Efficient Multiple-Description Image Coding Using Directional Lifting-Based Transform

Authors:
Nan Zhang;Yan Lu;Feng Wu;Xiaolin Wu;Baocai Yin
Affiliations:
Peking Univ., Beijing;-;-;-;-
Venue:
IEEE Transactions on Circuits and Systems for Video Technology
Year:
2008

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Abstract

This paper proposes an efficient two-description image coding technique. The two side descriptions of an image are generated by quincunx subsampling. The decoding from any side description is done by an interpolation process that exploits sample correlation. Although the quincunx subsampling is a natural choice for the best use of sample correlations in image multiple-description coding (MDC), each side description is not amenable to existing image coding techniques because the pixels are not aligned rectilinearly. We show how this difficulty can be overcome by an adaptive directional lifting (ADL) transform that is particularly suitable for decorrelating samples on the quincunx lattice. The ADL transform can be embedded into JPEG 2000 to construct a practical MD image encoder. Experimental results demonstrate that the proposed image MDC scheme can achieve good coding performance.