A smooth extension for the nonexpansive orthogonal wavelet decomposition of finite length signals

Toshiyuki Uto, Masaaki Ikehara

    研究成果: Conference article査読

    抄録

    In transform-based image coding, the periodic extension has the disadvantage that it might introduce high frequency components due to the artificial discontinuities at the signal boundaries. On the other hand, the symmetric extension can't be applied to the two-channel orthogonal filter bank because linear phase is not possible. This paper describes a smooth extension method, which provides the symmetric decimated outputs of the analysis filters at the boundary, for the two-channel orthogonal filter bank to obtain nonexpansive subband signals. In our approach, extended signal has the flexibility and we calculate the smooth one by singular value decomposition. Finally, several image coding and extended signal examples are shown to confirm the validity of the proposed approach.

    本文言語English
    ページ(範囲)625-628
    ページ数4
    ジャーナルICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
    3
    出版ステータスPublished - 2003 9 25
    イベント2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
    継続期間: 2003 4 62003 4 10

    ASJC Scopus subject areas

    • Software
    • Signal Processing
    • Electrical and Electronic Engineering

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