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arXiv 2109.06352cs.CLcs.LG
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不确定性感知的机器翻译评估

Uncertainty-Aware Machine Translation Evaluation

Instituto de Telecomunicações(电信研究所);Unbabel(Unbabel公司);INESC-ID(葡萄牙系统与计算机工程研究所(里斯本分部));Instituto Superior Técnico(高等技术学院);LUMLIS (Lisbon ELLIS Unit)(里斯本ELLIS单元LUMLIS)

Taisiya Glushkova, Chrysoula Zerva, Ricardo Rei, André F. T. Martins

摘要:

最近提出了几种基于神经的度量来评估机器翻译质量。然而,所有这些方法都采用点估计,这在分部一级提供的信息有限。更糟糕的是,它们是在嘈杂、有偏见和缺乏人类判断的情况下训练的,往往导致不可靠的质量预测。在本文中,我们介绍了不确定性感知MT评估和分析的可信度的预测质量。我们将COMET框架与两种不确定性估计方法(Monte Carlo dropout和deep ensembles)相结合,以获得质量分数和置信区间。我们比较了QT21数据集和WMT20指标任务中多个语言对的不确定性感知MT评估方法的性能,并使用MQM注释进行了增强。我们实验不同数量的参考文献,并进一步讨论了有用的不确定性意识的质量估计(没有参考文献),标志可能是关键的翻译错误。

英文摘要:

Several neural-based metrics have been recently proposed to evaluate machine translation quality. However, all of them resort to point estimates, which provide limited information at segment level. This is made worse as they are trained on noisy, biased and scarce human judgements, often resulting in unreliable quality predictions. In this paper, we introduce uncertainty-aware MT evaluation and analyze the trustworthiness of the predicted quality. We combine the COMET framework with two uncertainty estimation methods, Monte Carlo dropout and deep ensembles, to obtain quality scores along with confidence intervals. We compare the performance of our uncertainty-aware MT evaluation methods across multiple language pairs from the QT21 dataset and the WMT20 metrics task, augmented with MQM annotations. We experiment with varying numbers of references and further discuss the usefulness of uncertainty-aware quality estimation (without references) to flag possibly critical translation mistakes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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