λ-Domain VVC Rate Control Based on Nash Equilibrium

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Jielian Lin
  • Aiping Huang
  • Tiesong Zhao
  • Xu Wang
  • Sam Kwong

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)3477-3487
Journal / PublicationIEEE Transactions on Circuits and Systems for Video Technology
Volume33
Issue number7
Online published21 Dec 2022
Publication statusPublished - Jul 2023

Abstract

With a significant Rate-Distortion (RD) improvement than H.265/HEVC, Versatile Video Coding (VVC) has set a new milestone in lossy video compression. It also incorporates the emerging λ-domain rate control technique, aiming at a higher visual quality under a fixed bit constraint. However, the challenge remains how to efficiently allocate bits to all frames and Coding Tree Units (CTUs). In this paper, we propose an effective solution by formulating the above task as a Nash equilibrium problem, where all CTUs are treated as players that bargains with each other. By introducing λ-domain RD models, a constrained optimization is derived with no closed-form solution. We then propose a two-step strategy to address this issue: a Newton method to iteratively calculate an intermediate variable, and a final solution of Nash equilibrium to obtain an approximately optimal λ. Finally, we utilize the derived λ to perform an effective CTU-level bit allocation, which is the very first attempt to introduce Nash equilibrium in λ-domain rate control. Experimental results with Common Test Conditions (CTC) demonstrate the effectiveness and superiority of our method, which outperforms the state-of-the-art CTU-level rate allocation algorithms for VVC.

© 2022 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.

Research Area(s)

  • rate control, video coding, VVC, λ-domain RD model

Citation Format(s)

λ-Domain VVC Rate Control Based on Nash Equilibrium. / Lin, Jielian; Huang, Aiping; Zhao, Tiesong et al.
In: IEEE Transactions on Circuits and Systems for Video Technology, Vol. 33, No. 7, 07.2023, p. 3477-3487.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review