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Video coding using a complex wavelet transform and set partitioning
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DOI：10.1109/LSP.2007.896193.png)
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Abstract
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A video-coding system that exploits the motion-selective characteristics of the 3-D complex dual-tree discrete wavelet transform is presented. The proposed system does not perform explicit motion compensation but instead relies on the dual-tree transform to isolate moving features. Although the dual-tree transform is redundant, a noise-shaping process increases the sparsity of the transform coefficients, resulting in a high degree of spatiotemporally coherent regions of insignificant coefficients. The transform coefficients are coded with binary set-partitioning using k-d trees in an algorithm that exploits both within-subband spatiotemporal coherency as well as cross-subband correlation to achieve efficient coding. Experimental results demonstrate that the proposed system outperforms other coders that also do not perform explicit motion estimation or compensation.
Keywords:
dual-tree wavelet transform
set partitioning
video coding
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