@inproceedings{b24bfafb7cfd4d4d8785ed5675c6dc38,
title = "Simplified Rate-Distortion Optimized Quantization for Transform Skip Mode in VVC Screen Content Coding",
abstract = "Rate-distortion optimized quantization for transform skip (RDOQ-TS) is shown to provide positive coding gain in VVC. This paper reduces encoding time-complexity of the RDOQ-TS scheme in VVC by adaptively skipping its level estimation (LE) process without sacrificing coding efficiency much. At first, the characteristics of each quantized level by RDOQ-TS are analyzed statistically. Subsequently, based on the statistical analysis, the LE process in the RDOQ-TS process is simplified by removing the case where the SQ (Scalar Quantization) value and the finally determined value are highly expected to be the same. For 4:2:0 screen content videos and 4:4:4 screen content videos, our proposed simplified rate-distortion optimization for transform skip reduces total encoding time respectively by 0.77\% and 1.83\% with no BDBR change under all intra configuration. In the case of the random access configuration, it achieves bit rate saving by -0.01 \% and -0.03 \% with total encoding time reduced 0.94\% and 0.52\% respectively.",
keywords = "Quantization, rate-distortion optimized quantization for transform skip (RDOQ-TS), VVC, Transform Skip",
author = "Jeeyoon Park and Jeehwan Lee and Byeungwoo Jeon",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; 2023 International Workshop on Advanced Imaging Technology, IWAIT 2023 ; Conference date: 09-01-2023 Through 11-01-2023",
year = "2023",
doi = "10.1117/12.2669348",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Masayuki Nakajima and Jae-Gon Kim and Kwang-deok Seo and Toshihiko Yamasaki and Jing-Ming Guo and Lau, \{Phooi Yee\} and Qian Kemao",
booktitle = "International Workshop on Advanced Imaging Technology, IWAIT 2023",
}