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This work presents a seemingly simple but effective technique to improve low-resource ASR systems for phonetic languages. By identifying sets of acoustically similar graphemes in these languages, we first reduce the output alphabet of the…

Audio and Speech Processing · Electrical Eng. & Systems 2021-09-13 Anuj Diwan , Preethi Jyothi

Automatic speech recognition (ASR) has made remarkable progress but heavily relies on large-scale labeled data, which is scarce for low-resource languages like Vietnamese. While existing systems such as Whisper, USM, and MMS achieve…

Audio and Speech Processing · Electrical Eng. & Systems 2025-05-30 Jianheng Zhuo , Yifan Yang , Yiwen Shao , Yong Xu , Dong Yu , Kai Yu , Xie Chen

In this paper, we propose a three-stage training methodology to improve the speech recognition accuracy of low-resource languages. We explore and propose an effective combination of techniques such as transfer learning, encoder freezing,…

Audio and Speech Processing · Electrical Eng. & Systems 2021-11-22 Jiyeon Kim , Mehul Kumar , Dhananjaya Gowda , Abhinav Garg , Chanwoo Kim

Speech-enabled systems typically first convert audio to text through an automatic speech recognition (ASR) model and then feed the text to downstream natural language processing (NLP) modules. The errors of the ASR system can seriously…

Computation and Language · Computer Science 2021-03-26 Tong Cui , Jinghui Xiao , Liangyou Li , Xin Jiang , Qun Liu

In this work we evaluate the utility of synthetic data for training automatic speech recognition (ASR). We use the ASR training data to train a text-to-speech (TTS) system similar to FastSpeech-2. With this TTS we reproduce the original…

Computation and Language · Computer Science 2024-10-29 Benedikt Hilmes , Nick Rossenbach , and Ralf Schlüter

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 2019-04-11 Yi-Chen Chen , Sung-Feng Huang , Hung-yi Lee , Lin-shan Lee

Automatic speech recognition (ASR) for conversational code-switching speech remains challenging due to the scarcity of realistic, high-quality labeled speech data. This paper explores multilingual text-to-speech (TTS) models as an effective…

Audio and Speech Processing · Electrical Eng. & Systems 2026-01-06 Yue Heng Yeo , Yuchen Hu , Shreyas Gopal , Yizhou Peng , Hexin Liu , Eng Siong Chng

We propose an on-the-fly data augmentation method for automatic speech recognition (ASR) that uses alignment information to generate effective training samples. Our method, called Aligned Data Augmentation (ADA) for ASR, replaces…

Computation and Language · Computer Science 2023-06-13 Tsz Kin Lam , Mayumi Ohta , Shigehiko Schamoni , Stefan Riezler

Off-the-shelf pre-trained Automatic Speech Recognition (ASR) systems are an increasingly viable service for companies of any size building speech-based products. While these ASR systems are trained on large amounts of data, domain mismatch…

Audio and Speech Processing · Electrical Eng. & Systems 2020-03-18 Anirudh Mani , Shruti Palaskar , Nimshi Venkat Meripo , Sandeep Konam , Florian Metze

Deep biasing improves automatic speech recognition (ASR) performance by incorporating contextual phrases. However, most existing methods enhance subwords in a contextual phrase as independent units, potentially compromising contextual…

Sound · Computer Science 2025-05-30 Zhennan Lin , Kaixun Huang , Wei Ren , Linju Yang , Lei Xie

With computers getting more and more powerful and integrated in our daily lives, the focus is increasingly shifting towards more human-friendly interfaces, making Automatic Speech Recognition (ASR) a central player as the ideal means of…

Sound · Computer Science 2021-01-25 Dennis Pinto , Jose-María Arnau , Antonio González

This paper presents a method for selecting appropriate synthetic speech samples from a given large text-to-speech (TTS) dataset as supplementary training data for an automatic speech recognition (ASR) model. We trained a neural network,…

Audio and Speech Processing · Electrical Eng. & Systems 2023-06-05 Shuo Liu , Leda Sarı , Chunyang Wu , Gil Keren , Yuan Shangguan , Jay Mahadeokar , Ozlem Kalinli

Automatic Speech Recognition (ASR) has increased in popularity in recent years. The evolution of processor and storage technologies has enabled more advanced ASR mechanisms, fueling the development of virtual assistants such as Amazon…

Audio and Speech Processing · Electrical Eng. & Systems 2024-12-04 Sebastian Baunsgaard , Sebastian B. Wrede , Pınar Tozun

Automatic Speech Recognition (ASR) aims to convert human speech content into corresponding text. In conversational scenarios, effectively utilizing context can enhance its accuracy. Large Language Models' (LLMs) exceptional long-context…

Sound · Computer Science 2026-01-19 Bingshen Mu , Hexin Liu , Hongfei Xue , Kun Wei , Lei Xie

Despite the rapid progress of automatic speech recognition (ASR) technologies in the past few decades, recognition of disordered speech remains a highly challenging task to date. Disordered speech presents a wide spectrum of challenges to…

Audio and Speech Processing · Electrical Eng. & Systems 2022-03-01 Shansong Liu , Mengzhe Geng , Shoukang Hu , Xurong Xie , Mingyu Cui , Jianwei Yu , Xunying Liu , Helen Meng

The pervasiveness of intra-utterance code-switching (CS) in spoken content requires that speech recognition (ASR) systems handle mixed language. Designing a CS-ASR system has many challenges, mainly due to data scarcity, grammatical…

Computation and Language · Computer Science 2023-01-12 Amir Hussein , Shammur Absar Chowdhury , Ahmed Abdelali , Najim Dehak , Ahmed Ali , Sanjeev Khudanpur

Automatic Speech Recognition (ASR) has reached impressive accuracy for high-resource languages, yet its utility in linguistic fieldwork remains limited. Recordings collected in fieldwork contexts present unique challenges, including…

Computation and Language · Computer Science 2025-06-25 Siyu Liang , Gina-Anne Levow

One of the central skills that language learners need to practice is speaking the language. Currently, students in school do not get enough speaking opportunities and lack conversational practice. Recent advances in speech technology and…

Computation and Language · Computer Science 2024-06-06 Janick Michot , Manuela Hürlimann , Jan Deriu , Luzia Sauer , Katsiaryna Mlynchyk , Mark Cieliebak

End-to-end automatic speech recognition (ASR), unlike conventional ASR, does not have modules to learn the semantic representation from speech encoder. Moreover, the higher frame-rate of speech representation prevents the model to learn the…

Artificial Intelligence · Computer Science 2021-03-19 Md Akmal Haidar , Chao Xing , Mehdi Rezagholizadeh

This study investigates the impact of integrating a dataset of disordered speech recordings ($\sim$1,000 hours) into the fine-tuning of a near state-of-the-art ASR baseline system. Contrary to what one might expect, despite the data being…

Audio and Speech Processing · Electrical Eng. & Systems 2025-12-22 Jimmy Tobin , Katrin Tomanek , Subhashini Venugopalan