Rate-adaptive codes for distributed source coding

Source coding with correlated decoder side information is considered. We impose the practical constraint that the encoder be unaware of even the statistical dependencies between source and side information. Two classes of rate-adaptive distributed source codes, both based on low-density parity-check...

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Vydané v:Signal processing Ročník 86; číslo 11; s. 3123 - 3130
Hlavní autori: Varodayan, David, Aaron, Anne, Girod, Bernd
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Elsevier B.V 01.11.2006
Predmet:
Distributed source coding
Iterative decoding algorithms
LDPC codes
Side information
Slepian–Wolf theorem
Iterative decoding algorithms
Side information
Slepian–Wolf theorem
LDPC codes
Distributed source coding
ISSN:0165-1684, 1872-7557
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Popis
Shrnutí:Source coding with correlated decoder side information is considered. We impose the practical constraint that the encoder be unaware of even the statistical dependencies between source and side information. Two classes of rate-adaptive distributed source codes, both based on low-density parity-check (LDPC) codes, are developed and their design is studied. Specific realizations are shown to be better than alternatives of linear encoding and decoding complexity. The proposed rate-adaptive LDPC accumulate (LDPCA) codes and sum LDPC accumulate (SLDPCA) codes (of length 6336 bits) perform within 10% and 5% of the Slepian–Wolf bound in the moderate and high rate regimes, respectively.
ISSN:0165-1684
1872-7557
DOI:10.1016/j.sigpro.2006.03.012