A technique for the efficient coding of the upper bands in subband coding of images

Author

Johnsen, O. ; Shentov, O. ; Mitra, S.

Author_Institution

Ecole d´´Ingenieurs de Fribourg, Switzerland

fYear

1990

fDate

3-6 Apr 1990

Firstpage

2097

Abstract

A technique is presented for efficient coding of the upper bands in subband coding (SBC) of images. The technique takes advantage of the existing correlation between the subbands and utilizes a local measure of activity in the baseband to predict the amplitude range of the pixels in the upper bands. This permits the design of quantizers better adapted to specific images, thus increasing the coding efficiency as well as enhancing the signal-to-noise ratio (SNR) and the subjective perception. The properties of the proposed technique are not fully investigated, but rather its advantages over standard techniques are demonstrated based on some simple cases

Keywords

encoding; picture processing; SNR; activity index; amplitude range; coding efficiency; correlation; picture processing; pixels; signal-to-noise ratio; subband coding; subjective perception; upper bands; Baseband; Bit rate; Design optimization; Frequency; Image coding; Image processing; Noise shaping; Radio spectrum management; Signal design; Signal to noise ratio; Statistics;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on

Conference_Location

Albuquerque, NM

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1990.115945

Filename

115945