Single Sub-band Decomposition and Reconstruction of Normal Heart Sound Signals Using Wavelet Transform
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In this program, we employ wavelet transform to perform single sub-band decomposition on normal heart sound signals, enabling better understanding of their characteristics. The implementation utilizes discrete wavelet transform (DWT) algorithms through functions like wavedec and waverec from MATLAB's Wavelet Toolbox. This approach allows extraction of signal details at specific frequency bands through multi-level decomposition. Following decomposition, we reconstruct each individual sub-band using inverse wavelet transform with careful coefficient handling to restore the original heart sound signal. This technique facilitates improved analysis of heart sound signals in medical applications, potentially enhancing diagnosis and treatment of related cardiovascular conditions. The code maintains perfect reconstruction capability while enabling focused examination of specific frequency components.
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