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In this paper, we present an end-to-end automatic speech recognition system, which successfully employs subword units in a hybrid CTC-Attention based system. The subword units are obtained by the byte-pair encoding (BPE) compression…

Audio and Speech Processing · Electrical Eng. & Systems 2018-09-07 Zhangyu Xiao , Zhijian Ou , Wei Chu , Hui Lin

Pre-trained models, especially self-supervised learning (SSL) models, have demonstrated impressive results in automatic speech recognition (ASR) task. While most applications of SSL models focus on leveraging continuous representations as…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-03 Zehan Li , Yan Yang , Xueqing Li , Jian Kang , Xiao-Lei Zhang , Jie Li

Personal rare word recognition in end-to-end Automatic Speech Recognition (E2E ASR) models is a challenge due to the lack of training data. A standard way to address this issue is with shallow fusion methods at inference time. However, due…

Spoken Language Understanding (SLU) is a core task in most human-machine interaction systems. With the emergence of smart homes, smart phones and smart speakers, SLU has become a key technology for the industry. In a classical SLU approach,…

Computation and Language · Computer Science 2022-07-19 Thierry Desot , François Portet , Michel Vacher

In this paper, we propose a self-training approach for automatic speech recognition (ASR) for low-resource settings. While self-training approaches have been extensively developed and evaluated for high-resource languages such as English,…

Computation and Language · Computer Science 2023-08-11 Satwinder Singh , Feng Hou , Ruili Wang

Recent advances in speech foundation models are largely driven by scaling both model size and data, enabling them to perform a wide range of tasks, including speech recognition. Traditionally, ASR models are evaluated using metrics like…

Computation and Language · Computer Science 2025-06-06 Abdul Waheed , Hanin Atwany , Rita Singh , Bhiksha Raj

Sequence-to-sequence models have shown success in end-to-end speech recognition. However these models have only used shallow acoustic encoder networks. In our work, we successively train very deep convolutional networks to add more…

Computation and Language · Computer Science 2016-10-11 Yu Zhang , William Chan , Navdeep Jaitly

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

Recently, pioneer work finds that speech pre-trained models can solve full-stack speech processing tasks, because the model utilizes bottom layers to learn speaker-related information and top layers to encode content-related information.…

Audio and Speech Processing · Electrical Eng. & Systems 2021-12-17 Chengyi Wang , Yu Wu , Sanyuan Chen , Shujie Liu , Jinyu Li , Yao Qian , Zhenglu Yang

Despite the significant progress in end-to-end (E2E) automatic speech recognition (ASR), E2E ASR for low resourced code-switching (CS) speech has not been well studied. In this work, we describe an E2E ASR pipeline for the recognition of CS…

Computation and Language · Computer Science 2019-10-01 Xianghu Yue , Grandee Lee , Emre Yılmaz , Fang Deng , Haizhou Li

India is home to multiple languages, and training automatic speech recognition (ASR) systems for languages is challenging. Over time, each language has adopted words from other languages, such as English, leading to code-mixing. Most Indian…

Audio and Speech Processing · Electrical Eng. & Systems 2021-06-04 Mari Ganesh Kumar , Jom Kuriakose , Anand Thyagachandran , Arun Kumar A , Ashish Seth , Lodagala Durga Prasad , Saish Jaiswal , Anusha Prakash , Hema Murthy

Building an accurate automatic speech recognition (ASR) system requires a large dataset that contains many hours of labeled speech samples produced by a diverse set of speakers. The lack of such open free datasets is one of the main issues…

Computation and Language · Computer Science 2018-11-05 Jason Li , Ravi Gadde , Boris Ginsburg , Vitaly Lavrukhin

A new label smoothing method that makes use of prior knowledge of a language at human level, homophone, is proposed in this paper for automatic speech recognition (ASR). Compared with its forerunners, the proposed method uses pronunciation…

Audio and Speech Processing · Electrical Eng. & Systems 2020-05-15 Yi Zheng , Xianjie Yang , Xuyong Dang

End-to-end (E2E) automatic speech recognition (ASR) systems have revolutionized the field by integrating all components into a single neural network, with attention-based encoder-decoder models achieving state-of-the-art performance.…

Computation and Language · Computer Science 2025-07-01 Duygu Altinok

Automatic speech recognition (ASR) systems are primarily evaluated on transcription accuracy. However, in some use cases such as subtitling, verbatim transcription would reduce output readability given limited screen size and reading time.…

Computation and Language · Computer Science 2020-05-26 Danni Liu , Jan Niehues , Gerasimos Spanakis

Producing a large amount of annotated speech data for training ASR systems remains difficult for more than 95% of languages all over the world which are low-resourced. However, we note human babies start to learn the language by the sounds…

Computation and Language · Computer Science 2018-10-31 Yi-Chen Chen , Chia-Hao Shen , Sung-Feng Huang , Hung-yi Lee , Lin-shan Lee

Attention-based contextual biasing approaches have shown significant improvements in the recognition of generic and/or personal rare-words in End-to-End Automatic Speech Recognition (E2E ASR) systems like neural transducers. These…

Computation and Language · Computer Science 2023-05-10 Xuandi Fu , Kanthashree Mysore Sathyendra , Ankur Gandhe , Jing Liu , Grant P. Strimel , Ross McGowan , Athanasios Mouchtaris

In this paper, we apply Semi-Supervised Learning (SSL) along with Data Augmentation (DA) for improving the accuracy of End-to-End ASR. We focus on the consistency regularization principle, which has been successfully applied to image…

Audio and Speech Processing · Electrical Eng. & Systems 2020-07-29 Felix Weninger , Franco Mana , Roberto Gemello , Jesús Andrés-Ferrer , Puming Zhan

Automatic speech recognition (ASR) systems often encounter difficulties in accurately recognizing rare words, leading to errors that can have a negative impact on downstream tasks such as keyword spotting, intent detection, and text…

Artificial Intelligence · Computer Science 2023-10-10 Jiajun He , Zekun Yang , Tomoki Toda

In automatic speech recognition (ASR) what a user says depends on the particular context she is in. Typically, this context is represented as a set of word n-grams. In this work, we present a novel, all-neural, end-to-end (E2E) ASR sys- tem…

Audio and Speech Processing · Electrical Eng. & Systems 2018-08-09 Golan Pundak , Tara N. Sainath , Rohit Prabhavalkar , Anjuli Kannan , Ding Zhao