Audiovisual focus of attention and its application to Ultra High Definition video compression

Martin Rerabek, Hiromi Nemoto, Jong Seok Lee, Touradj Ebrahimi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Using Focus of Attention (FoA) as a perceptual process in image and video compression belongs to well-known approaches to increase coding efficiency. It has been shown that foveated coding, when compression quality varies across the image according to region of interest, is more efficient than the alternative coding, when all region are compressed in a similar way. However, widespread use of such foveated compression has been prevented due to two main conflicting causes, namely, the complexity and the efficiency of algorithms for FoA detection. One way around these is to use as much information as possible from the scene. Since most video sequences have an associated audio, and moreover, in many cases there is a correlation between the audio and the visual content, audiovisual FoA can improve efficiency of the detection algorithm while remaining of low complexity. This paper discusses a simple yet efficient audiovisual FoA algorithm based on correlation of dynamics between audio and video signal components. Results of audiovisual FoA detection algorithm are subsequently taken into account for foveated coding and compression. This approach is implemented into H.265/HEVC encoder producing a bitstream which is fully compliant to any H.265/HEVC decoder. The influence of audiovisual FoA in the perceived quality of high and ultra-high definition audiovisual sequences is explored and the amount of gain in compression efficiency is analyzed.

Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Human Vision and Electronic Imaging XIX
PublisherSPIE
ISBN (Print)9780819499318
DOIs
Publication statusPublished - 2014
EventHuman Vision and Electronic Imaging XIX - San Francisco, CA, United States
Duration: 2014 Feb 32014 Feb 6

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9014
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherHuman Vision and Electronic Imaging XIX
Country/TerritoryUnited States
CitySan Francisco, CA
Period14/2/314/2/6

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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