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We propose a test-time defense mechanism against adversarial attacks: imperceptible image perturbations that significantly alter the predictions of a model. Unlike existing methods that rely on feature filtering or smoothing, which can lead…

Computer Vision and Pattern Recognition · Computer Science 2025-10-06 Dong Lao , Yuxiang Zhang , Haniyeh Ehsani Oskouie , Yangchao Wu , Alex Wong , Stefano Soatto

Robustness of huge Transformer-based models for natural language processing is an important issue due to their capabilities and wide adoption. One way to understand and improve robustness of these models is an exploration of an adversarial…

Machine learning is a powerful tool enabling full automation of a huge number of tasks without explicit programming. Despite recent progress of machine learning in different domains, these models have shown vulnerabilities when they are…

Machine Learning · Computer Science 2026-03-27 Mohammad Meymani , Roozbeh Razavi-Far

Adversarial attacks have been expanded to speaker recognition (SR). However, existing attacks are often assessed using different SR models, recognition tasks and datasets, and only few adversarial defenses borrowed from computer vision are…

Cryptography and Security · Computer Science 2021-09-07 Guangke Chen , Zhe Zhao , Fu Song , Sen Chen , Lingling Fan , Yang Liu

Speech enhancement is an essential task of improving speech quality in noise scenario. Several state-of-the-art approaches have introduced visual information for speech enhancement,since the visual aspect of speech is essentially unaffected…

Audio and Speech Processing · Electrical Eng. & Systems 2022-04-21 Xinmeng Xu , Yang Wang , Dongxiang Xu , Yiyuan Peng , Cong Zhang , Jie Jia , Binbin Chen

Integrated Speech and Large Language Models (SLMs) that can follow speech instructions and generate relevant text responses have gained popularity lately. However, the safety and robustness of these models remains largely unclear. In this…

Audio deepfakes pose significant threats, including impersonation, fraud, and reputation damage. To address these risks, audio deepfake detection (ADD) techniques have been developed, demonstrating success on benchmarks like ASVspoof2019.…

Sound · Computer Science 2025-01-22 Muhammad Umar Farooq , Awais Khan , Kutub Uddin , Khalid Mahmood Malik

In this paper, we propose an enhanced triplet method that improves the encoding process of embeddings by jointly utilizing generative adversarial mechanism and multitasking optimization. We extend our triplet encoder with Generative…

Sound · Computer Science 2018-03-28 Wenhao Ding , Liang He

Automatic speaker verification (ASV) is one of the core technologies in biometric identification. With the ubiquitous usage of ASV systems in safety-critical applications, more and more malicious attackers attempt to launch adversarial…

Audio and Speech Processing · Electrical Eng. & Systems 2021-02-16 Haibin Wu , Xu Li , Andy T. Liu , Zhiyong Wu , Helen Meng , Hung-yi Lee

Speech enhancement aims to obtain speech signals with high intelligibility and quality from noisy speech. Recent work has demonstrated the excellent performance of time-domain deep learning methods, such as Conv-TasNet. However, these…

Sound · Computer Science 2021-09-21 Feiyang Xiao , Jian Guan , Qiuqiang Kong , Wenwu Wang

Classical parametric speech coding techniques provide a compact representation for speech signals. This affords a very low transmission rate but with a reduced perceptual quality of the reconstructed signals. Recently, autoregressive deep…

Audio and Speech Processing · Electrical Eng. & Systems 2019-07-02 Ahmed Mustafa , Arijit Biswas , Christian Bergler , Julia Schottenhamml , Andreas Maier

This paper investigates the use of generative adversarial network (GAN)-based models for converting the spectrogram of a speech signal into that of a singing one, without reference to the phoneme sequence underlying the speech. This is…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-06 Da-Yi Wu , Yi-Hsuan Yang

Adversarial examples to speaker recognition (SR) systems are generated by adding a carefully crafted noise to the speech signal to make the system fail while being imperceptible to humans. Such attacks pose severe security risks, making it…

Audio and Speech Processing · Electrical Eng. & Systems 2024-10-28 Sonal Joshi , Jesús Villalba , Piotr Żelasko , Laureano Moro-Velázquez , Najim Dehak

Adversarial attacks have always been a serious threat for any data-driven model. In this paper, we explore subspaces of adversarial examples in unitary vector domain, and we propose a novel detector for defending our models trained for…

Machine Learning · Computer Science 2019-10-29 Mohammad Esmaeilpour , Patrick Cardinal , Alessandro Lameiras Koerich

Inferring the latent variable generating a given test sample is a challenging problem in Generative Adversarial Networks (GANs). In this paper, we propose InvGAN - a novel framework for solving the inference problem in GANs, which involves…

Machine Learning · Computer Science 2019-12-02 Wei-An Lin , Yogesh Balaji , Pouya Samangouei , Rama Chellappa

Security alignment enables the Large Language Model (LLM) to gain the protection against malicious queries, but various jailbreak attack methods reveal the vulnerability of this security mechanism. Previous studies have isolated LLM…

Cryptography and Security · Computer Science 2025-08-07 Xiaohu Li , Yunfeng Ning , Zepeng Bao , Mayi Xu , Jianhao Chen , Tieyun Qian

Lately, the self-attention mechanism has marked a new milestone in the field of automatic speech recognition (ASR). Nevertheless, its performance is susceptible to environmental intrusions as the system predicts the next output symbol…

Audio and Speech Processing · Electrical Eng. & Systems 2021-04-06 Lujun Li , Yikai Kang , Yuchen Shi , Ludwig Kürzinger , Tobias Watzel , Gerhard Rigoll

Speech bandwidth expansion is crucial for expanding the frequency range of low-bandwidth speech signals, thereby improving audio quality, clarity and perceptibility in digital applications. Its applications span telephony, compression,…

Sound · Computer Science 2024-07-30 Mahmoud Salhab , Haidar Harmanani

Deep learning has become a standard approach for the modeling of audio effects, yet strictly black-box modeling remains problematic for time-varying systems. Unlike time-invariant effects, training models on devices with internal modulation…

Sound · Computer Science 2025-12-18 Yann Bourdin , Pierrick Legrand , Fanny Roche

Generative Adversarial Networks (GANs) have made releasing of synthetic images a viable approach to share data without releasing the original dataset. It has been shown that such synthetic data can be used for a variety of downstream tasks…

Machine Learning · Computer Science 2020-12-15 Sumit Mukherjee , Yixi Xu , Anusua Trivedi , Juan Lavista Ferres