Open Access

Feedback Channel Suppression in Distributed Video Coding with Adaptive Rate Allocation and Quantization for Multiuser Applications

  • Charles Yaacoub1, 2Email author,
  • Joumana Farah1 and
  • Béatrice Pesquet-Popescu2
EURASIP Journal on Wireless Communications and Networking20082008:427247

DOI: 10.1155/2008/427247

Received: 8 January 2008

Accepted: 18 September 2008

Published: 7 October 2008

Abstract

We present a novel rate allocation technique for distributed multiuser video coding systems without the need for a permanent feedback channel. Based on analytical calculations, the system unequally distributes the available bandwidth among the different users, taking into account the actual amount of movement in the transmitted video as well as the transmission conditions of each user. On one hand, the quantization parameters are dynamically tuned in order to optimize the decoding quality. On the other hand, a frame dropping mechanism allows the system to avoid unnecessary channel use, when the analytical estimations show that the successful decoding of a given frame is not possible because of very high motion or bad channel conditions. A significant gain in the system performance is noticed compared with the case of equal allocation of channel resources and constant quantization parameters.

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Authors’ Affiliations

(1)
Department of Engineering, Faculty of Sciences and Computer Engineering, Holy-Spirit University of Kaslik
(2)
Signal and Image Processing Department, TELECOM ParisTech

Copyright

© Charles Yaacoub et al. 2008

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.