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This paper proposes a flexible multichannel speech enhancement system with the main goal of improving robustness of automatic speech recognition (ASR) in noisy conditions. The proposed system combines a flexible neural mask estimator…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-10 Ante Jukić , Jagadeesh Balam , Boris Ginsburg

Integrating large language models (LLMs) into automatic speech recognition (ASR) has become a mainstream paradigm in recent years. Although existing LLM-based ASR models demonstrate impressive performance on public benchmarks, their…

Audio and Speech Processing · Electrical Eng. & Systems 2026-04-21 Yuan Xie , Jiaqi Song , Guang Qiu , Xianliang Wang , Kai Qiao , Junfeng Yuan , Shengqing Liu , Yi Zhang , Bowen Chen , Ming Lei , Jie Gao , Jie Wu

Language models play a central role in automatic speech recognition (ASR), yet most methods rely on text-only models unaware of ASR error patterns. Recently, large language models (LLMs) have been applied to ASR correction, but introduce…

Machine Learning · Computer Science 2026-03-18 Zijin Gu , Tatiana Likhomanenko , He Bai , Erik McDermott , Ronan Collobert , Navdeep Jaitly

Single-channel speech enhancement approaches do not always improve automatic recognition rates in the presence of noise, because they can introduce distortions unhelpful for recognition. Following a trend towards end-to-end training of…

Sound · Computer Science 2021-12-14 Peter Plantinga , Deblin Bagchi , Eric Fosler-Lussier

We propose Shallow Flow Matching (SFM), a novel mechanism that enhances flow matching (FM)-based text-to-speech (TTS) models within a coarse-to-fine generation paradigm. Unlike conventional FM modules, which use the coarse representations…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-24 Dong Yang , Yiyi Cai , Yuki Saito , Lixu Wang , Hiroshi Saruwatari

Single-word Automatic Speech Recognition (ASR) is a challenging task due to the lack of linguistic context and sensitivity to noise, pronunciation variation, and channel artifacts, especially in low-resource, communication-critical domains…

Sound · Computer Science 2026-01-30 Manali Sharma , Riya Naik , Buvaneshwari G

Non-autoregressive models greatly improve decoding speed over typical sequence-to-sequence models, but suffer from degraded performance. Infilling and iterative refinement models make up some of this gap by editing the outputs of a…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-28 Ethan A. Chi , Julian Salazar , Katrin Kirchhoff

Despite the prevalence of retrieval-augmented language models (RALMs), the seamless integration of these models with retrieval mechanisms to enhance performance in document-based tasks remains challenging. While some post-retrieval…

Computation and Language · Computer Science 2024-06-05 Chuankai Xu , Dongming Zhao , Bo Wang , Hanwen Xing

Audio-visual speech separation aims to isolate each speaker's clean voice from mixtures by leveraging visual cues such as lip movements and facial features. While visual information provides complementary semantic guidance, existing methods…

Sound · Computer Science 2025-10-13 Ke Xue , Rongfei Fan , Lixin , Dawei Zhao , Chao Zhu , Han Hu

This paper presents the contribution to the third 'CHiME' speech separation and recognition challenge including both front-end signal processing and back-end speech recognition. In the front-end, Multi-channel Wiener filter (MWF) is…

Sound · Computer Science 2015-09-22 Xiaofei Wang , Chao Wu , Pengyuan Zhang , Ziteng Wang , Yong Liu , Xu Li , Qiang Fu , Yonghong Yan

This work proposes an efficient method to enhance the quality of corrupted speech signals by leveraging both acoustic and visual cues. While existing diffusion-based approaches have demonstrated remarkable quality, their applicability is…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-14 Chaeyoung Jung , Suyeon Lee , Ji-Hoon Kim , Joon Son Chung

Although modern automatic speech recognition (ASR) systems can achieve high performance, they may produce errors that weaken readers' experience and do harm to downstream tasks. To improve the accuracy and reliability of ASR hypotheses, we…

Audio and Speech Processing · Electrical Eng. & Systems 2022-01-11 Jing Du , Shiliang Pu , Qinbo Dong , Chao Jin , Xin Qi , Dian Gu , Ru Wu , Hongwei Zhou

Conformers have recently been proposed as a promising modelling approach for automatic speech recognition (ASR), outperforming recurrent neural network-based approaches and transformers. Nevertheless, in general, the performance of these…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-25 Carlos Carvalho , Alberto Abad

Recent advances in deep learning have significantly improved multichannel speech enhancement algorithms, yet conventional training loss functions such as the scale-invariant signal-to-distortion ratio (SDR) may fail to preserve fine-grained…

Sound · Computer Science 2025-06-24 Nasser-Eddine Monir , Paul Magron , Romain Serizel

We propose a self-refining framework that enhances ASR performance with only unlabeled datasets. The process starts with an existing ASR model generating pseudo-labels on unannotated speech, which are then used to train a high-fidelity…

Computation and Language · Computer Science 2025-06-17 Cheng-Kang Chou , Chan-Jan Hsu , Ho-Lam Chung , Liang-Hsuan Tseng , Hsi-Chun Cheng , Yu-Kuan Fu , Kuan Po Huang , Hung-Yi Lee

Automatic speech recognition (ASR) is a relevant area in multiple settings because it provides a natural communication mechanism between applications and users. ASRs often fail in environments that use language specific to particular…

Audio and Speech Processing · Electrical Eng. & Systems 2021-02-16 Rafael Viana-Cámara , Mario Campos-Soberanis , Diego Campos-Sobrino

Advances in machine learning have made it possible to perform various text and speech processing tasks, such as automatic speech recognition (ASR), in an end-to-end (E2E) manner. E2E approaches utilizing pre-trained models are gaining…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-07 Yukiya Hono , Koh Mitsuda , Tianyu Zhao , Kentaro Mitsui , Toshiaki Wakatsuki , Kei Sawada

In a pipeline speech translation system, automatic speech recognition (ASR) system will transmit errors in recognition to the downstream machine translation (MT) system. A standard machine translation system is usually trained on parallel…

Computation and Language · Computer Science 2019-10-29 Qiao Cheng , Meiyuan Fang , Yaqian Han , Jin Huang , Yitao Duan

Speech enhancement (SE) improves degraded speech's quality, with generative models like flow matching gaining attention for their outstanding perceptual quality. However, the flow-based model requires multiple numbers of function…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-26 Jiahe Wang , Hongyu Wang , Wei Wang , Lei Yang , Chenda Li , Wangyou Zhang , Lufen Tan , Yanmin Qian

Language-queried audio source separation (LASS) focuses on separating sounds using textual descriptions of the desired sources. Current methods mainly use discriminative approaches, such as time-frequency masking, to separate target sounds…

Sound · Computer Science 2025-01-10 Yi Yuan , Xubo Liu , Haohe Liu , Mark D. Plumbley , Wenwu Wang