Integer discrete cosine transform via lossless Walsh-Hadamard transform with structural regularity for low-bit-word-length

Taizo Suzuki, Masaaki Ikehara

    研究成果: Article査読

    6 被引用数 (Scopus)

    抄録

    This paper presents an integer discrete cosine transform (IntDCT) with only dyadic values such as k/2n (k, n ∈ ℕ). Although some conventional IntDCTs have been proposed, they are not suitable for lossless-to-lossy image coding in low-bit-word-length (coefficients) due to the degradation of the frequency decomposition performance in the system. First, the proposed M-channel lossless Walsh-Hadamard transform (LWHT) can be constructed by only (log2 M)-bit-word-length and has structural regularity. Then, our 8-channel IntDCT via LWHT keeps good coding performance even if low-bit-word-length is used because LWHT, which is main part of IntDCT, can be implemented by only 3-bit-wordlength. Finally, the validity of our method is proved by showing the results of lossless-to-lossy image coding in low-bit-word-length.

    本文言語English
    ページ(範囲)734-741
    ページ数8
    ジャーナルIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
    E93-A
    4
    DOI
    出版ステータスPublished - 2010 4

    ASJC Scopus subject areas

    • Signal Processing
    • Computer Graphics and Computer-Aided Design
    • Electrical and Electronic Engineering
    • Applied Mathematics

    フィンガープリント 「Integer discrete cosine transform via lossless Walsh-Hadamard transform with structural regularity for low-bit-word-length」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル