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Wavelet based distributed video coding with spatial scalability

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4 Author(s)
Bo Wu ; Inst. of Comput. Technol., Chinese Acad. of Sci., Beijing ; Xiangyang Ji ; Debin Zhao ; Wen Gao

In this paper, an improved spatial scalable wavelet domain distributed video coding (DVC) scheme is proposed. In this scheme, we adaptively apply differential pulse code modulation (DPCM) Wyner-Ziv (WZ) coding and discrete cosine transform (DCT) based intra block coding to reduced-resolution layer. Due to the low energy nature of high-pass subbands, WZ coding can be directly used. At decoder, in full-resolution layer WZ frame decoding, an efficient side information (SI) generation technique for low-pass subband is proposed, in which motion compensated interpolation (MCI) is performed on full-resolution signal. On the other hand, a refined technique is also employed to generate the SI for high-pass subbands by taking advantage of inter-band correlation. Experimental results show that the proposed scheme provides an efficient wavelet domain DVC coding paradigm.

Published in:

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Date of Conference:

18-21 May 2008