Title :
Readability improvement for time frequency analysis of pathological speech
Author :
Arifianto, D. ; Setijono, H. ; Sekartedjo
Author_Institution :
Eng. Phys. Dept., Sepuluh Nopember Inst. of Technol., Indonesia
Abstract :
Time-frequency representation is widely used for non-stationary signal analysis because of its straightforwardness. A disordered speech signal is analyzed with a spectrogram and pseudo Wigner-Ville distribution, then enhanced with a reassignment method to reduce cross-term components by reassigning the signal energy. The reassigned spectrogram and reassigned PWVD are applied to vibrational abnormalities of vocal tract for larynx diseases determination. Examples are presented with interpretation for clinical diagnostics.
Keywords :
Wigner distribution; patient diagnosis; signal representation; speech; speech processing; time-frequency analysis; clinical diagnostics; disordered speech signal analysis; human voice impairments; larynx diseases determination; nonstationary signal analysis; pathological speech; pseudo Wigner-Ville distribution; readability improvement; reassigned spectrogram; reassignment method; signal enhancement; time-frequency analysis; vibrational abnormalities; vocal tract; Discrete wavelet transforms; Inspection; Instruments; Larynx; Pathology; Signal analysis; Spectrogram; Speech analysis; Speech enhancement; Time frequency analysis;
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
DOI :
10.1109/APCCAS.2002.1114934
