Stereo side information generation in low-delay distributed stereo video coding

Matteo Salmistraro, Søren Forchhammer

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Abstract

Distributed Video Coding (DVC) is a technique that allows shifting the computational complexity from the encoder to the decoder. One of the core elements of the decoder is the creation of the Side Information (SI), which is a hypothesis of what the to-be-decoded frame looks like. Much work on DVC has been carried out: often the decoder can use future and past frames in order to obtain the SI exploiting the time redundancy. Other work has addressed a Multiview scenario; exploiting the frames coming from cameras close to the one we are decoding (usually a left and right camera) it is possible to create SI exploiting the inter-view spatial redundancy. A careful fusion of the two SI should be done in order to use the best part of each SI. In this work we study a Stereo Low-Delay scenario using only two views. Due to the delay constraint we use only past frames of the sequence we are decoding and past and present frames of the other. This is done by using Extrapolation, to exploit the time redundancy and well known techniques for stereo error concealment. This allows us to create good quality SI even if we are only using two views. In this work we have also used a new method in order to fuse the two SIs, inspired by Multi-Hypothesis decoding. In this work the multiple hypotheses are used to fuse the SIs. Preliminary results show improvements up to 1 dB.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Volume8499
Number of pages10
ISSN0277-786X
DOIs
Publication statusPublished - 2012
Event2012 Optics+Photonics : Applications of Digital Image Processing XXXV - San Diego Convention Center, San Diego, CA, United States
Duration: 13 Aug 201216 Aug 2012

Conference

Conference2012 Optics+Photonics : Applications of Digital Image Processing XXXV
LocationSan Diego Convention Center
CountryUnited States
CitySan Diego, CA
Period13/08/201216/08/2012

Keywords

  • Distributed Video Coding
  • DVC
  • Multiview DVC
  • Stereo DVC
  • Extrapolation
  • Difference Projection

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