Meta-Learning Neural Bloom Filters
Authors: Jack W Rae, Sergey Bartunov, Timothy P Lillicrap
Keywords: meta-learning, memory, one-shot learning, bloom filter, set membership, familiarity, compression
TL;DR: We investigate the space efficiency of memory-augmented neural nets when learning set membership.
Abstract: There has been a recent trend in training neural networks to replace data structures that have been crafted by hand, with an aim for faster execution, better accuracy, or greater compression.  In this setting, a neural data structure is instantiated by training a network over many epochs of its inputs until convergence. In many applications this expensive initialization is not practical, for example streaming algorithms --- where inputs are ephemeral and can only be inspected a small number of times.  In this paper we explore the learning of approximate set membership over a stream of data in one-shot via meta-learning. We propose a novel memory architecture, the Neural Bloom Filter, which we show to be more compressive than Bloom Filters and several existing memory-augmented neural networks in scenarios of skewed data or structured sets.