| Challenge: | Existing document translation models are based on autoregressive language models, but they are not able to be learned from monolingual documents. |
| Approach: | They propose to use Bayes' rule to create document translation models that can be learned from only parallel sentences and monolingual documents. |
| Outcome: | The proposed model outperforms existing document translation approaches and is based on a novel left-to-right beam-search algorithm. |
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Context-Interactive Pre-Training for Document Machine Translation (2021.naacl-main)
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| Challenge: | Document machine translation typically suffers from a lack of document-level bilingual data. |
| Approach: | They propose a document machine translation model that incorporates contextual information into the training signals by capturing cross-sentence dependency within the target document and cross sentence translation to make better use of contextual information. |
| Outcome: | The proposed model outperforms baselines on three benchmark datasets and significantly outperformed previous approaches. |
Rethinking Document-level Neural Machine Translation (2022.findings-acl)
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| Challenge: | Neural machine translation models are weak enough for document-level translation . current models only translate sentences individually, resulting in poor document coherence . |
| Approach: | They propose to use the original Transformer model to test document-level neural machine translation . they find that the original transformer models can achieve strong results for document translation if trained properly . |
| Outcome: | The proposed model outperforms sentence-level models on nine datasets and two sentence- level datasets across six languages. |
Contextual Refinement of Translations: Large Language Models for Sentence and Document-Level Post-Editing (2024.naacl-long)
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| Challenge: | Large language models have demonstrated considerable success in various natural language processing tasks, but their performance in NMT tasks is still underexplored. |
| Approach: | They propose to use LLMs as automatic post-editors rather than direct translators to improve BLEU and COMET performance. |
| Outcome: | The proposed approach improves BLEU but COMET performance compared to in-context learning. |
Identifying Weaknesses in Machine Translation Metrics Through Minimum Bayes Risk Decoding: A Case Study for COMET (2022.aacl-main)
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| Challenge: | Neural metrics have a high correlation with human judgements but they are hard to eliminate due to their "black box" nature. |
| Approach: | They propose to use minimum bayes risk decoding to explore and quantify weaknesses in COMET models. |
| Outcome: | The proposed model is not sensitive enough to discrepancies in numbers and named entities, and is hard to remove by training on additional synthetic data. |
Document Context Neural Machine Translation with Memory Networks (P18-1)
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| Challenge: | Experimental results show that our model exploits both source and target document context. |
| Approach: | They propose a document-level neural machine translation model which takes both source and target document context into account using memory networks. |
| Outcome: | The proposed model outperforms previous work in terms of BLEU and METEOR in English translations. |
High Quality Rather than High Model Probability: Minimum Bayes Risk Decoding with Neural Metrics (2022.tacl-1)
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| Challenge: | Neural machine translations are ranked below human translations in professional evaluations . |
| Approach: | They apply minimum bayes risk decoding to optimize different metrics of translation quality . they show that model estimates and translation quality only vaguely correlate . |
| Outcome: | The proposed method improves human translations with different models and metric. |
Target-Side Augmentation for Document-Level Machine Translation (2023.acl-long)
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| Challenge: | Document-level machine translation faces the challenge of data sparsity due to its long input length and a small amount of training data. |
| Approach: | They propose a document-level machine translation model that generates many potential translations for each source document and smoothes the distribution. |
| Outcome: | The proposed method outperforms the previous best system by 2.30 s-BLEU on News and achieves new state-of-the-art on News . |
A Simple and Effective Unified Encoder for Document-Level Machine Translation (2020.acl-main)
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| Challenge: | Existing models for document-level machine translation use two separate encoders to model the source sentences and document- level contexts. |
| Approach: | They propose a unified encoder that can outperform existing models of dual-encoder models . they propose to use document-level contexts to model the interaction between the contexts and the source sentences . |
| Outcome: | The proposed model outperforms baseline models of dual-encoder models in terms of BLEU and METEOR scores. |
Understanding the Properties of Minimum Bayes Risk Decoding in Neural Machine Translation (2021.acl-long)
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| Challenge: | Neural Machine Translation (NMT) currently exhibits biases such as producing translations that are too short and overgenerating frequent words. |
| Approach: | They propose to use minimum bayes risk decoding instead of beam search to investigate the effects of beam decoding on unbiased samples. |
| Outcome: | The proposed method improves on a number of previously reported biases and failure cases of beam search on unbiased samples. |
Modeling Context With Linear Attention for Scalable Document-Level Translation (2022.findings-emnlp)
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| Challenge: | Document-level machine translation models lack quadratic complexity in the sequence length due to their attention layers. |
| Approach: | They evaluate a recent linear attention model with a sentential gate to promote a recency inductive bias and compare it to open-source document translation. |
| Outcome: | The proposed model significantly improves translation quality on IWSLT 2015 and OpenSubtitles 2018 with similar or better BLEU scores. |