A novel rate control scheme for panoramic video coding

作者：Liu, Yufan; Xu, Mai^*; Li, Chen; Li, Shengxi; Wang, Zulin

来源：2017 IEEE International Conference on Multimedia and Expo, ICME 2017, 2017-07-10 To 2017-07-14.

DOI：10.1109/ICME.2017.8019379

• Coding blocks
• Multi-views
• Optimization formulations
• Panoramic video
• Rate control scheme
• Rate controls
• Visual experiences
• Visual qualities

The popularity of multi-view panoramic videos has been considerably increased for producing Virtual Reality (VR) content, due to its immersive visual experience. We argue in this paper that PSNR is less effective in assessing visual quality of compressed panoramic videos than Sphere-based PSNR (S-PNSR), in which sphere-to-plain mapping of panoramic videos is considered. Thus, the conventional rate control (R-C) schemes of 2-Dimensional (2D) video coding, which optimize on PSNR, are not suitable for panoramic video coding. To optimize S-PSNR, we propose in this paper a novel RC scheme for panoramic video coding. Specifically, we develop an S-PSNR optimization formulation with constraint on bit-rate. Then, a solution is provided to the developed formulation, such that bits can be allocated to each coding block for achieving optimal S-PSNR in panoramic video coding. Finally, the experiment results validate the effectiveness of the proposed RC scheme in improving S-PSNR of panoramic video coding.

• 出版日期2017