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Authors: Mariusz Jakubowski 1 ; João Ascenso 2 and Grzegorz Pastuszak 1

Affiliations: 1 Institute of Radioelectronics, Warsaw University of Technology, Poland ; 2 Instituto Superior de Engenharia de Lisboa – Instituto de Telecomunicações, Portugal

Keyword(s): Wyner-Ziv coding, distributed video coding, rate control.

Related Ontology Subjects/Areas/Topics: Distributed Source Coding ; Image and Video Processing, Compression and Segmentation ; Multimedia ; Multimedia Signal Processing ; Telecommunications

Abstract: In some distributed video coding (DVC) systems, the total bitrate depends mainly on the key frames (Intra coded) quality and on the side information accuracy. In this paper, a rate control (RC) mechanism is proposed to achieve and maintain a certain target bitrate for the overall Intra and WZ bitstream, mainly by adjusting online the Intra frames quality through the quantization parameter (QP). In order to obtain a similar decoded quality of Intra and WZ frames, the relevant parameters: QP for the key frames and the quantization index (QIndex) for WZ frames are controlled jointly. The major novelty of this work is a statistical model that expresses the relationship between QIndex and WZ frames bitrate. The proposed rate control solution is integrated into the VISNET2 WZ codec and the experimental results demonstrate the efficiency of the proposed algorithm to reach and maintain the target bitrate.

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Paper citation in several formats:
Jakubowski, M.; Ascenso, J. and Pastuszak, G. (2008). CONSTANT BITRATE CONTROL FOR A DISTRIBUTED VIDEO CODING SYSTEM. In Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2008) - SIGMAP; ISBN 978-989-8111-60-9, SciTePress, pages 131-138. DOI: 10.5220/0001937501310138

@conference{sigmap08,
author={Mariusz Jakubowski. and João Ascenso. and Grzegorz Pastuszak.},
title={CONSTANT BITRATE CONTROL FOR A DISTRIBUTED VIDEO CODING SYSTEM},
booktitle={Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2008) - SIGMAP},
year={2008},
pages={131-138},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001937501310138},
isbn={978-989-8111-60-9},
}

TY - CONF

JO - Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2008) - SIGMAP
TI - CONSTANT BITRATE CONTROL FOR A DISTRIBUTED VIDEO CODING SYSTEM
SN - 978-989-8111-60-9
AU - Jakubowski, M.
AU - Ascenso, J.
AU - Pastuszak, G.
PY - 2008
SP - 131
EP - 138
DO - 10.5220/0001937501310138
PB - SciTePress

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