An Optimized Rate Control Algorithm in Versatile Video Coding for 360° Videos

Zeming Zhao, Xiaohai He*, Shuhua Xiong, Liqiang He, Raymond Sheriff

*Corresponding author for this work

Research output: Contribution to journalArticle (journal)peer-review

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Abstract

Today, 360° video has become an integral part of people’s lives. Despite the fact that the latest generation standard Versatile Video Coding (VVC) demonstrates a significant gain in encoding capacity over High Efficiency Video Coding (HEVC), it still has room for 360° video encoding improvements. To further enhance the applicability of 360° video coding, an optimized rate control (RC) algorithm in VVC for 360° video is proposed in this paper. We present an efficient extraction algorithm for obtaining the video’s saliency feature. Furthermore, for the characteristics of 360° video, a partitioning algorithm is also proposed to divide
a frame into demand and non-demand regions. Additionally, to achieve precise and rational RC, a Coding Tree Unit (CTU)-level bit allocation strategy is proposed based on the saliency feature for the above-mentioned regions. The experimental results show that the proposed RC algorithm can achieve 11.77 % bitrate savings and more accurate allocation compared with the default algorithm of VVC. Also, performance enhancement has been observed in comparison to the most advanced algorithm.
Original languageEnglish
Pages (from-to)2303-2307
Number of pages5
JournalIEEE Signal Processing Letters
Volume29
Early online date4 Nov 2022
DOIs
Publication statusPublished - 4 Nov 2022

Keywords

  • Versatile Video Coding
  • Rate Control
  • Saliency Feature
  • Partitioning Algorithm

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