Iterative joint design of source codes and multiresolution channel codes

Author

Goldsmith, Andrea ; Effros, Michelle

Author_Institution

California Inst. of Technol., Pasadena, CA, USA

Volume

1

fYear

1997

fDate

8-12 Jun 1997

Firstpage

319

Abstract

We propose an iterative design algorithm for jointly optimizing source and channel codes. The joint design combines channel-optimized vector quantization (COVQ) for the source code with rate-compatible punctured convolutional (RCPC) coding for the channel code. Our objective is to minimize the average end-to-end distortion. For a given channel SNR and transmission rate, our joint source and channel code design achieves an optimal allocation of bits between the source and channel coders. This optimal allocation can reduce distortion by up to 6 dB over suboptimal allocations for the source data set considered. We also compare the distortion of our joint iterative design with that of two suboptimal design techniques: COVQ optimized for a given channel bit-error-probability, and RCPC channel coding optimized for a given vector quantizer. We conclude by relaxing the fixed transmission rate constraint and jointly optimizing the transmission rate, source code, and channel code

Keywords

channel coding; convolutional codes; error statistics; iterative methods; rate distortion theory; source coding; vector quantisation; COVQ; RCPC coding; average end-to-end distortion; channel bit-error-probability; channel-optimized vector quantization; fixed transmission rate constraint; iterative joint design; multiresolution channel codes; rate-compatible punctured convolutional coding; source codes; suboptimal allocations; suboptimal design; Algorithm design and analysis; Channel coding; Constraint optimization; Convolutional codes; Decoding; Design optimization; Electric breakdown; Engineering profession; Iterative algorithms; Vector quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-3925-8

Type

conf

DOI

10.1109/ICC.1997.605283

Filename

605283