DocumentCode :
350671
Title :
Unequal error protection of images over Rayleigh fading channels
Author :
Yap, Chi W. ; Ngan, King N.
Author_Institution :
Visual Commun. Res. Group, Univ. of Western Australia, Crawley, WA, Australia
Volume :
1
fYear :
1999
fDate :
1999
Firstpage :
19
Abstract :
This paper introduces a method of transmitting error resilient SPIHT coded images over highly error prone Rayleigh fading channels. Firstly, the source significance of the SPIHT coded output is obtained. Based upon the significance of the bits, the channel coding is varied accordingly. Channel coding consists of a mixture of rate compatible punctured convolutional (RCPC) codes and interleaving to combat the burst errors produced by the fading channel. An additional error concealment technique is also introduced into the SPIHT decoder to improve its results in cases where errors cause the corruption of the average luminance level during decoding. Comparison with using RS block codes at a total transmission rate of 1.0 bpp (bits/pixel) is carried out over fading channels with very high error rates to show the superiority of this method over methods using fixed rate burst error codes
Keywords :
Rayleigh channels; channel coding; convolutional codes; decoding; image coding; land mobile radio; source coding; visual communication; RS block codes; Rayleigh fading channels; SPIHT decoder; average luminance level; burst errors; channel coding; error concealment technique; fixed rate burst error codes; images; interleaving; rate compatible punctured convolutional codes; transmitting error resilient SPIHT coded images; unequal error protection; Australia; Bandwidth; Channel coding; Decoding; Error correction codes; Fading; Partitioning algorithms; Signal processing; Signal processing algorithms; Sorting;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing and Its Applications, 1999. ISSPA '99. Proceedings of the Fifth International Symposium on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
1-86435-451-8
Type :
conf
DOI :
10.1109/ISSPA.1999.818102
Filename :
818102
Link To Document :
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