DocumentCode :
3420817
Title :
High-rate analysis of source coding for symmetric error channels
Author :
Murthy, Chandra R. ; Rao, Bhaskar D.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
fYear :
2006
fDate :
28-30 March 2006
Firstpage :
163
Lastpage :
172
Abstract :
In this paper, new results are derived for the high-rate performance of source coding for symmetric error channels (i.e., a channel where all index errors are equally likely) for a large class of distortion measures. Expressions are derived for the expected distortion including the effect of channel errors as the number of quantization levels N gets large. It is shown that the distortion can asymptotically be approximated as the sum of the source quantization distortion and the channel error induced distortion. In addition, the expressions obtained can be used to glean key insights on the relative amounts of source and channel coding necessary to attain a balanced system, i.e., one where neither the distortion caused by the source quantization nor the distortion caused by channel errors dominate the performance. Optimization of the codebook for minimizing the expected distortion is also considered, and theoretical expressions are derived for the optimal point density.
Keywords :
channel coding; distortion; source coding; vector quantisation; channel coding; channel error induced distortion; codebook; expected distortion; optimal point density; quantization levels; source coding; source quantization distortion; symmetric error channels; Channel coding; Communication systems; Computer errors; Data compression; Distortion measurement; Electric variables measurement; Redundancy; Source coding; Speech; Vector quantization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Data Compression Conference, 2006. DCC 2006. Proceedings
ISSN :
1068-0314
Print_ISBN :
0-7695-2545-8
Type :
conf
DOI :
10.1109/DCC.2006.38
Filename :
1607251
Link To Document :
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