Time-frequency analysis of heart sounds in spline basis
Journal Title: Vìsnik Nacìonalʹnogo unìversitetu "Lʹvìvsʹka polìtehnìka". Serìâ Ìnformacìjnì sistemi ta merežì - Year 2016, Vol 854, Issue
Abstract
Splines have been used for the solution of the considered problems. This allows getting a single model for the three tasks and combine flexibility of the model with ease of calculations. For filtering and segmentation of acoustic signals spline filters that are similar to Savitsky-Golay filters have been used. Various widths of spline fragments provides a possibility to have different smoothness and select fragments of varying detalization. Selection tool for the heart tones is time-frequency LSS analysis, where decomposition is based on scaled spline approximation with the method of least squares. To distinguish significant timefrequency components, selection of coefficients by Student’s t-test is used. To take into account the presence of signals in different frequency bands, original decomposition algorithm of reverse estimate of the residuals is used. As the result we have the set of parameters of timefrequency transform that characterize cardiac signals in details. This allows comparing the similarity of tones at different periods of observation, to form a generalized tone and use these parameters for classification of heart sounds.
Authors and Affiliations
Ihor Shelevytsky, Viktoria Shelevytska
Keywords
Related Articles
- EP ID EP577160
- DOI -
- Views 158
- Downloads 0
Generalized description of contrast of image elements
The problem of image quality assessment in the transmission and processing of video data in information and telecommunication systems is considered. The task of no-reference measurement of contrast of two image elements...
Peculiarities of components interaction in Android mobile platform
The main ways of interaction between Services and Activities in Android are described in the article. Advantages and disadvantages of each approach are described. The situations where a particular approach is most appro...
The Problem of Optimal Tasks Processing in Nodes of the Distributed Information System
The problem of optimal processing tasks in the nodes of a distributed information system on the basis of a mathematical model belonging to a class of two-clustering problems, for which an optimization problem with a frac...
Communities in the Direction of Repairing Roads
The article deals with the modeling of the repair of the roads of the territorial community in the presence of funds and depending on the state of roads. To simulate the proposed search method using the minimum spanning...
Definition of the extended Galois field GF(dm) with multiplier minimal hardware complexity
The paper compares realised on modern FPGA Galois fields multipliers hardware costs to select Galois field GF(dm) with approximately the same number of elements and the lowest multiplier hardware complexity. The total in...