Prefilter approach for the design of the lapped orthogonal transform basis

ChangWoo Lee; Sang Uk Lee

doi:10.1117/12.157885

22 October 1993 Prefilter approach for the design of the lapped orthogonal transform basis

ChangWoo Lee, Sang Uk Lee

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157885
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

In this paper, we propose a new method to design the LOT basis with the view of maximizing the transform coding gain. In our approach, only the linear phase basis is considered, since the nonlinear phase basis is inappropriate to the image coding. The proposed design technique for the LOT basis is mainly based on decomposing the transform matrix into an orthogonal matrix and the prefilter matrix. Based on the decomposition, the prefilter matrix and the orthogonal matrix are designed separately. It is shown that the proposed LOT yields the improved coding gain as compared to the conventional LOT.

Citation Download Citation

ChangWoo Lee and Sang Uk Lee "Prefilter approach for the design of the lapped orthogonal transform basis", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157885

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