Rate Control in Versatile Video Coding with Cosh Rate-Distortion Model

Dongzi WANG, Bin FANG*, Xuekai WEI*, Weizhi XIAN, Mingliang ZHOU, Qin MAO*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

Abstract

In this paper, we propose a rate control (RC) scheme for versatile video coding (VVC) to enhance coding performance. First, we propose a rate-distortion (R-D) model at the coding tree unit (CTU) level to describe the R-D relationship. Second, we adjust the quantization parameter (QP) and Lagrange multiplier at the coding unit (CU) level according to visual features to improve the rationality of local coding results. Finally, we propose a model parameter updating strategy to guarantee bitrate accuracy. The experimental results demonstrate that our RC method has better R-D performance with similar bitrate accuracy and better visual quality compared to the default RC strategy in VVC reference software VTM 10.2.

Original languageEnglish
Article number2350210
JournalJournal of Circuits, Systems and Computers
Volume32
Issue number12
Early online date23 Feb 2023
DOIs
Publication statusPublished - Aug 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 World Scientific Publishing Company.

Keywords

  • rate control
  • rate-distortion model
  • Video coding

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