Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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HEVC Encoding Method and Problem Analysis for Independent Tile Decoding

타일의 독립적 복호를 위한 HEVC 부호화 방법 및 문제점 분석

  • Received : 2017.07.10
  • Accepted : 2017.09.11
  • Published : 2017.11.30
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Abstract

Ultra-high definition videos, panorama contents, and ultra-wide viewing videos have a huge spatial resolution. However, a whole region of images is not always interesting to viewers due to limitations of system resources and display devices. To allow one or more interesting tiles to be decoded freely without decoding other tiles, this paper introduces a tile-based independent coding method. The propose method restraints motion vectors to be within a tile region shifting motion search area and modifying an initial motion vector. Experiments results show that any desired tile is capable to be decoded independently of other tiles.

4K이상의 초고해상도 영상의 수요가 증가함에 따라 복호화기가 요구하는 데이터 처리량이 늘어났으며, 이에 따라 소비자가 관심을 가지는 영역만을 복호화하는 방법의 필요성이 대두되었다. 이러한 관심영역을 독립적으로 복호화할 수 있는 방법에는 영상을 분할하여 분할된 각각의 영상을 부호화하는 방법과 HEVC(High Efficiency Video Coding)의 Tile기반 부호화를 이용할 수 있다. 본 논문에서는 이러한 영상 분할기반 부호화와 Tile 분할기반 부호화를 통해 관심영역의 독립적인 복호화를 수행할 수 있는 방법을 제안하고 각각의 성능을 분석한다. 실험결과에서는 제안방법의 결과로 부호화된 영상에 대해서 관심영역의 독립적 복호화가 가능함을 보이고 각 방법의 특징을 비교분석한다.

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References

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