Journal ArticleDOI
Wavelet and wavelet packet compression of electrocardiograms
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TLDR
Pilot data from a blind evaluation of compressed ECG's by cardiologists suggest that the clinically useful information present in original ECG signals is preserved by 8:1 compression, and in most cases 16:1 compressed ECGs are clinically useful.Abstract:
Wavelets and wavelet packets have recently emerged as powerful tools for signal compression. Wavelet and wavelet packet-based compression algorithms based on embedded zerotree wavelet (EZW) coding are developed for electrocardiogram (ECG) signals, and eight different wavelets are evaluated for their ability to compress Holter ECG data. Pilot data from a blind evaluation of compressed ECG's by cardiologists suggest that the clinically useful information present in original ECG signals is preserved by 8:1 compression, and in most cases 16:1 compressed ECG's are clinically useful.read more
Citations
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Diagnosis of Cardiac Deceases by Using ECG Signal Compression for Effective Communication
TL;DR: It was concluded that the vertexes selected by the proposed ECG signal compression method preserved all feature points of the ECG signals and was more efficient than the amplitude zone time epoch coding method.
Proceedings ArticleDOI
A Cross-Layer Coding for Scalable ECG streaming
TL;DR: This paper proposes a linear ECG coding method whereby proneness to mis-reception due to channel errors, contention, and/or interference is traded for a soft, proportional degradation in signal definition, so the likelihood of ECG streaming interruption in BANs is vastly lessened while also enhancing capacity and relieving wireless medium contention.
Proceedings ArticleDOI
Customizing a discrete wavelet transform filter bank using the lifting scheme for improved compression ratios of an ECG
TL;DR: In this article, a lifting scheme is used to adaptively change a biorthogonal filter bank, which implements a discrete wavelet transform (DWT), for improved compression of an ECG waveform.
Statistical and Wavelet Transform-Based Study of the Latitudinal Ionospheric Response to an Annular Solar Eclipse on June 21, 2020
Book ChapterDOI
Using cross-layer techniques for ECG transmissions in body area sensor networks
Tao Ma,Michael Hempel,Dongming Peng,Hamid Sharif,Fahimeh Rezaei,Pradhumna Lal Shrestha,Hsiao-Hwa Chen +6 more
TL;DR: This chapter introduces, survey, and analyze effective cross-layer strategies for wireless ECG transmissions in BASN, and showcases two security methods—selective encryption and self-authentication.
References
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Ten Lectures on Wavelets
TL;DR: In this article, the regularity of compactly supported wavelets and symmetry of wavelet bases are discussed. But the authors focus on the orthonormal bases of wavelets, rather than the continuous wavelet transform.
Journal ArticleDOI
Orthonormal bases of compactly supported wavelets
TL;DR: This work construct orthonormal bases of compactly supported wavelets, with arbitrarily high regularity, by reviewing the concept of multiresolution analysis as well as several algorithms in vision decomposition and reconstruction.
Journal ArticleDOI
A new, fast, and efficient image codec based on set partitioning in hierarchical trees
Amir Said,William A. Pearlman +1 more
TL;DR: The image coding results, calculated from actual file sizes and images reconstructed by the decoding algorithm, are either comparable to or surpass previous results obtained through much more sophisticated and computationally complex methods.