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We present state-of-the-art automatic speech recognition (ASR) systems employing a standard hybrid DNN/HMM architecture compared to an attention-based encoder-decoder design for the LibriSpeech task. Detailed descriptions of the system…

Computation and Language · Computer Science 2019-10-02 Christoph Lüscher , Eugen Beck , Kazuki Irie , Markus Kitza , Wilfried Michel , Albert Zeyer , Ralf Schlüter , Hermann Ney

Automatic speech recognition (ASR) has advanced in high-resource languages, but most of the world's 7,000+ languages remain unsupported, leaving thousands of long-tail languages behind. Expanding ASR coverage has been costly and limited by…

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

Whisper's robust performance in automatic speech recognition (ASR) is often attributed to its massive 680k-hour training set, an impractical scale for most researchers. In this work, we examine how linguistic and acoustic diversity in…

Computation and Language · Computer Science 2025-05-28 Dancheng Liu , Amir Nassereldine , Chenhui Xu , Jinjun Xiong

Although end-to-end automatic speech recognition (E2E ASR) has achieved great performance in tasks that have numerous paired data, it is still challenging to make E2E ASR robust against noisy and low-resource conditions. In this study, we…

Audio and Speech Processing · Electrical Eng. & Systems 2021-06-08 Emiru Tsunoo , Kentaro Shibata , Chaitanya Narisetty , Yosuke Kashiwagi , Shinji Watanabe

Sequence-to-sequence attention-based models integrate an acoustic, pronunciation and language model into a single neural network, which make them very suitable for multilingual automatic speech recognition (ASR). In this paper, we are…

Audio and Speech Processing · Electrical Eng. & Systems 2018-06-15 Shiyu Zhou , Shuang Xu , Bo Xu

Self-supervised representation learning (SSRL) has demonstrated superior performance than supervised models for tasks including phoneme recognition. Training SSRL models poses a challenge for low-resource languages where sufficient…

Audio and Speech Processing · Electrical Eng. & Systems 2024-07-02 Asad Ullah , Alessandro Ragano , Andrew Hines

In recent years, automatic speech recognition (ASR) systems have significantly improved, especially in languages with a vast amount of transcribed speech data. However, ASR systems tend to perform poorly for low-resource languages with…

Computation and Language · Computer Science 2024-06-04 Ara Yeroyan , Nikolay Karpov

Multilingual automatic speech recognition (ASR) systems mostly benefit low resource languages but suffer degradation in performance across several languages relative to their monolingual counterparts. Limited studies have focused on…

Computation and Language · Computer Science 2022-07-08 Muhammad Umar Farooq , Thomas Hain

Multilingual automatic speech recognition (ASR) in the medical domain serves as a foundational task for various downstream applications such as speech translation, spoken language understanding, and voice-activated assistants. This…

Computation and Language · Computer Science 2025-05-16 Khai Le-Duc , Phuc Phan , Tan-Hanh Pham , Bach Phan Tat , Minh-Huong Ngo , Chris Ngo , Thanh Nguyen-Tang , Truong-Son Hy

Training speech recognizers with unpaired speech and text -- known as unsupervised speech recognition (UASR) -- is a crucial step toward extending ASR to low-resource languages in the long-tail distribution and enabling multimodal learning…

Computation and Language · Computer Science 2025-10-07 Liming Wang , Junrui Ni , Kai-Wei Chang , Saurabhchand Bhati , David Harwath , Mark Hasegawa-Johnson , James R. Glass

This paper reports on the semi-supervised development of acoustic and language models for under-resourced, code-switched speech in five South African languages. Two approaches are considered. The first constructs four separate bilingual…

Audio and Speech Processing · Electrical Eng. & Systems 2020-03-09 Astik Biswas , Emre Yılmaz , Febe de Wet , Ewald van der Westhuizen , Thomas Niesler

Speech Recognition (ASR) due to phoneme distortions and high variability. While self-supervised ASR models like Wav2Vec, HuBERT, and Whisper have shown promise, their effectiveness in dysarthric speech remains unclear. This study…

Sound · Computer Science 2025-08-12 Ahmed Aboeitta , Ahmed Sharshar , Youssef Nafea , Shady Shehata

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

We introduce the Universal Speech Model (USM), a single large model that performs automatic speech recognition (ASR) across 100+ languages. This is achieved by pre-training the encoder of the model on a large unlabeled multilingual dataset…

This paper describes the results of an informal collaboration launched during the African Master of Machine Intelligence (AMMI) in June 2020. After a series of lectures and labs on speech data collection using mobile applications and on…

Sound · Computer Science 2021-03-17 Jama Hussein Mohamud , Lloyd Acquaye Thompson , Aissatou Ndoye , Laurent Besacier

The problem of data sparsity has long been a challenge in recommendation systems, and previous studies have attempted to address this issue by incorporating side information. However, this approach often introduces side effects such as…

Information Retrieval · Computer Science 2024-01-09 Wei Wei , Xubin Ren , Jiabin Tang , Qinyong Wang , Lixin Su , Suqi Cheng , Junfeng Wang , Dawei Yin , Chao Huang

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

This paper describes a new baseline system for automatic speech recognition (ASR) in the CHiME-4 challenge to promote the development of noisy ASR in speech processing communities by providing 1) state-of-the-art system with a simplified…

Sound · Computer Science 2018-03-28 Szu-Jui Chen , Aswin Shanmugam Subramanian , Hainan Xu , Shinji Watanabe

Hybrid automatic speech recognition (ASR) models are typically sequentially trained with CTC or LF-MMI criteria. However, they have vastly different legacies and are usually implemented in different frameworks. In this paper, by decoupling…

Audio and Speech Processing · Electrical Eng. & Systems 2021-09-28 Xiaohui Zhang , Vimal Manohar , David Zhang , Frank Zhang , Yangyang Shi , Nayan Singhal , Julian Chan , Fuchun Peng , Yatharth Saraf , Mike Seltzer