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Block motion estimation using wavelet filtering

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2 Author(s)
Ates, H.F. ; Dept. of Electr. Eng., Princeton Univ., NJ, USA ; Orchard, M.T.

Block matching motion compensation achieves savings in residual error energy at the cost of motion vector bit rate. While this tradeoff has proven valuable for many video sequences, there are many obvious examples of blocks for which the cost of motion vectors is not offset by the gains of motion compensation. This paper proposes a multiresolution framework for motion compensated prediction that offers a richer set of options for trading off motion compensation accuracy against the cost of motion vectors. The method improves the prediction at motion boundaries and on covered/uncovered regions, while reducing the bit rate by using less accurate motion vectors in smoother regions. The new algorithm is compared to the full-search block matching in various simulations, and the results show that the algorithm achieves a 10 to 30% reduction in motion vector bit rate. These saving are particularly important in low bit rate applications where motion overhead constitutes a significant percentage of overall bit rate

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Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on  (Volume:6 )

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