Publication Details
Nikos Deligiannis, Marc Jacobs, Joeri Barbarien, Frederik Verbist, Jozef Skorupa, Rik Van De Walle, Athanassios Skodras, Peter Schelkens, Adrian Munteanu

IEEE International Conference on Digital Signal Processing, DSP 2011

Contribution To Book Anthology


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.