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In prior work, we proposed a method for vocabulary acquisition based on a co-occurrence model and non-negative matrix factorization. The vocabulary is described in terms of co-occurrence statistics of frame-level acoustic descriptions and suffers from poor scalability to larger vocabularies. Much like whole-word HMM models, there is no reuse of a sub-word units such as phone models. In this paper,...
An overview of the NMF (non-negative matrix factorization) approach for word acquisition from auditory inputs is given. The method can link acoustic realizations of spoken words with information observed in other modalities. The method is applied to the acquisition of a small set of keywords embedded in carrier sentences. A phonetic description is linked to the learned representations which are otherwise...
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