Smooth extension for nonexpansive wavelet decomposition of finite length signals

Toshiyuki Uto, Masaaki Ikehara

    研究成果: Conference article査読

    2 被引用数 (Scopus)

    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. Then, extended signal has the flexibility under the nonexpansive condition. Therefore we can calculate the smooth extended signal 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)II121-II124
    ジャーナルMidwest Symposium on Circuits and Systems
    2
    出版ステータスPublished - 2004 12 1
    イベントThe 2004 47th Midwest Symposium on Circuits and Systems - Conference Proceedings - Hiroshima, Japan
    継続期間: 2004 7 252004 7 28

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 電子工学および電気工学

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