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Noise-Aware Self-Supervised Denoising for Electrocardiogram Anomaly Detection

SSRN, ISSN: 1556-5068
2023
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    Citations
  • 229
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Usage
    229
    • Abstract Views
      172
    • Downloads
      57
  • Ratings
    • Download Rank
      759,268

Article Description

The electrocardiogram (ECG) is a non-invasive and straightforward diagnostic tool commonly employed to identify heart conditions. ECG anomaly detection aims to find abnormal patterns including disease data and invalid noise data. In this paper, we propose a simple and effective self-supervised anomaly detection technique called Noise Distribution Aware Autoencoder (NDAAE), where a novel proxy task is designed for self-supervised learning of normal ECG representations, by conducting noise-aware denoising of ECG signal, where the learned representation is robust enough to distinguish data with anomalous patterns from normal ones. Specifically, we employ the following procedure: Firstly, we randomly inject five distinct noise signals into the original ECG data. Subsequently, the ECG data with added noise is passed through an autoencoder to reconstruct the original ECG data without noise. Finally, we integrate the noise classification task, which guides the model to reduce noise effectively, into the auto-encoder framework. This leads to the acquisition of a more effective ECG representation, facilitating advanced anomaly detection capabilities. We evaluate our proposed method on real ECG datasets, and the empirical results illustrate that our model outperforms existing approaches in detecting anomalies.

Bibliographic Details

Peng Chen; Miaolei Deng; Dexian Zhang; Bing Zhou; Haoyi Fan

Elsevier BV

Multidisciplinary; Electrocardiogram; Time Series; anomaly detection; denoising; autoencoder

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