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The success of retrieval-augmented language models in various natural language processing (NLP) tasks has been constrained in automatic speech recognition (ASR) applications due to challenges in constructing fine-grained audio-text…

Sound · Computer Science 2024-02-06 Jiaming Zhou , Shiwan Zhao , Yaqi Liu , Wenjia Zeng , Yong Chen , Yong Qin

This review paper provides a comprehensive analysis of recent advances in automatic speech recognition (ASR) with bidirectional encoder representations from transformers BERT and connectionist temporal classification (CTC) transformers. The…

Computation and Language · Computer Science 2024-10-15 Noussaiba Djeffal , Hamza Kheddar , Djamel Addou , Ahmed Cherif Mazari , Yassine Himeur

This paper works on non-autoregressive automatic speech recognition. A unimodal aggregation (UMA) is proposed to segment and integrate the feature frames that belong to the same text token, and thus to learn better feature representations…

Computation and Language · Computer Science 2024-03-21 Ying Fang , Xiaofei Li

CTC compressor can be an effective approach to integrate audio encoders to decoder-only models, which has gained growing interest for different speech applications. In this work, we propose a novel CTC compressor based joint speech and text…

Audio and Speech Processing · Electrical Eng. & Systems 2025-01-03 Wei Zhou , Junteng Jia , Leda Sari , Jay Mahadeokar , Ozlem Kalinli

Recently, end-to-end speech recognition with a hybrid model consisting of the connectionist temporal classification(CTC) and the attention encoder-decoder achieved state-of-the-art results. In this paper, we propose a novel CTC decoder…

Sound · Computer Science 2018-11-02 Zhe Yuan , Zhuoran Lyu , Jiwei Li , Xi Zhou

Contrastive Predictive Coding (CPC) is a representation learning method that maximizes the mutual information between intermediate latent representations and the output of a given model. It can be used to effectively initialize the encoder…

Computation and Language · Computer Science 2023-02-06 Aparna Khare , Minhua Wu , Saurabhchand Bhati , Jasha Droppo , Roland Maas

Connectionist temporal classification (CTC) provides an end-to-end acoustic model (AM) training strategy. CTC learns accurate AMs without time-aligned phonetic transcription, but sometimes fails to converge, especially in…

Audio and Speech Processing · Electrical Eng. & Systems 2019-02-28 Di He , Xuesong Yang , Boon Pang Lim , Yi Liang , Mark Hasegawa-Johnson , Deming Chen

This paper proposes an adaptation method for end-to-end speech recognition. In this method, multiple automatic speech recognition (ASR) 1-best hypotheses are integrated in the computation of the connectionist temporal classification (CTC)…

Computation and Language · Computer Science 2021-04-01 Cong-Thanh Do , Rama Doddipatla , Thomas Hain

Non-autoregressive (NAR) models for automatic speech recognition (ASR) aim to achieve high accuracy and fast inference by simplifying the autoregressive (AR) generation process of conventional models. Connectionist temporal classification…

Audio and Speech Processing · Electrical Eng. & Systems 2024-03-29 Yuya Fujita , Shinji Watanabe , Xuankai Chang , Takashi Maekaku

In this paper, we propose to improve end-to-end (E2E) spoken language understand (SLU) in an RNN transducer model (RNN-T) by incorporating a joint self-conditioned CTC automatic speech recognition (ASR) objective. Our proposed model is akin…

Machine Learning · Computer Science 2025-01-06 Vishal Sunder , Eric Fosler-Lussier

Recent end-to-end Automatic Speech Recognition (ASR) systems demonstrated the ability to outperform conventional hybrid DNN/ HMM ASR. Aside from architectural improvements in those systems, those models grew in terms of depth, parameters…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-06 Ludwig Kürzinger , Dominik Winkelbauer , Lujun Li , Tobias Watzel , Gerhard Rigoll

The performance of voice-controlled systems is usually influenced by accented speech. To make these systems more robust, the frontend accent recognition (AR) technologies have received increased attention in recent years. As accent is a…

Audio and Speech Processing · Electrical Eng. & Systems 2021-05-06 Zhan Zhang , Xi Chen , Yuehai Wang , Jianyi Yang

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

In this work, we propose a new automatic speech recognition (ASR) system based on feature learning and an end-to-end training procedure for air traffic control (ATC) systems. The proposed model integrates the feature learning block,…

Sound · Computer Science 2021-11-05 Peng Fan , Dongyue Guo , Yi Lin , Bo Yang , Jianwei Zhang

Collecting audio-text pairs is expensive; however, it is much easier to access text-only data. Unless using shallow fusion, end-to-end automatic speech recognition (ASR) models require architecture modifications or additional training…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-10 Emiru Tsunoo , Hayato Futami , Yosuke Kashiwagi , Siddhant Arora , Shinji Watanabe

In recent years, the evolution of end-to-end (E2E) automatic speech recognition (ASR) models has been remarkable, largely due to advances in deep learning architectures like transformer. On top of E2E systems, researchers have achieved…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-12 Shiyi Han , Zhihong Lei , Mingbin Xu , Xingyu Na , Zhen Huang

This paper presents a novel framework for multi-talker automatic speech recognition without the need for auxiliary information. Serialized Output Training (SOT), a widely used approach, suffers from recognition errors due to speaker…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-10 Asahi Sakuma , Hiroaki Sato , Ryuga Sugano , Tadashi Kumano , Yoshihiko Kawai , Tetsuji Ogawa

Aligning acoustic and linguistic representations is a central challenge to bridge the pre-trained models in knowledge transfer for automatic speech recognition (ASR). This alignment is inherently structured and asymmetric: while multiple…

Computation and Language · Computer Science 2026-03-06 Xugang Lu , Peng Shen , Hisashi Kawai

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

In the domain of air traffic control (ATC) systems, efforts to train a practical automatic speech recognition (ASR) model always faces the problem of small training samples since the collection and annotation of speech samples are expert-…

Sound · Computer Science 2021-02-17 Yi Lin , Qin Li , Bo Yang , Zhen Yan , Huachun Tan , Zhengmao Chen