Novel characteristics of even-stacked cosine-modulated filter banks: Non-redundant directional transform and shift-invariance

Seisuke Kyochi, Masaaki Ikehara

    研究成果: Conference article査読

    抄録

    In this paper, we present non-redundant directional transform and shift-invariant transform based on even-stacked cosine-modulated filter banks (ECFBs). M-band dual-tree wavelet transform (MDTWT) recently proposed has rich directional selectivity and near shift-invariance. However, it has two problems. First, it is not critically-sampled transform. Second, it cannot achieve shiftinvariance at all decomposition levels. For these problems, we show a solution based on ECFBs. Critically-sampled ECFBs provide non-redundant transform with rich directional selectivity. Furthermore, oversampled ECFBs with oversampling ratio of 2 can assure the shift-invariance at any decomposition levels. Moreover, ECFBs can be designed from only one prototype filter and guarantee linear phase. In this paper, we verify these facts by theoretical analysis and simulations. copyright by EURASIP.

    本文言語English
    ジャーナルEuropean Signal Processing Conference
    出版ステータスPublished - 2008 12 1
    イベント16th European Signal Processing Conference, EUSIPCO 2008 - Lausanne, Switzerland
    継続期間: 2008 8 252008 8 29

    ASJC Scopus subject areas

    • Signal Processing
    • Electrical and Electronic Engineering

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