Journal ArticleDOI
Wavelet and wavelet packet compression of electrocardiograms
Reads0
Chats0
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
More filters
Design of Energy-efficient Sensing Systems with Direct Computations on Compressively-sensed Data
TL;DR: This thesis develops methodologies that enable us to directly perform analysis on embedded signals that are compressively sensed and shows that the optimized coprocessor reduces the computational energy of an embedded signal-analysis platform by over three orders of magnitude compared to that of a low-power processor with custom instructions alone.
Patent
Filter banks for enhancing signals using oversampled subband transforms
TL;DR: In this article, a symmetric reconstruction filter bank was proposed for subband decomposition, with filtering modules adapted to the oversampling of the higher-frequency components, which is well suited to various enhancement processing applied to the subband components.
Proceedings ArticleDOI
Detection of Abnormal Heartbeats in Compressed Electrocardiograms
TL;DR: The results indicate that identification of abnormal beats in compressed ECGs is possible and future work will explore detection of abnormal Beats in compressively sensed ECG.
Proceedings ArticleDOI
Template Matching Compression Algorithm for Wearable ECG Measurement System Based on Multi Wireless Transmission Platform
TL;DR: A template matching based ECG compression algorithm for wearable ECG measurement system is proposed and implemented and the accuracy of the R-peak detection is 100%.
References
More filters
Journal ArticleDOI
A theory for multiresolution signal decomposition: the wavelet representation
TL;DR: In this paper, it is shown that the difference of information between the approximation of a signal at the resolutions 2/sup j+1/ and 2 /sup j/ (where j is an integer) can be extracted by decomposing this signal on a wavelet orthonormal basis of L/sup 2/(R/sup n/), the vector space of measurable, square-integrable n-dimensional functions.
Book
Ten lectures on wavelets
TL;DR: This paper presents a meta-analyses of the wavelet transforms of Coxeter’s inequality and its applications to multiresolutional analysis and orthonormal bases.
Journal ArticleDOI
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.