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Non-autoregressive translation (NAT) models remove the dependence on previous target tokens and generate all target tokens in parallel, resulting in significant inference speedup but at the cost of inferior translation accuracy compared to…

机器学习 · 计算机科学 2019-11-25 Junliang Guo , Xu Tan , Linli Xu , Tao Qin , Enhong Chen , Tie-Yan Liu

Non-autoregressive Transformer(NAT) significantly accelerates the inference of neural machine translation. However, conventional NAT models suffer from limited expression power and performance degradation compared to autoregressive (AT)…

计算与语言 · 计算机科学 2023-11-15 Shangtong Gui , Chenze Shao , Zhengrui Ma , Xishan Zhang , Yunji Chen , Yang Feng

Non-autoregressive neural machine translation (NAT) generates each target word in parallel and has achieved promising inference acceleration. However, existing NAT models still have a big gap in translation quality compared to…

计算与语言 · 计算机科学 2020-12-17 Qiu Ran , Yankai Lin , Peng Li , Jie Zhou

In this work, we empirically confirm that non-autoregressive translation with an iterative refinement mechanism (IR-NAT) suffers from poor acceleration robustness because it is more sensitive to decoding batch size and computing device…

计算与语言 · 计算机科学 2022-10-20 Qiang Wang , Xinhui Hu , Ming Chen

Recent advances have made non-autoregressive (NAT) translation comparable to autoregressive methods (AT). However, their evaluation using BLEU has been shown to weakly correlate with human annotations. Limited research compares…

计算与语言 · 计算机科学 2024-05-22 Yafu Li , Huajian Zhang , Jianhao Yan , Yongjing Yin , Yue Zhang

Non-Autoregressive Transformer (NAT) aims to accelerate the Transformer model through discarding the autoregressive mechanism and generating target words independently, which fails to exploit the target sequential information.…

计算与语言 · 计算机科学 2019-06-25 Chenze Shao , Yang Feng , Jinchao Zhang , Fandong Meng , Xilin Chen , Jie Zhou

Non-autoregressive neural machine translation (NART) models suffer from the multi-modality problem which causes translation inconsistency such as token repetition. Most recent approaches have attempted to solve this problem by implicitly…

计算与语言 · 计算机科学 2021-09-15 Jongyoon Song , Sungwon Kim , Sungroh Yoon

Improving neural machine translation (NMT) models using the back-translations of the monolingual target data (synthetic parallel data) is currently the state-of-the-art approach for training improved translation systems. The quality of the…

计算与语言 · 计算机科学 2021-02-16 Idris Abdulmumin , Bashir Shehu Galadanci , Abubakar Isa

Non-autoregressive machine translation (NAT) systems predict a sequence of output tokens in parallel, achieving substantial improvements in generation speed compared to autoregressive models. Existing NAT models usually rely on the…

计算与语言 · 计算机科学 2021-02-24 Chunting Zhou , Graham Neubig , Jiatao Gu

It is difficult for non-autoregressive translation (NAT) models to capture the multi-modal distribution of target translations due to their conditional independence assumption, which is known as the "multi-modality problem", including the…

计算与语言 · 计算机科学 2022-07-12 Kexun Zhang , Rui Wang , Xu Tan , Junliang Guo , Yi Ren , Tao Qin , Tie-Yan Liu

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…

计算与语言 · 计算机科学 2019-06-19 Miguel Graça , Yunsu Kim , Julian Schamper , Shahram Khadivi , Hermann Ney

Recent work on non-autoregressive neural machine translation (NAT) aims at improving the efficiency by parallel decoding without sacrificing the quality. However, existing NAT methods are either inferior to Transformer or require multiple…

计算与语言 · 计算机科学 2021-05-14 Lihua Qian , Hao Zhou , Yu Bao , Mingxuan Wang , Lin Qiu , Weinan Zhang , Yong Yu , Lei Li

Non-autoregressive translation (NAT) reduces the decoding latency but suffers from performance degradation due to the multi-modality problem. Recently, the structure of directed acyclic graph has achieved great success in NAT, which tackles…

计算与语言 · 计算机科学 2023-07-18 Zhengrui Ma , Chenze Shao , Shangtong Gui , Min Zhang , Yang Feng

Due to the unparallelizable nature of the autoregressive factorization, AutoRegressive Translation (ART) models have to generate tokens sequentially during decoding and thus suffer from high inference latency. Non-AutoRegressive Translation…

计算与语言 · 计算机科学 2019-09-17 Zhuohan Li , Zi Lin , Di He , Fei Tian , Tao Qin , Liwei Wang , Tie-Yan Liu

Although neural machine translation models reached high translation quality, the autoregressive nature makes inference difficult to parallelize and leads to high translation latency. Inspired by recent refinement-based approaches, we…

计算与语言 · 计算机科学 2019-11-22 Raphael Shu , Jason Lee , Hideki Nakayama , Kyunghyun Cho

Existing approaches to neural machine translation condition each output word on previously generated outputs. We introduce a model that avoids this autoregressive property and produces its outputs in parallel, allowing an order of magnitude…

计算与语言 · 计算机科学 2018-03-12 Jiatao Gu , James Bradbury , Caiming Xiong , Victor O. K. Li , Richard Socher

Non-autoregressive translation (NAT) significantly accelerates the inference process by predicting the entire target sequence. However, due to the lack of target dependency modelling in the decoder, the conditional generation process…

计算与语言 · 计算机科学 2020-11-03 Liang Ding , Longyue Wang , Di Wu , Dacheng Tao , Zhaopeng Tu

Non-autoregressive machine translation (NAT) has recently made great progress. However, most works to date have focused on standard translation tasks, even though some edit-based NAT models, such as the Levenshtein Transformer (LevT), seem…

计算与语言 · 计算机科学 2023-02-21 Jitao Xu , Josep Crego , François Yvon

Non-autoregressive generation (NAG) has recently attracted great attention due to its fast inference speed. However, the generation quality of existing NAG models still lags behind their autoregressive counterparts. In this work, we show…

计算与语言 · 计算机科学 2021-02-17 Yixuan Su , Deng Cai , Yan Wang , David Vandyke , Simon Baker , Piji Li , Nigel Collier

Recently, non-autoregressive (NAR) neural machine translation models have received increasing attention due to their efficient parallel decoding. However, the probabilistic framework of NAR models necessitates conditional independence…

计算与语言 · 计算机科学 2022-11-14 Xinyou Wang , Zaixiang Zheng , Shujian Huang