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Back-translation is an effective strategy to improve the performance of Neural Machine Translation~(NMT) by generating pseudo-parallel data. However, several recent works have found that better translation quality of the pseudo-parallel…

Computation and Language · Computer Science 2021-02-17 Hieu Pham , Xinyi Wang , Yiming Yang , Graham Neubig

In neural machine translation (NMT), generation of a target word depends on both source and target contexts. We find that source contexts have a direct impact on the adequacy of a translation while target contexts affect the fluency.…

Computation and Language · Computer Science 2017-03-09 Zhaopeng Tu , Yang Liu , Zhengdong Lu , Xiaohua Liu , Hang Li

Although attention-based Neural Machine Translation (NMT) has achieved remarkable progress in recent years, it still suffers from issues of repeating and dropping translations. To alleviate these issues, we propose a novel key-value…

Computation and Language · Computer Science 2018-07-02 Fandong Meng , Zhaopeng Tu , Yong Cheng , Haiyang Wu , Junjie Zhai , Yuekui Yang , Di Wang

This paper studies the practicality of the current state-of-the-art unsupervised methods in neural machine translation (NMT). In ten translation tasks with various data settings, we analyze the conditions under which the unsupervised…

Computation and Language · Computer Science 2020-04-23 Yunsu Kim , Miguel Graça , Hermann Ney

While very deep neural networks have shown effectiveness for computer vision and text classification applications, how to increase the network depth of neural machine translation (NMT) models for better translation quality remains a…

Computation and Language · Computer Science 2019-07-04 Lijun Wu , Yiren Wang , Yingce Xia , Fei Tian , Fei Gao , Tao Qin , Jianhuang Lai , Tie-Yan Liu

Current state-of-the-art NMT systems use large neural networks that are not only slow to train, but also often require many heuristics and optimization tricks, such as specialized learning rate schedules and large batch sizes. This is…

Computation and Language · Computer Science 2019-03-27 Emmanouil Antonios Platanios , Otilia Stretcu , Graham Neubig , Barnabas Poczos , Tom M. Mitchell

In this paper, we show that the combination of Phrase Pair Injection and Corpus Filtering boosts the performance of Neural Machine Translation (NMT) systems. We extract parallel phrases and sentences from the pseudo-parallel corpus and…

Computation and Language · Computer Science 2023-01-20 Akshay Batheja , Pushpak Bhattacharyya

Neural conditional language generation models achieve the state-of-the-art in Neural Machine Translation (NMT) but are highly dependent on the quality of parallel training dataset. When trained on low-quality datasets, these models are…

Computation and Language · Computer Science 2023-06-16 Joël Tang , Marina Fomicheva , Lucia Specia

Back-translation - data augmentation by translating target monolingual data - is a crucial component in modern neural machine translation (NMT). In this work, we reformulate back-translation in the scope of cross-entropy optimization of an…

Computation and Language · Computer Science 2019-06-19 Miguel Graça , Yunsu Kim , Julian Schamper , Shahram Khadivi , Hermann Ney

We test the natural expectation that using MT in professional translation saves human processing time. The last such study was carried out by Sanchez-Torron and Koehn (2016) with phrase-based MT, artificially reducing the translation…

Computation and Language · Computer Science 2021-09-13 Vilém Zouhar , Aleš Tamchyna , Martin Popel , Ondřej Bojar

Multilingual neural machine translation (NMT) enables training a single model that supports translation from multiple source languages into multiple target languages. In this paper, we push the limits of multilingual NMT in terms of number…

Computation and Language · Computer Science 2019-07-03 Roee Aharoni , Melvin Johnson , Orhan Firat

Neural Machine Translation (NMT) has become a popular technology in recent years, and the encoder-decoder framework is the mainstream among all the methods. It's obvious that the quality of the semantic representations from encoding is very…

Computation and Language · Computer Science 2020-01-15 Boyuan Pan , Yazheng Yang , Zhou Zhao , Yueting Zhuang , Deng Cai

The development of general-domain neural machine translation (NMT) methods has advanced significantly in recent years, but the lack of naturalness and musical constraints in the outputs makes them unable to produce singable lyric…

Computation and Language · Computer Science 2023-05-29 Longshen Ou , Xichu Ma , Min-Yen Kan , Ye Wang

In this study, we first investigate a novel capsule network with dynamic routing for linear time Neural Machine Translation (NMT), referred as \textsc{CapsNMT}. \textsc{CapsNMT} uses an aggregation mechanism to map the source sentence into…

Computation and Language · Computer Science 2020-10-13 Mingxuan Wang , Jun Xie , Zhixing Tan , Jinsong Su , Deyi Xiong , Lei Li

Nearest Neighbor Machine Translation (kNNMT) is a simple and effective method of augmenting neural machine translation (NMT) with a token-level nearest neighbor retrieval mechanism. The effectiveness of kNNMT directly depends on the quality…

Computation and Language · Computer Science 2022-12-20 Jiahuan Li , Shanbo Cheng , Zewei Sun , Mingxuan Wang , Shujian Huang

In this paper, we extend an attention-based neural machine translation (NMT) model by allowing it to access an entire training set of parallel sentence pairs even after training. The proposed approach consists of two stages. In the first…

Computation and Language · Computer Science 2018-03-09 Jiatao Gu , Yong Wang , Kyunghyun Cho , Victor O. K. Li

In the encoder-decoder architecture for neural machine translation (NMT), the hidden states of the recurrent structures in the encoder and decoder carry the crucial information about the sentence.These vectors are generated by parameters…

Computation and Language · Computer Science 2017-08-08 Rongxiang Weng , Shujian Huang , Zaixiang Zheng , Xinyu Dai , Jiajun Chen

Multilingual neural machine translation (NMT) has recently been investigated from different aspects (e.g., pivot translation, zero-shot translation, fine-tuning, or training from scratch) and in different settings (e.g., rich resource and…

Computation and Language · Computer Science 2019-12-30 Xu Tan , Yichong Leng , Jiale Chen , Yi Ren , Tao Qin , Tie-Yan Liu

In this paper, we propose an effective way for biasing the attention mechanism of a sequence-to-sequence neural machine translation (NMT) model towards the well-studied statistical word alignment models. We show that our novel guided…

Computation and Language · Computer Science 2016-07-07 Wenhu Chen , Evgeny Matusov , Shahram Khadivi , Jan-Thorsten Peter

Back-translation is a critical component of Unsupervised Neural Machine Translation (UNMT), which generates pseudo parallel data from target monolingual data. A UNMT model is trained on the pseudo parallel data with translated source, and…

Computation and Language · Computer Science 2022-03-24 Zhiwei He , Xing Wang , Rui Wang , Shuming Shi , Zhaopeng Tu