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.
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 language | English |
|---|---|
| Pages (from-to) | 2303-2307 |
| Number of pages | 5 |
| Journal | IEEE Signal Processing Letters |
| Volume | 29 |
| Early online date | 4 Nov 2022 |
| DOIs | |
| Publication status | Published - 4 Nov 2022 |
Keywords
- Versatile Video Coding
- Rate Control
- Saliency Feature
- Partitioning Algorithm