A Sub-Character Architecture for Korean Language Processing
Karl Stratos · 2017
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.