A method for arbitrary two-dimensional scaling of phonocardiographic signals

摘要: A heart signal comprising both first and second sounds murmurs occurring due to various conditions is modeled by a sum of sinusoids automatically selected represent the sound without noise component. In an analysis step parameters are measured, in interpolation transformation part Ω(t) A(t) interpolated from one window position next position, syntheses reconstructs transformed signal. The transformations either time scale (with unchanged frequency content ) or ( with progression ), both. Furthermore dynamic arbitrary fixed number beats per minute made possible.