Title :
Time-frequency analysis of heart sounds using windowed and smooth windowed Wigner-ville distribution
Author :
Daliman, S. ; Ameri, Ahmad Zuri Sha
Author_Institution :
Fac. of Electr. Eng., Universiti Teknologi Malaysia, Johor, Malaysia
Abstract :
Heart sounds and murmurs are time-varying signals that would best be analyzed using time-frequency analysis. Windowed Wigner-Ville distribution (WWVD) and smooth windowed Wigner-Ville distribution (SWWVD) are used to obtain the time-frequency representation (TFR) of the signal. Determination of parameter setting of WWVD and SWWVD eliminates the cross-terms and improve TFR. The accuracy of TFR is determined based on the mainlobe width and signal-to-interference ratio. It is found that the most accurate TFR can be achieved using SWWVD.
Keywords :
Wigner distribution; audio signal processing; cardiology; interference (signal); medical signal processing; smoothing methods; time-frequency analysis; heart sounds; mainlobe width; signal-to-interference ratio; smooth windowed Wigner-ville distribution; time-frequency analysis; time-frequency representation; time-varying signals; Auditory system; Chirp; Digital signal processing; Heart; Interference; Kernel; Signal analysis; Signal processing; Signal resolution; Time frequency analysis;
Conference_Titel :
Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on
Conference_Location :
Paris, France
Print_ISBN :
0-7803-7946-2
DOI :
10.1109/ISSPA.2003.1224958
