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SUMMARY:Merge Frame Design for Interactive Media Streaming Applications
DTSTART:20160303T110000
DTEND:20160303T123000
DTSTAMP:20260408T034923Z
UID:75204f8bfdce9e1fd1b65f66359ab7434e51fe331e69620e78fa8937
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Gene Cheung\, NII\, Tokyo\nThe advent of multi-camera / 
 light field capturing technologies means that the acquired image / video d
 ata can be in much higher dimension than a user is able to observe on his 
 conventional display. This means a user must navigate through the high dim
 ensional data one image at a time\, resulting in an interactive streaming 
 paradigm: a user periodically requests one data subset from server\, and t
 he server must transmit pre-encoded data for correct decoding of the reque
 sted media. Achieving good compression efficiency for interactive streamin
 g is difficult\, because the image navigation path by a user is not known 
 at encoding time\, making differential coding difficult to employ.\nWe pro
 pose a new distributed source coding (DSC) approach to support high-dimens
 ional image navigation. Specifically\, we design a merge frame (M-frame) t
 o “merge” multiple side information (SI) frames--each can possibly be 
 available at the decoder buffer due to different navigation paths—into a
  unique frame reconstruction to facilitate differential coding. We use a p
 iecewise constant (PWC) function as the merge operator\, and transmit a se
 ries of parameters of these PWC merge functions in order to guarantee iden
 tical reconstruction given the known SI blocks. We consider two different 
 scenarios.\nIn the first case\, a target frame is first given\, and then m
 erge parameters are chosen so that this frame can be reconstructed exactly
  at the decoder. In the second scenario\, the reconstructed frame and merg
 e parameters are jointly optimized to meet a rate-distortion criteria. Exp
 eriments show that for both scenarios\, our  proposed merge techniques ca
 n outperform both a recent DSC approach using bit-plane and channel coding
  and the SP-frame approach in H.264\, in terms of compression efficiency a
 nd decoder complexity. Finally\, we discuss how the proposed M-frame can b
 e used to design frame structures for an interactive light field streaming
  application.
LOCATION:ELA 2 http://plan.epfl.ch/?lang=en&room=ELA+2
STATUS:CONFIRMED
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