Paper: On the Elements of an Accurate Tree-to-String Machine Translation System

ACL ID P14-2024
Title On the Elements of an Accurate Tree-to-String Machine Translation System
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2014
Authors

While tree-to-string (T2S) translation the- oretically holds promise for efficient, ac- curate translation, in previous reports T2S systems have often proven inferior to other machine translation (MT) methods such as phrase-based or hierarchical phrase-based MT. In this paper, we attempt to clarify the reason for this performance gap by investigating a number of peripheral ele- ments that affect the accuracy of T2S sys- tems, including parsing, alignment, and search. Based on detailed experiments on the English-Japanese and Japanese- English pairs, we show how a basic T2S system that performs on par with phrase- based systems can be improved by 2.6-4.6 BLEU, greatly exceeding existing state- of-the-art methods. These results indi- cate that T2S systems indeed hold much promise, but the abo...