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Robust decoding of MDC depth maps for enhanced 3D video over hybrid broadcasting networks

Marcelino, S. Marcelino ; Correia, Pedro F. ; Faria, S.M.M. ; Soares, S.S. ; Assunção, P.A.

Robust decoding of MDC depth maps for enhanced 3D video over hybrid broadcasting networks, Proc IEEE International Symposium on Broadband Multimedia Systems and Broadcasting BMSB, Nara, Japan, Vol. 1, pp. 1 - 5, June, 2016.

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Abstract
This paper addresses the problem of robust decoding of 3D video over hybrid broadcast networks, using Multiple Description Coding (MDC). Despite the fact that MDC allows decoding of any description even when the others are lost in the multipath network, the resulting coarsely decoded depth maps produce unacceptable distortion in synthesised views. This is particularly harmful in the case of intra-coded depth slices because
of subsequent error propagation. To achieve improved quality in the virtual views synthesised from MDC depth maps received with lost descriptions, a method is proposed based on the depth geometric information extracted from the received descriptions and also from texture motion. Accurate recovery of either lost or coarsely decoded depth slices from one single description, is achieved by jointly using motion information, depth map edges and spatially neighbouring depth values. Comparing with MDC decoding without enhanced reconstruction of lost descriptions, the proposed method reaches quality gains up to 2.29dB for loss rates of 10%.