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In this article, we present an approach for non native automatic speech recognition (ASR). We propose two methods to adapt existing ASR systems to the non-native accents. The first method is based on the modification of acoustic models…

Computation and Language · Computer Science 2007-11-08 Ghazi Bouselmi , Dominique Fohr , Irina Illina , Jean-Paul Haton

Code-switching (CS), the alternation between two or more languages within a single conversation, presents significant challenges for automatic speech recognition (ASR) systems. Existing Mandarin-English code-switching datasets often suffer…

Computation and Language · Computer Science 2025-03-13 Jiaming Zhou , Yujie Guo , Shiwan Zhao , Haoqin Sun , Hui Wang , Jiabei He , Aobo Kong , Shiyao Wang , Xi Yang , Yequan Wang , Yonghua Lin , Yong Qin

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

Phonetic speech transcription is crucial for fine-grained linguistic analysis and downstream speech applications. While Connectionist Temporal Classification (CTC) is a widely used approach for such tasks due to its efficiency, it often…

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

Code-switching (CS) refers to a linguistic phenomenon where a speaker uses different languages in an utterance or between alternating utterances. In this work, we study end-to-end (E2E) approaches to the Mandarin-English code-switching…

Computation and Language · Computer Science 2019-07-12 Zhiping Zeng , Yerbolat Khassanov , Van Tung Pham , Haihua Xu , Eng Siong Chng , Haizhou Li

Generating speech across different accents while preserving speaker identity is crucial for various real-world applications. However, accurately and independently modeling both speaker and accent characteristics in text-to-speech (TTS)…

Audio and Speech Processing · Electrical Eng. & Systems 2025-01-03 Xuehao Zhou , Mingyang Zhang , Yi Zhou , Zhizheng Wu , Haizhou Li

Phoneme-based ASR factorizes recognition into speech-to-phoneme (S2P) and phoneme-to-grapheme (P2G), enabling cross-lingual acoustic sharing while keeping language-specific orthography in a separate module. While large language models…

Audio and Speech Processing · Electrical Eng. & Systems 2026-04-01 Lukuang Dong , Ziwei Li , Saierdaer Yusuyin , Xianyu Zhao , Zhijian Ou

Recent state-of-the-art neural text-to-speech (TTS) synthesis models have dramatically improved intelligibility and naturalness of generated speech from text. However, building a good bilingual or code-switched TTS for a particular voice is…

Sound · Computer Science 2020-10-19 Shengkui Zhao , Trung Hieu Nguyen , Hao Wang , Bin Ma

Automatic Speech Recognition (ASR) has achieved remarkable success with deep learning, driving advancements in conversational artificial intelligence, media transcription, and assistive technologies. However, ASR systems still struggle in…

Sound · Computer Science 2026-03-17 Haoyuan Yang , Yue Zhang , Liqiang Jing , John H. L. Hansen

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

In recent years, the evolution of end-to-end (E2E) automatic speech recognition (ASR) models has been remarkable, largely due to advances in deep learning architectures like transformer. On top of E2E systems, researchers have achieved…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-12 Shiyi Han , Zhihong Lei , Mingbin Xu , Xingyu Na , Zhen Huang

Recently, Automatic Speech Recognition (ASR), a system that converts audio into text, has caught a lot of attention in the machine learning community. Thus, a lot of publicly available models were released in HuggingFace. However, most of…

Automatic Speech Recognition (ASR) is greatly developed in recent years, which expedites many applications on other fields. For the ASR research, speech corpus is always an essential foundation, especially for the vertical industry, such as…

Computation and Language · Computer Science 2021-02-17 Bo Yang , Xianlong Tan , Zhengmao Chen , Bing Wang , Dan Li , Zhongping Yang , Xiping Wu , Yi Lin

Code-switching (CS) phenomenon occurs when words or phrases from different languages are alternated in a single sentence. Due to data scarcity, building an effective CS Automatic Speech Recognition (ASR) system remains challenging. In this…

Audio and Speech Processing · Electrical Eng. & Systems 2024-09-23 Yu Xi , Wen Ding , Kai Yu , Junjie Lai

Low-resource automatic speech recognition (ASR) continues to pose significant challenges, primarily due to the limited availability of transcribed data for numerous languages. While a wealth of spoken content is accessible in television…

Audio and Speech Processing · Electrical Eng. & Systems 2026-02-26 Cheng-Yeh Yang , Chien-Chun Wang , Li-Wei Chen , Hung-Shin Lee , Hsin-Min Wang , Berlin Chen

Code-switching (CS) refers to the switching of languages within a speech signal and results in language confusion for automatic speech recognition (ASR). To address language confusion, we propose a language alignment loss (LAL) that aligns…

Audio and Speech Processing · Electrical Eng. & Systems 2025-11-04 Hexin Liu , Xiangyu Zhang , Haoyang Zhang , Leibny Paola Garcia , Andy W. H. Khong , Eng Siong Chng , Shinji Watanabe

The kNN-CTC model has proven to be effective for monolingual automatic speech recognition (ASR). However, its direct application to multilingual scenarios like code-switching, presents challenges. Although there is potential for performance…

Computation and Language · Computer Science 2025-01-20 Jiaming Zhou , Shiwan Zhao , Hui Wang , Tian-Hao Zhang , Haoqin Sun , Xuechen Wang , Yong Qin

The choice of modeling units is critical to automatic speech recognition (ASR) tasks. Conventional ASR systems typically choose context-dependent states (CD-states) or context-dependent phonemes (CD-phonemes) as their modeling units.…

Audio and Speech Processing · Electrical Eng. & Systems 2018-05-22 Shiyu Zhou , Linhao Dong , Shuang Xu , Bo Xu

Transformer based end-to-end modelling approaches with multiple stream inputs have been achieved great success in various automatic speech recognition (ASR) tasks. An important issue associated with such approaches is that the intermediate…

Audio and Speech Processing · Electrical Eng. & Systems 2022-07-11 Jin Li , Rongfeng Su , Xurong Xie , Nan Yan , Lan Wang