Integer DCT based on direct-lifting of DCT-IDCT for lossless-to-lossy image coding

Taizo Suzuki, Masaaki Ikehara

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


A discrete cosine transform (DCT) can be easily implemented in software and hardware for the JPEG and MPEG formats. However, even though some integer DCTs (IntDCTs) for lossless-to-lossy image coding have been proposed, such transform requires redesigned devices. This paper proposes a hardware-friendly IntDCT that can be applied to both lossless and lossy coding. Our IntDCT is implemented by direct-lifting of DCT and inverse DCT (IDCT). Consequently, any existing DCT device can be directly applied to every lifting block. Although our method requires a small side information block (SIB), it is validated by its application to lossless-to-lossy image coding.

Original languageEnglish
Article number5475264
Pages (from-to)2958-2965
Number of pages8
JournalIEEE Transactions on Image Processing
Issue number11
Publication statusPublished - 2010 Nov


  • Direct-lifting
  • integer discrete cosine transform (IntDCT)
  • lossless-to-lossy image coding
  • side information block (SIB)

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design


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