Image coding with variable rate RVQ

Author

Kossentini, Faouzi ; Smith, Mark J T ; Barnes, Christopher F.

Author_Institution

Georgia Tech. Lorraine, Metz, France

Volume

3

fYear

1992

fDate

23-26 Mar 1992

Firstpage

369

Abstract

A new residual vector quantizer (RVQ) design algorithm is modified so that the multistage structure can be exploited to produce variable-rate RVQ (VR-RVQ) systems. VR-RVQ systems are shown to have very useful properties: (1) the codebook storage requirement and the search complexity are both reduced; (2) the VR-RVQ system is able to exploit the spatial variance of perceptually important information; and (3) the VR-RVQ codebook can operate over a wide range of rates, without having to store several codebooks. Experiments were performed using VR-RVQ systems with vectors of many sizes, and results show significant improvement over fixed-rate RVQ systems with the same block size

Keywords

image coding; vector quantisation; VR-RVQ systems; codebook storage requirement; image coding; multistage structure; perceptually important information; search complexity; spatial variance; variable rate residual vector quantisation; Algorithm design and analysis; Bit rate; Data compression; Design methodology; Encoding; Image coding; PSNR; Speech coding; Vector quantization; Video compression;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on

Conference_Location

San Francisco, CA

ISSN

1520-6149

Print_ISBN

0-7803-0532-9

Type

conf

DOI

10.1109/ICASSP.1992.226224

Filename

226224