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This study addresses robust automatic speech recognition (ASR) by introducing a Conformer-based acoustic model. The proposed model builds on the wide residual bi-directional long short-term memory network (WRBN) with utterance-wise dropout…

Sound · Computer Science 2022-10-21 Yufeng Yang , Peidong Wang , DeLiang Wang

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

Speech super-resolution (SR) is the task that restores high-resolution speech from low-resolution input. Existing models employ simulated data and constrained experimental settings, which limit generalization to real-world SR. Predictive…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-26 Heming Wang , Eric W. Healy , DeLiang Wang

Speech disfluency commonly occurs in conversational and spontaneous speech. However, standard Automatic Speech Recognition (ASR) models struggle to accurately recognize these disfluencies because they are typically trained on fluent…

Computation and Language · Computer Science 2024-09-18 Robin Amann , Zhaolin Li , Barbara Bruno , Jan Niehues

While Automatic Speech Recognition has been shown to be vulnerable to adversarial attacks, defenses against these attacks are still lagging. Existing, naive defenses can be partially broken with an adaptive attack. In classification tasks,…

Computation and Language · Computer Science 2022-01-12 Raphael Olivier , Bhiksha Raj

Form about four decades human beings have been dreaming of an intelligent machine which can master the natural speech. In its simplest form, this machine should consist of two subsystems, namely automatic speech recognition (ASR) and speech…

Sound · Computer Science 2013-05-08 Urmila Shrawankar , V. M. Thakare

The combination of a deep neural network (DNN) -based speech enhancement (SE) front-end and an automatic speech recognition (ASR) back-end is a widely used approach to implement overlapping speech recognition. However, the SE front-end…

Audio and Speech Processing · Electrical Eng. & Systems 2022-06-17 Hiroshi Sato , Tsubasa Ochiai , Marc Delcroix , Keisuke Kinoshita , Naoyuki Kamo , Takafumi Moriya

This paper proposes an efficient attempt to noisy speech emotion recognition (NSER). Conventional NSER approaches have proven effective in mitigating the impact of artificial noise sources, such as white Gaussian noise, but are limited to…

Sound · Computer Science 2026-01-13 Xiaohan Shi , Jiajun He , Xingfeng Li , Tomoki Toda

Conventional speech enhancement technique such as beamforming has known benefits for far-field speech recognition. Our own work in frequency-domain multi-channel acoustic modeling has shown additional improvements by training a spatial…

Sound · Computer Science 2020-02-10 Taejin Park , Kenichi Kumatani , Minhua Wu , Shiva Sundaram

We study diffusion-based speech enhancement using a Schrodinger bridge formulation and extend the EDM2 framework to this setting. We employ time-dependent preconditioning of network inputs and outputs to stabilize training and explore two…

Audio and Speech Processing · Electrical Eng. & Systems 2026-01-30 Julius Richter , Danilo de Oliveira , Timo Gerkmann

Diffusion-based generative models have recently achieved remarkable results in speech and vocal enhancement due to their ability to model complex speech data distributions. While these models generalize well to unseen acoustic environments,…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-23 Yudong Yang , Zhan Liu , Wenyi Yu , Guangzhi Sun , Qiuqiang Kong , Chao Zhang

We present our experiments in training robust to noise an end-to-end automatic speech recognition (ASR) model using intensive data augmentation. We explore the efficacy of fine-tuning a pre-trained model to improve noise robustness, and we…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-27 Jagadeesh Balam , Jocelyn Huang , Vitaly Lavrukhin , Slyne Deng , Somshubra Majumdar , Boris Ginsburg

Diffusion-based generative models have had a high impact on the computer vision and speech processing communities these past years. Besides data generation tasks, they have also been employed for data restoration tasks like speech…

Audio and Speech Processing · Electrical Eng. & Systems 2023-03-17 Jean-Marie Lemercier , Julius Richter , Simon Welker , Timo Gerkmann

For multi-channel speech recognition, speech enhancement techniques such as denoising or dereverberation are conventionally applied as a front-end processor. Deep learning-based front-ends using such techniques require aligned clean and…

Sound · Computer Science 2020-07-28 Hyeongju Kim , Hyeonseung Lee , Woo Hyun Kang , Hyung Yong Kim , Nam Soo Kim

In this work, we introduce a simple yet efficient post-processing model for automatic speech recognition (ASR). Our model has Transformer-based encoder-decoder architecture which "translates" ASR model output into grammatically and…

Computation and Language · Computer Science 2019-10-24 Oleksii Hrinchuk , Mariya Popova , Boris Ginsburg

Automatic speech recognition (ASR) systems often falter while processing stuttering-related disfluencies -- such as involuntary blocks and word repetitions -- yielding inaccurate transcripts. A critical barrier to progress is the scarcity…

Audio and Speech Processing · Electrical Eng. & Systems 2024-10-03 Dena Mujtaba , Nihar R. Mahapatra , Megan Arney , J. Scott Yaruss , Caryn Herring , Jia Bin

Multimodal speech recognition aims to improve the performance of automatic speech recognition (ASR) systems by leveraging additional visual information that is usually associated to the audio input. While previous approaches make crucial…

Sound · Computer Science 2022-04-29 Dan Oneata , Horia Cucu

This paper presents a speech intelligibility model based on automatic speech recognition (ASR), combining phoneme probabilities from deep neural networks (DNN) and a performance measure that estimates the word error rate from these…

Current flow-based generative speech enhancement methods learn curved probability paths which model a mapping between clean and noisy speech. Despite impressive performance, the implications of curved probability paths are unknown. Methods…

Sound · Computer Science 2025-08-29 Mattias Cross , Anton Ragni

Denoising diffusion models have recently emerged as a powerful class of generative models. They provide state-of-the-art results, not only for unconditional simulation, but also when used to solve conditional simulation problems arising in…

Machine Learning · Statistics 2022-06-28 Yuyang Shi , Valentin De Bortoli , George Deligiannidis , Arnaud Doucet