Optimized source coding and coded modulation for digital transmission of still images on a noisy channel

Author

Pyndiah, Ramesh ; Solaiman, Basel ; Aitsab, Omar

Author_Institution

ENST de Bretagne, Brest, France

Volume

2

fYear

1998

fDate

4-7 Oct 1998

Firstpage

142

Abstract

In this paper, we propose a complete transmission system for still images which minimizes the distortion introduced by residual transmission errors. This system comprises a source encoder combining DCT (discrete cosine transform) and VQ (vector quantization). The compression rate is equal to 16.7 for an average PSNR (peak signal to noise ratio) of 29.2 dB. The data are then encoded by a BCH (63,57,3) block code and mapped on a 64-QAM constellation. The parameters of the code book and channel encoder have been optimized for 64-QAM. For channel decoding, we use maximum likelihood sequence decoding. The PSNR of the reconstructed image in the receiver is equal to 28.6 dB for a channel SNR of 11 dB. This represents a very small degradation of the PSNR (0.6 dB) in presence of a SER (symbol error rate) of 10% at the input of the receiver

Keywords

BCH codes; block codes; channel coding; digital communication; discrete cosine transforms; image coding; interference suppression; maximum likelihood decoding; modulation coding; optimisation; quadrature amplitude modulation; source coding; transform coding; visual communication; 64-QAM constellation; BCH (63,57,3) block code; DCT; SER; VQ; channel decoding; channel encoder; code book; coded modulation; compression rate; digital transmission; discrete cosine transform; distortion; maximum likelihood sequence decoding; noisy channel; optimized source coding; receiver; reconstructed image; residual transmission errors; still images; symbol error rate; vector quantization; Block codes; Books; Digital modulation; Discrete cosine transforms; Image coding; Maximum likelihood decoding; Modulation coding; PSNR; Source coding; Vector quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on

Conference_Location

Chicago, IL

Print_ISBN

0-8186-8821-1

Type

conf

DOI

10.1109/ICIP.1998.723334

Filename

723334