In plain words: A memory network that updates at several speeds at once, picking up nested structure in a sequence without being told where segments begin and end. Unlike ordinary networks that update at one fixed speed, it found the hidden hierarchy in character-level text and handwriting.
Abstract
Learning both hierarchical and temporal representation has been among the long-standing challenges of recurrent neural networks. Multiscale recurrent neural networks have been considered as a promising approach to resolve this issue, yet there has been a lack of empirical evidence showing that this type of models can actually capture the temporal dependencies by discovering the latent hierarchical structure of the sequence. In this paper, we propose a novel multiscale approach, called the hierarchical multiscale recurrent neural networks, which can capture the latent hierarchical structure in the sequence by encoding the temporal dependencies with different timescales using a novel update mechanism. We show some evidence that our proposed multiscale architecture can discover underlying hierarchical structure in the sequences without using explicit boundary information. We evaluate our proposed model on character-level language modelling and handwriting sequence modelling.
Junyoung Chung, Sungjin Ahn, Yoshua Bengio
arXiv:1609.01704 · cs.LG · submitted Sep 6, 2016 · updated Mar 9, 2017
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