Wyner-Ziv video coding with multi-resolution motion refinement: theoretical analysis and practical significance

Wei Liu; Lina Dong; Wenjun Zeng

doi:10.1117/12.769320

28 January 2008 Wyner-Ziv video coding with multi-resolution motion refinement: theoretical analysis and practical significance

Wei Liu, Lina Dong, Wenjun Zeng

Author Affiliations +

Proceedings Volume 6822, Visual Communications and Image Processing 2008; 68221W (2008) https://doi.org/10.1117/12.769320
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

The accuracy of motion estimation (ME) plays an important role in improving the coding efficiency of Wyner-Ziv video coding (WZVC). Most existing WZVC schemes perform ME at the decoder. The unavailability of the current frame on the decoder side usually impairs the accuracy of ME, which also causes the degradation of coding efficiency of WZVC. To improve the accuracy of ME, some works in the literature assume the current frame can be progressively decoded, and the decoder iteratively refines the motion field based on each partially decoded image. In this paper, we present an analytical model to estimate the potential gain by employing multi-resolution motion refinement (MMR), assuming the current frame is progressively decoded in the frequency domain. The theoretical results show that at high rates, WZVC with MMR falls about 1.5 dB behind the conventional inter-frame coding, but outperforms WZVC with motion extrapolation by 0.9 to 5 dB. Significant gain has also been observed in the simulations using real video data.

Citation Download Citation

Wei Liu, Lina Dong, and Wenjun Zeng "Wyner-Ziv video coding with multi-resolution motion refinement: theoretical analysis and practical significance", Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68221W (28 January 2008); https://doi.org/10.1117/12.769320

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