IPIU 2018 (제30회 영상처리 및 이해에 관한 워크샵)
Current Result Document :
| 한글제목(Korean Title) |
Methods of Padding Inactive Regions for Sphere Segmented Projection (SSP) for 360 Video |
| 영문제목(English Title) |
Methods of Padding Inactive Regions for Sphere Segmented Projection (SSP) for 360 Video |
| 저자(Author) |
Yong-Uk Yoon
Do-Hyeon Park
Hyun-ho Kim
Jae-Gon Kim
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| 원문수록처(Citation) |
VOL 30 NO. 01 PP. P2 ~ 0034 (2018. 02) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
In recent years, 360 videos have been attracting increasing attention as a new type of media that provides immersive experiences. In JVET which is the exploring next generation of video coding standard with capability beyond HEVC, 360 videos are included in the scope of standard along with SDR (standard dynamic range) and HDR (high dynamic range) video. In the workflow of 360 video coding of JVET, firstly the 360 videos are projected onto the 2D plane with diverse projection formats, such as equirectangular projection (ERP), cubemap projection (CMP), segmented sphere projection (SSP), rotated sphere projection (RSP), etc. Some projection formats have inactive regions in the converted 2D plane such as SSP. The inactive regions may cause visual artifact as well as the reduction of the coding efficiency due to discontinuity at boundaries between pole segments and inactive regions in SSP. In this paper, to address these problems, the inactive regions are padded by using two types of adjacent pixels: rectangular-face boundaries and circle-face boundaries. The experimental results demonstrate that, in terms of end-to-end WS-PSNR-NN, the proposed method achieves 0.3% BD-rate reduction when using the average value of circle-face boundary pixels. In addition, the visual artifacts along the borders between discontinuous faces are noticeably reduced.
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