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Automatic Speech Recognition (ASR) is the interdisciplinary subfield of computational linguistics that develops methodologies and technologies that enables the recognition and translation of spoken language into text by computers. It…

Audio and Speech Processing · Electrical Eng. & Systems 2020-04-09 Rachit Shukla

Automated speaking assessment (ASA) typically involves automatic speech recognition (ASR) and hand-crafted feature extraction from the ASR transcript of a learner's speech. Recently, self-supervised learning (SSL) has shown stellar…

Sound · Computer Science 2025-03-04 Tien-Hong Lo , Fu-An Chao , Tzu-I Wu , Yao-Ting Sung , Berlin Chen

Contextual biasing improves automatic speech recognition (ASR) by integrating external knowledge, such as user-specific phrases or entities, during decoding. In this work, we use an attention-based biasing decoder to produce scores for…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-29 Wanting Huang , Weiran Wang

We propose a theoretical framework for thinking about score normalization, which confirms that normalization is not needed under (admittedly fragile) ideal conditions. If, however, these conditions are not met, e.g. under data-set shift…

Machine Learning · Statistics 2017-09-29 Albert Swart , Niko Brummer

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

An automatic speech recognition (ASR) system based on a deep neural network is vulnerable to attack by an adversarial example, especially if the command-dependent ASR fails. A defense method against adversarial examples is proposed to…

Sound · Computer Science 2021-10-19 Mingyu Dong , Diqun Yan , Yongkang Gong , Rangding Wang

End-to-end (E2E) Automatic Speech Recognition (ASR) models are trained using paired audio-text samples that are expensive to obtain, since high-quality ground-truth data requires human annotators. Voice search applications, such as digital…

Computation and Language · Computer Science 2025-06-09 Christophe Van Gysel , Maggie Wu , Lyan Verwimp , Caglar Tirkaz , Marco Bertola , Zhihong Lei , Youssef Oualil

Supervised training of speech recognition models requires access to transcribed audio data, which often is not possible due to confidentiality issues. Our approach to this problem is to generate synthetic audio from a text-only corpus using…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-01 Yanis Perrin , Gilles Boulianne

Reverberation negatively impacts the performance of automatic speech recognition (ASR). Prior work on quantifying the effect of reverberation has shown that clarity (C50), a parameter that can be estimated from the acoustic impulse…

Audio and Speech Processing · Electrical Eng. & Systems 2020-02-17 Hannes Gamper , Dimitra Emmanouilidou , Sebastian Braun , Ivan J. Tashev

We present an approach to reduce the performance disparity between geographic regions without degrading performance on the overall user population for ASR. A popular approach is to fine-tune the model with data from regions where the ASR…

Audio and Speech Processing · Electrical Eng. & Systems 2024-02-09 Viet Anh Trinh , Pegah Ghahremani , Brian King , Jasha Droppo , Andreas Stolcke , Roland Maas

Multilingual models can improve language processing, particularly for low resource situations, by sharing parameters across languages. Multilingual acoustic models, however, generally ignore the difference between phonemes (sounds that can…

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

Producing a large annotated speech corpus for training ASR systems remains difficult for more than 95% of languages all over the world which are low-resourced, but collecting a relatively big unlabeled data set for such languages is more…

Computation and Language · Computer Science 2019-08-26 Kuan-Yu Chen , Che-Ping Tsai , Da-Rong Liu , Hung-Yi Lee , Lin-shan Lee

Automatic speech recognition (ASR) is a crucial tool for linguists aiming to perform a variety of language documentation tasks. However, modern ASR systems use data-hungry transformer architectures, rendering them generally unusable for…

Computation and Language · Computer Science 2025-10-09 Massimo Daul , Alessio Tosolini , Claire Bowern

Automatic speech recognition (ASR) systems often degrade on accented speech because acoustic-phonetic and prosodic shifts induce a mismatch to training data, making labeled accent adaptation costly. However, common pseudo-label selection…

Computation and Language · Computer Science 2026-02-17 Ligong Lei , Wenwen Lu , Xudong Pang , Zaokere Kadeer , Aishan Wumaier

Many speech enhancement methods try to learn the relationship between noisy and clean speech, obtained using an acoustic room simulator. We point out several limitations of enhancement methods relying on clean speech targets; the goal of…

Computation and Language · Computer Science 2018-12-26 Geonmin Kim , Hwaran Lee , Bo-Kyeong Kim , Sang-Hoon Oh , Soo-Young Lee

Large-scale ASR models have achieved remarkable gains in accuracy and robustness. However, fairness issues remain largely unaddressed despite their critical importance in real-world applications. In this work, we introduce FairASR, a system…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-13 Jongsuk Kim , Jaemyung Yu , Minchan Kwon , Junmo Kim

This paper presents a novel optimization framework for automatic speech recognition (ASR) with the aim of reducing hallucinations produced by an ASR model. The proposed framework optimizes the ASR model to maximize an expected factual…

Audio and Speech Processing · Electrical Eng. & Systems 2023-02-27 Naoyuki Kanda , Takuya Yoshioka , Yang Liu

In this paper, we introduce a new and simple method for comparing speech utterances without relying on text transcripts. Our speech-to-speech comparison metric utilizes state-of-the-art speech2unit encoders like HuBERT to convert speech…

Computation and Language · Computer Science 2023-07-21 Laurent Besacier , Swen Ribeiro , Olivier Galibert , Ioan Calapodescu

The interest in employing automatic speech recognition (ASR) in applications for reading practice has been growing in recent years. In a previous study, we presented an ASR-based Dutch reading tutor application that was developed to provide…

Computation and Language · Computer Science 2024-07-24 Yu Bai , Cristian Tejedor-Garcia , Ferdy Hubers , Catia Cucchiarini , Helmer Strik