Putting Evaluation in Context: Contextual Embeddings Improve Machine Translation Evaluation

ACL 2019  ·  Nitika Mathur, Timothy Baldwin, Trevor Cohn ·

Accurate, automatic evaluation of machine translation is critical for system tuning, and evaluating progress in the field. We proposed a simple unsupervised metric, and additional supervised metrics which rely on contextual word embeddings to encode the translation and reference sentences. We find that these models rival or surpass all existing metrics in the WMT 2017 sentence-level and system-level tracks, and our trained model has a substantially higher correlation with human judgements than all existing metrics on the WMT 2017 to-English sentence level dataset.

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