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- W2169417103 abstract "We present a new lossy compressor for discrete sources. For coding a source sequence x <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>n</sup> , the encoder starts by assigning a certain cost to each reconstruction sequence. It then finds the reconstruction that minimizes this cost and describes it losslessly to the decoder via a universal lossless compressor. The cost of a sequence is given by a linear combination of its empirical probabilities of some order k+1 and its distortion relative to the source sequence. The linear structure of the cost in the empirical count matrix allows the encoder to employ a Viterbi-like algorithm for obtaining the minimizing reconstruction sequence simply. We identify a choice of coefficients for the linear combination in the cost function which ensures that the algorithm universally achieves the optimum rate-distortion performance of any Markov source in the limit of large n, provided k is increased as o(log n)." @default.
- W2169417103 created "2016-06-24" @default.
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- W2169417103 date "2009-03-01" @default.
- W2169417103 modified "2023-09-27" @default.
- W2169417103 title "An Implementable Scheme for Universal Lossy Compression of Discrete Markov Sources" @default.
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- W2169417103 doi "https://doi.org/10.1109/dcc.2009.72" @default.
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