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- W2115442956 abstract "We consider using sparse simplifications to denoise probabilistic sequence models for generative tasks such as speech synthesis. Our proposal is to find the least random model that remains close to the original one according to a KL-divergence constraint, a technique we call minimum entropy rate simplification (MERS). This produces a representation-independent framework for trading off simplicity and divergence, similar to rate-distortion theory. Importantly, MERS uses the cleaned model rather than the original one for the underlying probabilities in the KL-divergence, effectively reversing the conventional argument order. This promotes rather than penalizes sparsity, suppressing uncommon outcomes likely to be errors. We write down the MERS equations for Markov chains, and present an iterative solution procedure based on the Blahut-Arimoto algorithm and a bigram matrix Markov chain representation. We apply the procedure to a music-based Markov grammar, and compare the results to a simplistic thresholding scheme." @default.
- W2115442956 created "2016-06-24" @default.
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- W2115442956 date "2010-08-01" @default.
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- W2115442956 title "Simplified probability models for generative tasks: A rate-distortion approach" @default.
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