Direction scalability of adaptive directional wavelet transform: An approach using block-lifting based DCT and SPIHT

Yuichi Tanaka, Madoka Hasegawa, Shigeo Kato, Taizo Suzuki, Masaaki Ikehara

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    Adaptive directional wavelet transform is an effective alternative of the traditional 2-D wavelet transform for image coding. It is able to transform an image adaptively along diagonal orientations as well as conventional vertical/horizontal directions. However, it requires to transmit transform direction information to the decoder side. For image coding at very low bitrates, the bit budget of the direction information degrades a reconstructed image quality. In this paper, a method to construct a scalable bitstream for transform directions is presented. We utilize the fact that the matrix yielded by transform direction indices still contains the original image characteristics. The matrix is transformed by a block-lifting based DCT, then encoded by SPIHT to yield a scalable bitstream. Our method is effective for very low bitrate image coding, and is comparable to the non-scalable one for middle-to-high bitrates.

    本文言語English
    ホスト出版物のタイトルISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems
    ホスト出版物のサブタイトルNano-Bio Circuit Fabrics and Systems
    ページ3044-3047
    ページ数4
    DOI
    出版ステータスPublished - 2010 8 31
    イベント2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010 - Paris, France
    継続期間: 2010 5 302010 6 2

    出版物シリーズ

    名前ISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems

    Other

    Other2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010
    国/地域France
    CityParis
    Period10/5/3010/6/2

    ASJC Scopus subject areas

    • ハードウェアとアーキテクチャ
    • 電子工学および電気工学

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