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Joint DC coefficient band decoding and motion estimation in Wyner-Ziv video coding Host Publication: IEEE International Conference on Digital Signal Processing, DSP 2011 Authors: N. Deligiannis, M. Jacobs, J. Barbarien, F. Verbist, J. Skorupa, R. Van De Walle, A. Skodras, P. Schelkens and A. Munteanu UsePubPlace: Corfu, Greece Publisher: IEEE Signal Processing Society Publication Date: Jul. 2011 Number of Pages: 6 ISBN: 978-1-4577-0272-3
Abstract: In contrast to traditional predictive coding, Wyner-Ziv video coding enables low-cost encoding architectures, in which the computationally expensive tasks for performing motion estimation are shifted to the decoder-side. In Wyner-Ziv video coding, side-information generation is a key aspect profoundly affecting the compression capacity of the system. This paper presents a novel technique which enables side-information refinement after DC coefficient band decoding in a transform-domain Wyner-Ziv video codec. The proposed side-information refinement approach performs overlapped block motion estimation and compensation, utilizing multi-hypothesis pixel-based prediction. The experimental results show that the presented Wyner-Ziv video codec incorporating the proposed technique yields significant and systematic compression gains of up to 23.22% with respect to the state-of-the-art DISCOVER codec.
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