Random-access-aware Light Field Video Coding using Tree Pruning Method

The increasing prevalence of VR/AR as well as the expected availability of Light Field (LF) display soon call for more practical methods to transmit LF image/video for services. In that aspect, the LF video coding should not only consider the compression efficiency but also the view random-access ca...

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Published in:Visual communications and image processing (Online) pp. 128 - 131
Main Authors: Nguyen Huu, Thuc, Van Duong, Vinh, Jeon, Byeungwoo
Format: Conference Proceeding
Language:English
Published: IEEE 01.12.2020
Subjects:
Complexity theory
compression
Correlation
Decoding
Encoding
Image coding
Light Field video
Light fields
MV-HEVC
random-access
Video coding
ISSN:2642-9357
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Abstract The increasing prevalence of VR/AR as well as the expected availability of Light Field (LF) display soon call for more practical methods to transmit LF image/video for services. In that aspect, the LF video coding should not only consider the compression efficiency but also the view random-access capability (especially in the multi-view-based system). The multi-view coding system heavily exploits view dependencies coming from both inter-view and temporal correlation. While such a system greatly improves the compression efficiency, its view random-access capability can be much reduced due to so called "chain of dependencies." In this paper, we first model the chain of dependencies by a tree, then a cost function is used to assign an importance value to each tree node. By travelling from top to bottom, a node of lesser importance is cut-off, forming a pruned tree to achieve reduction of random-access complexity. Our tree pruning method has shown to reduce about 40% of random-access complexity at the cost of minor compression loss compared to the state-of-the-art methods. Furthermore, it is expected that our method is very lightweight in its realization and also effective on a practical LF video coding system.
AbstractList The increasing prevalence of VR/AR as well as the expected availability of Light Field (LF) display soon call for more practical methods to transmit LF image/video for services. In that aspect, the LF video coding should not only consider the compression efficiency but also the view random-access capability (especially in the multi-view-based system). The multi-view coding system heavily exploits view dependencies coming from both inter-view and temporal correlation. While such a system greatly improves the compression efficiency, its view random-access capability can be much reduced due to so called "chain of dependencies." In this paper, we first model the chain of dependencies by a tree, then a cost function is used to assign an importance value to each tree node. By travelling from top to bottom, a node of lesser importance is cut-off, forming a pruned tree to achieve reduction of random-access complexity. Our tree pruning method has shown to reduce about 40% of random-access complexity at the cost of minor compression loss compared to the state-of-the-art methods. Furthermore, it is expected that our method is very lightweight in its realization and also effective on a practical LF video coding system.
Author Jeon, Byeungwoo
Nguyen Huu, Thuc
Van Duong, Vinh
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  surname: Nguyen Huu
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  givenname: Vinh
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  givenname: Byeungwoo
  surname: Jeon
  fullname: Jeon, Byeungwoo
  email: bjeon@skku.edu
  organization: Sungkyunkwan University,Dept. of Electrical and Computer Engineering,South Korea
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Snippet The increasing prevalence of VR/AR as well as the expected availability of Light Field (LF) display soon call for more practical methods to transmit LF...
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StartPage 128
SubjectTerms Complexity theory
compression
Correlation
Decoding
Encoding
Image coding
Light Field video
Light fields
MV-HEVC
random-access
Video coding
Title Random-access-aware Light Field Video Coding using Tree Pruning Method
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