Joint source-channel coding in the presence of feedback

Author

Amanullah, Abu S. ; Salehi, Masoud

Author_Institution

Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA

fYear

1993

fDate

1-3 Nov 1993

Firstpage

930

Abstract

The effect of the presence of a feedback channel on the transmission of information was first considered by Shannon who showed that the capacity of a memory-less channel is not increased by feedback. Later it was shown that the information on a feedback channel can be used to improve the performance of channel coding. Here we show that by employing the feedback information in quantizer design for a noisy channel, one can achieve lower overall distortion compared to the case where feedback is not available or the quantizer is not matched to the channel. We consider an adaptive and a non-adaptive quantization scheme which show that especially for channels with high error rate, feedback information can lead to lower distortion compared to the case where no feedback information is available

Keywords

analogue-digital conversion; encoding; feedback; signal processing; telecommunication channels; Shannon; adaptive quantization; distortion; error rate; feedback channel; feedback information; information transmission; memory-less channel; noisy channel; non-adaptive quantization; performance; quantizer design; source-channel coding; Channel capacity; Channel coding; Communication channels; Correlators; Decoding; Error analysis; Feedback; Output feedback; Quantization; Signal to noise ratio; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-4120-7

Type

conf

DOI

10.1109/ACSSC.1993.342433

Filename

342433