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Electrocardiogram (ECG) is the most crucial monitoring modality to diagnose cardiovascular events. Precise and automatic detection of abnormal ECG patterns is beneficial to both physicians and patients. In the automatic detection of…

Signal Processing · Electrical Eng. & Systems 2020-09-10 Naoki Nonaka , Jun Seita

The proposed system consists of a two-stage cascade. The first stage performs a rough heartbeat detection while the second stage refines the previous one, improving the temporal localization and also classifying the heartbeats into types S1…

Audio and Speech Processing · Electrical Eng. & Systems 2024-11-06 J. Torre-Cruz , D. Martinez-Munoz , N. Ruiz-Reyes , A. J. Munoz-Montoro , M. Puentes-Chiachio , F. J. Canadas-Quesada

Medical audio classification remains challenging due to low signal-to-noise ratios, subtle discriminative features, and substantial intra-class variability, often compounded by class imbalance and limited training data. Synthetic data…

Sound · Computer Science 2026-02-04 David McShannon , Anthony Mella , Nicholas Dietrich

Heart disease remains a leading cause of mortality worldwide. Auscultation, the process of listening to heart sounds, can be enhanced through computer-aided analysis using Phonocardiogram (PCG) signals. This paper presents a novel approach…

Sound · Computer Science 2024-06-11 Manas Madine

This paper proposes a framework based on deep convolutional neural networks (CNNs) for automatic heart sound classification using short-segments of individual heart beats. We design a 1D-CNN that directly learns features from raw…

Sound · Computer Science 2020-04-27 Fuad Noman , Chee-Ming Ting , Sh-Hussain Salleh , Hernando Ombao

Cardiac auscultation is one of the most cost-effective techniques used to detect and identify many heart conditions. Computer-assisted decision systems based on auscultation can support physicians in their decisions. Unfortunately, the…

Deep learning techniques have shown promising results in the automatic classification of respiratory sounds. However, accurately distinguishing these sounds in real-world noisy conditions remains challenging for clinical deployment. In…

Audio and Speech Processing · Electrical Eng. & Systems 2025-05-01 Jing-Tong Tzeng , Jeng-Lin Li , Huan-Yu Chen , Chun-Hsiang Huang , Chi-Hsin Chen , Cheng-Yi Fan , Edward Pei-Chuan Huang , Chi-Chun Lee

The use of deep learning for radio modulation recognition has become prevalent in recent years. This approach automatically extracts high-dimensional features from large datasets, facilitating the accurate classification of modulation…

Machine Learning · Computer Science 2023-11-08 Tao Chen , Shilian Zheng , Kunfeng Qiu , Luxin Zhang , Qi Xuan , Xiaoniu Yang

Flaw detection in non-destructive testing, especially in complex signals like ultrasonic data, has thus far relied heavily on the expertise and judgement of trained human inspectors. While automated systems have been used for a long time,…

Signal Processing · Electrical Eng. & Systems 2019-03-28 Iikka Virkkunen , Tuomas Koskinen , Oskari Jessen-Juhler , Jari Rinta-Aho

In this paper we present ensembles of classifiers for automated animal audio classification, exploiting different data augmentation techniques for training Convolutional Neural Networks (CNNs). The specific animal audio classification…

Machine Learning · Computer Science 2020-03-17 Loris Nanni , Gianluca Maguolo , Michelangelo Paci

Cardiovascular diseases (CVDs) are the leading cause of death worldwide, accounting for approximately 17.9 million deaths each year. Early detection is critical, creating a demand for accurate and inexpensive pre-screening methods. Deep…

Sound · Computer Science 2025-12-09 Milan Marocchi , Matthew Fynn , Kayapanda Mandana , Yue Rong

Deep learning has recently been applied to automatically classify the modulation categories of received radio signals without manual experience. However, training deep learning models requires massive volume of data. An insufficient…

Signal Processing · Electrical Eng. & Systems 2019-12-11 Liang Huang , Weijian Pan , You Zhang , LiPing Qian , Nan Gao , Yuan Wu

Data augmentation is an inexpensive way to increase training data diversity and is commonly achieved via transformations of existing data. For tasks such as classification, there is a good case for learning representations of the data that…

Sound · Computer Science 2021-04-20 Turab Iqbal , Karim Helwani , Arvindh Krishnaswamy , Wenwu Wang

Currently, many researchers and analysts are working toward medical diagnosis enhancement for various diseases. Heart disease is one of the common diseases that can be considered a significant cause of mortality worldwide. Early detection…

Machine Learning · Computer Science 2023-06-02 Salahaldeen Rababa , Asma Yamin , Shuxia Lu , Ashraf Obaidat

Traditionally, abnormal heart sound classification is framed as a three-stage process. The first stage involves segmenting the phonocardiogram to detect fundamental heart sounds; after which features are extracted and classification is…

Instrument classification is one of the fields in Music Information Retrieval (MIR) that has attracted a lot of research interest. However, the majority of that is dealing with monophonic music, while efforts on polyphonic material mainly…

Machine Learning · Computer Science 2021-03-03 Agelos Kratimenos , Kleanthis Avramidis , Christos Garoufis , Athanasia Zlatintsi , Petros Maragos

In this paper, a data augmentation method is proposed for depression detection from speech signals. Samples for data augmentation were created by changing the frame-width and the frame-shift parameters during the feature extraction process.…

Audio and Speech Processing · Electrical Eng. & Systems 2022-02-15 Vijay Ravi , Jinhan Wang , Jonathan Flint , Abeer Alwan

Early detection of heart arrhythmia can prevent severe future complications in cardiac patients. While manual diagnosis still remains the clinical standard, it relies heavily on visual interpretation and is inherently subjective. In recent…

Machine Learning · Computer Science 2025-11-05 Rohith Shinoj Kumar , Rushdeep Dinda , Aditya Tyagi , Annappa B. , Naveen Kumar M. R

Time-Frequency Distributions (TFDs) support the heart sound characterisation and classification in early cardiac screening. However, despite the frequent use of TFDs in signal analysis, no study comprehensively compared their performances…

Signal Processing · Electrical Eng. & Systems 2022-08-08 Xinqi Bao , Yujia Xu , Hak-Keung Lam , Mohamed Trabelsi , Ines Chihi , Lilia Sidhom , Ernest N. Kamavuako

Dementia is a growing problem as our society ages, and detection methods are often invasive and expensive. Recent deep-learning techniques can offer a faster diagnosis and have shown promising results. However, they require large amounts of…

Computation and Language · Computer Science 2022-07-19 Anna Hlédiková , Dominika Woszczyk , Alican Akman , Soteris Demetriou , Björn Schuller