TRADEOFF BETWEEN SOURCE AND CHANNEL CODING

Citation
B. Hochwald et K. Zeger, TRADEOFF BETWEEN SOURCE AND CHANNEL CODING, IEEE transactions on information theory, 43(5), 1997, pp. 1412-1424
Citations number
16
Categorie Soggetti
Information Science & Library Science","Engineering, Eletrical & Electronic
ISSN journal
00189448
Volume
43
Issue
5
Year of publication
1997
Pages
1412 - 1424
Database
ISI
SICI code
0018-9448(1997)43:5<1412:TBSACC>2.0.ZU;2-8
Abstract
A fundamental problem in the transmission of analog information across a noisy discrete channel is the choice of channel code rate that opti mally allocates the available transmission rate between lossy source c oding and block channel coding, We establish tight bounds on the chann el code rate that minimizes the average distortion of a vector quantiz er cascaded with a channel coder and a binary-symmetric channel, Analy tic expressions are derived in two cases of interest: small bit-error probability and arbitrary source vector dimension; arbitrary bit-error probability and large source vector dimension, We demonstrate that th e optimal channel code rate is often substantially smaller than the ch annel capacity, and obtain a noisy-channel version of the Zador high-r esolution distortion formula.