Using nonlocal means to separate cardiac and respiration sounds |
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Authors: | A G Rudnitskii |
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Institution: | 1. Institute of Hydromechanics, National Academy of Sciences of Ukraine, ul. Zhelyaebova 8/4, Kyiv, 03680, Ukraine
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Abstract: | The paper presents the results of applying nonlocal means (NLMs) approach in the problem of separating respiration and cardiac sounds in a signal recorded on a human chest wall. The performance of the algorithm was tested both by simulated and real signals. As a quantitative efficiency measure of NLM filtration, the angle of divergence between isolated and reference signal was used. It is shown that for a wide range of signal-to-noise ratios, the algorithm makes it possible to efficiently solve this problem of separating cardiac and respiration sounds in the sum signal recorded on a human chest wall. |
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