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A Viewport-Adaptive Rate Control Approach for Omnidirectional Video Coding

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Citation Author(s):
Yichen Guo,Mai Xu,Yang Li,Rui Ding
Submitted by:
Yichen Guo
Last updated:
28 February 2021 - 10:22pm
Document Type:
Presentation Slides
Document Year:
Event:

Abstract 

Abstract: 

For omnidirectional videos (ODVs), the existing o -line coding approaches are designed based on the spatial or perceptual distortion in a whole ODV frame, ignoring the fact that subjects can only access viewports. To improve the subjective quality inside the viewports, this paper proposes an o -line viewport-adaptive rate control (RC) approach for ODVs in high eciency video coding (HEVC) framework. Speci cally, we predict the viewport candidates with importance weights and develop a viewport saliency detection model. Then, the predicted candidates and detected saliency are taken into account in our viewport-adaptive CTU traversal and bit allocation scheme. Finally, the experimental results validate that our approach is effective in saving bit-rates and improving subjective quality for encoding ODVs; meanwhile, our approach is also effective in the auxiliary task of saliency detection in viewports.

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Comments

Finally, the experimental results validate that our approach is effective in saving bit-rates and improving subjective quality for encoding ODVs; meanwhile, our approach is also e ective in the auxiliary task of saliency detection in viewports.

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DCC21.pptx

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