Integer DCT Based on Direct-Lifting of DCT-IDCT for Lossless-to-Lossy Image Coding

Author

Suzuki, Taizo ; Ikehara, Masaaki

Author_Institution

Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama, Japan

Volume

19

Issue

11

fYear

2010

Firstpage

2958

Lastpage

2965

Abstract

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.

Keywords

data compression; discrete cosine transforms; image coding; DCT-IDCT; JPEG formats; MPEG formats; image compression schemes; integer discrete cosine transform; inverse DCT; lossless-to-lossy image coding; side information block; Direct-lifting; integer discrete cosine transform (IntDCT); lossless-to-lossy image coding; side information block (SIB);

fLanguage

English

Journal_Title

Image Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7149

Type

jour

DOI

10.1109/TIP.2010.2051867

Filename

5475264