Simplified Triangular Partitioning Mode in Versatile Video Coding

• Published in: IEICE Transactions on Information and Systems Vol. E103.D; no. 2; pp. 472 - 475
• Main Authors: KIM, Jae-Gon, KANG, Jung-Won, LEE, Jinho, PARK, Dohyeon
• Format: Journal Article
• Language: English
• Published: Tokyo The Institute of Electronics, Information and Communication Engineers 01.02.2020; Japan Science and Technology Agency
• Subjects: Coders; Coding; Complexity; inter prediction; Partitioning; triangular partitioning mode; Versatile Video Coding; Video Codec
• ISSN: 0916-8532; 1745-1361
• DOI: 10.1587/transinf.2019EDL8084

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.