Overview of the Patent Machine Translation Task at the NTCIR-9 Workshop.

This paper gives an overview of the Patent Machine Translation Task (PatentMT) at NTCIR-9 by describing the test collection, evaluation methods, and evaluation results. We organized three patent machine translation subtasks: Chinese to English, Japanese to English, and English to Japanese. For these subtasks, we provided large-scale test collections, including training data, development data and test data. In total, 21 research groups participated and 130 runs were submitted. We conducted human evaluations for adequacy and acceptability, as well as automatic evaluation.