The new extended JPEG coder with variable quantizer using block wavelet transform

Author

Huh, Young ; Hwang, J.J.

Author_Institution

Korea Electrotechnol. Res. Inst., Changwon, South Korea

Volume

43

Issue

3

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

401

Lastpage

409

Abstract

This paper describe the new extended JPEG coder with variable quantizer using the block wavelet transform which has more flexibility in representing the image dye to a pyramid-like multiresolution decomposition. We replace the discrete cosine transform (DCT) module by block-wise discrete wavelet transform (BDWT) module while keeping all the building blocks of the JPEG extension coder. In addition, we generate the variable quantization matrix (Q-matrix) based on the human visual system (HVS) and utilize the activity of the each block to control the bit and image quality. The simulation results show that the proposed scheme has substantially better performance than the JPEG extensions

Keywords

code standards; image coding; image representation; image resolution; matrix algebra; quantisation (signal); telecommunication standards; transform coding; visual perception; wavelet transforms; HVS; block wavelet transform; block-wise discrete wavelet transform; extended JPEG coder; human visual system; image quality; performance; pyramid-like multiresolution decomposition; simulation results; variable quantization matrix; variable quantizer; Discrete cosine transforms; Discrete transforms; Discrete wavelet transforms; Frequency; Humans; Image coding; Quantization; Transform coding; Visual system; Wavelet transforms;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.628649

Filename

628649