Omnidirectional video coding using latitude adaptive down-sampling and pixel rearrangement

Projection of omnidirectional videos in the spherical domain onto the planar domain is required to utilise existing video compression techniques. Due to its simplicity, the equirectangular projection (ERP) method has been widely adopted for sphere-to-plane mapping. However, the coding efficiency of...

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Bibliographic Details
Published in:Electronics letters 2017-05, Vol.53 (10), p.655-657
Main Authors: Lee, S.-H, Kim, S.-T, Yip, E, Choi, B.-D, Song, J, Ko, S.-J
Format: Article
Language:English
Subjects:
bitrate reduction
data compression
data compression scheme
equirectangular projection method
ERP method
Image and vision processing and display technology
latitude adaptive down‐sampling
omnidirectional video coding
pixel rearrangement
planar domain
sphere‐to‐plane mapping
spherical domain
video coding
video compression techniques
visual redundancies
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Summary:Projection of omnidirectional videos in the spherical domain onto the planar domain is required to utilise existing video compression techniques. Due to its simplicity, the equirectangular projection (ERP) method has been widely adopted for sphere-to-plane mapping. However, the coding efficiency of the ERP method is inefficient because the ERP video includes visual redundancies in the high latitude areas of the sphere. To solve this problem, this Letter presents an efficient data compression scheme that employs latitude adaptive down-sampling followed by pixel rearrangement. Experimental results show that the proposed method can achieve a bitrate reduction of up to 28.9%, as compared with the ERP.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2017.0035