A Sub-Character Architecture for Korean Language Processing

Karl Stratos


Abstract
We introduce a novel sub-character architecture that exploits a unique compositional structure of the Korean language. Our method decomposes each character into a small set of primitive phonetic units called jamo letters from which character- and word-level representations are induced. The jamo letters divulge syntactic and semantic information that is difficult to access with conventional character-level units. They greatly alleviate the data sparsity problem, reducing the observation space to 1.6% of the original while increasing accuracy in our experiments. We apply our architecture to dependency parsing and achieve dramatic improvement over strong lexical baselines.
Anthology ID:
D17-1075
Volume:
Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing
Month:
September
Year:
2017
Address:
Copenhagen, Denmark
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
721–726
Language:
URL:
https://www.aclweb.org/anthology/D17-1075
DOI:
10.18653/v1/D17-1075
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PDF:
http://aclanthology.lst.uni-saarland.de/D17-1075.pdf