On the optimality of embedded deadzone scalar-quantizers for wavelet-based L-infinite-constrained image coding

Author

Alecu, Alin ; Munteanu, Adrian ; Cornelis, Jan ; Dewitte, Steven ; Schelkens, Peter

Author_Institution

Electron. & Inf. Process. Dept., Vrije Univ. Brussel, Brussels, Belgium

Volume

11

Issue

3

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

367

Lastpage

370

Abstract

In wavelet-based L_∞-constrained embedded coding, the bit-stream is truncated at the bit-rate that corresponds to a guaranteed, user-defined distortion bound. The letter analyzes the optimality of embedded deadzone scalar-quantizers for high-rate L_∞-constrained scalable wavelet-based image coding. A rate-distortion model applicable to the family of embedded deadzone scalar-quantizers is derived and experimentally validated. Conclusions are drawn regarding the optimal subband-quantizer instantiations. The optimal quantizers are employed in a coding algorithm that retains the coding performance and the flexibility options of wavelet-based codecs while allowing for a fully embedded L_∞-oriented bit-stream.

Keywords

error statistics; image coding; optimisation; rate distortion theory; transform coding; wavelet transforms; L-infinite norm; bit-rate; bit-stream; embedded deadzone scalar-quantizers; optimal subband-quantizer instantiations; rate-distortion model; user-defined distortion bound; wavelet-based L-infinite-constrained image coding; wavelet-based codecs; Codecs; Density functional theory; Entropy; Image analysis; Image coding; Image reconstruction; Pixel; Quantization; Rate-distortion; Wavelet analysis;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2003.822599

Filename

1268031