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End-to-end (E2E) models have shown to outperform state-of-the-art conventional models for streaming speech recognition [1] across many dimensions, including quality (as measured by word error rate (WER)) and endpointer latency [2]. However,…

Audio and Speech Processing · Electrical Eng. & Systems 2021-02-12 Bo Li , Anmol Gulati , Jiahui Yu , Tara N. Sainath , Chung-Cheng Chiu , Arun Narayanan , Shuo-Yiin Chang , Ruoming Pang , Yanzhang He , James Qin , Wei Han , Qiao Liang , Yu Zhang , Trevor Strohman , Yonghui Wu

Automatic speech recognition (ASR) has become increasingly ubiquitous on modern edge devices. Past work developed streaming End-to-End (E2E) all-neural speech recognizers that can run compactly on edge devices. However, E2E ASR models are…

Computation and Language · Computer Science 2021-07-13 Dilin Wang , Yuan Shangguan , Haichuan Yang , Pierce Chuang , Jiatong Zhou , Meng Li , Ganesh Venkatesh , Ozlem Kalinli , Vikas Chandra

Modern end-to-end automatic speech recognition (ASR) models like Whisper not only suffer from reduced recognition accuracy in noise, but also exhibit overconfidence - assigning high confidence to wrong predictions. We conduct a systematic…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-10 Mingyue Huo , Yuheng Zhang , Yan Tang

We present an unsupervised end-to-end training scheme where we discover discrete subword units from speech without using any labels. The discrete subword units are learned under an ASR-TTS autoencoder reconstruction setting, where an…

Computation and Language · Computer Science 2020-04-24 Andy T. Liu , Po-chun Hsu , Hung-yi Lee

Neural network models for audio tasks, such as automatic speech recognition (ASR) and acoustic scene classification (ASC), are susceptible to noise contamination for real-life applications. To improve audio quality, an enhancement module,…

Spoken Grammatical Error Correction (SGEC) and Feedback (SGECF) are crucial for second language learners, teachers and test takers. Traditional SGEC systems rely on a cascaded pipeline consisting of an ASR, a module for disfluency detection…

Computation and Language · Computer Science 2025-05-28 Mengjie Qian , Rao Ma , Stefano Bannò , Kate M. Knill , Mark J. F. Gales

Grammatical feedback is crucial for L2 learners, teachers, and testers. Spoken grammatical error correction (GEC) aims to supply feedback to L2 learners on their use of grammar when speaking. This process usually relies on a cascaded…

Computation and Language · Computer Science 2024-07-22 Stefano Bannò , Rao Ma , Mengjie Qian , Kate M. Knill , Mark J. F. Gales

We propose a bottom-up framework for automatic speech recognition (ASR) in syllable-based languages by unifying language-universal articulatory attribute modeling with syllable-level prediction. The system first recognizes sequences or…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-11 Hao Yen , Pin-Jui Ku , Sabato Marco Siniscalchi , Chin-Hui Lee

Modern language models mostly take sub-words as input, a design that balances the trade-off between vocabulary size, number of parameters, and performance. However, sub-word tokenization still has disadvantages like not being robust to…

Computation and Language · Computer Science 2022-11-24 Chu-Tak Lee , Qipeng Guo , Xipeng Qiu

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

This paper proposes a new approach to perform unsupervised fine-tuning and self-training using unlabeled speech data for recurrent neural network (RNN)-Transducer (RNN-T) end-to-end (E2E) automatic speech recognition (ASR) systems.…

Computation and Language · Computer Science 2022-08-01 Cong-Thanh Do , Mohan Li , Rama Doddipatla

This paper explores the applicability of sequence-to-sequence (Seq2Seq) models based on LSTM units for Automatic Speech Recognition (ASR) task within peer-to-peer learning environments. Leveraging two distinct peer-to-peer learning methods,…

Sound · Computer Science 2024-06-06 Robert Šajina , Ivo Ipšić

Noise robustness is critical when applying automatic speech recognition (ASR) in real-world scenarios. One solution involves the used of speech enhancement (SE) models as the front end of ASR. However, neural network-based (NN-based) SE…

This paper presents a method to train end-to-end automatic speech recognition (ASR) models using unpaired data. Although the end-to-end approach can eliminate the need for expert knowledge such as pronunciation dictionaries to build ASR…

Computation and Language · Computer Science 2019-05-24 Takaaki Hori , Ramon Astudillo , Tomoki Hayashi , Yu Zhang , Shinji Watanabe , Jonathan Le Roux

We present our experiments in training robust to noise an end-to-end automatic speech recognition (ASR) model using intensive data augmentation. We explore the efficacy of fine-tuning a pre-trained model to improve noise robustness, and we…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-27 Jagadeesh Balam , Jocelyn Huang , Vitaly Lavrukhin , Slyne Deng , Somshubra Majumdar , Boris Ginsburg

Segmental models are sequence prediction models in which scores of hypotheses are based on entire variable-length segments of frames. We consider segmental models for whole-word ("acoustic-to-word") speech recognition, with the feature…

Audio and Speech Processing · Electrical Eng. & Systems 2020-11-25 Bowen Shi , Shane Settle , Karen Livescu

Sequence-to-sequence models, such as attention-based models in automatic speech recognition (ASR), are typically trained to optimize the cross-entropy criterion which corresponds to improving the log-likelihood of the data. However, system…

Computation and Language · Computer Science 2017-12-06 Rohit Prabhavalkar , Tara N. Sainath , Yonghui Wu , Patrick Nguyen , Zhifeng Chen , Chung-Cheng Chiu , Anjuli Kannan

Speech recognition applications cover a range of different audio and text distributions, with different speaking styles, background noise, transcription punctuation and character casing. However, many speech recognition systems require…

Computation and Language · Computer Science 2022-10-25 Sanchit Gandhi , Patrick von Platen , Alexander M. Rush

End-to-end acoustic-to-word speech recognition models have recently gained popularity because they are easy to train, scale well to large amounts of training data, and do not require a lexicon. In addition, word models may also be easier to…

Computation and Language · Computer Science 2019-02-20 Shruti Palaskar , Vikas Raunak , Florian Metze

Automatic speech recognition (ASR) technologies today are primarily optimized for given datasets; thus, any changes in the application environment (e.g., acoustic conditions or topic domains) may inevitably degrade the performance. We can…

Computation and Language · Computer Science 2021-07-05 Heng-Jui Chang , Hung-yi Lee , Lin-shan Lee