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Non-autoregressive transformer models have achieved extremely fast inference speed and comparable performance with autoregressive sequence-to-sequence models in neural machine translation. Most of the non-autoregressive transformers decode…

Audio and Speech Processing · Electrical Eng. & Systems 2020-05-19 Zhengkun Tian , Jiangyan Yi , Jianhua Tao , Ye Bai , Shuai Zhang , Zhengqi Wen

Non-autoregressive translation (NAT) models achieve comparable performance and superior speed compared to auto-regressive translation (AT) models in the context of sentence-level machine translation (MT). However, their abilities are…

Computation and Language · Computer Science 2023-12-12 Guangsheng Bao , Zhiyang Teng , Hao Zhou , Jianhao Yan , Yue Zhang

Non-native speech causes automatic speech recognition systems to degrade in performance. Past strategies to address this challenge have considered model adaptation, accent classification with a model selection, alternate pronunciation…

Audio and Speech Processing · Electrical Eng. & Systems 2019-10-03 Shahram Ghorbani , Ahmet E. Bulut , John H. L. Hansen

Direct speech-to-speech translation (S2ST) aims to convert speech from one language into another, and has demonstrated significant progress to date. Despite the recent success, current S2ST models still suffer from distinct degradation in…

Computation and Language · Computer Science 2023-05-25 Rongjie Huang , Huadai Liu , Xize Cheng , Yi Ren , Linjun Li , Zhenhui Ye , Jinzheng He , Lichao Zhang , Jinglin Liu , Xiang Yin , Zhou Zhao

Although diffusion-based, non-autoregressive text-to-speech (TTS) systems have demonstrated impressive zero-shot synthesis capabilities, their efficacy is still hindered by two key challenges: the difficulty of text-speech alignment…

Audio and Speech Processing · Electrical Eng. & Systems 2026-02-06 Chunyat Wu , Jiajun Deng , Zhengxi Liu , Zheqi Dai , Haolin He , Qiuqiang Kong

Non-autoregressive (NAR) modeling has gained more and more attention in speech processing. With recent state-of-the-art attention-based automatic speech recognition (ASR) structure, NAR can realize promising real-time factor (RTF)…

Audio and Speech Processing · Electrical Eng. & Systems 2021-07-21 Tianzi Wang , Yuya Fujita , Xuankai Chang , Shinji Watanabe

Direct speech-to-speech translation (S2ST) has gradually become popular as it has many advantages compared with cascade S2ST. However, current research mainly focuses on the accuracy of semantic translation and ignores the speech style…

Sound · Computer Science 2023-07-26 Kun Song , Yi Ren , Yi Lei , Chunfeng Wang , Kun Wei , Lei Xie , Xiang Yin , Zejun Ma

Recent work on end-to-end automatic speech recognition (ASR) has shown that the connectionist temporal classification (CTC) loss can be used to convert acoustics to phone or character sequences. Such systems are used with a dictionary and…

Computation and Language · Computer Science 2017-03-23 Kartik Audhkhasi , Bhuvana Ramabhadran , George Saon , Michael Picheny , David Nahamoo

Speech-to-Speech Translation (S2ST) refers to the conversion of speech in one language into semantically equivalent speech in another language, facilitating communication between speakers of different languages. Speech-to-Discrete Unit…

Sound · Computer Science 2025-11-10 Rui Zhou , Akinori Ito , Takashi Nose

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…

Computation and Language · Computer Science 2021-02-17 Yixuan Su , Deng Cai , Yan Wang , David Vandyke , Simon Baker , Piji Li , Nigel Collier

In this work, we address the Text-to-Speech (TTS) task by proposing a non-autoregressive architecture called EfficientTTS. Unlike the dominant non-autoregressive TTS models, which are trained with the need of external aligners, EfficientTTS…

Audio and Speech Processing · Electrical Eng. & Systems 2020-12-08 Chenfeng Miao , Shuang Liang , Zhencheng Liu , Minchuan Chen , Jun Ma , Shaojun Wang , Jing Xiao

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…

Computation and Language · Computer Science 2019-09-17 Zhuohan Li , Zi Lin , Di He , Fei Tian , Tao Qin , Liwei Wang , Tie-Yan Liu

Recent advances in large language models (LLMs) have attracted significant interest in extending their capabilities to multimodal scenarios, particularly for speech-to-speech conversational systems. However, existing multimodal models…

Computation and Language · Computer Science 2026-03-26 Tianqiao Liu , Xueyi Li , Hao Wang , Haoxuan Li , Zhichao Chen , Weiqi Luo , Zitao Liu

We present a simple yet effective approach to build multilingual speech-to-text (ST) translation by efficient transfer learning from pretrained speech encoder and text decoder. Our key finding is that a minimalistic LNA (LayerNorm and…

Computation and Language · Computer Science 2021-01-05 Xian Li , Changhan Wang , Yun Tang , Chau Tran , Yuqing Tang , Juan Pino , Alexei Baevski , Alexis Conneau , Michael Auli

Speech-aware language models (LMs) have demonstrated capabilities in understanding spoken language while generating text-based responses. However, enabling them to produce speech output efficiently and effectively remains a challenge. In…

Audio and Speech Processing · Electrical Eng. & Systems 2026-02-12 Yuxuan Hu , Haibin Wu , Ruchao Fan , Xiaofei Wang , Heng Lu , Yao Qian , Jinyu Li

We present a textless speech-to-speech translation (S2ST) system that can translate speech from one language into another language and can be built without the need of any text data. Different from existing work in the literature, we tackle…

Computation and Language · Computer Science 2022-05-06 Ann Lee , Hongyu Gong , Paul-Ambroise Duquenne , Holger Schwenk , Peng-Jen Chen , Changhan Wang , Sravya Popuri , Yossi Adi , Juan Pino , Jiatao Gu , Wei-Ning Hsu

Autoregressive (AR) language models have emerged as powerful solutions for zero-shot text-to-speech (TTS) synthesis, capable of generating natural speech from a few seconds of audio prompts. However, conventional AR-based TTS systems…

Audio and Speech Processing · Electrical Eng. & Systems 2025-08-27 Chun Yat Wu , Jiajun Deng , Guinan Li , Qiuqiang Kong , Simon Lui

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)…

Computation and Language · Computer Science 2023-11-15 Shangtong Gui , Chenze Shao , Zhengrui Ma , Xishan Zhang , Yunji Chen , Yang Feng

Non-autoregressive Transformers (NATs) reduce the inference latency of Autoregressive Transformers (ATs) by predicting words all at once rather than in sequential order. They have achieved remarkable progress in machine translation as well…

Computation and Language · Computer Science 2023-06-05 Chenxin An , Jiangtao Feng , Fei Huang , Xipeng Qiu , Lingpeng Kong

Non-autoregressive (NAR) language models are known for their low latency in neural machine translation (NMT). However, a performance gap exists between NAR and autoregressive models due to the large decoding space and difficulty in…

Computation and Language · Computer Science 2024-07-03 Hao Wang , Tetsuro Morimura , Ukyo Honda , Daisuke Kawahara