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Transformers have recently dominated the ASR field. Although able to yield good performance, they involve an autoregressive (AR) decoder to generate tokens one by one, which is computationally inefficient. To speed up inference,…

Sound · Computer Science 2023-03-31 Zhifu Gao , Shiliang Zhang , Ian McLoughlin , Zhijie Yan

End-to-end Automatic Speech Recognition (ASR) systems based on neural networks have seen large improvements in recent years. The availability of large scale hand-labeled datasets and sufficient computing resources made it possible to train…

Computer Vision and Pattern Recognition · Computer Science 2023-01-05 Maxime Burchi , Radu Timofte

Direct speech-to-speech translation (S2ST) has achieved impressive translation quality, but it often faces the challenge of slow decoding due to the considerable length of speech sequences. Recently, some research has turned to…

Computation and Language · Computer Science 2024-06-12 Qingkai Fang , Zhengrui Ma , Yan Zhou , Min Zhang , Yang Feng

While autoregressive (AR) LLM-based ASR systems achieve strong accuracy, their sequential decoding limits parallelism and incurs high latency. We propose NLE, a non-autoregressive (NAR) approach that formulates speech recognition as…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-10 Avihu Dekel , Samuel Thomas , Takashi Fukada , George Saon

Non-Autoregressive generation is a sequence generation paradigm, which removes the dependency between target tokens. It could efficiently reduce the text generation latency with parallel decoding in place of token-by-token sequential…

Computation and Language · Computer Science 2022-05-24 Weizhen Qi , Yeyun Gong , Yelong Shen , Jian Jiao , Yu Yan , Houqiang Li , Ruofei Zhang , Weizhu Chen , Nan Duan

Semantic parsing (SP) is a core component of modern virtual assistants like Google Assistant and Amazon Alexa. While sequence-to-sequence-based auto-regressive (AR) approaches are common for conversational semantic parsing, recent studies…

Computation and Language · Computer Science 2022-04-15 Geunseob Oh , Rahul Goel , Chris Hidey , Shachi Paul , Aditya Gupta , Pararth Shah , Rushin Shah

This paper proposes CTC-based non-autoregressive ASR with self-conditioned folded encoders. The proposed method realizes non-autoregressive ASR with fewer parameters by folding the conventional stack of encoders into only two blocks; base…

Audio and Speech Processing · Electrical Eng. & Systems 2022-02-18 Tatsuya Komatsu

This article describes an efficient end-to-end speech translation (E2E-ST) framework based on non-autoregressive (NAR) models. End-to-end speech translation models have several advantages over traditional cascade systems such as inference…

Audio and Speech Processing · Electrical Eng. & Systems 2021-09-10 Hirofumi Inaguma , Yosuke Higuchi , Kevin Duh , Tatsuya Kawahara , Shinji Watanabe

Transducer models have emerged as a promising choice for end-to-end ASR systems, offering a balanced trade-off between recognition accuracy, streaming capabilities, and inference speed in greedy decoding. However, beam search significantly…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-03 Lilit Grigoryan , Vladimir Bataev , Andrei Andrusenko , Hainan Xu , Vitaly Lavrukhin , Boris Ginsburg

Streaming ASR with strict latency constraints is required in many speech recognition applications. In order to achieve the required latency, streaming ASR models sacrifice accuracy compared to non-streaming ASR models due to lack of future…

Computation and Language · Computer Science 2022-03-30 Jay Mahadeokar , Yangyang Shi , Ke Li , Duc Le , Jiedan Zhu , Vikas Chandra , Ozlem Kalinli , Michael L Seltzer

Diffusion Language Models (DLMs) are often advertised as enabling parallel token generation, yet practical fast DLMs frequently converge to left-to-right, autoregressive (AR)-like decoding dynamics. In contrast, genuinely non-AR generation…

Computation and Language · Computer Science 2026-03-02 Pengxiang Li , Dilxat Muhtar , Tianlong Chen , Lu Yin , Shiwei Liu

We present Mask CTC, a novel non-autoregressive end-to-end automatic speech recognition (ASR) framework, which generates a sequence by refining outputs of the connectionist temporal classification (CTC). Neural sequence-to-sequence models…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-18 Yosuke Higuchi , Shinji Watanabe , Nanxin Chen , Tetsuji Ogawa , Tetsunori Kobayashi

Deep learning-based neural receivers offer promising physical-layer solutions for next-generation wireless systems. We propose an axial self-attention transformer neural receiver that achieves state-of-the-art Block Error Rate (BLER)…

Signal Processing · Electrical Eng. & Systems 2026-03-11 SaiKrishna Saketh Yellapragada , Atchutaram K. Kocharlakota , Mário Costa , Esa Ollila , Sergiy A. Vorobyov

We propose self-speculative decoding for speech-aware LLMs by using the CTC encoder as a draft model to accelerate auto-regressive (AR) inference and improve ASR accuracy. Our three-step procedure works as follows: (1) if the frame…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-13 George Saon , Samuel Thomas , Takashi Fukuda , Tohru Nagano , Avihu Dekel , Luis Lastras

Non-autoregressive (NAR) generation, which is first proposed in neural machine translation (NMT) to speed up inference, has attracted much attention in both machine learning and natural language processing communities. While NAR generation…

Computation and Language · Computer Science 2023-07-07 Yisheng Xiao , Lijun Wu , Junliang Guo , Juntao Li , Min Zhang , Tao Qin , Tie-yan Liu

Decoder-only language models (LMs) have been successfully adopted for speech-processing tasks including automatic speech recognition (ASR). The LMs have ample expressiveness and perform efficiently. This efficiency is a suitable…

Audio and Speech Processing · Electrical Eng. & Systems 2024-08-02 Emiru Tsunoo , Hayato Futami , Yosuke Kashiwagi , Siddhant Arora , Shinji Watanabe

End-to-end (E2E) models have gained attention in the research field of automatic speech recognition (ASR). Many E2E models proposed so far assume left-to-right autoregressive generation of an output token sequence except for connectionist…

Audio and Speech Processing · Electrical Eng. & Systems 2020-11-17 Yuya Fujita , Shinji Watanabe , Motoi Omachi , Xuankai Chan

Recently Convolution-augmented Transformer (Conformer) has shown promising results in Automatic Speech Recognition (ASR), outperforming the previous best published Transformer Transducer. In this work, we believe that the output information…

Computation and Language · Computer Science 2022-12-02 Xiaoming Ren , Huifeng Zhu , Liuwei Wei , Minghui Wu , Jie Hao

Diffusion Large Language Models (dLLMs) have recently become a promising alternative to autoregressive large language models (ARMs). Semi-autoregressive (Semi-AR) decoding is widely employed in base dLLMs and advanced decoding strategies…

Computation and Language · Computer Science 2026-04-13 Shun Zou , Yong Wang , Zehui Chen , Lin Chen , Chongyang Tao , Feng Zhao , Xiangxiang Chu

The Transformer has shown impressive performance in automatic speech recognition. It uses the encoder-decoder structure with self-attention to learn the relationship between the high-level representation of the source inputs and embedding…

Audio and Speech Processing · Electrical Eng. & Systems 2020-09-16 Xinyuan Zhou , Grandee Lee , Emre Yılmaz , Yanhua Long , Jiaen Liang , Haizhou Li