Open Access

Motion Vector Sharing and Bitrate Allocation for 3D Video-Plus-Depth Coding

  • Ismaël Daribo1,
  • Christophe Tillier1 and
  • Béatrice Pesquet-Popescu1Email author
EURASIP Journal on Advances in Signal Processing20082009:258920

https://doi.org/10.1155/2009/258920

Received: 26 October 2007

Accepted: 21 May 2008

Published: 4 June 2008

Abstract

The video-plus-depth data representation uses a regular texture video enriched with the so-called depth map, providing the depth distance for each pixel. The compression efficiency is usually higher for smooth, gray level data representing the depth map than for classical video texture. However, improvements of the coding efficiency are still possible, taking into account the fact that the video and the depth map sequences are strongly correlated. Classically, the correlation between the texture motion vectors and the depth map motion vectors is not exploited in the coding process. The aim of this paper is to reduce the amount of information for describing the motion of the texture video and of the depth map sequences by sharing one common motion vector field. Furthermore, in the literature, the bitrate control scheme generally fixes for the depth map sequence a percentage of 20% of the texture stream bitrate. However, this fixed percentage can affect the depth coding efficiency, and it should also depend on the content of each sequence. We propose a new bitrate allocation strategy between the texture and its associated per-pixel depth information. We provide comparative analysis to measure the quality of the resulting sequences.

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Authors’ Affiliations

(1)
Signal and Image Processing Department, Telecom ParisTech

Copyright

© Ismaël Daribo et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.