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The residual redundancy that remains, intentionally or unintentionally, in source-coded systems can be exploited by joint source-channel coding. This principle has been recently applied to variable-length encoded sequences via iterative decoding. This work improved on past results by proposing list-decoding for variable-length codes (VLCs) with the help of a non-binary outer CRC code. We show that the list Viterbi decoding of VLCs is beneficial, particularly for the redundant ones used in state-of-art video coding standards. For a concatenated VLC and channel code, we propose an approximated list-decoder. Since the feasible decoders for concatenated codes are iterative, this proposed list-decoder has as a subset the recently proposed iterative decoder of VLCs and channel codes. The introduced list-decoder improved the overall performance significantly in AWGN and Rayleigh fading channels even with a short list of L=2.
Published in:
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
(Volume:1
)
Date of Conference: 3-6 Nov. 2002
- Page(s):
- 21 - 25 vol.1
- ISSN :
- 1058-6393
- Print ISBN:
- 0-7803-7576-9
- INSPEC Accession Number:
- 7792610
- Conference Location :
- Pacific Grove, CA, USA
- Digital Object Identifier :
- 10.1109/ACSSC.2002.1197143
- Product Type:
- Conference Publications
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