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- W2084113041 abstract "In near lossless source coding with decoder only side information, i.e., Slepian-Wolf coding (with one encoder), a source X with finite alphabet X is first encoded, and then later decoded subject to a small error probability with the help of side information Y with finite alphabet Y available only to the decoder. The classical result by Slepian and Wolf shows that the minimum average compression rate achievable asymptotically subject to a small error probability constraint for a memoryless pair (X , Y) is given by the conditional entropy H(X|Y). In this paper, we look beyond conditional entropy and investigate the tradeoff between compression rate and decoding error spectrum in Slepian-Wolf coding when the decoding error probability goes to zero exponentially fast. It is shown that when the decoding error probability goes to zero at the speed of 2-deltan, where delta is a positive constant and n denotes the source sequences' length, the minimum average compression rate achievable asymptotically is strictly greater than H(X|Y) regardless of how small delta is. More specifically, the minimum average compression rate achievable asymptotically is lower bounded by a quantity called the intrinsic conditional entropy Hin(X|Y, delta), which is strictly greater than H(X|Y), and is also asymptotically achievable for small delta." @default.
- W2084113041 created "2016-06-24" @default.
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- W2084113041 date "2008-01-01" @default.
- W2084113041 modified "2023-09-27" @default.
- W2084113041 title "Near lossless source coding with side information at the decoder: Beyond conditional entropy" @default.
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- W2084113041 doi "https://doi.org/10.1109/ita.2008.4601089" @default.
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