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月

ASJC Scopus subject areas

  • 信号処理
  • コンピュータ グラフィックスおよびコンピュータ支援設計
  • 電子工学および電気工学
  • 応用数学

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