LEE  Jung-Won KANG  Jae-Gon KIM  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E103-D   No.2   pp.472-475
Publication Date: 2020/02/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2019EDL8084
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
Keyword: 
Video Codec,  Versatile Video Coding,  inter prediction,  triangular partitioning mode,  

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Summary: 
The emerging Versatile Video Coding (VVC) standard currently adopts Triangular Partitioning Mode (TPM) to make more flexible inter prediction. Due to the motion search and motion storage for TPM, the complexity of the encoder and decoder is significantly increased. This letter proposes two simplifications of TPM for reducing the complexity of the current design. One simplification is to reduce the number of combinations of motion vectors for both partitions to be checked. The method gives 4% encoding time decrease with negligible BD-rate loss. Another one is to remove the reference picture remapping process in the motion vector storage of TPM. It reduces the complexity of the encoder and decoder without a BD-rate change for the random-access configuration.